Patent Application
20240100001
The present disclosure provides a method for preventing, preventing progression and treating a fatty liver disease, comprising administering an effective amount of a pharmaceutical composition comprising a bitter receptor agonist comprising a denatonium salt, wherein the denatonium salt is selected from the group consisting of denatonium acetate (DA), denatonium citrate, denatonium maleate, denatonium saccharide, and denatonium tartrate; and wherein the daily dose of the denatonium salt for preventing or preventing progression of a fatty liver disease is from about 0.1 mg/kg/day to about 8 mg/kg/day and the daily dose of the denatonium salt for treating an existing fatty liver disease is from about 1 mg/kg/day to about 8 mg/kg/day, each administered QD, BID or TID.
Fatty liver disease is a term to describe a group of liver diseases including nonalcoholic steatohepatitis (NASH), alcoholic steatohepatitis (ASH), non-alcoholic fatty liver disease (NAFLD), and HIV-associated steatohepatitis, with or without liver fibrosis. Specifically, nonalcoholic steatohepatitis (NASH) is a common liver disease that is associated with increased morbidity and mortality. But there are no FDA-approved treatment options despite many compounds being tested in what are purported to be NASH treatment models. Non-alcoholic fatty liver disease (NAFLD) is a disorder affecting as many as 1 in 3-5 adults and 1 in 10 children in the United States. These are conditions where there is an accumulation of excess fat in the liver of people who drink little or no alcohol. The most common form of NAFLD is a non-serious condition called hepatic steatosis (fatty liver), in which fat accumulates in the liver cells: although this is not normal, by itself it probably does not damage the liver. NAFLD most often presents itself in individuals with a constellation of risk factors called the metabolic syndrome, which is characterized by elevated fasting plasma glucose (FPG) with or without intolerance to post-prandial glucose, being overweight or obese, high blood lipids such as cholesterol and triglycerides (TGs) and low high-density lipoprotein cholesterol (HDL-C) levels, and high blood pressure; but not all patients have all the manifestations of the metabolic syndrome. Obesity is thought to be the most common cause of NAFLD; and some experts estimate that about two-thirds of obese adults and one-half of obese children may have fatty liver. The majority of individuals with NAFLD have no symptoms and a normal physical examination (although the liver may be slightly enlarged); children may exhibit symptoms such as abdominal pain and fatigue, and may show patchy dark skin discoloration (acanthosis nigricans). The diagnosis of NAFLD is usually first suspected in an overweight or obese person who is found to have mild elevations in their liver blood tests during routine testing, though NAFLD can be present with normal liver blood tests, or incidentally detected on imaging investigations such as abdominal ultrasound or CT scan. It is confirmed by imaging studies, most commonly a liver ultrasound or magnetic resonance imaging (MRI), and exclusion of other causes.
Some people with NAFLD may develop a more serious condition called non-alcoholic steatohepatitis (NASH): about 2-5% of adult Americans and up to 20% of those who are obese may suffer from NASH. In NASH, fat accumulation in the liver is associated with inflammation and different degrees of scarring. NASH is a potentially serious condition that carries a substantial risk of progression to end-stage liver disease, cirrhosis and hepatocellular carcinoma. Some patients who develop cirrhosis are at risk of liver failure and may eventually require a liver transplant. Therefore, weight loss is a recommended means to prevent NASH or slow the progression of NASH. However, weight loss has not been shown to treat NASH once the liver fibrosis damage has occurred.
NAFLD may be differentiated from NASH by the NAFLD Activity Score (NAS), the sum of the histopathology scores of a liver biopsy for steatosis (0 to 3), lobular inflammation (0 to 2), and hepatocellular ballooning (0 to 2). A NAS of <3 corresponds to NAFLD, 3-4 corresponds to borderline NASH, and ≥5 corresponds to NASH. The biopsy is also scored for fibrosis (0 to 4).
NASH is a leading cause of end-stage liver disease.
