Breast cancer is the most commonly diagnosed cancer in women worldwide. Although the intent of increased mammographic screening is early detection of invasive cancer, an unexpected consequence has been a substantial increase in the number of women diagnosed with ductal carcinoma in situ (DCIS). DCIS is considered a benign lesion that consists of non-invasive neoplastic cells. Although DCIS has been considered a precursor lesion to invasive breast cancers, only a small percentage of DCIS cases progress to invasive cancers. The most common treatment for DCIS is breast-conserving surgery followed by radiation. Recently, there has been considerable debate over the treatment of DCIS, with many claiming that current treatment regimens result in overtreatment of a mostly indolent disease.
While some groups recommend frequent follow up and monitoring of women with low-grade DCIS instead of invasive treatment, this approach would necessitate either frequent biopsy, an unattractive option for most women, or additional mammography. Additionally, for some women, mammography may be hard to interpret or may provide a false negative. In particular, dense stromal and epithelial tissue within the breast may cause high background and women with high breast density are more at risk for a false-negative mammogram. Likewise, certain forms of breast cancer such as triple-negative breast cancer (TNBC) are less likely to be detected by mammographic screening. Although TNBC may have larger size at diagnosis compared with other breast cancer subtypes, up to 18% of TNBCs remain unidentified on initial screening. This is due to the fact TNBC lacks the typical suspicious mammographic features of breast cancer, such as irregular mass shape, spiculated margins, associated ductal carcinoma in situ and suspicious calcifications. Thus mammography alone may be a suboptimal test for diagnosis of TNBC, especially for those at high risk.
In one aspect, the invention provides a method of determining breast cancer status of a subject, the method comprising:
determining a methylation state for each of a plurality of cytosine-guanine dinucleotide (CpG) sites in a sample obtained from the subject,
calculating a cancer presence differential methylation level and an invasiveness differential methylation level based on the methylation states of the plurality of CpG sites, and
comparing the cancer presence differential methylation level and the invasiveness differential methylation level to a predetermined cancer status reference level and a predetermined invasiveness reference level,
wherein when the cancer presence differential methylation level deviates from the predetermined cancer status reference level, the presence of breast cancer is indicated in the subject, and
when the invasiveness differential methylation level deviates from the predetermined invasiveness reference level, the presence of invasive breast cancer is indicated in the subject.
In another aspect, the invention provides a method of detecting breast cancer in a subject, the method comprising:
determining a methylation state for each of a plurality of cytosine-guanine dinucleotide (CpG) sites in a sample obtained from the subject,
calculating a cancer status differential methylation level based on the methylation states of the plurality of CpG sites, and
comparing the cancer status reference differential methylation level to a predetermined reference level,
wherein when the cancer status differential methylation level deviates from the predetermined reference level, the presence of breast cancer is indicated in the subject.
In another aspect, the invention provides a method of determining if breast cancer in a subject is invasive, or non-invasive, the method comprising:
determining a methylation state for each of a plurality of cytosine-guanine dinucleotide (CpG) sites in a sample obtained from the subject,
calculating an invasiveness differential methylation level based on the methylation states of the plurality of CpG sites, and
comparing the invasiveness differential methylation level to a predetermined reference level,
wherein when the differential methylation level deviates from the predetermined reference level, the breast cancer in the subject is invasive.
In various embodiments, the plurality of CpG sites comprises at least one selected from the CpG sites listed in Table 3 or Table 15.
In various embodiments, the plurality of CpG sites comprises at least five selected from the CpG sites listed in Table 21.
In various embodiments, the plurality of CpG sites comprises at least ten selected from the CpG sites listed in Table 3 or Table 15.
In various embodiments, the plurality of CpG sites comprises at least ten selected from the CpG sites listed in Table 21.
In various embodiments, the plurality of CpG sites comprises at least m % selected from the top n most predictive CpG sites listed in Table 3 and/or Table 15, wherein:
m is selected from the group consisting of: 50, 60, 70, 80, 90, 95, and 99; and
n is selected from the group consisting of 25, 50, 100, 500 and 1,000.
In various embodiments, the plurality of CpG sites comprises at least m % selected from the top n most predictive CpG sites listed in Table 21, wherein:
m is selected from the group consisting of: 50, 60, 70, 80, 90, 95, and 99; and
n is selected from the group consisting of 25, 50, 100, 500 and 1,000.
In various embodiments, the method further comprises providing treatment for breast cancer to the subject when breast cancer is indicated.
