Regulation of FGF21 by Nutritional Challenges
Fasting, Non-alcoholic Fatty Liver Disease (NAFLD)
About this trial
This is an interventional other trial for Fasting focused on measuring Fasting, Fast, healthy, diet, study, manipulation, dietary, FGF21, Fibroblast growth factor, PTRF, Polymerase 1 and transcript release factor, adipose, fat, blood, inpatient, outpatient, NAFLD, metabolism
Eligibility Criteria
72-hour fast in healthy volunteers (Study Arm A):
Inclusion Criteria:
- Age 18-50 years
- Body Mass Index 21-26 kg/m^2
- Ability to give informed consent
- Ability to follow verbal and written instructions in English
Exclusion Criteria:
- Type 1 or Type 2 diabetes mellitus diagnosed according to the American Diabetes Association criteria
- Coronary heart disease (history of myocardial infarction, unstable angina pectoris, or congestive heart failure)
- Tobacco, marijuana, or intravenous drug use within 1 year of screening visit
- Recent weight change (>3 kg within 6 months of screening visit)
- Malignancy treated with chemotherapy within past 3 years
- History of depression, psychosis, or other psychiatric illness requiring hospitalization
- History of hyperthyroidism
- Renal insufficiency (creatinine clearance < 50 ml/min)
- Transaminases > 2X above the normal range
- Known liver disease
- Pregnancy within 12 months of screening visit
- Lactation within 12 months of screening visit
- Failure to use medically approved contraceptive methods (oral contraceptive, 2 barrier methods, surgical sterilization)
- History of an eating disorder (anorexia, bulimia, or laxative abuse)
- History of surgery for the treatment of obesity (gastric banding, gastric bypass, gastric stapling)
- New diagnosis of hypothyroidism within 1 year of screening visit or change in dose of thyroid hormone within 3 months of screening visit
- History of alcohol abuse within the past 3 years
- History of keloid formation
- History of allergy to lidocaine or marcaine
Use of plavix, coumadin, or heparin
72-hour fast or hypocaloric diet in subjects with non-alcoholic fatty liver disease (NAFLD) (Study Arms B & C):
Inclusion Criteria:
- Age 18-60
- BMI 25-45 kg/m^2
- Known nonalcoholic fatty liver disease based on liver biopsy
- Ability to give informed consent
- Ability to follow verbal and written instructions in English
Exclusion Criteria:
- Type I diabetes mellitus diagnosed according to the American Diabetes Association criteria or Type II diabetes mellitus with A1c > 7.5% or taking metformin or thiazolidinediones
- Coronary Heart Disease (history of myocardial infarction, unstable angina pectoris, or congestive heart failure)
- Uncontrolled hypertension (BP > 150/90 mmHg on or off antihypertensive medication)
- Tobacco, marijuana, or intravenous drug use within 1 year of screening visit
- Recent weight change (> 3 kg within 6 months of screening visit)
- Malignancy treated with chemotherapy within the past 3 years
- History of depression, psychosis, or other psychiatric illness requiring hospitalization
- History of hypo or hyperthyroidism
- Renal insufficiency (creatinine clearance < 50 ml/min)
- Pregnancy within 12 months of screening visit
- Lactation within 12 months of screening visit
- Failure to use medically approved contraceptive methods (oral contraceptive, 2 barrier methods, surgical sterilization)
- History of an eating disorder (anorexia, bulimia, or laxative abuse)
- History of surgery for the treatment of obesity (gastric banding, gastric bypass, gastric stapling)
- New diagnosis of hypo or hyperthyroidism within 1 year of screening visit or change in dose of thyroid hormone within 3 months of screening visit
- History of alcohol abuse within the past 3 years
- Cardiac pacemaker or aneurysm clips
- Metal implants in the body (pins, plates, shrapnel, intact bullets, IUD)
- Claustrophobia
Sites / Locations
- Beth Israel Deaconess Medical Center
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Experimental
Experimental
Fasting (Healthy).
Fasting (NAFLD)
Hypocaloric diet (NAFLD)
Oral carbohydrate challenge
Participants will fast for 72 hours during an inpatient stay at the Beth Israel Deaconess Medical Center in Boston, MA. Blood samples will be collected daily and two fat samples will be obtained by a trained surgeon. (We are no longer recruiting for Study Arm A).
Participants with liver-biopsy diagnosed non-alcoholic fatty liver disease (NAFLD) will fast for 72 hours during an inpatient stay at the Beth Israel Deaconess Medical Center in Boston, MA. Blood samples will be collected daily, and participants will have an MRI before and after the fast.
Participants will follow a low-calorie diet until they lose 3-5% of their body weight. Participants will have weekly outpatient visits at Beth Israel Deaconess Medical Center in Boston, MA for weight measurements. Participants will have blood drawn before and after the diet. Participants will also have an MRI before and after the diet.
Participants will fast for 16 hours overnight then ingest drinks containing fructose, glucose or a mixture of fructose and glucose. Blood will be drawn postprandially at specified timepoints for up to 5 hours