There are no drugs currently approved to prevent or treat NAFLD or NASH. A number of pharmacological interventions have been tried in NAFLD/NASH but with overall limited benefit. Antioxidant agents may arrest lipid peroxidation and cytoprotective agents stabilize phospholipid membranes, but agents tried unsuccessfully or with only modest benefit so far include ursodeoxycholic acid, vitamins E (α-tocopherol) and C, and pentoxifylline. Weight-loss agents such as orlistat, have had no significant benefit compared to just the use of diet and exercise to achieve weight loss (“weight loss alone”). Many weight-loss studies in NAFLD/NASH have been pilot studies of short duration and limited success, reporting only a modest improvement in necroinflammation or fibrosis. A randomized, double-blind, placebo-controlled 6-month trial (Belfort, “A placebo-controlled trial of pioglitazone in subjects with nonalcoholic steatohepatitis”, N. Engl. J. Med., 355, 2297-2307 (2006)) of weight loss alone against pioglitazone, a thiazolidinedione peroxisome proliferator-activated receptor-γ (PPARγ) agonist and insulin sensitizer, failed to demonstrate any improvement for weight loss alone, but treatment with pioglitazone improved glycemic control, insulin sensitivity, indicators of systemic inflammation (including hsCRP, tumor necrosis factor-α, and transforming growth factor-β), and liver histology in patients with NASH and IGT or T2DM. Treatment with pioglitazone also ameliorated adipose, hepatic, and muscle IR, and was associated with an approximately 50% decrease in necroinflammation (p<0.002) and a 37% reduction in fibrosis (p=0.08). Improvement in hepatocellular injury and fibrosis has been reported in another controlled trial with pioglitazone of 12 months duration. In contrast, while the first randomized clinical study with rosiglitazone, the other thiazolidinedione approved for diabetes treatment, in NASH demonstrated a reduction in IR, plasma alanine aminotransferase (ALT) levels and steatosis, rosiglitazone treatment had no significant effect on necrosis, inflammation, or fibrosis. It is important to note with these results that even reduced ALT, insulin resistance and other diabetes indicators did not decreases liver fibrosis, which is a key indicator of NASH. Therefore, controlling diabetes is not enough to treat NASH or even prevent NASH. Moreover, there are severe safety limitations with both pioglitazone and Rosiglitazone. A preliminary report of the 2-year, open-label follow-up of this trial was also disappointing, with no significant benefit from rosiglitazone treatment. One pharmacological agent with some efficacy in NASH is pioglitazone. Unfortunately, pioglitazone is also associated with a significantly increased risk of weight gain, edema, congestive heart failure, and osteoporotic fractures in both women and men.
A phase 2 trial involving patients with NASH showed that treatment with daily subcutaneously-administered semaglutide (GLP-1 agonist) resulted in a higher percentage of patients with NASH resolution than placebo. However, the trial did not show a significant between-group difference in the percentage of patients with an improvement in fibrosis stage (Newsome et al., N. Engl. J. Med. “A Placebo-Controlled Trial of Subcutaneous Semaglutide in Nonalcoholic Steatohepatitis” Nov. 13, 2020). Unfortunately, “The percentage of patients in whom NASH resolution was achieved with no worsening of fibrosis was 40% in the 0.1-mg group, 36% in the 0.2-mg group, 59% in the 0.4-mg group, and 17% in the placebo group (P=0.48). The mean percent weight loss was 13% in the 0.4-mg group and 1% in the placebo group. The incidence of nausea, constipation, and vomiting was higher in the 0.4-mg group than in the placebo group (nausea, 42% vs. 11%; constipation, 22% vs. 12%; and vomiting, 15% vs. 2%). Malignant neoplasms were reported in 3 patients who received semaglutide (1%) and in no patients who received placebo. Overall, neoplasms (benign, malignant, or unspecified) were reported in 15% of the patients in the semaglutide groups and in 8% in the placebo group; no pattern of occurrence in specific organs was observed.” Accordingly, even GLP-1 agonists, such as semaglutide, are not benign treatments for NASH prevention or treatment to warrant the risk of long-term administration needed to treat, prevent or slow progression of NASH.
