1. Patients with familial partial lipodystrophy of the Dunnigan variety with heterozygous disease-causing missense mutation in lamin A/C (LMNA) gene. 2. Hepatic steatosis (>5.6% hepatic triglyceride content) as demonstrated by 1H magnetic resonance spectroscopy. 3. Age 18-70 years. 4. Alcohol intake of less than 20 g per day in females and 30 g per day in males. 5. Participants and their partners with whom they are having sex, must use medically-acceptable birth control (contraceptives) during the study. Medically-acceptable methods of contraception include: (1) surgical sterilization, such as hysterectomy, tubal ligation or vasectomy. (2) approved hormonal contraceptives, such as birth control pills, patch or ring; Depo-Provera, Implanon. (3) barrier methods, such as condom, cervical cap or diaphragm used with a spermicide. (4) an intrauterine device (IUD). 1. Laboratory or other histologic findings highly suggestive of liver disease due to causes other than non-alcoholic steatohepatitis, such as chronic viral hepatitis, autoimmune hepatitis, primary biliary cirrhosis, biliary obstruction or genetic liver diseases such as Wilson's disease, hemochromatosis or alpha-1-antitrypsin deficiency. 2. Treatment with drugs associated with steatohepatitis, e.g., corticosteroids, high dose estrogens, methotrexate, amiodarone, tamoxifen, valproic acid, sulfasalazine, or oxacillin for more than 2 weeks in the 6 months prior to the study. 3. Decompensated liver disease as evidenced by clinical features of hepatic failure (variceal bleeding, ascites, hepatic encephalopathy etc.) and laboratory investigations (prolonged prothrombin time with INR > 1.3, hypoalbuminemia with serum albumin less than 3.0 g/dL, direct bilirubin > 1.3 mg/dL, or presence of esophageal varices etc.) 4. Evidence of hepatocellular carcinoma: alpha-fetoprotein levels greater than 200 ng/ml and/or liver mass on imaging study suggestive of liver cancer. 5. Use of drugs which can potentially decrease hepatic steatosis during previous 3 months; ursodeoxycholic acid, thiazolidinediones, high-dose vitamin E, betaine, acetylcysteine and choline. 6. Significant systemic or major illnesses other than liver disease, such as congestive heart failure, cerebrovascular disease, respiratory failure, renal failure (serum creatinine >2 mg/dL), acute pancreatitis, organ transplantation, serious psychiatric disease, and malignancy, that could interfere with the trial and adequate follow up. 7. Acute medical illnesses precluding participation in the studies. 8. Known HIV-infected patient. 9. Current substance abuse. 10. Pregnant or lactating woman. 11. Hematocrit of less than 30%. 12. History of weight loss during past 3 months. 13. Patients on bile acid binding resins, cholestyramine, colestipol or colesevelam. 14. Hypersensitivity or intolerance to OCA or any components of its formulation. 15. Failure to give informed consent 16 .Previous clinical diagnosis of diabetes mellitus or fasting blood glucose ≥ 126 mg/dL or hemoglobin A1c ≥ 6.5%.

