Proc Natl Acad Sci U S A. 1996 Aug 20;93(17):9223-8.

Expression and analysis of presenilin 1 in a human neuronal system: localization in cell bodies and dendrites.

Cook DG, Sung JC, Golde TE, Felsenstein KM, Wojczyk BS, Tanzi RE, Trojanowski JQ, Lee VM, Doms RW.

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Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia 19104, USA.

Abstract

Mutations in the recently identified presenilin 1 gene on chromosome 14 cause early onset familial Alzheimer disease (FAD). Herein we describe the expression and analysis of the protein coded by presenilin 1 (PS1) in NT2N neurons, a human neuronal model system. PS1 was expressed using recombinant Semliki Forest virions and detected by introduced antigenic tags or antisera to PS1-derived peptides. Immunoprecipitation revealed two major PS1 bands of approximately 43 and 50 kDa, neither of which were N-glycosylated or O-glycosylated. Immunoreactive PS1 was detected in cell bodies and dendrites of NT2N neurons but not in axons or on the cell surface. PS1 was also detected in BHK cells, where it was also intracellular and colocalized with calnexin, a marker for the rough endoplasmic reticulum. A mutant form of PS1 linked to FAD did not differ from the wild-type protein at the light microscopic level. The model system described here will enable studies of the function of PS1 in human neurons and the role of mutant PS1 in FAD.

PMID:: 8799182; [PubMed - indexed for MEDLINE]
PMCID:: PMC38623

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Expression and analysis of presenilin 1 in a human neuronal system: localization in cell bodies and dendrites.

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