A summary of the clinical data obtained indicates that treatment of NASH seems to be uncoupled from weight loss as a treatment means, by any weight loss technique. Although weight loss may be an effective means for prevention of NASH or possibly showing progression of NASH. Therefore, there is a need for better accepted translational models to predict prevention, preventing progression and treatment of fatty liver diseases, including NASH. Therefore, there is a need for effective and safer NASH treatment options, particularly if a treatment can be delivered orally and not by injection. There is also a need for safe agents to prevent development of full NASH liver disease and damage and to show progression of NASH.
The present disclosure provides a method for preventing, preventing progression and/or treating a fatty liver disease, comprising administering an effective amount of a pharmaceutical composition comprising a bitter receptor agonist comprising a denatonium salt, wherein the denatonium salt is selected from the group consisting of denatonium acetate (DA), denatonium citrate, denatonium maleate, denatonium saccharide, and denatonium tartrate; and wherein the daily dose of the denatonium salt for preventing or preventing progression of a fatty liver disease is from about 0.1 mg/kg/day to about 8 mg/kg/day and the daily dose of the denatonium salt for treating an existing fatty liver disease is from about 1 mg/kg/day to about 8 mg/kg/day, each administered QD, BID, or TID.
More specifically, the present disclosure provides a method for preventing and preventing progression of fatty liver diseases selected from the group consisting of nonalcoholic steatohepatitis (NASH), alcoholic steatohepatitis (ASH), non-alcoholic fatty liver disease (NAFLD), and HIV-associated steatohepatitis, with or without liver fibrosis, comprising administering an effective amount of a pharmaceutical composition comprising a comprising a denatonium salt, wherein the denatonium salt is selected from the group consisting of denatonium acetate (DA), denatonium citrate, denatonium maleate, denatonium saccharide, and denatonium tartrate and wherein the daily dose of the denatonium salt for preventing or preventing progression of a fatty liver disease is from about 0.1 mg/kg/day to about 8 mg/kg/day QD, BID, or TID. Preferably, the pharmaceutical composition further comprises from about 0.5 g to about 5 g acetic acid. More preferably, the dosage per day of the acetic acid for an adult is from about 1.5 g to about 3 g.
The present disclosure provides a method for treating liver diseases selected from the group consisting of nonalcoholic steatohepatitis (NASH), alcoholic steatohepatitis (ASH), non-alcoholic fatty liver disease (NAFLD), and HIV-associated steatohepatitis, with or without liver fibrosis, comprising administering an effective amount of a pharmaceutical composition comprising a denatonium salt, wherein the denatonium salt is selected from the group consisting of denatonium acetate (DA), denatonium citrate, denatonium maleate, denatonium saccharide, and denatonium tartrate, and wherein the daily dose of the denatonium salt for treating an existing fatty liver disease is from about 1.0 mg/kg/day to about 8 mg/kg per day administered QD, BID, or TID. Preferably, the pharmaceutical composition further comprises from about 0.5 g to about 5 g acetic acid. More preferably, the dosage per day of the acetic acid for an adult is from about 1.5 g to about 3 g.
The present disclosure is based upon a first in vivo study (presented in Example 1) that was focused on fatty liver disease prevention, and then a second in vivo study (presented in Example 2) that was focused on fatty liver disease treatment. Together, these data from both studies provide surprising evidence that treatment with the denatonium salts, at different dosing frequencies and dose ranges, can provide both a fatty liver disease protective effect in susceptible individuals (such as Type 2 diabetics with a much higher risk of developing NASH) and a prevention of disease progression effect at lower, once daily oral dosing of the denatonium salts. And it required a higher and twice daily dosing of the denatonium salts to treat NASH in the in vivo model with similar effects as a GLP-1 agonist but without the known (in humans) severe side effects of semaglutide, a prototype marketed GLP-1 agonist.
A “fatty liver disease” means any of a group of diseases characterized by undesirable accumulation of fat in the liver, including nonalcoholic steatohepatitis (NASH), alcoholic steatohepatitis (ASH), non-alcoholic fatty liver disease (NAFLD), and HIV-associated steatohepatitis, with or without liver fibrosis.
A “therapeutically effective amount” of a denatonium salt means that amount which, when administered to a human for treating a fatty liver disease, such as NAFLD or NASH, is sufficient to effect treatment for the fatty liver disease. “Treating” or “treatment” of NAFLD or NASH in a human includes one or more of
“Or” is used in the inclusive sense (equivalent to “and/or”) unless the context requires otherwise.