CASES: Heavy drinkers with alcoholic hepatitis Inclusion criteria 1. A clinical diagnosis of alcoholic hepatitis 2. Serum total bilirubin >3 mg/dL 3. Subject or guardian ability to understand and willingness to provide written consent 4. Age greater or equal to 21 years 5. Re-enrolment of an alcoholic hepatitis donor is permissible up to 4 times if the donor presents with a new episode of alcoholic hepatitis 24 weeks or longer after the most recent enrolment in the study Exclusion criteria 1. Liver disease significantly caused by hemochromatosis, autoimmune liver disease, Wilson disease, NAFLD, and acute viral hepatitis 2. (NOTE: The presence of chronic hepatitis C, hepatitis B, or HIV is not exclusion to participation.)Pregnant or breast feeding Based on the judgment of the investigator, subject is not capable of understanding or complying with the study requirements. CONTROLS: Heavy drinkers without significant liver disease Inclusion criteria 1. History of chronic alcohol consumption sufficient to cause liver damage. Generally, this is considered to be >40 g/day or >280g/week on average for women and >60 g/day or >420 g/week on average for men, for many years (usually decades). Judgement about chronic alcohol consumption will be made by the site investigator. 2. Subject or guardian ability to understand and willingness to provide written consent 3. Age greater or equal to 21 years Exclusion criteria 1. Past evidence of alcoholic liver disease, defined as a bilirubin > 2.0 mg/dL, an AST > 1.5 ULN, and any hospital admission for liver disease, or the presence of esophageal varices or ascites (at any time in the past). 2. Liver disease significantly caused by hemochromatosis, autoimmune liver disease, Wilson disease, NAFLD, and acute viral hepatitis (NOTE: The presence of chronic hepatitis C, hepatitis B, or HIV is not exclusion to participation.) 3. Alcohol intake at less than 40 g/day or 280g/week on average for women and 60 g/day or 420 g/week on average for men for longer than the past 28 days 4. If liver stiffness has been assessed within the prior 90 days, then stiffness suggesting fibrosis of F1 or greater is excluded. For Fibroscan, this is a fibrosis score >7.0 kPa. 5. Pregnant or breast feeding 6. Any of the following laboratory abnormalities within 90 days prior to signing the consent. 1. Total bilirubin: >ULN* 2. INR: > 1.4 5 *Individuals with a diagnosis of Gilbert's can have total bilirubin up to 3.0 mg/dL and still be eligible for participation. Healthy Controls Inclusion criteria 1. AUDIT-C scores of <4 for men and <3 for women (signifying no alcohol misuse) 2. Abstinent (consumption of less than one standard drink/week) during the 6 months prior to enrolment 3. Ability to understand and willingness to provide written consent. Exclusion criteria 1. Clinical history or laboratory evidence of liver disease including alcoholic liver disease, NAFLD, hemochromatosis, alcoholic hepatitis, autoimmune liver disease, Wilson disease, hepatitis C, or hepatitis B. 2. Presence of diabetes (requiring treatment with oral agents or insulin). 3. Significant heart disease (prior history of heart disease, other than hypertension) 4. Chronic lung disease (requiring chronic treatment) 5. Immune related conditions (such as Crohn's disease, rheumatoid arthritis, ulcerative colitis, systemic lupus erythematosus, severe psoriasis, etc.) 6. Known infection with HIV 7. Presumed infection, or use of antibiotics or other medications (e.g., corticosteroids) that would affect immune function, within the past 14 days 8. BMI>35 9. Current or known history of cancer (except in situ carcinoma of the cervix or adequately treated basal or squamous cell carcinoma of the skin) within 5 years prior to enrollment 10. Pregnant or breast feeding 11. Any of the following laboratory abnormalities within 90 days prior to signing the consent. 1. Hemoglobin: <10 g/dL 2. Conjugated bilirubin: > ULN 3. INR: > 1.4 4. AST: >40 IU/mL 5. ALT: >40 IU/mL 12. Based on the judgment of the investigator, subject is not capable of complying with the study requirements

