Brain-Derived Neurotrophic Factor in Obesity and Brain Function

This study is currently recruiting participants.
Verified September 2013 by National Institutes of Health Clinical Center (CC)
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT01517048
First received: January 24, 2012
Last updated: March 14, 2014
Last verified: September 2013
  Purpose

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.

Condition
Obesity
Genetic Disorder
Mental Retardation
Developmental Delay

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Brain-Derived Neurotrophic Factor in Obesity and Neurocognitive Function

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Primary Outcome Measures:
  • Serum brain-derived neurotrophic factor concentration

Secondary Outcome Measures:
  • Body Composition, Cognitive Function

Estimated Enrollment: 490
Study Start Date: January 2012
Detailed Description:

Brain-derived neurotrophic factor (BDNF) is a protein that is important in nervous system development and function. BDNF also appears to function downstream of the leptin-melanocortin signaling pathway to control appetite. In both animals and humans, diminished BDNF function is associated with hyperphagia, obesity, and neurocognitive deficits. We propose to study BDNF in two hyperphagic disorders: Prader-Willi syndrome and MC4R function-altering mutations. We hypothesize that patients with PWS may have increased BDNF during infancy, followed by a decline in BDNF that precedes the onset of hyperphagia and persists after the onset of obesity. We hypothesize that patients with MC4R mutations will have decreased BDNF, the severity of which will be associated with the degree of MC4R functional loss caused by the specific mutation(s) in each individual. To test these hypotheses, we wish to conduct cross-sectional studies to evaluate serum BDNF concentrations, metabolism, body composition, and neurocognition in: subjects with PWS, subjects with MC4R mutations and control subjects matched for age, sex, race, and BMI. If alterations in BDNF are found to be associated with PWS and/or MC4R mutations, these investigations could lead to future studies of BDNF receptor agonists as mechanism-specific pharmacologic therapy for hyperphagia and obesity in PWS and MC4R mutations, or BDNF receptor antagonists for failure-to-thrive in neonatal PWS.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria
  • 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
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01517048

Contacts
Contact: Daniela P Reyes-Capo (301) 402-6762 daniela.reyes-capo@nih.gov
Contact: Joan C Han, M.D. (301) 435-7820 hanjo@mail.nih.gov

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Patient Recruitment and Public Liaison Office (PRPL)    800-411-1222 ext TTY8664111010    prpl@mail.cc.nih.gov   
Canada
University of Alberta Recruiting
Alberta, Canada
Sponsors and Collaborators
Investigators
Principal Investigator: Joan C Han, M.D. Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
  More Information

Additional Information:
Publications:
ClinicalTrials.gov Identifier: NCT01517048     History of Changes
Other Study ID Numbers: 120051, 12-CH-0051
Study First Received: January 24, 2012
Last Updated: March 14, 2014
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Body Composition
Obesity
Overweight
Energy Homeostasis
Nociception
Prader-Willi Syndrome
Genetic Disorder
Healthy Volunteer
HV

Additional relevant MeSH terms:
Mental Retardation
Genetic Diseases, Inborn
Obesity
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Mental Disorders Diagnosed in Childhood
Mental Disorders
Overnutrition
Nutrition Disorders
Overweight
Body Weight

ClinicalTrials.gov processed this record on April 23, 2014