As used herein, ranges and amounts can be expressed as “about” a particular value or range. About also includes the exact amount. Hence “about 5 mg” means “about 5 mg” and also “5 mg.” Generally, the term “about” includes an amount that would be expected to be within experimental error, such as for example, within 15%, 10%, or 5%.
Section headings are provided solely for the convenience of the reader and do not limit the disclosure.
The results of two in vivo murine studies in Examples 1 and 2, and the results of a first in human phase 1 clinical safety study have provided safe an effective dosage ranges for the denatonium salts of the present disclosure. Based on the conversion formula from mouse to human, the human equivalent dose to 50 mg/kg, BID in mice (the dose used for the treatment in vivo study in Example 2) is 4 mg/kg, BID (or 8 mg/kg/day). Considering the average adult body weight is 60 kg, the corresponding dose is 240 mg, BID (or 480 mg/day). In a first-in-human clinical trial, 240 mg, BID (480 mg/day) was well tolerated. Therefore, for treatment purposes, an upper daily dosage limit (human adult) 600 mg-1000 mg per day is safe and tolerated and lower daily doses have shown efficacy in the pre-clinical murine models provided herein.
Specifically, for treatment of a fatty liver disease, a daily adult human dose of a denatonium salt is from about 10 mg to about 600 mg or from about 0.2 mg/kg to about 10 mg/kg body weight per day. Most preferably, the denatonium salt for an adult is from about 40 mg to about 400 mg or from about 1 mg/kg to about 8 mg/kg body weight per day. The daily dose of the denatonium salt is administered once per day, twice per day, or three times per day. Most preferably, the daily dose of the denatonium salt is administered twice per day.
Specifically, for prevention of fatty liver disease, a daily adult human dose of a denatonium salt is from about 5 mg to about 400 mg or from about 0.1 mg/kg to about 8 mg/kg body weight per day. Most preferably, the denatonium salt for an adult is from about 20 mg to about 200 mg or from about 0.5 mg/kg to about 4 mg/kg body weight per day. The daily dose of the denatonium salt is administered once per day, twice per day, or three times per day. Most preferably, the daily dose of the denatonium salt is administered once per day.
To the extent any material incorporated by reference is inconsistent with the express content of this disclosure, the express content controls.
Denatonium acetate anhydrous, or DA is an anhydrous salt such that for every 100 mg of DA, there are 83 mg of denatonium cation, 17 mg of acetate anion.
This Scheme A describes the synthesis of denatonium acetate (DA).
Step 1: Synthesis of Denatonium Hydroxide from Lidocaine
To a reflux apparatus add 25 g of lidocaine, 60 ml of water and 17.5 g of benzyl chloride with stirring and heating in 70-90° C. The solution needs to be heated and stirred in the before given value for 24 h, the solution needs to be cooled down to 30° C. The unreacted reagents are removed with 3×10 mL of toluene. With stirring dissolve 65 g of sodium hydroxide into 65 mL of cold water and add it to the aqueous solution with stirring over the course of 3 h. Filter the mixture, wash with some water and dry in open air. Recrystallize in hot chloroform or hot ethanol.
Step 2: Preparation of Denatonium Acetate Anhydrous from Denatonium Hydroxide.
To a reflux apparatus 10 g of denatonium hydroxide (MW: 342.475 g/mol, 0.029 mol), 20 mL of acetone, and 2 g of acetic acid glacial (0.033 mol) dissolved in 15 mL of acetone is added, the mixture is stirred and heated to 35° C. for 3 h. Then evaporated to dryness and recrystallized in hot acetone.
This provides an immediate release 50 mg granule formulation of denatoniumn acetate (DA) as a free base as an immediate gastric release oral pharmaceutical formulation.
Table 1 shows qualitative and quantitative formulation composition of DA.
The detailed manufacturing steps are described below.