1. Ability to provide informed consent by subject or appropriate family member 2. Age between 21-70 years 3. Recent alcohol consumption > 50 g/d for > 6 months, continuing within two months before enrollment 4. At least 2 of the following symptoms or signs of acute alcoholic hepatitis: Anorexia, nausea, RUQ pain, jaundice, leukocytosis, hepatomegaly AND 5. Elevation of AST > 80 U/L, but < 500 U/L at the time of admission or within 3 days of baseline visit; AST > ALT and ALT < 200 U/L; total bilirubin > 3 mg/dL AND 6. Liver biopsy showing alcoholic hepatitis (steatohepatitis) OR ultrasound of liver showing increased echogenicity OR CT scan showing decreased attenuation of liver compared to spleen OR MRI showing fatty liver (decreased signaling intensity on T1 weighted images). If the liver biopsy (done within 60 days of inclusion) confirms diagnosis of AAH then inclusion e will be waived. 7. Model for End-Stage Liver Disease (MELD) <20 8. Willingness to utilize two reliable forms of contraception (both males and females of childbearing potential) from screening through the first six weeks of study. 1. Hypotension with BP < 80/50 after volume repletion 2. Pregnancy; incarceration; inability to provide consent or lack of appropriate family member 3. Signs of systemic infection: Fever > 38o C and positive blood or ascites cultures on appropriate antibiotic therapy for > 3 days within 3 days of inclusion 4. Acute gastrointestinal bleeding requiring > 2 units blood transfusion within the previous 4 days 5. Undue risk from immunosuppression: Positive HBsAg; a positive skin PPD skin test or history of treatment for tuberculosis; history of any malignancy including hepatocellular carcinoma; known HIV infection 6. Treatment with corticosteroids or other immunosuppressive medications including specific anti-TNF therapy (not including pentoxifylline), calcineurin inhibitors for > 3 days within the previous 3 months. 7. Evidence of acute pancreatitis: CT evidence and/or amylase or lipase > 5 X upper limit of normal 8. Serious cardiac, respiratory or neurologic disease or evidence of autoimmune hepatitis, primary biliary cirrhosis, primary sclerosing cholangitis, Wilsons disease, hemochromatosis, secondary iron overload due to chronic hemolysis, alpha-1-antitrypsin deficiency 9. Acute or chronic kidney injury with serum creatinine > 3.0 mg/dl

1. Ability to provide informed consent by subject or appropriate family member 2. Age between 21-70 years 3. Recent alcohol consumption > 50 g/d for > 6 months, continuing within two months before enrollment 4. d. At least 2 of the following symptoms of acute alcoholic hepatitis: Anorexia, nausea, RUQ pain 5. Liver biopsy showing alcoholic hepatitis (steatohepatitis) OR ultrasound of liver showing increased echogenicity OR CT scan showing decreased attenuation of liver compared to spleen OR MRI showing fatty liver (decreased signaling intensity on T1 weighted images) If liver biopsy confirms diagnosis of alcoholic hepatitis then requirement for AST elevation > 50 is waived. The liver biopsy must be done within 60 days of study enrollment. 6. AST levels:
• AST> Or equal to 50 IU/mL but less than 500 IU/mL
• AST> ALT, ratio AST/ALT> 1.5; ALT < 200 IU/mL
• or biopsy proven alcoholic hepatitis. 7. Model for End-Stage Liver Disease (MELD) ≥ 20 and Maddrey DF ≥ 32. 8. Willingness to utilize two reliable forms of contraception (both males and females of childbearing potential) from screening through the first 6 weeks of the study. 1. Hypotension with BP < 80/50 after volume repletion 2. Pregnancy; incarceration; inability to provide consent or lack of appropriate family member 3. Signs of uncontrolled systemic infection: Fever > 38°C and positive blood or ascites cultures and on appropriate antibiotic therapy for ≥ 3 days within 3 days of inclusion 4. Acute gastrointestinal bleeding requiring >2 units blood transfusion within the previous 4 days 5. Undue risk from immunosuppression: Positive HBsAg; a positive skin PPD skin test, a positive quantiferon, or history of treatment for tuberculosis; history of any malignancy except skin cancer but including hepatocellular carcinoma within the last five years; HIV infection 6. Recent previous treatment with corticosteroids or other immunosuppressive medications including specific anti-TNF therapy (not including pentoxifylline), calcineurin inhibitors within the previous 3 months. Treatment with corticosteroids for ≤3 days prior to baseline is acceptable. 7. Evidence of acute pancreatitis: CT evidence or amylase or lipase > 5 X upper limit of normal (ULN). 8. Serious cardiac, respiratory or neurologic disease or evidence of other liver diseases such as autoimmune hepatitis, primary biliary cirrhosis, primary sclerosing cholangitis, Wilson disease, hemochromatosis, secondary iron overload due to chronic hemolysis, alpha-1-antitrypsin deficiency 9. Acute or chronic kidney injury with serum creatinine > 3.0 mg/dl.