In various embodiments, the treatment for breast cancer comprises the administration of medication, radiation or surgery.
In various embodiments, calculating a differential methylation level comprises adding in a linear weighted summation values based on the methylation states of the plurality of CpG sites.
In various embodiments, the sample is a blood sample.
In various embodiments, the sample is tumor tissue.
In various embodiments, the subject has or is suspected to have ductal cell in situ carcinoma.
In various embodiments, the subject has or is suspected to have triple-negative breast cancer.
In various embodiments, the subject has or is suspected to have hormone receptor positive (ER+PR+) breast cancer.
In various embodiments, the subject has or is suspected to have HER2+ breast cancer.
In various embodiments, the subject is being monitored for the local or systemic recurrence of breast cancer.
In various embodiments, the plurality of CpG sites includes at least one selected from table 27.
For a fuller understanding of the nature and desired objects of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying figures.
The instant invention is most clearly understood with reference to the following definitions.
As used herein, the singular form “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.
Unless specifically stated or obvious from context, as used herein, the term “about” is understood as within a range of normal tolerance in the art, for example within 2 standard deviations of the mean. “About” can be understood as within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05%, or 0.01% of the stated value. Unless otherwise clear from context, all numerical values provided herein are modified by the term about.
As used herein, the term “breast cancer” refers to pre-malignant or malignant tumors that start in the epithelial cells of the breast. Breast cancer can be further defined into pathological subtypes based on expression of the estrogen, progesterone, and HER2 receptors. Additionally, breast cancer can be defined based on molecular subtype as defined, for example, by Peru et al, Nature. 2000 Aug. 17; 406(6797):747-5. Molecular subtypes include luminal A, B, and C, HER 2, basal-like, and normal type.
As used in the specification and claims, the terms “comprises,” “comprising,” “containing,” “having,” and the like can have the meaning ascribed to them in U.S. patent law and can mean “includes,” “including,” and the like.
As used herein, “cytosine-guanine dinucleotide site” or “CpG site” means a cytosine nucleotide followed by a guanine nucleotide in the genome of an organism. CpG sites can be designated with the number of the chromosome of the organism on which they are located and a number designating the position. The flanking sequences can be used to generate the position number. For example, “12.108079458” or “chr12 108079458” refer to a CpG site on chromosome 12 at position 108079458. The position number refers to the nucleotide index starting from 1 on the coding or plus (+) strand of the DNA molecule and specifically references the position of the 5′ cytosine in a CpG dinucleotide pair. In addition, this CpG location has a complementary sequence pair on the non-coding minus (−) strand and the position number also refers to that complementary strand cytosine which is located plus one nucleotide from the indicated coding strand position. Thus, for CpG 12.108079458, the methylation score values indexed to this specific site cover the cytosine on the coding strand of chromosome 12 at position number 108079458 and the cytosine on the non-coding strand of chromosome 12 at position number 108079459.
As used herein, the term “carcinoma in situ” refers to a neoplastic lesion characterized by increased epithelial proliferation, subtle to marked cellular atypia and an inherent but not necessarily obligate tendency for progression to invasive breast cancer as defined by Lakhani S, Ellis I, Schnitt S, et al. 4th. Lyon: IARC Press; 2012. WHO Classification of Tumours of the Breast. Lobular carcinoma in situ (LCIS) refers to a lesion originating from the terminal ductal lobular units, whereas, ductal carcinoma in situ (DCIS) refers to an intraductoral lesion. DCIS is also known as intraductal carcinoma, ductal intraepithelial neoplasia and includes the following subtypes cribiform, solid, comedo, papillary, and micropapilary. DCIS can also be characterized as low, moderate and high grade.
As used herein, the term “invasive breast cancer” means a malignant epithelial tumor of the breast, characterized by invasion of adjacent tissues and a marked tendency to metastasize to distant sites as defined by Lakhani S, Ellis I, Schnitt S, et al. 4th. Lyon: IARC Press; 2012. WHO Classification of Tumours of the Breast. As used herein, the term encompasses both cancer that presently exhibits these qualities and cancer that will develop them over the course of disease progression. Invasive breast cancer includes the following subtypes: invasive carcinoma of no special subtype, invasive carcinoma of mixed type, invasive ductal carcinoma, invasive lobular carcinoma, infiltrating carcinoma of the breast, tubular carcinoma, invasive cribriform carcinoma, carcinoma with medullary features, mucinous carcinoma, invasive papillary carcinoma, inflammatory breast cancer, Paget disease of the breast, metaplastic breast cancer, carcinomas with aprocrine differentiation, adenoid cystic carcinoma, microinvasive carcinoma, and carcinoma with neuroendrocrine features.
