Patent Grant
11549146
The invention relates to genetics and medicine.
All publications cited herein are incorporated by reference in their entirety to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference. The following description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
Crohn's disease (CD) and ulcerative colitis (UC), the two common forms of idiopathic inflammatory bowel disease (IBD), are chronic, relapsing inflammatory disorders of the gastrointestinal tract. Each has a peak age of onset in the second to fourth decades of life and prevalences in European ancestry populations that average approximately 100-150 per 100,000 (D. K. Podolsky, N Engl J Med 347, 417 (2002); E. V. Loftus, Jr., Gastroenterology 126, 1504 (2004)). Although the precise etiology of IBD remains to be elucidated, a widely accepted hypothesis is that ubiquitous, commensal intestinal bacteria trigger an inappropriate, overactive, and ongoing mucosal immune response that mediates intestinal tissue damage in genetically susceptible individuals (D. K. Podolsky, N Engl J Med 347, 417 (2002)). Genetic factors play an important role in IBD pathogenesis, as evidenced by the increased rates of IBD in Ashkenazi Jews, familial aggregation of IBD, and increased concordance for IBD in monozygotic compared to dizygotic twin pairs (S. Vermeire, P. Rutgeerts, Genes Immun 6, 637 (2005)). CD and UC are thought to be related disorders that share some genetic susceptibility loci but differ at others.
Thus, there is need in the art to determine other genes, allelic variants and/or haplotypes that may assist in explaining the genetic risk, diagnosing, and/or predicting susceptibility for or protection against inflammatory bowel disease including but not limited to CD and/or UC.
Various embodiments of the present invention provide for a method of prognosing high or low probability of developing an inflammatory bowel disease (IBD) in a subject, comprising: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, prognosing high probability of developing the IBD in the subject; or upon not detecting the risk allele, prognosing low probability of developing the IBD in the subject.
In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. In various embodiments, the gene/genetic locus comprise one or more of SEQ ID NO: 1-SEQ ID NO: 341.
In various other embodiments, genotyping the subject comprises: obtaining a sample from the subject; and genotyping the sample for the risk allele at the gene/genetic locus. In yet other embodiments, genotyping the sample comprises: contacting the sample with an oligonucleotide probe specific to the risk allele; generating an allele-specific hybridization complex between the oligonucleotide probe and the risk allele; and upon detecting the allele-specific hybridization complex, detecting the risk allele; or upon not detecting the allele-specific hybridization complex, not detecting the risk allele. In some embodiments, the oligonucleotide probe is labeled with a fluorescent dye, and wherein detecting the allele-specific hybridization complex comprises detecting fluorescence signal from the oligonucleotide probe. In other embodiments, the oligonucleotide probe comprises a reporter dye and a quencher dye.
In various embodiments, the method further comprises conducting PCR amplification after forming the allele-specific hybridization complex.
Various embodiments of the present invention provide for a method of diagnosing an inflammatory bowel disease (IBD) in a subject, comprising: genotyping a sample from the subject for a risk allele at a gene/genetic locus; upon detecting the risk allele, diagnosing IBD in the subject; and administering an IBD therapy to the subject diagnosed with IBD, thereby treating IBD in the subject. In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. In various embodiments, the gene/genetic locus comprise one or more of SEQ ID NO: 1-SEQ ID NO: 341. In various embodiments, the method further comprises providing an IBD therapy to the subject. In some embodiments, the IBD therapy comprises anti-TNF therapy, anti-TL1A therapy, colectomy, or a combination thereof.
Various embodiments of the present invention provide for a method, comprising: genotyping a sample from the subject for a risk allele at a gene/genetic locus; upon detecting the risk allele, diagnosing IBD in the subject; and administering the IBD therapy to the subject diagnosed with IBD, thereby treating IBD in the subject. In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. In various other embodiments, the gene/genetic locus comprise one or more of SEQ ID NO: 1-SEQ ID NO: 341. In various embodiments, the method further comprises providing an IBD therapy to the subject. In some embodiments, the IBD therapy comprises anti-TNF therapy, anti-TL1A therapy, colectomy, or a combination thereof.
Various embodiments of the present invention provide for a method of identifying genes/genetic loci associated with a condition, comprising: acquiring genetic data from samples of a cohort of the condition; performing a GLS transformation on the genetic data, thereby decorrelating the genetic data; conducting gene-based analysis on the GLS-transformed genetic data; and identifying genes/genetic loci associated with the condition. In various embodiments, the condition is IBD, CD, or UC, or a combination thereof. In some embodiments, the cohort comprises correlated subjects or family subjects. In other embodiments, the genetic data comprise SNP genotypes. In yet other embodiments, performing the GLS transformation comprises transforming the genetic data according to functions G=Σo−1/2, Gy=GXβ+Ge, {circumflex over (β)}GLS=(X′Σo−1X)−1X′Σo−1y, var({circumflex over (β)}GLS)=var((X′Σo−1X)−1X′Σo−1y)=(X′Σo−1X)−1, or a combination thereof.
In various embodiments, conducting gene-based analysis comprises applying a gene-based test based on the assumption of independent or uncorrelated subjects. In various embodiments, conducting gene-based analysis comprises applying C-alpha, SKAT, SKAT-CommonRare, CMC, WSS, Variable Threshold, or Comprehensive Approach, or a combination thereof.
Exemplary embodiments are illustrated in referenced figures. It is intended that the embodiments and figures disclosed herein are to be considered illustrative rather than restrictive.
All references cited herein are incorporated by reference in their entirety as though fully set forth. Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Allen et al., Remington: The Science and Practice of Pharmacy 22nd ed., Pharmaceutical Press (Sep. 15, 2012); Hornyak et al., Introduction to Nanoscience and Nanotechnology, CRC Press (2008); Singleton and Sainsbury, Dictionary of Microbiology and Molecular Biology 3rd ed., revised ed., J. Wiley & Sons (New York, N.Y. 2006); Smith, March's Advanced Organic Chemistry Reactions, Mechanisms and Structure 7th ed., J. Wiley & Sons (New York, N.Y. 2013); Singleton, Dictionary of DNA and Genome Technology 3rd ed., Wiley-Blackwell (Nov. 28, 2012); and Green and Sambrook, Molecular Cloning: A Laboratory Manual 4th ed., Cold Spring Harbor Laboratory Press (Cold Spring Harbor, N.Y. 2012), provide one skilled in the art with a general guide to many of the terms used in the present application. For references on how to prepare antibodies, see Greenfield, Antibodies A Laboratory Manual 2nd ed., Cold Spring Harbor Press (Cold Spring Harbor N.Y., 2013); Köhler and Milstein, Derivation of specific antibody-producing tissue culture and tumor lines by cell fusion, Eur. J. Immunol. 1976 Jul. 6(7):511-9; Queen and Selick, Humanized immunoglobulins, U.S. Pat. No. 5,585,089 (1996 December); and Riechmann et al., Reshaping human antibodies for therapy, Nature 1988 Mar. 24, 332(6162):323-7.
One skilled in the art will recognize many methods and materials similar or equivalent to those described herein, which could be used in the practice of the present invention. Other features and advantages of the invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, various features of embodiments of the invention. Indeed, the present invention is in no way limited to the methods and materials described. For convenience, certain terms employed herein, in the specification, examples and appended claims are collected here.
Unless stated otherwise, or implicit from context, the following terms and phrases include the meanings provided below. Unless explicitly stated otherwise, or apparent from context, the terms and phrases below do not exclude the meaning that the term or phrase has acquired in the art to which it pertains. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should be understood that this invention is not limited to the particular methodology, protocols, and reagents, etc., described herein and as such can vary. The definitions and terminology used herein are provided to aid in describing particular embodiments, and are not intended to limit the claimed invention, because the scope of the invention is limited only by the claims.