1. Drug Layering Process—Drug Layered Pellets
Drug layering process was performed in a Fluid bed granulator equipped with the rotor insert (rotor granulator). Drug solution was prepared by solubilizing Povidone K30 (Kollidon 30) and Denatonium Acetate in ethyl alcohol. The drug solution was sprayed tangentially on to the bed of sugar spheres (35/45 mesh) moving in a circular motion in the rotor granulator. The final drug loaded pellets were then dried for ten (10) minutes in the rotor granulator, discharged and screened through a #20 mesh.
2. Seal Coating Process—Seal Coated Pellets
Seal coating dispersion was prepared by separately dissolving Hypromellose E5 in a mixture (1:1) of ethyl alcohol and purified water until a clear solution was obtained. The remaining quantity of ethyl alcohol was then added to the above solution followed by talc. The dispersion was mixed for 20 minutes to allow for uniform dispersion of talc. The seal coating dispersion was sprayed tangentially on to the drug loaded pellets to achieve 5% weight gain. The seal coated pellets were then dried for five (5) minutes in the rotor granulator, discharged and dried further in a tray dryer/oven at 55° C. for 2 hours. The seal coated pellets were then screened through a #20 mesh.
3. Final Blending—Denatonium Immediate Release (IR) Pellets
The seal coated pellets were blended with talc screened through mesh #60 using a V-Blender for ten (10) minutes and discharged. The blended seal coated beads, Denatonium IR Pellets, were used for encapsulation.
4. Encapsulation—Denatonium Capsules, 50 mg
The Denatonium IR pellets, 50 mg, were filled into size 1, white opaque hard gelatin capsules using an auto capsule filling machine. Capsules were then passed through an in-line capsule polisher and metal detector. In-process controls for capsule weight and appearance was performed during the encapsulation process. Acceptable quality limit (AQL) sampling and testing was performed by Quality Assurance (QA) on a composite sample during the encapsulation process. Finished product composite sample was collected and analyzed as per specification for release testing.
5. Packaging—Capsules, 50 mg—30 Counts
The 50 mg capsules were packaged in 30 counts into 50/60 cc White HDPE round 5-line bottles with 33 mm White CRC Caps. The bottles were torqued and sealed using an induction sealer.
Table 2 shows a wide range of different results in widely different NASH in vivo models. This makes it difficult to do direct comparisons of the data. The study corresponding to the first row (called Aardvark Therapeutics) is provided in Example 1 below and the figures provided with this disclosure. It should be noted that unlike many prior art NASH models, the present disclosure did a much longer daily dosing of 48 weeks as it is estimated that at least 30 weeks of AMLN diet of time is needed to induce full fibrosis NASH in a mouse model. Many of the other studies were shorter in duration. Accordingly, the Example 1 study is more predictive of an effect for a method of prevention or slowing of progression of NASH and similar liver diseases characterized by liver fibrosis.
The studies that emphasized weight loss as a model for NASH treatment, seem to be more directed toward treating existing NASH conditions. Therefore, the present disclosure further incorporates by reference U.S. patent application Ser. No. 17/132,580 filed 23 Dec. 2020. In particular, Example 9 and the accompanying figures present the results of a weight loss study with a higher dose of DA (23.1 mg/kg BID corresponding to 46.2 15 mg/kg/day DA or 37.4 mg/kg/day dry denatonium) showing a significant reduction of weight gain. In contrast to the DIO shorter duration weight loss study with approximately double the daily dose of DA, the present NASH prevention study with a lower dose of DA showed no difference in weight gain from vehicle control over 48 weeks (
In a first aspect, the present disclosure provides a method (Method 1) for preventing or preventing progression of a fatty liver disease (e.g., nonalcoholic steatohepatitis (NASH), alcoholic steatohepatitis (ASH), non-alcoholic fatty liver disease (NAFLD), and HIV-associated steatohepatitis) with or without liver fibrosis, comprising administering an effective amount of a pharmaceutical composition comprising a comprising a denatonium salt, wherein the denatonium salt is selected from the group consisting of denatonium acetate (DA), denatonium citrate, denatonium maleate, denatonium saccharide, and denatonium tartrate and wherein the daily dose of the denatonium salt for preventing or preventing progression of a fatty liver disease is from about 0.1 mg/kg/day to about 8 mg/kg/day QD, BID or TID. Preferably, the pharmaceutical composition further comprises from about 0.5 g to about 5 g acetic acid. More preferably, the dosage per day of the acetic acid for an adult is from about 1.5 g to about 3 g.
