This is a competing renewal application of R01-AG02745 to characterize memory related changes in functional magnetic resonance imaging (fMRI) activity over the course of mild cognitive impairment (MCI) due to Alzheimer's disease (AD). We have been very successful in accomplishing our Aims over the first funding cycle of this grant, recruiting over 140 older subjects and publishing over 40 scientific manuscripts in high impact journals. We have demonstrated a characteristic pattern of functional disruption in a distributed memory network that: 1) has good test-retest reproducibility;2) is associated with amyloid-? deposition as estimated with PiB-PET imaging;3) predicts rapid cognitive decline, and 4) remains dynamic over the course of MCI. The next phase of this R01 will build on our previous discoveries, and leverage our strong group of multi- disciplinary investigators, to translate our findings into measures that are feasible to track progression of MCI and detect an early signal of efficacy in """"""""Proof of Concept"""""""" clinical trials for early symptomatic stages of AD. n addition, we propose to probe the mechanistic underpinnings of aberrant fMRI activity, utilizing a novel combination of multi-modality imaging techniques.
Aim 1 will build on our fMRI work with face-name paradigms to develop and validate short clinical versions of the face-name associative memory exam (FNAME) that are sensitive to the effects of early AD pathology and will track progression over the continuum of MCI.
Aim 2 will investigate the relationship between memory task fMRI and resting state functional connectivity that will be more feasible in multi-center clinical trials. We predict that early task-related hyperactivity will precede and predict progression of functional disconnection during the resting state.
Aim 3 will test the hypothesis that the observed hyperactivity is an indicator of early excitotoxicity that will predict synaptic failure, neuronal loss and rapid clinical decline. We will employ a novel PET ligand (18-F-PEB) for the metabotropic glutamate receptor, mGluR5, which has been implicated in both learning and in excitotoxicity, in combination with 11-C-PiB amyloid imaging, 18-F-FDG glucose metabolism, with longitudinal functional and structural imaging to elucidate the neural mechanisms underlying progressive memory impairment over the course of early AD.

Public Health Relevance

This project will develop and optimize cognitive and imaging biomarkers to track progression through the early symptomatic stages of Alzheimer's disease. Building on our discoveries in the first funding cycle of this R01, we will develop sensitive face-name associative memory tests and functional MRI paradigms that are feasible for use in Proof of Concept clinical trials. We will also utilize a unique combination of PET and MR imaging measures to probe the mechanistic underpinnings of the functional changes we have observed over the course of mild cognitive impairment (MCI).

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
5R01AG027435-08
Application #
8658352
Study Section
Clinical Neuroscience and Neurodegeneration Study Section (CNN)
Program Officer
Hsiao, John
Project Start
2006-05-01
Project End
2017-03-31
Budget Start
2014-04-15
Budget End
2015-03-31
Support Year
8
Fiscal Year
2014
Total Cost
Indirect Cost
Name
Brigham and Women's Hospital
Department
Type
DUNS #
City
Boston
State
MA
Country
United States
Zip Code
02115
Hanseeuw, Bernard J; Jonas, Victoria; Jackson, Jonathan et al. (2018) Association of anxiety with subcortical amyloidosis in cognitively normal older adults. Mol Psychiatry :
Jacobs, Heidi I L; Hedden, Trey; Schultz, Aaron P et al. (2018) Structural tract alterations predict downstream tau accumulation in amyloid-positive older individuals. Nat Neurosci 21:424-431
d'Oleire Uquillas, Federico; Jacobs, Heidi I L; Hanseeuw, Bernard et al. (2018) Interactive versus additive relationships between regional cortical thinning and amyloid burden in predicting clinical decline in mild AD and MCI individuals. Neuroimage Clin 17:388-396
Sanabria, Angela; Alegret, Montserrat; Rodriguez-Gomez, Octavio et al. (2018) The Spanish version of Face-Name Associative Memory Exam (S-FNAME) performance is related to amyloid burden in Subjective Cognitive Decline. Sci Rep 8:3828
Buckley, Rachel F; Mormino, Elizabeth C; Amariglio, Rebecca E et al. (2018) Sex, amyloid, and APOE ?4 and risk of cognitive decline in preclinical Alzheimer's disease: Findings from three well-characterized cohorts. Alzheimers Dement 14:1193-1203
Lois, Cristina; Gonzalez, Ivan; Johnson, Keith A et al. (2018) PET imaging of tau protein targets: a methodology perspective. Brain Imaging Behav :
Donovan, Nancy J; Locascio, Joseph J; Marshall, Gad A et al. (2018) Longitudinal Association of Amyloid Beta and Anxious-Depressive Symptoms in Cognitively Normal Older Adults. Am J Psychiatry 175:530-537
Vannini, Patrizia; Amariglio, Rebecca; Hanseeuw, Bernard et al. (2017) Memory self-awareness in the preclinical and prodromal stages of Alzheimer's disease. Neuropsychologia 99:343-349
Pr?kovska, Vesna; Huijbers, Willem; Schultz, Aaron et al. (2017) Epicenters of dynamic connectivity in the adaptation of the ventral visual system. Hum Brain Mapp 38:1965-1976
Marquié, Marta; Verwer, Eline E; Meltzer, Avery C et al. (2017) Lessons learned about [F-18]-AV-1451 off-target binding from an autopsy-confirmed Parkinson's case. Acta Neuropathol Commun 5:75

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