As used herein the term “comprising” or “comprises” is used in reference to compositions, methods, and respective component(s) thereof, that are useful to an embodiment, yet open to the inclusion of unspecified elements, whether useful or not. It will be understood by those within the art that, in general, terms used herein are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). Although the open-ended term “comprising,” as a synonym of terms such as including, containing, or having, is used herein to describe and claim the invention, the present invention, or embodiments thereof, may alternatively be described using alternative terms such as “consisting of” or “consisting essentially of.”
Unless stated otherwise, the terms “a” and “an” and “the” and similar references used in the context of describing a particular embodiment of the application (especially in the context of claims) can be construed to cover both the singular and the plural. The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (for example, “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the application and does not pose a limitation on the scope of the application otherwise claimed. The abbreviation, “e.g.” is derived from the Latin exempli gratia, and is used herein to indicate a non-limiting example. Thus, the abbreviation “e.g.” is synonymous with the term “for example.” No language in the specification should be construed as indicating any non-claimed element essential to the practice of the application.
As used herein, the terms “treat,” “treatment,” “treating,” or “amelioration” when used in reference to a disease, disorder or medical condition, refer to both therapeutic treatment and prophylactic or preventative measures, wherein the object is to prevent, reverse, alleviate, ameliorate, inhibit, lessen, slow down or stop the progression or severity of a symptom or condition. The term “treating” includes reducing or alleviating at least one adverse effect or symptom of a condition. Treatment is generally “effective” if one or more symptoms or clinical markers are reduced. Alternatively, treatment is “effective” if the progression of a disease, disorder or medical condition is reduced or halted. That is, “treatment” includes not just the improvement of symptoms or markers, but also a cessation or at least slowing of progress or worsening of symptoms that would be expected in the absence of treatment. Also, “treatment” may mean to pursue or obtain beneficial results, or lower the chances of the individual developing the condition even if the treatment is ultimately unsuccessful. Those in need of treatment include those already with the condition as well as those prone to have the condition or those in whom the condition is to be prevented.
“Beneficial results” or “desired results” may include, but are in no way limited to, lessening or alleviating the severity of the disease condition, preventing the disease condition from worsening, curing the disease condition, preventing the disease condition from developing, lowering the chances of a patient developing the disease condition, decreasing morbidity and mortality, and prolonging a patient's life or life expectancy. As non-limiting examples, “beneficial results” or “desired results” may be alleviation of one or more symptom(s), diminishment of extent of the deficit, stabilized (i.e., not worsening) state of intestinal inflammation and/or fibrosis, delay or slowing of intestinal inflammation and/or fibrosis, and amelioration or palliation of symptoms associated with intestinal inflammation and/or fibrosis.
“Diseases”, “conditions” and “disease conditions,” as used herein may include, but are in no way limited to any form of intestinal inflammation or intestinal inflammation-related condition, disease or disorder, for example, intestinal inflammation, intestinal fibrosis, inflammatory bowel disease (IBD), Crohn's disease (CD), ulcerative colitis (UC), colitis, acute colitis, and chronic colitis.
method of prognosing high or low probability of developing an inflammatory bowel disease (IBD) in a subject, comprising: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, prognosing high probability of developing the IBD in the subject; or upon not detecting the risk allele, prognosing low probability of developing the IBD in the subject.
“Risk variant” as used herein refers to an allele, whose presence is associated with an increase in susceptibility to an inflammatory bowel disease, including but not limited to Crohn's Disease and ulcerative colitis, relative to an individual who does not have the risk variant.
“High probability”, as used herein refers to an increase in susceptibility to an inflammatory bowel disease, when the risk variants are present in an individual, relative to an individual who does not have the risk variants.
“Low probability”, as used herein refers to a decrease in susceptibility to an inflammatory bowel disease, when the risk variants are absent in an individual, relative to an individual who has the risk variants.
As used herein, the term “administering,” refers to the placement an agent as disclosed herein into a subject by a method or route which results in at least partial localization of the agents at a desired site. “Route of administration” may refer to any administration pathway known in the art, including but not limited to aerosol, nasal, oral, transmucosal, transdermal, parenteral, enteral, topical or local. “Parenteral” refers to a route of administration that is generally associated with injection, including intracranial, intraventricular, intrathecal, epidural, intradural, intraorbital, infusion, intraarterial, intracapsular, intracardiac, intradermal, intramuscular, intraperitoneal, intrapulmonary, intraspinal, intrasternal, intrathecal, intrauterine, intravenous, subarachnoid, subcapsular, subcutaneous, transmucosal, or transtracheal. Via the parenteral route, the compositions may be in the form of solutions or suspensions for infusion or for injection, or as lyophilized powders. Via the enteral route, the pharmaceutical compositions can be in the form of tablets, gel capsules, sugar-coated tablets, syrups, suspensions, solutions, powders, granules, emulsions, microspheres or nanospheres or lipid vesicles or polymer vesicles allowing controlled release. Via the topical route, the pharmaceutical compositions can be in the form of aerosol, lotion, cream, gel, ointment, suspensions, solutions or emulsions. In accordance with the present invention, “administering” can be self-administering. For example, it is considered as “administering” that a subject consumes a composition as disclosed herein.
The term “sample” or “biological sample” as used herein denotes a sample taken or isolated from a biological organism, e.g., a blood sample from a subject. Exemplary biological samples include, but are not limited to, cheek swab; mucus; whole blood, blood, serum; plasma; urine; saliva; semen; lymph; fecal extract; sputum; other body fluid or biofluid; cell sample; and/or tissue sample etc. The term also includes a mixture of the above-mentioned samples. The term “sample” also includes untreated or pretreated (or pre-processed) biological samples. In some embodiments, a sample can comprise one or more cells from the subject.
As used herein, a “subject” means a human or animal. Usually the animal is a vertebrate such as a primate, rodent, domestic animal or game animal. Primates include chimpanzees, cynomologous monkeys, spider monkeys, and macaques, e.g., Rhesus. Rodents include mice, rats, woodchucks, ferrets, rabbits and hamsters. Domestic and game animals include cows, horses, pigs, deer, bison, buffalo, feline species, e.g., domestic cat, and canine species, e.g., dog, fox, wolf. The terms, “patient”, “individual” and “subject” are used interchangeably herein. In an embodiment, the subject is mammal. The mammal can be a human, non-human primate, mouse, rat, dog, cat, horse, or cow, but are not limited to these examples. In addition, the methods described herein can be used to treat domesticated animals and/or pets.
“Mammal” as used herein refers to any member of the class Mammalia, including, without limitation, humans and nonhuman primates such as chimpanzees and other apes and monkey species; farm animals such as cattle, sheep, pigs, goats and horses; domestic mammals such as dogs and cats; laboratory animals including rodents such as mice, rats and guinea pigs, and the like. The term does not denote a particular age or sex. Thus, adult and newborn subjects, as well as fetuses, whether male or female, are intended to be included within the scope of this term.
A subject can be one who has been previously diagnosed with or identified as suffering from or having a condition in need of treatment (e.g., intestinal inflammation and/or fibrosis, IBD, CD, UC, colitis, acute colitis, and chronic colitis) or one or more complications related to the condition, and optionally, have already undergone treatment for the condition or the one or more complications related to the condition. Alternatively, a subject can also be one who has not been previously diagnosed as having a condition or one or more complications related to the condition. For example, a subject can be one who exhibits one or more risk factors for a condition or one or more complications related to the condition or a subject who does not exhibit risk factors. A “subject in need” of treatment for a particular condition can be a subject suspected of having that condition, diagnosed as having that condition, already treated or being treated for that condition, not treated for that condition, or at risk of developing that condition.