As used herein, “hormone receptor positive breast cancer” and “HER2+” mean cancers which have positive expression of estrogen or progesterone receptors in greater than 1-9% percent of cells. Hormone receptor positive tumors may or may not have overexpression of the HER2 receptor noted either by immunohistochemical or genetic evaluation.
As used herein, “methylation” or “methylated” as applied to CpG sites refers to the addition of a methyl group to cytosine, forming either 5′-methyl-cytosine or 5′-hydroxymethyl-cystosine.
As used herein, the term “percent methylation” or “% MET” refers to the frequency with which a particular set of CpG sites are methylated. Here, CpG methylation is expressed as a percentage of methylated copies found in the DNA sample for each individual CpG site relative to the total number of copies found for each site.
A “reference level” with respect to some measurement used in diagnosis is indicative of the presence or absence of a particular phenotype or characteristic. When the level of the measurement in a subject deviates from the reference level it is indicative of the presence of, or relatively heightened level of, a particular phenotype or characteristic.
As used herein, the term “triple negative breast cancer” means breast cancer in which less than 1-9% of cells express the estrogen or progesterone receptors and there is no alteration of the HER2 receptor noted either by immunohistochemical or genetic evaluation. The majority of triple negative breast cancer have gene expression profiles that are representative of the basal subtype of breast cancer.
Unless specifically stated or obvious from context, the term “or,” as used herein, is understood to be inclusive.
Ranges provided herein are understood to be shorthand for all of the values within the range. For example, a range of 1 to 50 is understood to include any number, combination of numbers, or sub-range from the group consisting 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, or 50 (as well as fractions thereof unless the context clearly dictates otherwise).
In one aspect, the invention provides a method of determining the breast cancer status of a subject by determining a methylation state for each of a plurality of cytosine-guanine dinucleotide (CpG) sites in a sample obtained from the subject, calculating a cancer status differential methylation level and an invasiveness differential methylation level based on the methylation states of the plurality of CpG sites, and comparing the cancer presence differential methylation level and the invasiveness differential methylation level to a predetermined cancer status reference level and a predetermined invasiveness reference level, wherein when the cancer status differential methylation level deviates from the predetermined cancer status reference level, the presence of breast cancer is indicated in the subject, and when the invasiveness differential methylation level deviates from the predetermined invasiveness reference level, the presence of invasive breast cancer is indicated in the subject. This aspect of the invention is based in part on the three-way analysis illustrated in
Aspects of the invention may be applied to determine if a patient is free from breast cancer, has DCIS or has invasive breast cancer. This may be achieved by determining if the patient's epigenetic profile, based on a plurality of CpG sites and expressed as a cancer presence differential methylation level and an invasiveness differential methylation level, deviates from the epigenetic profile of patients without breast cancer or with DCIS, expressed as a cancer presence reference level and invasiveness reference level. When the patient's cancer presence differential methylation level deviates from the cancer presence reference level, the presence of cancer (invasive or not) is indicated. When the patient's invasiveness differential methylation level, deviates from the invasiveness reference level, the presence of invasive breast cancer is indicated. In various embodiments, the subjects may have invasive breast cancer associated with carcinoma in situ. A person of skill in the art will appreciate that the methods of the invention may be used to detect this condition by calculating a carcinoma in situ differential methylation level based on a plurality of the CpG sites disclosed herein using the below described methods.
In another aspect, the invention provides a method of detecting breast cancer in a subject by determining a methylation state for each of a plurality of cytosine-guanine dinucleotide (CpG) sites in a sample obtained from the subject, calculating a cancer status differential methylation level based on the methylation states of the plurality of CpG sites, and comparing the cancer status differential methylation level to a predetermined cancer status reference level, wherein when the differential methylation level deviates from the predetermined cancer status reference level, the presence of breast cancer is indicated in the subject. The methods of the invention need not be applied to determine if the cancer is invasive. The method may also be applied to detect cancer by determining if the patient's epigenetic profile, based on a plurality of CpG sites and expressed as a cancer status differential methylation level, deviates from the epigenetic profile of patients without breast cancer, expressed as a cancer status reference level. When the patient's cancer status differential methylation level deviates from the cancer status reference level, the presence of breast cancer in the patient is indicated.