The present disclosure further provides the following embodiments of the method for preventing or preventing progression of a fatty liver disease:
In a second aspect, the present disclosure provides a method (Method 2) for treating a fatty liver disease (e.g., nonalcoholic steatohepatitis (NASH), alcoholic steatohepatitis (ASH), non-alcoholic fatty liver disease (NAFLD), or HIV-associated steatohepatitis) with or without liver fibrosis, comprising administering an effective amount of a pharmaceutical composition comprising a denatonium salt, wherein the denatonium salt is selected from the group consisting of denatonium acetate (DA), denatonium citrate, denatonium maleate, denatonium saccharide, and denatonium tartrate, and wherein the daily dose of the denatonium salt for treating an existing fatty liver disease is from about 1.0 mg/kg/day to about 10 mg/kg/day administered QD, BID or TID. Preferably, the pharmaceutical composition further comprises from about 0.5 g to about 5 g acetic acid. More preferably, the dosage per day of the acetic acid for an adult is from about 1.5 g to about 3 g.
The present disclosure further provides the following embodiments of the method for treating a fatty liver disease:
On 29 Jan. 2021, the Food and Drug Administration (FDA) gave a short seminar on NASH with fibrosis how treatment drug candidates can show efficacy in animal models and clinical trials. The FDA confirmed that NASH (with fibrosis, hereinafter, NASH) is a serious condition and that a clinical use of surrogate endpoints can predict clinical benefit. Although in animal studies (such as provided in Example 1, herein) histopathological examination is a better proof of treatment, prevention and progression of disease benefit (depending on the length of the animal study). Therefore, in clinical trials, the FDA will accept surrogate endpoints and liver biopsy as means for showing clinical benefit (or lack thereof). The FDA recognized that NASH drug development challenges are due to a gradual and slow progression of chronic inflammatory changes in the liver, and that any NASH drug for prevention of full NASH (advanced liver fibrosis) or treatment or slowing progression are potential lifelong treatments. As for a surrogate endpoint, the FDA has suggested histopathology as “reasonably likely to predict clinical benefit.” The FDA indicated that NASH advanced liver “fibrosis stage, but no other histologic feature of steatohepatitis, has been associated independently with increased mortality, transplantation, and liver-related events.” (citing Angulo et al. Gastroenterology, 149:389-397, 2015).
In conducting clinical trials, the FDA suggests that early-stage trials use noninvasive disease-specific biomarkers (e.g., an aminotransferase), total bilirubin, and radiographic modalities (such as elastography, MRI-PDFF) to assess liver stiffness. For approvals, the FDA will accept improvement in liver histology. “Liver biopsy is a surrogate based on research demonstrating that improvement in histology is likely predictive of an improved clinical outcome in NASH patients.” Liver fibrosis is graded as stage 0 (none), stage, stage 2, stage 3 and stage 4 (cirrhosis). The NASH recommended endpoints are (1) resolution of steatohepatitis AND no worsening of liver fibrosis; OR (2) improvement in liver fibrosis AND no worsening of steatohepatitis; OR (3) both resolution of steatohepatitis and improvement in fibrosis.