The term “statistically significant” or “significantly” refers to statistical evidence that there is a difference. It is defined as the probability of making a decision to reject the null hypothesis when the null hypothesis is actually true. The decision is often made using the p-value.
As used herein, “a disease's Odds” or “Odds of a disease” in a certain population is defined as the ratio between disease probability and non-disease probability in such a population (i.e., a disease's Odds=disease probability/non-disease probability).
As used herein, “a risk allele's Odds Ratio (OR)” or “Odds Ratio (OR) of a risk allele” with respect to a disease is defined as the ratio between the disease's Odds in the risk allele's carrier population and the disease's Odds in the risk allele's non-carrier population. (i.e., a risk allele's OR=the disease's Odds in carriers/the disease's Odds in non-carriers).
This invention provides methods of identifying genes/genetic loci associated with a condition such as IBD. The identification of these genes/genetic loci can be used for risk stratification of a population with respect to IBD. We could use such a tool at birth to identify people at risk for IBD with the intent of impacting the population by delivering preventative interventions that could modulate environmental epigenetic factors. This invention also provides methods of diagnosing IBD and methods of individualizing IBD treatment plans as a precision medicine approach.
Prognosing
Various embodiments of the present invention provide for a method of prognosing high or low probability of developing an inflammatory bowel disease (IBD) in a subject, comprising: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, prognosing high probability of developing the IBD in the subject; or upon not detecting the risk allele, prognosing low probability of developing the IBD in the subject.
In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. In various embodiments, the gene/genetic locus comprise one or more of SEQ ID NO: 1-SEQ ID NO: 341.
In various other embodiments, genotyping the subject comprises: obtaining a sample from the subject; and genotyping the sample for the risk allele at the gene/genetic locus. In yet other embodiments, genotyping the sample comprises: contacting the sample with an oligonucleotide probe specific to the risk allele; generating an allele-specific hybridization complex between the oligonucleotide probe and the risk allele; and upon detecting the allele-specific hybridization complex, detecting the risk allele; or upon not detecting the allele-specific hybridization complex, not detecting the risk allele. In some embodiments, the oligonucleotide probe is labeled with a fluorescent dye, and wherein detecting the allele-specific hybridization complex comprises detecting fluorescence signal from the oligonucleotide probe. In other embodiments, the oligonucleotide probe comprises a reporter dye and a quencher dye.
In various embodiments, the method further comprises conducting PCR amplification after forming the allele-specific hybridization complex.
Various embodiments of the present invention provide a method of prognosing high or low probability of developing an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, prognosing high probability of developing the IBD in the subject; or upon not detecting the risk allele, prognosing low probability of developing the IBD in the subject.
Various embodiments of the present invention provide a method of prognosing high probability of developing an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, prognosing high probability of developing the IBD in the subject.
Various embodiments of the present invention provide a method of prognosing low probability of developing an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon not detecting the risk allele, prognosing low probability of developing the IBD in the subject.
In accordance with the present invention, high or low probability of developing IBD means that a subject has more or less likelihood of developing IBD as compared to the general population which the subject belongs to.
Diagnosing
Various embodiments of the present invention provide for a method of diagnosing an inflammatory bowel disease (IBD) in a subject, comprising: genotyping a sample from the subject for a risk allele at a gene/genetic locus; upon detecting the risk allele, diagnosing IBD in the subject; and administering an IBD therapy to the subject diagnosed with IBD, thereby treating IBD in the subject. In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. In various embodiments, the gene/genetic locus comprise one or more of SEQ ID NO: 1-SEQ ID NO: 341. In some embodiments, the IBD therapy comprises anti-TNF therapy, anti-TL1A therapy, colectomy, or a combination thereof.
Various embodiments of the present invention provide for a method, comprising: genotyping a sample from the subject for a risk allele at a gene/genetic locus; upon detecting the risk allele, diagnosing IBD in the subject; and administering an IBD therapy to the subject diagnosed with IBD, thereby treating IBD in the subject. In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. In various other embodiments, the gene/genetic locus comprise one or more of SEQ ID NO: 1-SEQ ID NO: 341. In various embodiments, the method further comprises providing an IBD therapy to the subject. In some embodiments, the IBD therapy comprises anti-TNF therapy, anti-TL1A therapy, colectomy, or a combination thereof.
Various embodiments of the present invention provide a method of identifying susceptibility to or identifying protection against an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, identifying susceptibility to the IBD in the subject; or upon not detecting the risk allele, identifying protection against the IBD in the subject.
Various embodiments of the present invention provide a method of identifying susceptibility to an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, identifying susceptibility to the IBD in the subject.
Various embodiments of the present invention provide a method of identifying protection against an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon not detecting the risk allele, identifying protection against the IBD in the subject.
In accordance with the present invention, susceptibility to IBD means that a subject has more likelihood of developing IBD as compared to the general population which the subject belongs to. In accordance with the present invention, protection against IBD means that a subject has less likelihood of developing IBD as compared to the general population which the subject belongs to.
Various embodiments of the present invention provide a method of diagnosing an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, diagnosing the IBD in the subject; or upon not detecting the risk allele, not diagnosing the IBD in the subject.
Various embodiments of the present invention provide a method of diagnosing an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; detecting the risk allele; and diagnosing the IBD in the subject.
Various embodiments of the present invention provide a method of treating an inflammatory bowel disease (IBD) in a subject. The method comprises: administering the IBD therapy to the subject, wherein the subject is diagnosed with the IBD according to a method as described herein, thereby treating the IBD in the subject. In various embodiments, the method further comprises providing an IBD therapy to the subject.
Various embodiments of the present invention provide a method of treating an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, administering the IBD therapy to the subject; or upon not detecting the risk allele, not administering the IBD therapy to the subject. In various embodiments, the method further comprises providing an IBD therapy to the subject.
Various embodiments of the present invention provide a method of treating an inflammatory bowel disease (IBD) in a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; detecting the risk allele; and administering the IBD therapy to the subject, thereby treating the IBD in the subject. In various embodiments, the method further comprises providing an IBD therapy to the subject.
Various embodiments of the present invention provide a method of administering an inflammatory bowel disease (IBD) therapy to a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; and upon detecting the risk allele, administering the IBD therapy to the subject; or upon not detecting the risk allele, not administering the IBD therapy to the subject.
Various embodiments of the present invention provide a method of administering an inflammatory bowel disease (IBD) therapy to a subject. The method comprises: genotyping the subject for a risk allele at a gene/genetic locus; detecting the risk allele; and administering the IBD therapy to the subject.
In various embodiments, the IBD therapy comprises anti-TNF therapy, anti-TL1A therapy, or colectomy, or a combination thereof. In some embodiments, the IBD therapy is an anti-TNF antibody. In some embodiments, the IBD therapy is an anti-TL1A antibody. In some embodiments, the IBD therapy is colectomy.
In various embodiments, the subject is a human. In some embodiments, the subject is a child. In some embodiments, the subject is a teenager. In other embodiments, the subject is an adult. In various embodiments, the IBD is Crohn's disease (CD) or ulcerative colitis (UC).
In various embodiments, the sample is cheek swab; mucus; whole blood; blood; serum; plasma; urine; saliva; semen; lymph; fecal extract; sputum; other body fluid or biofluid; cell sample; or tissue sample; or a combination thereof. In various embodiments, the sample comprises a nucleic acid from the individual. In some embodiments, the nucleic acid comprises genomic DNA. In various embodiments, the sample is a body fluid. In some embodiments, the body fluid is whole blood, plasma, saliva, mucus, or cheek swab. In various embodiments, the sample is a cell or tissue. In some embodiments, the cell is a blood cell. In some embodiments, the cell is a blood cell line (e.g., a lymphoblastoid cell line) obtained from the subject and transformed with an Epstein Barr virus.
