Obesity Clinical Trial
Official title:
Brain-Derived Neurotrophic Factor in Obesity and Neurocognitive Function
Verified date | December 12, 2014 |
Source | National Institutes of Health Clinical Center (CC) |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
Background:
- Prader-Willi syndrome (PWS) and MC4R genetic mutations are two conditions that can cause
problems with appetite regulation. People with PWS often have behavior and thinking problems.
People with MC4R mutations may have problems with attention. These problems may be related to
Brain-Derived Neurotrophic Factor (BDNF), a protein that is important for brain development.
Researchers want to study people with PWS and MC4R mutations to see how BDNF is involved in
these conditions. Specifically, body weight and brain function will be studied, and compared
with healthy volunteers.
Objectives:
- To study how BDNF affects body weight and brain function in people with PWS and MC4R
mutations.
Eligibility:
- Individuals of any age who have Prader-Willi syndrome or MC4R genetic mutations.
- Healthy volunteers of any age to act as control participants.
Design:
- Participants will be screened with a medical history and physical exam. Height, weight,
and waist/hip circumferences will be measured. Blood samples will be taken for genetic
and other tests.
- Participants will fill out questionnaires about eating habits, pain perception, and
sleep behavior.
- Participants will keep a 3-day food diary to record all food and drinks eaten.
- Tests and questionnaires will be given to study thinking, speech, movement, behavior,
and mood. Some tests will be done on a computer; other tests will be on paper. Tests may
also involve performing tasks with blocks and other objects.
- Participants may have other tests as directed. These will include hot and cold
sensitivity tests, imaging studies like x-rays, and measurements of body fat and water
content.
- Treatment will not be provided as part of this study.
Status | Completed |
Enrollment | 93 |
Est. completion date | December 12, 2014 |
Est. primary completion date | |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | N/A to 99 Years |
Eligibility |
- INCLUSION CRITERIA: Subject Inclusion Criteria: 1. For PWS subjects: We will enroll 75 subjects of all ages who have diagnosis of PWS confirmed by chromosome analysis (i.e. interstitial deletion of paternally-derived chromosome 15q, uniparental maternal disomy or other chromosome 15 abnormalities). Our goal is to have 25 infants, 25 non-obese, and 25 obese subjects in order to assess the different phases associated with PWS. Subjects receiving growth hormone therapy may enroll if the dose has been stable for the preceding 6 months. 2. For MC4R subjects: We will screen up to 200 subjects for mutations of MC4R and enroll 50 subjects of all ages who have diagnosis of homozygous or heterozygous MC4R mutation confirmed by sequencing of the MC4R gene. Both functional-altering (N=25) and non-pathologic (N=25) mutations will be included. 3. For control subjects: We will enroll 125 subjects of all ages who match with PWS or MC4R subjects by age (plus-minus 10%), sex, race, and BMI percentile (plus-minus10%). EXCLUSION CRITERIA: Subject Exclusion Criteria: 1. For all subjects: 1. Pregnancy 2. Individuals who have, or whose parent or guardians have, current substance abuse or a psychiatric disorder or other condition which, in the opinion of the investigators, would impede competence or compliance or possibly hinder completion of the study 3. If age >12 months, greater than 2% body weight loss in preceding 6 months 4. Anorexiant or weight loss medication use in preceding 6 months 2. For control subjects: 1. Chronic medical conditions anticipated to affect results or impede study participation 2. Medication use will be reviewed on a case-by-case basis by the Principal Investigator to determine eligibility |
Country | Name | City | State |
---|---|---|---|
Canada | University of Alberta | Alberta | |
United States | National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda | Maryland |
Lead Sponsor | Collaborator |
---|---|
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) |
United States, Canada,
Cohen-Cory S, Kidane AH, Shirkey NJ, Marshak S. Brain-derived neurotrophic factor and the development of structural neuronal connectivity. Dev Neurobiol. 2010 Apr;70(5):271-88. doi: 10.1002/dneu.20774. Review. — View Citation
Wisse BE, Schwartz MW. The skinny on neurotrophins. Nat Neurosci. 2003 Jul;6(7):655-6. — View Citation
Xu B, Goulding EH, Zang K, Cepoi D, Cone RD, Jones KR, Tecott LH, Reichardt LF. Brain-derived neurotrophic factor regulates energy balance downstream of melanocortin-4 receptor. Nat Neurosci. 2003 Jul;6(7):736-42. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Serum brain-derived neurotrophic factor concentration | |||
Secondary | Body Composition, Cognitive Function |
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