Diabetes is a risk factor for cerebrovascular disease, cognitive impairment, and related dementia. Data derived from populations suggest that several comorbidities of diabetes increase the risk for cognitive impairment, structural brain changes associated with dementia as measured with magnetic resonance imaging (MRI), and dementia. The relationship between cerebrovascular disease and cognition, especially in diabetes remains understudied and poorly understood. Dementia due to cerebrovascular disease is often referred to as vascular dementia"""""""" or vascular cognitive impairment (VCI). Despite the high prevalence of VCI, the biological basis of this disease and its relationship with structural brain changes measured with MRI has been far less studied than Alzheimer's disease. A striking feature of VCI is that risk to date has been difficult to predict based on medical diagnosis alone. We hypothesize genetic factors are significant contributors to cerebrovascular disease and associated cognitive impairment in families enriched for type 2 diabetes. Further, the magnitude of these genetic factors can be measured, their interaction with environmental influences can be quantitated, and the chromosomal location of genes contributing to these traits can be mapped. These hypotheses will be tested in the Diabetes Heart Study (DHS) sample, an extensively characterized collection of families, by recruiting 1200 subjects from 500 families that previously participated in the DHS who will undergo cognitive testing and MRI brain scans. The relationships between MRI measures (white matter lesion score, diffusion anisotropy index, mean white matter perfusion, total brain volume, total white matter volume, total gray matter volume), cognitive ability, and extensive clinical measures available from the DHS will be evaluated to identify correlates of cerebrovascular disease and cognitive ability. The heritable component of cognition and MRI measures will be estimated and a comprehensive genetic analysis will be performed using preexisting genome scan data from the DHS to map regions that contain genes contributing to cognition and cerebrovascular disease. These studies will create unique data collection for genetic and other studies of cerebrovascular disease and cognition. This is a study of the genetics of MRI-derived measures of cerebrovascular disease and cognitive impairment in diabetes families. Successful completion of the study will create a unique database of information and provide insights into the genetic and lifestyle contributors to these disorders.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS058700-05
Application #
8242627
Study Section
Special Emphasis Panel (ZRG1-HOP-S (02))
Program Officer
Corriveau, Roderick A
Project Start
2008-04-01
Project End
2014-03-31
Budget Start
2012-04-01
Budget End
2014-03-31
Support Year
5
Fiscal Year
2012
Total Cost
$395,580
Indirect Cost
$128,296
Name
Wake Forest University Health Sciences
Department
Biochemistry
Type
Schools of Medicine
DUNS #
937727907
City
Winston-Salem
State
NC
Country
United States
Zip Code
27157
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Palmer Allred, Nicholette D; Raffield, Laura M; Hardy, Joycelyn C et al. (2016) APOE Genotypes Associate With Cognitive Performance but Not Cerebral Structure: Diabetes Heart Study MIND. Diabetes Care 39:2225-2231
Raffield, Laura M; Cox, Amanda J; Freedman, Barry I et al. (2016) Analysis of the relationships between type 2 diabetes status, glycemic control, and neuroimaging measures in the Diabetes Heart Study Mind. Acta Diabetol 53:439-47
Hsu, Fang-Chi; Yuan, Mingxia; Bowden, Donald W et al. (2016) Adiposity is inversely associated with hippocampal volume in African Americans and European Americans with diabetes. J Diabetes Complications 30:1506-1512
Adams, Jeremy N; Raffield, Laura M; Martelle, Susan E et al. (2016) Genetic analysis of advanced glycation end products in the DHS MIND study. Gene 584:173-9
Freedman, Barry I; Gadegbeku, Crystal A; Bryan, R Nick et al. (2016) APOL1 renal-risk variants associate with reduced cerebral white matter lesion volume and increased gray matter volume. Kidney Int 90:440-9
Adams, Jeremy N; Martelle, Susan E; Raffield, Laura M et al. (2016) Analysis of advanced glycation end products in the DHS Mind Study. J Diabetes Complications 30:262-8
Freedman, Barry I; Smith, Susan Carrie; Bagwell, Benjamin M et al. (2015) Electrochemical Skin Conductance in Diabetic Kidney Disease. Am J Nephrol 41:438-47
Hsu, Fang-Chi; Raffield, Laura M; Hugenschmidt, Christina E et al. (2015) Relationships between Cognitive Performance, Neuroimaging and Vascular Disease: The DHS-MIND Study. Neuroepidemiology 45:1-11

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