In another aspect, the invention provides a method of determining if breast cancer in a subject is invasive or non-invasive by determining a methylation state for each of a plurality of CpG sites in a sample obtained from the subject, calculating an invasiveness differential methylation level based on the methylation states of the plurality of CpG sites, and comparing the invasiveness differential methylation level to a predetermined reference level, wherein when the differential methylation level deviates from the predetermined reference level, the presence of breast cancer is indicated in the subject. This aspect of the invention is related to the DCIS vs. invasive analysis illustrated in
The methods of the invention may be applied to patients who have previously been diagnosed or are otherwise believed to have breast cancer, in order to determine whether or not the cancer is invasive. When the patient's invasiveness differential methylation level deviates from the invasiveness reference level, the presence of invasive breast cancer is indicated.
In another aspect, the invention provides a method of detecting local or systemic recurrence of breast cancer by determining a methylation state for each of a plurality of cytosine-guanine dinucleotide (CpG) sites in a sample obtained from the subject, calculating a cancer status differential methylation level and an invasiveness differential methylation level based on the methylation states of the plurality of CpG sites, and comparing the cancer presence differential methylation level and the invasiveness differential methylation level to a predetermined cancer status reference level and a predetermined invasiveness reference level, wherein when the cancer status differential methylation level deviates from the predetermined cancer status reference level, the recurrence of breast cancer is indicated in the subject, and when the invasiveness differential methylation level deviates from the predetermined invasiveness reference level, the recurrence of invasive breast cancer is indicated in the subject.
In various embodiments, the patient has or is suspected to have triple negative breast cancer. In various embodiments, the patient has or is suspected to have hormone receptor positive (ER+PR+, or ER+PR− or ER− PR+) breast cancer. In various embodiments, the patient has or is suspected to have HER2+ breast cancer.
The methylation of state of the plurality of CpG sites may be determined by any means known in the art. In various embodiments, the methylation state of the plurality of CpG sites may be determined by methyl-sensitive restriction enzyme digestion followed by Next-Gen Sequencing (NGS) on an appropriate instrument, or they may be determined by targeted qPCR assays to quantify cut and uncut CpG sites following methyl-sensitive restriction enzyme digestion, or they may be determined by bisulfite oxidation treatment with DNA sequencing (either direct or via NGS), or they may be determined by hybridization of labelled oligonucleotide probes (called “hybridization arrays”) to measure methylation following methyl-sensitive restriction enzyme digestion, or they may be determined by hybridization of anti-5′-methyl-cytosine antibodies to measure methylation after hybridization capture on a targeted gene panel.
Without wishing to be limited by theory, in various embodiments, the method relies on the concept of differential methylation level (ΔML)—site-specific differences in CpG methylation summed across a gene or genome domain, structure or element—in order to characterize functional shifts in methylation patterns. This method is illustrated in the example below and in Equation (1). In various embodiments, calculating a differential methylation level comprises adding in a linear weighted summation values based on the methylation states of the plurality of CpG sites.
As shown in
In various embodiments, the plurality of CpG sites includes a plurality of “up sites” and a plurality of “down sites”. Up sites are CpG sites where methylation at the site indicates an increased methylation load in patients in the first group in the comparison relative to patients in the second group in the comparison. Down sites are CpG sites where methylation at the site indicates a decreased methylation load in the first group in the comparison relative to patients in the second group in the comparison.
Various embodiments of the invention are directed to methods of examining sets of up sites and down sites and determining a differential methylation level based on their methylation state. Due to the predictive value of the plurality of sites, the scores will differ when examining patients with and without breast cancer and where the breast cancer is invasive or not.
The various reference levels in the above-described aspects may be calculated by determining the methylation state of a set of sites in patients who are known not to have breast cancer or are known to have DCIS, as appropriate for the respective embodiments. Accordingly, when a differential methylation level is determined using the same plurality of sites, deviation from the reference level indicates an additional evidentiary datum point supporting increasing the probability that the patient likely has breast cancer or invasive breast cancer.
A skilled person will understand that the specifics of the calculation used for generating a differential methylation level are not critical and various processes may be employed to generate these levels. All of them are within the scope of various embodiments of the invention.
Various embodiments of the invention rely on pluralities of CpG sites of various sizes. In various embodiments, the plurality of CpG sites may contain about 5, 10, 100, 1000, 5000 or more CpG sites.
