Inherited and Environmental Risks Acting on Body Weight
Starting soon · Not applicable
Conditions studied: Genetics, Obesity
In brief
The goal of this research is to investigate genetic and environmental factors that contribute to obesity through brain inflammation. The main questions are 1) if identical twins, who differ in food consumption habits, have differences in adiposity markers and brain inflammation and 2) if signs of brain inflammation in response to a specific diet is modified by genetics.
Key facts
- Study ID
- NCT07430852
- Run by
- University of Washington
- People needed
- 110
- Starts
- 2026-09-01
- Expected to finish
- 2030-04-30
- Last updated by the study team
- 2026-02-24
Who can join
Age: 20 and older, up to 45. Sex: any. Healthy volunteers: accepted.
You may qualify if…
- Age 20-45 years
- Differs in habitual diet from co-twin (study 1).
- Willing to undergo 7-day overfeeding and hypocaloric feeding periods (study 2)
- Member of the Washington State Twin Registry
You may not qualify if…
- History of bariatric surgery or active participation in weight-loss program
- Major medical or neurological disorder (e.g., diabetes, multiple sclerosis)
- Known gallbladder disease, anemia, impaired thyroid, kidney or liver function or hypertriglyceridemia (>350 mg/dl) (study 2)
- Current use of weight-loss medications or other medications known to alter appetite (e.g., atypical anti-psychotics)
- High levels of vigorous physical activity (>300 min./week)
- Pregnancy, menopause, or breastfeeding
- Individuals with severe food allergies and dietary restrictions (e.g., vegan/vegetarian, gluten-free, others) (study 2)
- Co-twin unwilling or unable to participate
- MRI contraindication (e.g., implanted metal, claustrophobia)
- Lifetime eating disorder
- Current smoking or heavy alcohol use (≥ 2 drinks per day for females and ≥ 3 drinks per day for males)
- BMI > 45 kg/m2 (study 1)
- BMI > 35 kg/m2 (study 2)
- Weight > 350 pounds or determined to be safe by MRI tech (MRI limit)
- Inability to participate in a controlled diet program (study 2) or undergo other study procedures
- Non-English speaking-or-reading individuals
Where it is running
- University of Washington — Seattle, Washington, United States
Full record on ClinicalTrials.gov
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