Project 6 is designed to determine, in several experimental paradigms, the degree to which intraventricular nerve growth factor (NGF) and peripheral nerve grafts restore the properties and prevent degeneration of neurons of the basal forebrain magnocellular complex (BFMC). First, we will examine the efficacy of NGF to prevent degeneration of medial septal neurons following resection of the fimbria-fornix; responses of cells to injury and to NGF administration will be evaluated with techniques of cellular/molecular biology. Second, in animals in which the fornix is resected, we will test the ability of nerve grafts (with or without NGF) to maintain the viability of septal neurons, to promote regeneration of their axons into nerve grafts, and to reinnervate hippocampal targets; experimental and control groups will be evaluated with approaches ranging from behavioral tests to cellular/molecular approaches. Third, we will examine the potential for NGF to improve memory functions in subsets of aged rodents showing impairments on memory tasks; brains will be analyzed to delineate recovery-related responses of BFMC neurons. With these rodent studies as a background, we will be in a position to extend these approaches (i.e., effects of NGF and grafts on axotomized neurons) to investigations of nonhuman primates. Finally, once these investigations are complete, we will be in a position to test the efficacy of NGF in improving memory performance of behaviorally characterized old macaques and to assess the effects of NGF on BFMC neurons in these animals. Our laboratory has considerable experience in research relevant to this work including: investigations of anatomical/physiological organization of the BFMC; studies of the consequences of lesions of this system on animal behavior (rats and monkeys); assessment of the neural and functional consequences of neural grafts; and delineation of the cellular abnormalities of BFMC neurons in experimental disorders and in a variety of human diseases, including Alzheimer's disease and Parkinson's disease. We believe that these experiments hold great promise for illuminating mechanisms underlying recovery processes in brain that may, ultimately, be used to treat neurological disorders that occur in humans.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Specialized Center (P50)
Project #
5P50AG005146-08
Application #
3809231
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
8
Fiscal Year
1990
Total Cost
Indirect Cost
Name
Johns Hopkins University
Department
Type
DUNS #
045911138
City
Baltimore
State
MD
Country
United States
Zip Code
21218
Ganguli, Mary; Albanese, Emiliano; Seshadri, Sudha et al. (2018) Population Neuroscience: Dementia Epidemiology Serving Precision Medicine and Population Health. Alzheimer Dis Assoc Disord 32:1-9
Tsapkini, Kyrana; Webster, Kimberly T; Ficek, Bronte N et al. (2018) Electrical brain stimulation in different variants of primary progressive aphasia: A randomized clinical trial. Alzheimers Dement (N Y) 4:461-472
Crum, Jana; Wilson, Jeffrey; Sabbagh, Marwan (2018) Does taking statins affect the pathological burden in autopsy-confirmed Alzheimer's dementia? Alzheimers Res Ther 10:104
Ramsey, Christine M; Gnjidic, Danijela; Agogo, George O et al. (2018) Longitudinal patterns of potentially inappropriate medication use following incident dementia diagnosis. Alzheimers Dement (N Y) 4:1-10
Riello, Marianna; Faria, Andreia V; Ficek, Bronte et al. (2018) The Role of Language Severity and Education in Explaining Performance on Object and Action Naming in Primary Progressive Aphasia. Front Aging Neurosci 10:346
Petyuk, Vladislav A; Chang, Rui; Ramirez-Restrepo, Manuel et al. (2018) The human brainome: network analysis identifies HSPA2 as a novel Alzheimer’s disease target. Brain 141:2721-2739
Chen, Lin; Wei, Zhiliang; Chan, Kannie W Y et al. (2018) Protein aggregation linked to Alzheimer's disease revealed by saturation transfer MRI. Neuroimage 188:380-390
Ayhan, Fatma; Perez, Barbara A; Shorrock, Hannah K et al. (2018) SCA8 RAN polySer protein preferentially accumulates in white matter regions and is regulated by eIF3F. EMBO J 37:
Sathe, Gajanan; Na, Chan Hyun; Renuse, Santosh et al. (2018) Phosphotyrosine profiling of human cerebrospinal fluid. Clin Proteomics 15:29
Martin, Lee J; Chang, Qing (2018) DNA Damage Response and Repair, DNA Methylation, and Cell Death in Human Neurons and Experimental Animal Neurons Are Different. J Neuropathol Exp Neurol 77:636-655

Showing the most recent 10 out of 830 publications