This is a request for the continuation of a research program that has been concerned with the involvement of fibrous proteins in Alzheimer's disease patients. The new work proposed now focuses exclusively on the role of a single protein and its derivatives (the amyloid beta protein precursor) in the genesis of the progressive, neuritic and glial changes that invariably accompany Alzheimer's disease. A hypothesis implicating amyloid beta protein precursor in the initiation of a complex cascade of molecular and cellular changes that eventually produce the dementia of Alzheimer's disease is presented. This hypothesis is introduced because the presence of the amyloid beta protein seems linked to aging and alzheimer's disease having a wide spread existence inside and outside brain in Alzheimer's disease and because several laboratories have reported that amorphous, largely non-filamentous, deposits of amyloid beta protein appear to precede neuronal or glial cytopathology in Alzheimer's disease and Down's Syndrome. The new aims are 1) to define the DNA sequences, protein modifications and proteolytic processing of APP in many different species, species that invariably develop amyloid beta protein deposited in tissues outside of the brain, especially the skin, 3) to assess the biological effects of amyloid beta protein 1-40 on primary neurons, astrocytes and microglial in vitro; 4) to determine the exact site of normal constitutive cleavage of APP in vivo using human CSF and urine; and 5) to search for an endothelial cell receptor that could bind and take up the circulating forms of APP that have recently been identified in blood by these investigators.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Method to Extend Research in Time (MERIT) Award (R37)
Project #
5R37AG006173-09
Application #
2049480
Study Section
Neurology A Study Section (NEUA)
Project Start
1985-09-01
Project End
1996-01-31
Budget Start
1994-02-15
Budget End
1995-01-31
Support Year
9
Fiscal Year
1994
Total Cost
Indirect Cost
Name
Brigham and Women's Hospital
Department
Type
DUNS #
071723621
City
Boston
State
MA
Country
United States
Zip Code
02115
Xu, Huixin; Rajsombath, Molly M; Weikop, Pia et al. (2018) Enriched environment enhances ?-adrenergic signaling to prevent microglia inflammation by amyloid-?. EMBO Mol Med 10:
Li, Shaomin; Jin, Ming; Liu, Lei et al. (2018) Decoding the synaptic dysfunction of bioactive human AD brain soluble A? to inspire novel therapeutic avenues for Alzheimer's disease. Acta Neuropathol Commun 6:121
Yang, Ting; Li, Shaomin; Xu, Huixin et al. (2017) Large Soluble Oligomers of Amyloid ?-Protein from Alzheimer Brain Are Far Less Neuroactive Than the Smaller Oligomers to Which They Dissociate. J Neurosci 37:152-163
Walsh, Dominic M; Selkoe, Dennis J (2016) A critical appraisal of the pathogenic protein spread hypothesis of neurodegeneration. Nat Rev Neurosci 17:251-60
Selkoe, Dennis J; Hardy, John (2016) The amyloid hypothesis of Alzheimer's disease at 25 years. EMBO Mol Med 8:595-608
Jin, Ming; Selkoe, Dennis J (2015) Systematic analysis of time-dependent neural effects of soluble amyloid ? oligomers in culture and in vivo: Prevention by scyllo-inositol. Neurobiol Dis 82:152-163
Holmes, Oliver; Paturi, Swetha; Selkoe, Dennis J et al. (2014) Pen-2 is essential for ?-secretase complex stability and trafficking but partially dispensable for endoproteolysis. Biochemistry 53:4393-406
Muratore, Christina R; Rice, Heather C; Srikanth, Priya et al. (2014) The familial Alzheimer's disease APPV717I mutation alters APP processing and Tau expression in iPSC-derived neurons. Hum Mol Genet 23:3523-36
Morris, John C; Selkoe, Dennis J (2011) Recommendations for the incorporation of biomarkers into Alzheimer clinical trials: an overview. Neurobiol Aging 32 Suppl 1:S1-3
Shepardson, Nina E; Shankar, Ganesh M; Selkoe, Dennis J (2011) Cholesterol level and statin use in Alzheimer disease: I. Review of epidemiological and preclinical studies. Arch Neurol 68:1239-44

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