In various embodiments, the gene/genetic locus comprises 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or more, or all of the genes/genetic loci listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the gene/genetic locus comprises SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A. Each gene can comprise the following sequences: SLC26A4 (SEQ ID NOs: 1-6); DLG4 (SEQ ID NO: 7); GIPR (SEQ ID NOs: 8-27); ZHX3 (SEQ ID NOs: 28-30); TNRC6B (SEQ ID NOs: 31-38); CDK6 (SEQ ID NOs: 39-40); PRR5L (SEQ ID NOs: 41-54); WNT2B (SEQ ID NOs: 55-58); LRRC16A (SEQ ID NOs: 59-75, 335); HIST1 cluster (all Histone cluster 1 genes—SEQ ID NOs: 76-173, 338, 339); GTF2IRD2B (SEQ ID NOs: 174-180); ETS1 (SEQ ID NOs: 181-325); SLC5A1 (SEQ ID NOs: 326-327); and TET2 (SEQ ID NOs: 328-332, 334).
In various embodiments, the risk allele comprises 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more, or all of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the risk allele comprises 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 99, or 100, or more, or all of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the risk allele comprises N of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341, and wherein N is a positive integer not more than 341 (i.e., 1≤N≤341). In various embodiments, the risk allele comprises 1-5, 5-10, 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65, 65-70, 70-75, 75-80, 80-85, 85-90, 90-95, or 95-100 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the risk allele comprises 100-105, 105-110, 110-115, 115-120, 120-125, 125-130, 130-135, 135-140, 140-145, 145-150, 150-155, 155-160, 160-165, 165-170, 170-175, 175-180, 180-185, 185-190, 190-195, or 195-200 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the risk allele comprises 200-205, 205-210, 210-215, 215-220, 220-225, 325-230, 230-235, 235-240, 240-245, 245-250, 250-255, 255-260, 260-265, 265-270, 270-275, 275-280, 280-285, 285-290, 290-295, or 295-300 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the risk allele comprises 300-305, 305-310, 310-315, 315-320, 320-325, 325-330, or 330-341 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341.
In some embodiments, the subject's genotypes can be obtained from previous genetic or genomic tests performed on the subject and those previous tests were not performed with particular respect to IBD or any condition. For example, the subject's genotypes can be obtained from analyzing the subject's genome sequencing results, or obtained from a database storing the subject's personal genetic or genomic information. In these embodiments, genotyping the subject does not require conducting laboratory tests on the subject, as it involves acquiring and analyzing data already available. In other embodiments, for example, when personal genetic or genomic information is not available or when subject or physician desire new laboratory tests, genotyping the subject requires conducting laboratory tests on the subject.
In various embodiments of the present invention, genotyping the subject comprises: obtaining a sample from the subject; and genotyping the sample for the risk allele at the gene/genetic locus.
In some embodiments, genotyping the sample comprises: contacting the sample with an oligonucleotide probe specific to the risk allele; generating an allele-specific hybridization complex between the oligonucleotide probe and the risk allele; and upon detecting the allele-specific hybridization complex, detecting the risk allele; or upon not detecting the allele-specific hybridization complex, not detecting the risk allele. In various embodiments, the oligonucleotide probe is labeled with a fluorescent dye, and wherein detecting the allele-specific hybridization complex comprises detecting fluorescence signal from the oligonucleotide probe. In various embodiments, the oligonucleotide probe comprises a reporter dye and a quencher dye. In certain embodiments, the method further comprises conducting PCR amplification after forming the allele-specific hybridization complex. In various embodiments, detecting the allele-specific hybridization complex comprises detecting the electrophoretic mobility of the allele-specific hybridization complex.
In various embodiments, genotyping the sample comprises detecting a SNP's alleles in the sample by: contacting the sample with detection agents that specifically bind to the SNP's alleles; and detecting the binding levels between the detection agents and the SNP's alleles. Alleles can be detected by genotyping assays, PCR, Reverse transcription PCR, real-time PCR, microarray, DNA sequencing, and RNA sequencing techniques.
Various embodiments of the present invention provide a composition. In various embodiments, the composition comprises one or more detection agents that specifically bind to one or more alleles at one or more genes/genetic loci. This composition may be used to identify genes/genetic loci associated with a condition, and/or to prognose low or high probability of developing IBD, and/or to prognose susceptibility to or protection against IBD, and/or to diagnose IBD, and/or to treat IBD, and/or to direct administering an IBD therapy.
In various embodiments, the detection agents are oligonucleotide probes, nucleic acids, DNAs, RNAs, aptamers, peptides, proteins, antibodies, avimers, or small molecules, or a combination thereof. In some embodiments, the detection agents are allele-specific oligonucleotide probes targeting the SNP's alleles. In various embodiments, a SNP's alleles are detected by using a microarray. In some embodiments, the microarray is an oligonucleotide microarray, DNA microarray, cDNA microarrays, RNA microarray, peptide microarray, protein microarray, or antibody microarray, or a combination thereof.
In various embodiments, detecting a SNP's alleles comprises: contacting the sample with one or more allele-specific oligonucleotide probes targeting the SNP's alleles; generating double-stranded hybridization complex through allele-specific binding between the SNP's alleles and said allele-specific oligonucleotide probes; and detecting the double-stranded hybridization complex newly generated through allele-specific binding between the SNP's alleles and said allele-specific oligonucleotide probes. In some embodiments, the method further comprises conducting PCR amplification of the double-stranded hybridization complex.
In various embodiments, the present invention provides allele-specific oligonucleotide probes for each of the alleles (e.g., major alleles, minor alleles, risk alleles, and non-risk alleles listed Table 1. In accordance with the present invention, said allele-specific oligonucleotide probes may comprise about 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, or 45-50 nucleotides; they are either identical or complementary to a sequence segment encompassing the polymorphic position of a SNP as disclosed herein; and they are specific to one or the other allele at the polymorphic position. For a non-limiting example, rs10247487 has either T or C allele (in the context of forward strand) at its polymorphic position (e.g., “Y” at nucleotide 501 of the following exemplar sequence (SEQ ID NO: 1).
Hence, an allele-specific oligonucleotide probe for the T allele at rs10247487 may comprise, for a non-limiting example, 21 nucleotides; and these 21 nucleotides are either identical or complementary to the sequence segment 481-501, 482-502, 483-503, 484-504, 485-505, 486-506, 487-507, 488-508, 489-509, 490-511, 491-511, 492-512, 493-513, 494-514, 495-515, 496-516, 497-517, 498-518, 499-519, 500-520, or 501-521 of the above exemplar sequence where nucleotide 501 is set as the T allele. Vice versa, an allele-specific oligonucleotide probe for the C allele at rs10247487 may comprise, for a non-limiting example, 21 nucleotides; and these 21 nucleotides are either identical or complementary to the sequence segment 481-501, 482-502, 483-503, 484-504, 485-505, 486-506, 487-507, 488-508, 489-509, 490-511, 491-511, 492-512, 493-513, 494-514, 495-515, 496-516, 497-517, 498-518, 499-519, 500-520, or 501-521 of the above exemplar sequence where nucleotide 501 is set as the C allele.
In various embodiments, said allele-specific oligonucleotide probes are labeled with one or more fluorescent dyes, and wherein detecting the double-stranded hybridization complex comprises detecting fluorescence signals from the fluorescent dyes. In some embodiments, said allele-specific oligonucleotide probes are labeled with a reporter dye and a quencher dye. In some embodiments, detecting the double-stranded hybridization complex comprises detecting the electrophoretic mobility of the double-stranded hybridization complex.
A variety of methods can be used to detect the presence or absence of a variant allele or haplotype. As an example, enzymatic amplification of nucleic acid from an individual may be used to obtain nucleic acid for subsequent analysis. The presence or absence of a variant allele or haplotype may also be determined directly from the individual's nucleic acid without enzymatic amplification.