This example provides the results of a 52 week study of lower dose DA (30 mg/kg per day QD by gavage) in mice where NASH conditions were induced by diet. The data for an animal-induced NASH of such a long duration (48-52 weeks) can be interpreted to support methods for preventing fatty liver diseases, including NASH, and methods of slowing progression of fatty liver diseases, including NASH. Male C57BL/6 mice (4 weeks old at study start) were maintained on a high-fat “Western diet” (AMLN diet) (DIO-NASH) (D09100301, Research Diet, USA) (40% fat (18% trans-fat), 40% carbohydrates (20% fructose) and 2% cholesterol, 40 kcal % fat, 20 kcal % fructose, and 2% cholesterol) following arrival, inducing non-alcoholic steatohepatitis (NASH). Following acclimation, Groups 1 and 2 (n=22 each) were dosed by intragastric oral gavage (PO) with (respectively) vehicle (distilled water) or denatonium acetate (DA) at 30 mg/kg. Doses were administered once daily (QD) for a full year (through Day 366) at dose volumes of 1 mL/kg. Body weights and clinical observations were monitored throughout the study. Blood was collected from fasted animals at baseline (Day −1) and regularly during the study (Weeks 4, 12, 24, and 48), processed to serum or plasma, and evaluated for metabolic parameters [glucose, insulin, hemoglobin A1c (HbA1c), and glucagon-like peptides 1 and 2 (GLP-1 and -2)], selected serum chemistry parameters [Ala aminotransferase (ALT), Asp aminotransferase (AST), albumin (ALB), and total bile acids (BA)], and multiple cytokines (32 total). After 52 weeks of QD dosing, fasted animals were bled and euthanized, and livers were collected and weighed. Terminal serum samples were assessed for low- and high-density cholesterol (LDL and HDL, respectively) and triglycerides (TGA); liver was assessed for total cholesterol (TC), TGA, and free fatty acids (FFA).
Three animals were found dead during the study, including one vehicle-dosed mouse (on Week 51) and two DA-dosed mice (one each on Weeks 12 and 49). None of these three animals exhibited clinical signs prior to being found dead, although one of the DA-dosed mortalities had shown decreasing body weight from Week 44 and the other DA-dosed mortality was notably heavier than the other animals from the study start. It was unclear if either of the Group-2 (DA-dosed) deaths were test article related. No other clinical observations were noted during the study interval.
For both groups, body weights exhibited a mean increase of approximately 200% (i.e., tripling in weight) from baseline during the year-long study. Notably, body weights (whether expressed as absolute or relative values) did not differ in a statistically significant manner between the two groups during the study, with the sole exception of relative body weights at the first time point (Day 4) after the start of dosing (when relative body weights were lower in the DA-dosed mice of Group 2).
For in-life blood samples, mice dosed with DA showed (compared to vehicle) significant differences as follows:
At necropsy after one year of QD dosing, relative (body weight-normalized) but not absolute liver weight was attenuated in the DA-treated mice (compared to vehicle-dosed animals).
Terminal blood samples revealed that serum TGA levels, were significantly attenuated in the DA-treated mice (compared to vehicle-dosed animals) after one year of daily dosing. In the necropsy liver samples, TGA levels, but not those of TC or FFA, were significantly attenuated in the DA-treated mice (compared to vehicle-dosed animals).
Thus, one year of DA dosing (30 mg/kg, PO, QD) of AMLN diet-induced NASH mice did not appear to have adverse effects on survival, body weight, or clinical signs. Compared to vehicle, DA resulted in significant changes in a number of metabolic parameters (fasting glucose, GLP-1, HbA1c, and insulin), serum chemistry (ALT, AST, and BA), and a subset of cytokines (IL-6, IL-9, IL-13, IP-10, KC, MIG, MIP-1α, and MIP-1B) at selected in-life time points. After one year of QD dosing, DA-dosed mice exhibited (compared to vehicle) attenuation of relative liver weight and of TGA levels in both serum and liver. Male C57BL/6 mice (n=44) were purchased from Taconic Biosciences, Inc. (Rensselaer, NY), as 4-week-old animals. Following arrival, animals were weighed using an electronic balance (Ohaus SCOUT® PRO, Parsippany, NJ), given a clinical examination to ensure that the mice were in good condition, and group-housed (up to 4 per cage). The animals were maintained in HEPA-filtered static cages using SaniChip bedding 7090A (Harlan Teklad, Hayward, CA). Animal room controls were set to maintain temperature and relative humidity at 22° C.±4° C. and 50% 20%, respectively. Housing rooms were on a 12:12 light/dark cycle. Animals were acclimated on site for at least 3 days prior to entry onto the study. Following arrival and throughout the study, mice were provided with ad libitum access to water (via water bottles) and (except as noted for fasting) to a high-fat “Western diet” (AMLN diet, No. D09100301; Research Diets, New Brunswick, NJ) containing 40 kcal % fat, 20 kcal % fructose, and 2% cholesterol.
