In line with the stated goals of PA-14-047, midcareer investigator award in patient oriented research (parent K24), the goals of this application are to allow me to devote more time to augment my capabilities in Patient- Oriented Research (POR), with a focus on Alzheimer's disease (AD) biomarkers for use in AD risk factor and prevention research, and to provide mentoring to junior clinical investigators in the conduct of POR, with a focus on research in AD risk factors and prevention. Many studies have shown associations of diabetes with AD. However, whether diabetes causes AD neuropathology remains unclear. In order to answer this question I will begin a new R01 award (Diabetes Status and Brain Amyloid in Middle Aged Hispanics; 1R01AG050440- 01A1; 09/01/15-08/31/20) that will be funded shortly after the submission of this K24 application. This 5-year R01 project will conduct Amyloid ? (A?) positron emission tomography (PET) imaging with 18F-Florbetaben in 150 late middle-aged persons in order to examine in-vivo the cross-sectional and longitudinal association of diabetes status and glycemia with AD. I propose to complement the new R01 by adding plasma-based biomarkers, lipidomics, and by piloting Tau imaging to further the study of mechanisms linking diabetes to AD. The new R01 and the proposed K24 research project will be integrated with the proposed mentoring and raining program. The primary research aim of this award is to examine the association of soluble receptor of advanced glycosylation end-product (sRAGE) with plasma and brain cortical fibrillar Amyloid ? (A?). I will also examine whether these associations mediate the association of glycemia (examined continuously with HbA1c) and diabetes status (Normal glucose tolerance [NGT], pre-diabetes, diabetes), with brain A?. The secondary research aims are to explore the plasma lipidomic profile predictive of brain A? and whether this profile mediates the association of glycemia and diabetes status with brain A?, and to conduct a pilot study of tau imaging using 18F-THK-5351 PET comparing persons with NGT (n=5) and diabetes (n=5) to demonstrate feasibility in preparation for an independent grant application. The mentoring aims of the application are: 1) To train early investigators on POR in the cognitive complications of diabetes and related conditions, the potential mechanisms linking these conditions to AD, and methods to study these associations; 2) Mentees will have access to the training resources of the applicant related to lipidomics; 3) Early investigators will learn about the importance of tau as an AD mechanism, methods to ascertain it, and will have access to the training resources of the application. The training aims of the application are: 1) To trainin the potential application of blood based AD biomarkers to research in AD risk factors and prevention, with an initial focus on diabetes and related conditions; 2) To acquire new knowledge in lipidomics and how it can be applied to the study of risk factors for AD and its prevention and treatment (I will also seek training in genomics and proteonomics); 3) to learn the application of Tau imaging to research in risk factors for AD.

Public Health Relevance

The proposed research project will advance knowledge of Alzheimer's disease risk factors, indicate potential targets for intervention, and sustain the training of investigators that will help prevent and treat AD, in line with the goal of the Nationa Alzheimer's Project Act to effectively prevent and treat AD by 2025.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Midcareer Investigator Award in Patient-Oriented Research (K24)
Project #
5K24AG045334-02
Application #
9264448
Study Section
Neuroscience of Aging Review Committee (NIA)
Program Officer
Anderson, Dallas
Project Start
2016-05-01
Project End
2021-02-28
Budget Start
2017-03-15
Budget End
2018-02-28
Support Year
2
Fiscal Year
2017
Total Cost
Indirect Cost
Name
Columbia University (N.Y.)
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
621889815
City
New York
State
NY
Country
United States
Zip Code
10032
Ong, Kwok Leung; Morris, Margaret J; McClelland, Robyn L et al. (2018) Relationship of Lipids and Lipid-Lowering Medications With Cognitive Function: The Multi-Ethnic Study of Atherosclerosis. Am J Epidemiol 187:767-776
Fujiyoshi, Akira; Jacobs Jr, David R; Alonso, Alvaro et al. (2017) Validity of Death Certificate and Hospital Discharge ICD Codes for Dementia Diagnosis: The Multi-Ethnic Study of Atherosclerosis. Alzheimer Dis Assoc Disord 31:168-172
Gu, Yian; Vorburger, Robert; Scarmeas, Nikolaos et al. (2017) Circulating inflammatory biomarkers in relation to brain structural measurements in a non-demented elderly population. Brain Behav Immun 65:150-160
Luchsinger, José A; Ma, Yong; Christophi, Costas A et al. (2017) Metformin, Lifestyle Intervention, and Cognition in the Diabetes Prevention Program Outcomes Study. Diabetes Care 40:958-965
Golub, Justin S; Luchsinger, José A; Manly, Jennifer J et al. (2017) Observed Hearing Loss and Incident Dementia in a Multiethnic Cohort. J Am Geriatr Soc 65:1691-1697
Rapp, Stephen R; Luchsinger, Jose A; Baker, Laura D et al. (2017) Effect of a Long-Term Intensive Lifestyle Intervention on Cognitive Function: Action for Health in Diabetes Study. J Am Geriatr Soc 65:966-972
Reitz, Christiane; Guzman, Vanessa A; Narkhede, Atul et al. (2017) Relation of Dysglycemia to Structural Brain Changes in a Multiethnic Elderly Cohort. J Am Geriatr Soc 65:277-285
Fujiyoshi, Akira; Jacobs Jr, David R; Fitzpatrick, Annette L et al. (2017) Coronary Artery Calcium and Risk of Dementia in MESA (Multi-Ethnic Study of Atherosclerosis). Circ Cardiovasc Imaging 10:
Hughes, Timothy M; Craft, Suzanne; Baker, Laura D et al. (2017) Changes in metabolic risk factors over 10 years and their associations with late-life cognitive performance: The Multi-Ethnic Study of Atherosclerosis. Alzheimers Dement (Amst) 8:18-25
Gu, Yian; Vorburger, Robert S; Gazes, Yunglin et al. (2016) White matter integrity as a mediator in the relationship between dietary nutrients and cognition in the elderly. Ann Neurol 79:1014-25