Detecting the presence or absence of a variant allele or haplotype may involve amplification of an individual's nucleic acid by the polymerase chain reaction. Use of the polymerase chain reaction for the amplification of nucleic acids is well known in the art (see, for example, Mullis et al. (Eds.), The Polymerase Chain Reaction, Birkhauser, Boston, (1994)).
Analysis of the nucleic acid from an individual, whether amplified or not, may be performed using any of various techniques. Useful techniques include, without limitation, polymerase chain reaction based analysis, sequence analysis and electrophoretic analysis. As used herein, the term “nucleic acid” means a polynucleotide such as a single or double-stranded DNA or RNA molecule including, for example, genomic DNA, cDNA and mRNA. The term nucleic acid encompasses nucleic acid molecules of both natural and synthetic origin as well as molecules of linear, circular or branched configuration representing either the sense or antisense strand, or both, of a native nucleic acid molecule.
A TaqmanB allelic discrimination assay available from Applied Biosystems may be useful for determining the presence or absence of a variant allele. In a TaqmanB allelic discrimination assay, a specific, fluorescent, dye-labeled probe for each allele is constructed. The probes contain different fluorescent reporter dyes such as FAM and VICTM to differentiate the amplification of each allele. In addition, each probe has a quencher dye at one end which quenches fluorescence by fluorescence resonant energy transfer (FRET). During PCR, each probe anneals specifically to complementary sequences in the nucleic acid from the individual. The 5′ nuclease activity of Taq polymerase is used to cleave only probe that hybridize to the allele. Cleavage separates the reporter dye from the quencher dye, resulting in increased fluorescence by the reporter dye. Thus, the fluorescence signal generated by PCR amplification indicates which alleles are present in the sample. Mismatches between a probe and allele reduce the efficiency of both probe hybridization and cleavage by Taq polymerase, resulting in little to no fluorescent signal. Improved specificity in allelic discrimination assays can be achieved by conjugating a DNA minor grove binder (MGB) group to a DNA probe as described, for example, in Kutyavin et al., “3′-minor groove binder-DNA probes increase sequence specificity at PCR extension temperature,” Nucleic Acids Research 28:655-661 (2000)). Minor grove binders include, but are not limited to, compounds such as dihydrocyclopyrroloindole tripeptide (DPI).
Sequence analysis also may also be useful for determining the presence or absence of a variant allele or haplotype.
Restriction fragment length polymorphism (RFLP) analysis may also be useful for determining the presence or absence of a particular allele (Jarcho et al. in Dracopoli et al., Current Protocols in Human Genetics pages 2.7.1-2.7.5, John Wiley & Sons, New York; Innis et al., (Ed.), PCR Protocols, San Diego: Academic Press, Inc. (1990)). As used herein, restriction fragment length polymorphism analysis is any method for distinguishing genetic polymorphisms using a restriction enzyme, which is an endonuclease that catalyzes the degradation of nucleic acid and recognizes a specific base sequence, generally a palindrome or inverted repeat. One skilled in the art understands that the use of RFLP analysis depends upon an enzyme that can differentiate two alleles at a polymorphic site.
Allele-specific oligonucleotide hybridization may also be used to detect a variant allele or haplotype. Allele-specific oligonucleotide hybridization is based on the use of a labeled oligonucleotide probe having a sequence perfectly complementary, for example, to the sequence encompassing a variant allele or haplotype. Under appropriate conditions, the allele-specific probe hybridizes to a nucleic acid containing the variant allele or haplotype but does not hybridize to the other alleles or haplotypes, which have one or more nucleotide mismatches as compared to the probe. If desired, a second allele-specific oligonucleotide probe that matches an alternate allele also can be used. Similarly, the technique of allele-specific oligonucleotide amplification can be used to selectively amplify, for example, a variant allele or haplotype by using an allele-specific oligonucleotide primer that is perfectly complementary to the nucleotide sequence of the variant allele or haplotype but which has one or more mismatches as compared to other alleles or haplotypes (Mullis et al., supra, (1994)). One skilled in the art understands that the one or more nucleotide mismatches that distinguish between the variant allele or haplotype and the other alleles or haplotypes are preferably located in the center of an allele-specific oligonucleotide primer to be used in allele-specific oligonucleotide hybridization. In contrast, an allele-specific oligonucleotide primer to be used in PCR amplification preferably contains the one or more nucleotide mismatches that distinguish between the variant allele or haplotype and the other alleles at the 3′ end of the primer.
A heteroduplex mobility assay (HMA) is another well-known assay that may be used to detect a variant allele or haplotype. HMA is useful for detecting the presence of a polymorphic sequence since a DNA duplex carrying a mismatch has reduced mobility in a polyacrylamide gel compared to the mobility of a perfectly base-paired duplex (Delwart et al., Science 262:1257-1261 (1993); White et al., Genomics 12:301-306 (1992)).
The technique of single strand conformational, polymorphism (SSCP) also may be used to detect the presence or absence of a variant allele or haplotype (see Hayashi, K., Methods Applic. 1:34-38 (1991)). This technique can be used to detect mutations based on differences in the secondary structure of single-strand DNA that produce an altered electrophoretic mobility upon non-denaturing gel electrophoresis. Polymorphic fragments are detected by comparison of the electrophoretic pattern of the test fragment to corresponding standard fragments containing known alleles.
Denaturing gradient gel electrophoresis (DGGE) also may be used to detect a variant allele or haplotype. In DGGE, double-stranded DNA is electrophoresed in a gel containing an increasing concentration of denaturant; double-stranded fragments made up of mismatched alleles have segments that melt more rapidly, causing such fragments to migrate differently as compared to perfectly complementary sequences (Sheffield et al., “Identifying DNA Polymorphisms by Denaturing Gradient Gel Electrophoresis” in Innis et al., supra, 1990).
Other molecular methods useful for determining the presence or absence of a variant allele or haplotype are known in the art and useful in the methods of the invention. Other well-known approaches for determining the presence or absence of a variant allele or haplotype include automated sequencing and RNAase mismatch techniques (Winter et al., Proc. Natl. Acad. Sci. 82:7575-7579 (1985)). Furthermore, one skilled in the art understands that, where the presence or absence of multiple alleles or haplotypes is to be determined, individual alleles or haplotypes can be detected by any combination of molecular methods. See, in general, Birren et al. (Eds.) Genome Analysis: A Laboratory Manual Volume 1 (Analyzing DNA) New York, Cold Spring Harbor Laboratory Press (1997). In addition, one skilled in the art understands that multiple alleles can be detected in individual reactions or in a single reaction (a “multiplex” assay). In view of the above, one skilled in the art realizes that the methods of the present invention may be practiced using one or any combination of the well-known assays described above or another art-recognized genetic assay.
Gene Identification
Various embodiments of the present invention provide for a method of identifying genes/genetic loci associated with a condition, comprising: acquiring genetic data from samples of a cohort of the condition; performing a GLS transformation on the genetic data, thereby decorrelating the genetic data; conducting gene-based analysis on the GLS-transformed genetic data; and identifying genes/genetic loci associated with the condition. In various embodiments, the condition is IBD, CD, or UC, or a combination thereof. In some embodiments, the cohort comprises correlated subjects or family subjects. In other embodiments, the genetic data comprise SNP genotypes. In yet other embodiments, performing the GLS transformation comprises transforming the genetic data according to functions G=Σo−1/2, Gy=GXβ+Ge, {circumflex over (β)}GLS=(X′Σo−1X)−1X′Σo−1y, var({circumflex over (β)}GLS)=var((X′Σo−1X)−1X′Σo−1y)=(X′Σo−1X)−1, or a combination thereof.