DA was formulated at 30 mg/mL in DW. Solid DA was weighed and added to the appropriate volume of DW; the solution was mixed well and inspected visually to ensure that there was no precipitate and to verify that the test article was completely solubilized. The DA dosing solution was prepared freshly each week and stored refrigerated at 4° C. between use in daily dose administrations.
On Day −1 (i.e., one day before the start of dosing); and on Weeks 4, 12, 24, and 48 (i.e., after one, 3, 6, and 12 months of dosing), blood and fecal samples were collected from fasted animals.
On Day 366 (Week 52), fasted mice were weighed, subjected to terminal cardiocentesis and euthanized. Blood was processed to serum. Livers were excised, weighed, flash-frozen, and stored at −80° C.; remaining tissues were discarded. Serum was assessed for low- and high-density cholesterol (LDL and HDL, respectively) and triglycerides (TGA). Liver was assessed for total cholesterol (TC), TGA, and free fatty acids (FFA). Blood and liver parameters were measured using the kits and equipment indicated in Table 3.
For both groups, body weights exhibited a mean increase of approximately 200% (i.e., tripling in weight) from baseline during the year-long study, with the majority of this increase (˜ 150%) occurring during the first 5 months. Notably, body weights (whether expressed as absolute or relative values) did not differ in a statistically significant manner between the two groups during the study, with the sole exception of relative body weights at the first time point (Day 4) after the start of dosing (when relative body weights were lower in the DA-dosed mice of Group 2).
Mean values for cytokines with statistically significant differences between the groups (n=10) are plotted in
The conclusion of this study is that one year of DA dosing (30 mg/kg, PO, QD) of AMLN diet-induced NASH mice did not appear to have adverse effects on survival, body weight, or clinical signs. Compared to vehicle, DA resulted in significant changes in a small number of metabolic parameters (fasting glucose, GLP-1, HbA1c, and insulin), serum chemistry (ALT, AST, and BA), and a subset of cytokines (IL-6, IL-9, IL-13, IP-10, KC, MIG, MIP-1a, and MIP-1B) at selected in-life time points. After one year of QD dosing, DA-dosed mice exhibited (compared to vehicle) attenuation of relative liver weight and of TGA levels in both serum and liver.
In conclusion, this one year NASH study histopathology data in
This example provides the results obtained from a second in vivo mouse model of fatty liver disease treatment to investigate the therapeutic effect of DA on the treatment of NASH versus positive control semaglutide (a GLP-1 agonist marketed drug for lowering HbA1c). The differences in this study, from the preventive model in Example 1, were that a higher dose of DA (75 mg/kg) was used versus 30 mg/kg, dosing was twice daily (BID versus QD in the Example 1 study), a positive control semaglutide was used, a different mouse strain (B6 mice) was used, and the animals were already adults (23 weeks old in Example 2 versus 4 weeks old in Example 1) when the study began because the animals were already fed an AMLN diet for 17 weeks prior to the study being initiated. The study dose began at 75 mg/kg BID. However, after two weeks of dosing, it was found that this DA dose was not well tolerated, so it was lowered to 50 mg/kg BID for the remaining 10 weeks of dosing (a total of 12 weeks).
The study included 3 groups of 10 mice each, (A) vehicle control with distilled water by gavage BID, (B) DA by gavage BID, and (C) semaglutide 10 mmol/kg sc QD. Body weights and changes were measured 3× per week. Serum metabolic markers (blood glucose, blood insulin, HbA1c, HDL, LDL triglycerides and bile acids) were measured at beginning of dosing (baseline) and end of study. At the end of the study, histopathology of liver samples and serum levels of inflammatory biomarkers (IL-6, TNFα, CK-18 and TGF-β) were evaluated. Histopathology was performed blindly with a scoring scale according to NAFLD Activity Score and Fibrosis Score according to Table 4.
This application claims the benefit of priority of U.S. Provisional Patent Application No. 63/144,386, filed Feb. 1, 2021.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2022/014550 | 1/31/2022 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63144386 | Feb 2021 | US |
