Family Investigation of Nephropathy and Diabetes (F.I.N.D.)

Description

The Family Investigation of Nephropathy and Diabetes (FIND) is a multicenter study designed to identify genetic determinants of diabetic kidney disease. FIND will be conducted in eleven centers and in many ethnic groups throughout the United States. Two different strategies will be used to localize genes predisposing to kidney disease: a family-based genetic linkage study and a case-control study that utilizes admixture linkage disequilibrium. The center based at the Phoenix office of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK-Phoenix) will conduct family-based linkage studies among American Indian populations in the southwestern United States. Participants (index cases) with diabetes and kidney disease will initially be recruited, and their parents and siblings will also be invited to participate. Genetic material from these participants will be used to genotype markers throughout the genome. Linkage analysis will be conducted to identify particular chromosomal regions containing genes that influence susceptibility to diabetic kidney disease. Linkage analyses will also be used to identify genes influencing traits related to diabetic kidney disease, such as serum creatinine, urinary protein excretion, plasma glucose levels, blood pressure and blood lipid levels. Regions that show evidence for linkage will then be examined in more detail, with both genetic linkage and association studies, to attempt to identify the specific genes that influence diabetic kidney disease, or related traits. The identification of genes that influence susceptibility to diabetic kidney disease will lead to a better understanding of how kidney disease develops. In the long run, this may lead to improved treatment and prevention of diabetic kidney disease.

Conditions

Diabetic Nephropathy, Diabetes Mellitus, Diabetic Kidney Disease, Albuminuria

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Study Overview

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Study Details

Study overview

The Family Investigation of Nephropathy and Diabetes (FIND) is a multicenter study designed to identify genetic determinants of diabetic kidney disease. FIND will be conducted in eleven centers and in many ethnic groups throughout the United States. Two different strategies will be used to localize genes predisposing to kidney disease: a family-based genetic linkage study and a case-control study that utilizes admixture linkage disequilibrium. The center based at the Phoenix office of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK-Phoenix) will conduct family-based linkage studies among American Indian populations in the southwestern United States. Participants (index cases) with diabetes and kidney disease will initially be recruited, and their parents and siblings will also be invited to participate. Genetic material from these participants will be used to genotype markers throughout the genome. Linkage analysis will be conducted to identify particular chromosomal regions containing genes that influence susceptibility to diabetic kidney disease. Linkage analyses will also be used to identify genes influencing traits related to diabetic kidney disease, such as serum creatinine, urinary protein excretion, plasma glucose levels, blood pressure and blood lipid levels. Regions that show evidence for linkage will then be examined in more detail, with both genetic linkage and association studies, to attempt to identify the specific genes that influence diabetic kidney disease, or related traits. The identification of genes that influence susceptibility to diabetic kidney disease will lead to a better understanding of how kidney disease develops. In the long run, this may lead to improved treatment and prevention of diabetic kidney disease.

Family Investigation of Nephropathy and Diabetes (F.I.N.D.)

Family Investigation of Nephropathy and Diabetes (F.I.N.D.)

Condition
Diabetic Nephropathy
Intervention / Treatment

-

Contacts and Locations

Phoenix

NIDDK, Phoenix, Phoenix, Arizona, United States, 85014

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

For general information about clinical research, read Learn About Studies.

Eligibility Criteria

  • 1. Biopsy proven diabetic nephropathy (by medical record review):
  • 1. Nodular and/or diffuse increases in the mesangial matrix accumulation; and
  • 2. Thickened glomerular basement membranes and/or arteriolar hyalinization; and
  • 3. Absence of mesangial immunoglobulin or paraprotein deposits by immunoflorecscence microscopy, absence of amyloid deposits by Congo Red staining or electron microscopy, absence of electron dense deposits within the glomerular basement membrane or glomerular capillary subendothelial space; and
  • 4. Overt proteinuria, defined as ACR greater than or equal to 300 mg/g, urinary protein creatinine ratio greater than or equal to 0.5 g/g, urinary albumin excretion greater than or equal to 300 mg/24 hr, or urinary protein excretion greater than or equal to 0.5 g/24 hr.
  • 2. ESRD (including transplant) from presumed diabetic nephropathy:
  • 3. Patient with presumed diabetic nephropathy but not ESRD:
  • 1. The index case and both parents, or
  • 2. The index case and at least one other affected sibling who has diabetes and renal disease, or
  • 3. The index case and at least one unaffected sibling, defined as an individual who has had diabetes for at least 10 years and who has no renal disease (based on evidence obtained from the medical record and from the FIND examination.

Ages Eligible for Study

18 Years to 99 Years

Sexes Eligible for Study

ALL

Accepts Healthy Volunteers

Yes

Collaborators and Investigators

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK),

Robert L Hanson, M.D., PRINCIPAL_INVESTIGATOR, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Study Record Dates

N/A