In various embodiments, conducting gene-based analysis comprises applying a gene-based test based on the assumption of independent or uncorrelated subjects. In various embodiments, conducting gene-based analysis comprises applying C-alpha, SKAT, SKAT-CommonRare, CMC, WSS, Variable Threshold, or Comprehensive Approach, or a combination thereof.
Various embodiments of the present invention provide a method of identifying genes/genetic loci associated with a condition. The method comprises: acquiring genetic data from samples of a cohort of the condition; performing a GLS transformation on the genetic data, thereby decorrelating the genetic data; conducting gene-based analysis on the GLS-transformed genetic data; and identifying genes/genetic loci associated with the condition. In various embodiments, the condition is IBD, CD, or UC, or a combination thereof.
In various embodiments, the cohort comprises correlated subjects or family subjects. In some embodiments, the cohort comprises cases subjects diagnosed with the condition. In some embodiments, the cohort comprises controls subjects who are healthy or not diagnosed with the condition. In various embodiments, the genetic data comprise SNP genotypes.
In various embodiments, performing the GLS transformation comprises transforming the genetic data according to functions (5)-(8), described above. In various embodiments, conducting gene-based analysis comprises applying a gene-based test based on the assumption of independent or uncorrelated subjects. In various embodiments, conducting gene-based analysis comprises applying C-alpha, SKAT, SKAT-CommonRare, CMC, WSS, Variable Threshold, or Comprehensive Approach, or a combination thereof.
Kits of the Invention
Various embodiments of the present invention also provide a kit. The kit may consist of or may consist essentially of or may comprise: one or more detection agents for detecting one or more alleles at one or more genes/genetic loci; instructions of using the agent to identify genes/genetic loci associated with a condition, and/or to prognose low or high probability of developing IBD, and/or to prognose susceptibility to or protection against IBD, and/or to diagnose IBD, and/or to treat IBD, and/or to direct administering an IBD therapy. In some embodiments, the one or more alleles are risk alleles associated with IBD.
Various embodiments of the present invention also provide a kit. The kit may consist of or may consist essentially of or may comprise: one or more detection agents for detecting one or more alleles at one or more genes/genetic loci; instructions of using the agent to identify genes/genetic loci associated with a condition. In various embodiments, the kit further comprises samples obtained from a cohort of the condition. In various embodiments, the condition is IBD, Crohn's disease (CD), or ulcerative colitis (UC).
Various embodiments of the present invention also provide a kit. The kit may consist of or may consist essentially of or may comprise: one or more detection agents for detecting one or more risk alleles at one or more genes/genetic loci; instructions of using the agent to prognose low or high probability of developing IBD, and/or to prognose susceptibility to or protection against IBD, and/or to diagnose IBD, and/or to treat IBD, and/or to direct administering an IBD therapy. In various embodiments, the risk alleles are associated with IBD. In various embodiments, the kit further comprises a sample obtained from a subject who desires prognosis, and/or diagnosis, and/or treatment of IBD. In various embodiments, the IBD is Crohn's disease (CD) or ulcerative colitis (UC).
In various embodiments, the one or more genes/genetic loci comprise 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or more, or all of the genes/genetic loci listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the one or more genes/genetic loci comprise SLC26A4, DLG4, GIPR, ZHX3, TNRC6B, CDK6, PRR5L, WNT2B, LRRC16A, HIST1 cluster (all Histone cluster 1 genes), GTF2IRD2B, ETS1, SLC5A1, or TET2, or a combination thereof. In various embodiments, the one or more genes/genetic loci comprises ETS1, HIST1 cluster (all Histone cluster 1 genes), CDK6, LRRC16A, or a combination thereof. In various embodiments, the gene/genetic locus comprises ETS1. In various embodiments, the gene/genetic locus comprises HIST1 cluster (all Histone cluster 1 genes). In various embodiments, the gene/genetic locus comprises CDK6. In various embodiments, the gene/genetic locus comprises LRRC16A.
In various embodiments, the kit further comprises an IBD therapy. Examples of the IBD therapy including but are not limited to anti-TNF therapy and anti-TL1A therapy. In some embodiments, the IBD therapy is an anti-TNF antibody. In some embodiments, the IBD therapy is an anti-TL1A antibody.
The kit is an assemblage of materials or components, including at least one of the inventive elements or modules. In various embodiments, the one or more detection agents specifically bind to one or more SNP's alleles. In some embodiments, the one or more SNP's alleles can be major alleles, minor alleles, or both. In some embodiments, the one or more SNP's alleles can be risk alleles, non-risk alleles, or protection alleles, or a combination thereof.
In some embodiments, the one or more detection agents specifically bind to one or more risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In some embodiments, the one or more detection agents specifically bind to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more, or all of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the one or more detection agents specifically bind to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 99, or 100, or more, or all of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In some embodiments, the one or more detection agents specifically bind to N of the risk alleles listed in Table 1, and wherein N is a positive integer not more than 341 (i.e., 1≤N≤341). In various embodiments, the one or more detection agents specifically bind to 1-5, 5-10, 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65, 65-70, 70-75, 75-80, 80-85, 85-90, 90-95, or 95-100 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the one or more detection agents specifically bind to 100-105, 105-110, 110-115, 115-120, 120-125, 125-130, 130-135, 135-140, 140-145, 145-150, 150-155, 155-160, 160-165, 165-170, 170-175, 175-180, 180-185, 185-190, 190-195, or 195-200 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the one or more detection agents specifically bind to 200-205, 205-210, 210-215, 215-220, 220-225, 325-230, 230-235, 235-240, 240-245, 245-250, 250-255, 255-260, 260-265, 265-270, 270-275, 275-280, 280-285, 285-290, 290-295, or 295-300 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341. In various embodiments, the one or more detection agents specifically bind to 300-305, 305-310, 310-315, 315-320, 320-325, 325-330, 330-335, 335-340, 340-341 of the risk alleles listed in Table 1 as SEQ ID NOs: 1-341.
In various embodiments, the one or more detection agents are applied to contact a biological sample obtained from the subject; and the level of binding between the one or more detection agents and the one or more alleles is detected. In some embodiments, the one or more detection agents are oligonucleotide probes, nucleic acids, DNAs, RNAs, peptides, proteins, antibodies, aptamers, or small molecules, or a combination thereof. In various embodiments, the level of binding is detected using a microarray. In some embodiments, the microarray is an oligonucleotide microarray, DNA microarray, cDNA microarrays, RNA microarray, peptide microarray, protein microarray, or antibody microarray, or a combination thereof.
In various embodiments, the one or detection agents are oligonucleotide probes specific to the one or more alleles. In various embodiments, the oligonucleotide probes are labeled with a fluorescent dye. In various embodiments, the oligonucleotide probes comprise reporter dyes and quencher dyes. In various embodiments, the kit further comprises a module configured to detecting fluorescence signal from the one or more detection agents. In various embodiments, the kit further comprises a module configured for conducting PCR amplification.
The exact nature of the components configured in the inventive kit depends on its intended purpose. Instructions for use may be included in the kit. “Instructions for use” typically include a tangible expression describing the technique to be employed in using the components of the kit to affect a desired outcome. Optionally, the kit also contains other useful components, such as, spray bottles or cans, diluents, buffers, pharmaceutically acceptable carriers, syringes, catheters, applicators (for example, applicators of cream, gel or lotion etc.), pipetting or measuring tools, bandaging materials or other useful paraphernalia as will be readily recognized by those of skill in the art.