Even among the CpG sites that have shown predictive power, different sites contribute different weightings to the overall predictive probability of the cancer status of a patient. Various embodiments of the invention calculate differential methylation levels based on various combinations of predictive CpG sites.
The predictive power of the sites may be quantified in various ways. As shown in
The predictive power of CpG sites may also be quantified based on P-value, adjusted for False Discovery Rate (FDR). Tables 8, 14, 20 and 26 list the top 40 CpG sites by P-value. In various embodiments, the plurality of CpG sites in any of the above aspects or embodiments may include one or more sites selected from the Tables below, in particular, those that rank CpG sites by their contribution to NMDS or by p-value. In some embodiments, the plurality of CpG sites may include the top n sites or m of the top n sites from these Tables or other ordinal lists (wherein m and n are positive integers). All of the CpG sites recited herein may in various embodiments be included in the calculation.
In various embodiments, the plurality of CpG sites may include sites within genes that are hypermethylated among patients with DCIS relative to patients without evidence of breast cancer. Table 11 lists CpG sites according to this metric. In various embodiments, the plurality of CpG sites may include sites within genes that are hypermethylated among patients with invasive breast cancer relative to patients without evidence of breast cancer. Tables 17 lists CpG sites according to this metric. In various embodiments, the plurality of CpG sites may include sites within genes that are hypermethylated among patients with invasive breast cancer relative to patients with DCIS. Table 23 lists CpG sites according to this metric.
In various embodiments, the tumor sample may be any sample obtained from the patient that contains sufficient DNA such that the methylation states of the various CpG sites may be determined. In various embodiments, the sample may be a blood, saliva or tissue sample. In various embodiments, the sample may contain tumor cells. In various embodiments the sample may be a tumor tissue sample. In various embodiments, the sample may comprise peripheral blood mononuclear cells (PBMCs). In various embodiments, the sample may be enriched to contain predominantly or substantially exclusively one type of cell or tissue, by way of non-limiting example the sample may be processed to contain predominantly or exclusively PBMCs.
In various embodiments, the method further includes providing treatment for breast cancer to patients in whom cancer is indicated. This treatment will vary for patients with DCIS or invasive breast cancer. The treatment may include any form of standard of care treatment for the form of cancer indicated accepted by the extended medical community. This includes but is not limited to hormonal therapy, targeted therapy, immunotherapy, chemotherapy, radiation or surgery. In various embodiments, the treatment may be Evista (Raloxifene Hydrochloride) Keoxifene (Raloxifene Hydrochloride), Raloxifene Hydrochloride, Abitrexate (Methotrexate), Abraxane (Paclitaxel Albumin-stabilized Nanoparticle Formulation), Ado-Trastuzumab Emtansine, Afinitor (Everolimus), Anastrozole, Aredia (Pamidronate Disodium), Arimidex (Anastrozole), Aromasin (Exemestane), Atezolizumab (Tecentriq) Capecitabine, Clafen (Cyclophosphamide), Cyclophosphamide, Cytoxan (Cyclophosphamide), Cisplatin, Carboplatin, Docetaxel, Doxorubicin Hydrochloride, Ellence (Epirubicin Hydrochloride), Epirubicin Hydrochloride, Eribulin Mesylate, Everolimus, Exemestane, 5-FU (Fluorouracil Injection), Fareston (Toremifene), Faslodex (Fulvestrant), Femara (Letrozole), Fluorouracil Injection, Folex (Methotrexate), Folex PFS (Methotrexate), Fulvestrant, Gemcitabine Hydrochloride, Gemzar (Gemcitabine Hydrochloride), Goserelin Acetate, Halaven (Eribulin Mesylate), Herceptin (Trastuzumab), Ibrance (Palbociclib), Ipilimumab (Yervoy), Ixabepilone, Ixempra (Ixabepilone), Kadcyla (Ado-Trastuzumab Emtansine), Kisqali (Ribociclib), Lapatinib Ditosylate, Letrozole, Megestrol Acetate, Methotrexate, Methotrexate LPF (Methotrexate), Mexate (Methotrexate), Mexate-AQ (Methotrexate), Neosar (Cyclophosphamide), Niraparib (Zejula), Nivolumab (Opdivo), Nolvadex (Tamoxifen Citrate), Olaparib (Lynparza), Paclitaxel, Paclitaxel Albumin-stabilized Nanoparticle Formulation, Palbociclib, Pamidronate Disodium, Perjeta (Pertuzumab), Pembrolizumab (Keytrundra), Pertuzumab, Ribociclib, Rucaparib (Rubraca), Tamoxifen Citrate, Taxol (Paclitaxel), Taxotere (Docetaxel), Thiotepa, Toremifene, Trastuzumab, Tykerb (Lapatinib Ditosylate), Velban (Vinblastine Sulfate), Velsar (Vinblastine Sulfate), Vinblastine Sulfate, Xeloda (Capecitabine), Zoladex (Goserelin Acetate) and the like. In various embodiments, where carcinoma in situ is indicated, the treatment may include monitoring or in some embodiments be limited to monitoring the benign lesion to ensure that it has not progressed to an invasive form.
