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Protocol Details

Genetics of Obesity, Diabetes, and Heart Disease in African Diaspora Populations

This study is currently recruiting participants.

Summary | Eligibility | Citations | Contacts




Sponsoring Institute

National Human Genome Research Institute (NHGRI)

Recruitment Detail

Type: Enrolling by Invitation
Gender: Male & Female
Min Age: 18
Max Age: N/A

Referral Letter Required


Population Exclusion(s)

American Indian or Alaskan Native;
Hispanic or Latino;
Native Hawaiian/Pacific Islander

Special Instructions

Currently Not Provided


Heart Disease;

Recruitment Keyword(s)

African Descent;
Cardiovascular Disease;


Cardiovascular Disease

Investigational Drug(s)


Investigational Device(s)




Supporting Site

National Human Genome Research Institute


- African Americans have one of the highest rates of type 2 diabetes in the United States, and often have other medical problems related to obesity and cardiovascular disease. These conditions have various risk factors, including high blood sugar levels, high cholesterol levels, and insulin resistance. However, these risk factors have not been studied very closely in individuals with African ancestry, including Afro-Caribbean and sub-Saharan Africa migrant populations. Researchers are interested in conducting a genetic study on obesity, adult-onset diabetes, heart disease, and other common health conditions in individuals with African ancestry.


- To collect genetic and non-genetic information from individuals with African ancestry to study common health conditions related to obesity, adult-onset diabetes, and heart disease.


- Individuals at least 18 years of age who self-identify as African American, Afro-Caribbean, or migrants from sub Saharan Africa.


- Participants will undergo a physical examination and will provide a blood sample for study.

- Participants will also answer questions about personal and family medical history and current lifestyle behaviors.

- No treatment will be provided as part of this protocol.

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Subjects will include unrelated persons who self-identify as white or African American, Afro-Caribbean or migrant from sub-Saharan Africa. Adults of African ancestry are prioritized for this study because of the paucity of genetics studies investigating the association of risk alleles contributing to the prevalence of T2D, CVD, obesity and other common conditions in this population. A small proportion of whites (less than 10%) will be included in this study, as they are in Dr. Sumner s ongoing projects; they will have the same clinical measurements obtained in the same laboratory to serve as a comparison group.


Children are excluded as these phenotypes present more commonly in adults. Attempts will be made to enroll an equal number of men and women. No prisoners, pregnant women or fetuses will be included in this study.

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Li B, Leal SM. Methods for detecting associations with rare variants for common diseases: application to analysis of sequence data. Am J Hum Genet. 2008 Sep;83(3):311-21. Epub 2008 Aug 7.

Wolf SM, Lawrenz FP, Nelson CA, Kahn JP, Cho MK, Clayton EW, Fletcher JG, Georgieff MK, Hammerschmidt D, Hudson K, Illes J, Kapur V, Keane MA, Koenig BA, Leroy BS, McFarland EG, Paradise J, Parker LS, Terry SF, Van Ness B, Wilfond BS. Managing incidental findings in human subjects research: analysis and recommendations. J Law Med Ethics. 2008 Summer;36(2):219-48, 211.

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Principal Investigator

Referral Contact

For more information:

Charles N. Rotimi, M.D.
National Human Genome Research Institute (NHGRI)
National Institutes of Health
Building 12A
Room 4047
12 South Drive
Bethesda, Maryland 20892
(301) 451-2303

Shirley Freeman
National Human Genome Research Institute (NHGRI)
National Institutes of Health
Building 12A
Room 4047
12 South Drive
Bethesda, Maryland 20892
(301) 451-2302

Patient Recruitment and Public Liaison Office
Building 61
10 Cloister Court
Bethesda, Maryland 20892-4754
Toll Free: 1-800-411-1222
TTY: 301-594-9774 (local),1-866-411-1010 (toll free)
Fax: 301-480-9793

Clinical Trials Number:


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