The materials or components assembled in the kit can be provided to the practitioner stored in any convenient and suitable ways that preserve their operability and utility. For example, the detection agents can be in dissolved, dehydrated, or lyophilized form; they can be provided at room, refrigerated or frozen temperatures. The components are typically contained in suitable packaging material(s). As employed herein, the phrase “packaging material” refers to one or more physical structures used to house the contents of the kit, such as inventive compositions and the like. The packaging material is constructed by well-known methods, preferably to provide a sterile, contaminant-free environment. The packaging materials employed in the kit are those customarily utilized in assays and therapies. As used herein, the term “package” refers to a suitable solid matrix or material such as glass, plastic, paper, foil, and the like, capable of holding the individual kit components. Thus, for example, a package can be a glass vial used to contain suitable quantities of a composition as described herein. The packaging material generally has an external label which indicates the contents and/or purpose of the kit and/or its components.
Novel Genes/Regions, SNPs and Risk Alleles
Table 1 provides information of genes/regions, SNPs, SEQ ID NOs (SEQ ID NO: 1-341) and risk alleles in accordance with various embodiments of the present invention. “Dis” stands for disease; “gene.i” stands for gene ID; “SNP” stands for single nucleotide polymorphism; “rsID” stands for Reference SNP cluster ID (rs number); “chr” stands for chromosome; “pos_hg19” stands for position in human genome version 19; “pos_hg18” stands for position in human genome version 18; “A1” stands for minor allele; “A2” stands for major allele; “risk.allele” stands for the allele that leads to increased disease risk; “OR.risk.allele” stands for Odds Ratio in meta-analysis for the risk allele; “F_A_cedars” stands for minor allele frequency in Cedars affected cases; “F_U_cedars” stands for minor allele frequency in Cedars unaffected controls; “OR_cedars” stands for Odds Ratio in Cedars cohort; “SE_cedars” stands for Standard Error for log(OR) in Cedars cohort; “L95_cedars” stands for lower boundary of 95% Confidence Interval of OR in Cedars cohort; “U95_cedars” stands for upper boundary of 95% Confidence Interval of OR in Cedars cohort; “STAT_cedars” stands for test statistics (Z-value) in Cedars cohort; “P_cedars” stands for P-value in Cedars cohort; “F_A_iibdgc” stands for minor allele frequency in IIBDGC affected cases; “F_U_iibdgc” stands for minor allele frequency in IIBDGC unaffected controls; “OR_iibdgc” stands for Odds Ratio in IIBDGC cohort; “SE_iibdgc” stands for Standard Error for log(OR) in IIBDGC cohort; “L95_iibdgc” stands for lower boundary of 95% Confidence Interval of OR in IIBDGC cohort; “U95_iibdgc” stands for upper boundary of 95% Confidence Interval of OR in IIBDGC cohort; “STAT_iibdgc” stands for test statistics (Z statistics) in IIBDGC cohort; “P_iibdgc” stands for P-value in IIBDGC cohort; “beta_meta_fixed” stands for log(OR) in meta-analysis; “se_meta_fixed” stands for Standard Error of log(OR) in meta-analysis; and “P_meta_fixed” stands for P-value in meta-analysis.
Many variations and alternative elements have been disclosed in embodiments of the present invention. Still further variations and alternate elements will be apparent to one of skill in the art. Among these variations, without limitation, are the selection of constituent modules for the inventive methods, compositions, kits, and systems, and the various conditions, diseases, and disorders that may be diagnosed, prognosed or treated therewith. Various embodiments of the invention can specifically include or exclude any of these variations or elements.
In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.
The invention will be further explained by the following Examples, which are intended to be purely exemplary of the invention, and should not be considered as limiting the invention in any way. The following examples are provided to better illustrate the claimed invention and are not to be interpreted as limiting the scope of the invention. To the extent that specific materials are mentioned, it is merely for purposes of illustration and is not intended to limit the invention. One skilled in the art may develop equivalent means or reactants without the exercise of inventive capacity and without departing from the scope of the invention.
Gene-based analysis can be important in identifying novel loci for complex diseases. However most of the available approaches are based on independent assumption, aiming at population based case-control sample. Here we proposed a generalized least square (GLS) based analysis strategy to identify genes using data with complex family structures. Rational of this approach can be described as following.
Given a linear specification of the association of a set of genetic factors X and the outcome y, we have:
y=Xβ+e (1)
Suppose that the variance of outcome y can be written as:
var(y)=Σo (2)
When the subjects in the sample are uncorrelated, the estimate of β can be written as:
{circumflex over (β)}T=(X′X)−1X′y (3)({circumflex over (β)}T)={circumflex over (σ)}T2(X′X)−1. (4)
When the samples are correlated, e.g. in family-based samples, the ordinary least squares (OLS) estimate of β will be problematic and will lead to a biased estimate of ({circumflex over (β)}T). This will affect any model based on independent assumption, including most gene-based tests.
One of the solutions to the violation of independence assumption in linear model is to perform the generalized least square transformation. Let:
G==Σo−1/2 (5)
And a GLS transformed model can be written as:
Gy=GXβ+Ge (6)
And estimate based on the transformed model can be written as:
{circumflex over (β)}GLS=(X′Σo−1X)−1X′Σo−1y (7)
var({circumflex over (β)}GLS)=var((X′Σo−1X)−1X′Σo−1y)=(X′Σo−1X)−1 (8)
Clearly this is Best Linear Unbiased Predictor (BLUP) by construction. In other words, after the GLS transformation the data is de-correlated while retaining an unbiased estimator. Thereby any model developed with independence assumption can be applied to the GLS transformed data. Here for gene-based analysis, we choose to apply SKAT-CommonRare in the GLS transformed data as it has better performance in most scenarios while the independence assumption holds. The transformation matrix G was calculated as the inverse of the decomposition of the kinship matrix. We call this approach GLS-SKAT.
Single-SNP based association drives most GWAS findings mostly because it's simple and straightforward (
Gene-based analysis examines a gene as a whole instead of looking at single SNPs (
Current approaches for gene-based analysis include data collapsing approaches (e.g., Combining Multivariate and Collapsing approach (CMC), Weighted Sum Statistics (WSS), variable threshold, and comprehensive approach) and distribution based approaches (e.g., C-alpha, SNP Set Kernel Association Test (SKAT), and SKAT-CommonRare. Most of these approaches can only be applied to population-based design, assuming independence of the subjects.
The present invention provides a new approach GLS-SKAT for gene-based analysis in families. Considering the following linear model:
For independent subjects:
ε˜MVN(0,τ2I)
For correlated subjects:
ε˜MVN(0,τ2Σ)
To transform the correlated data to independent, we let:
UU′=Σ;T=U−1
So we can multiply T in the linear model:
Then,
var(Tε)=τ2TUU′T′=τ2I
That is, the correlated data are now “de-correlated”.
OLS estimate with the GLS transformed data:
βGLS=(G′T′TG)−1G′T′TY=(G′Y′G)−1G′Σ−1Y
var(βGLS)=(G′Σ−1G)−1
This is exactly the maximal likelihood estimate of the true model:
Y˜N(Gβ,Σ)
GLS-SKAT is applied to iChip data Cedars vs. BBC: 4600 cases and 6800 controls. SKAT-CommonRare is applied to IIBDGC (excluding Cedars and BBC samples): 30200 cases and 29700 controls. PCA is included to control for confounding factors. Gene region is defined as 100 Kb up and downstream of each gene. Analysis is focused on IBD and genes with at least 2 SNPs (about 8000 genes). Thus, the significant threshold is 0.05/8000=6.25E-6. Fisher's combined P value is used for the meta-analysis of the gene-level p-value.
TET2 codes for Tet Methylcytosine Dioxygenase 2, is involved in Foxp3 demethylation to drive regulatory T Cell differentiation and maintain immune homeostasis.