The invention is further described in detail by reference to the following experimental example. This example is provided for purposes of illustration only, and is not intended to be limiting unless otherwise specified. Thus, the invention should in no way be construed as being limited to the following example, but rather, should be construed to encompass any and all variations which become evident as a result of the teaching provided herein.
In order to test the hypothesis that methylation changes in circulating lymphocytes could discriminate between women with different stages of breast cancer and women without cancer, a sensitive platform to identify changes in specific CpG profiles in blood cells that correspond to disease states in breast cancer was used. Discrimination of methylation profiles of peripheral blood mononuclear cells (PBMCs) from women with breast cancer and healthy women is evident.
Overall, at a functional level, patterns of differential methylation can be traced back to pathways and genes that support hypotheses about the potential role of DNA methylation in the altered immunological response to breast cancer. These methylation signals are evident in blood even though they convey a distinct tumor activity signature. Even with a small pilot cohort (8 normal, 6 DCIS and 8 invasive breast cancer samples) epigenetic profiles that discriminate between normal and tumor blood profiles were recovered. As expected, the distribution of signals in the tumor samples represent the complexity of the disease; however, the patterns in blood cells from healthy women are relatively overlapping
ΔML was calculated as the summation of the difference in % MET scores for each CpG site within the defined region or structure being scored, averaged by the number of CpG sites present:
where first and last CpG indexes are defined by the gene unit across which the summation score is being calculated. Thus, positive ΔML values indicate more methylation present in Grp1 and negative values indicate more methylation in Grp2.
The pairwise analysis in Table 1 provides a direct contrast and allows for several graphical visualization plots to be generated these are presented in
As described below in Example 2, a blind study was conducted. The CpG sites used in that analysis are listed in Table 27. In various embodiments, the plurality of CpG sites may include one or more of the sites listed in Table 27.
Table 1 summarizes the group comparisons and the samples associated with each group.
To test the prognostic ability of epigenetic analysis of circulating lymphocytes, a blinded study was executed with an additional 30 samples. It is a separate cohort than the existing cohort, but it is a replication of the cohort with an experimental design that allowed for blind testing. The goal of the classification test was to examine blood samples from patients recently diagnosed with DCIS and assess whether there was a DNA methylation signature that could be indicative of the risk that the observed breast tissue lesion would be likely to become invasive or remain a benign cell type. For comparison, risk was determined based on independent pathologic criteria determined on lesions after surgical resection. Samples were scored as low risk (Cribroform subtype, no necrosis, low mitotic index) or high risk (Comedo or solid subtype, high mitotic index, necrosis).
Nine out of the 10 blind samples were classified correctly in comparison to known pathologic criteria. To accomplish this, the control patients' and invasive patients' samples (blood DNA methylation profiles) were used to develop a discriminating classification routine. The herein disclosed methods were used to generate the statistical and algorithmic assets required to execute the classification calls on new, blind/unknown samples. The results are presented in
Rankings of Sites for the Control Vs. DCIS Analysis
Rankings of Sites for the Control Vs. Invasive Breast Cancer Analysis
Rankings of Sites for the DCIS Vs. Invasive Analysis
Although preferred embodiments of the invention have been described using specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.
The entire contents of all patents, published patent applications, and other references cited herein are hereby expressly incorporated herein in their entireties by reference.
The present application claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Patent Application No. 62/558,124, filed Sep. 13, 2017, which is incorporated herein by reference in its entirety.
Filing Document | Filing Date | Country | Kind |
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PCT/US2018/050651 | 9/12/2018 | WO | 00 |
Number | Date | Country | |
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62558124 | Sep 2017 | US |