LRRC16A (leucine rich repeat containing 16A) is a protein-coding gene. Diseases associated with LRRC16A include acute urate nephropathy. An important paralog of this gene is LRRC16B. LR16A_HUMAN Q5VZK9 binds CAPZA2 with high affinity and significantly decreases CAPZA2 affinity for actin barbed ends. It increases the rate of elongation from seeds in the presence of CAPZA2; however, it seems unable to nucleate filaments. It rapidly uncaps barbed ends capped by CAPZA2 and enhances barbed-end actin polymerization b similarity. It may control actin dynamics in lamellipodia, and is required for cell migration.
The whole HIST1 region has joint association. HIST1 cluster portion 1 (˜26.2M, first portion) and HIST1 cluster portion 2 (˜27.8 M, second portion). After combining the ˜1.6M (from 26.2 M to 27.8 M) into one big region, the overall region-based association P value is 1.64×107.
BTN3A1/A2/A3 is an interesting gene cluster. Butyrophilin, Subfamily 3; belong to the B7 family members and are expressed in various immune cells such as T and NK cells. BTN3/CD277 comprises three structurally related members, BTN3A1, BTN3A2 and BTN3A3. It plays a role in T-cell responses in the adaptive immune response, and inhibits the release of IFNG from activated T-cells. It plays an important role in human γδ T-cell antigenic activation. It has differential role for CD277 as a co-regulator of the immune signal in T and NK cells (see e.g., Messal N, Mamessier E, et al. Eur J Immunol. 2011 December; 41(12):3443-54). While T cells express all BTN3/CD277 transcripts, NK cells express mostly BTN3A2, which lacks the B30.2 intracellular domain. Furthermore, NKp30-induced cytokine production is decreased by the specific engagement of BTN3A2, but not by BTN3A1 triggering.
We identified fourteen novel loci via gene-based analysis of iChip data (
More than 200 genetic loci have been identified in Inflammatory Bowel Disease (IBD), mostly via single SNP analysis. In this study, we aim to utilize gene-based analysis, which combines signals from all the SNPs in a gene, to identify novel IBD loci that have been missed in single SNP analysis.
3312 IBD cases from Cedars-Sinai Medical Center and 7154 family and population-based controls with ImmunoChip data were included as the discovery cohort. Genes with gene-level p-value <0.05 were then replicated in IIBDGC (30179 cases and 29678 controls, with samples overlapped with the discovery stage excluded). SKAT-CommonRare was performed to evaluate the gene-level association. Fisher's combined p-value was calculated to combine p-value from the discovery and replication cohorts. Bonferroni Corrected significance threshold of 6.25E-6 was used for gene-based p-value to count for 7,924 genes with at least 2 SNPs on iChip.
In addition to the known IBD genes such as L23R and NOD2, we identified multiple novel genes associated with IBD. Those genes include: TET2 (Discovery p-value 0.019, replication p-value 2.82E-9, combined p-value 1.33E-9); LRRC16A (Discovery p-value 1.55E-6, replication p-value 3.43E-5, combined p-value 1.19E-8); and multiple genes in Histone Cluster 1 locus (e.g.: HIST1H4H, discovery p-value 2.89E-5, replication p-value 2.44E-4, combined p-value 4.24E-6; HIST1H1B. discovery p-value 1.45E-4, replication p-value 8.61E-5, combined p-value 2.41E-7). The SNPs of these genes are listed in Table 1.
Our Bioinformatics analysis indicates that top SNP (rs7752195) driving the LRRC16A signal is a strong expression quantitative trait locus (eQTL) (In seeQTL, p=5.96E-51; in SCANdb, p=8E-9; in GeneVar, p=0.0025) of BTN3A2, which plays an important role in regulating adaptive immune response. Moreover, the top gene identified in current study, TET2 which codes for translocation (Tet) methylcytosine dioxygenase 2, was reported to drive T cell differentiation via DNA demethylation of FOXP3. It has also been reported to mediate interleukin-6 (IL-6) transcription by regulation of chromatin structure.
Without being bound to any particular theory, novel loci identified via gene-based analysis in the current study strongly suggest that it is worthwhile to re-examine previous single-SNP based GWAS at gene level.
The various methods and techniques described above provide a number of ways to carry out the application. Of course, it is to be understood that not necessarily all objectives or advantages described can be achieved in accordance with any particular embodiment described herein. Thus, for example, those skilled in the art will recognize that the methods can be performed in a manner that achieves or optimizes one advantage or group of advantages as taught herein without necessarily achieving other objectives or advantages as taught or suggested herein. A variety of alternatives are mentioned herein. It is to be understood that some preferred embodiments specifically include one, another, or several features, while others specifically exclude one, another, or several features, while still others mitigate a particular feature by inclusion of one, another, or several advantageous features.
Furthermore, the skilled artisan will recognize the applicability of various features from different embodiments. Similarly, the various elements, features and steps discussed above, as well as other known equivalents for each such element, feature or step, can be employed in various combinations by one of ordinary skill in this art to perform methods in accordance with the principles described herein. Among the various elements, features, and steps some will be specifically included and others specifically excluded in diverse embodiments.
Although the application has been disclosed in the context of certain embodiments and examples, it will be understood by those skilled in the art that the embodiments of the application extend beyond the specifically disclosed embodiments to other alternative embodiments and/or uses and modifications and equivalents thereof.
Preferred embodiments of this application are described herein, including the best mode known to the inventors for carrying out the application. Variations on those preferred embodiments will become apparent to those of ordinary skill in the art upon reading the foregoing description. It is contemplated that skilled artisans can employ such variations as appropriate, and the application can be practiced otherwise than specifically described herein. Accordingly, many embodiments of this application include all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the application unless otherwise indicated herein or otherwise clearly contradicted by context.
All patents, patent applications, publications of patent applications, and other material, such as articles, books, specifications, publications, documents, things, and/or the like, referenced herein are hereby incorporated herein by this reference in their entirety for all purposes, excepting any prosecution file history associated with same, any of same that is inconsistent with or in conflict with the present document, or any of same that may have a limiting affect as to the broadest scope of the claims now or later associated with the present document. By way of example, should there be any inconsistency or conflict between the description, definition, and/or the use of a term associated with any of the incorporated material and that associated with the present document, the description, definition, and/or the use of the term in the present document shall prevail.
It is to be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the application. Other modifications that can be employed can be within the scope of the application. Thus, by way of example, but not of limitation, alternative configurations of the embodiments of the application can be utilized in accordance with the teachings herein. Accordingly, embodiments of the present application are not limited to that precisely as shown and described.
Various embodiments of the invention are described above in the Detailed Description. While these descriptions directly describe the above embodiments, it is understood that those skilled in the art may conceive modifications and/or variations to the specific embodiments shown and described herein. Any such modifications or variations that fall within the purview of this description are intended to be included therein as well. Unless specifically noted, it is the intention of the inventors that the words and phrases in the specification and claims be given the ordinary and accustomed meanings to those of ordinary skill in the applicable art(s).
The foregoing description of various embodiments of the invention known to the applicant at this time of filing the application has been presented and is intended for the purposes of illustration and description. The present description is not intended to be exhaustive nor limit the invention to the precise form disclosed and many modifications and variations are possible in the light of the above teachings. The embodiments described serve to explain the principles of the invention and its practical application and to enable others skilled in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed for carrying out the invention.
While particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that, based upon the teachings herein, changes and modifications may be made without departing from this invention and its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of this invention.
This application is a U.S. National Phase of International Application No. PCT/US2017/033625 filed May 19, 2017, which claims the benefit of U.S. Provisional Application Ser. No. 62/339,357 filed on May 20, 2016 which is incorporated by reference in its entirety.
This invention was made with government support under Grant Nos. DK108140 and DK062413 awarded by the National Institutes of Health. The government has certain rights in the invention.
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| WO2017/201461 | 11/23/2017 | WO | A |
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