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Induction of pro‐apoptotic calsenilin/DREAM/KChIP3 in Alzheimer's disease and cultured neurons after amyloid‐β exposure
Author(s) -
DongGyu Jo,
JooYong Lee,
YeonMi Hong,
Sungmin Song,
Inhee MookJung,
JaeYoung Koh,
YongKeun Jung
Publication year - 2004
Publication title -
journal of neurochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.75
H-Index - 229
eISSN - 1471-4159
pISSN - 0022-3042
DOI - 10.1111/j.1471-4159.2004.02159.x
Subject(s) - neurodegeneration , alzheimer's disease , presenilin , biology , bace1 as , amyloid (mycology) , amyloid precursor protein , neuroscience , biochemistry of alzheimer's disease , microbiology and biotechnology , medicine , disease , botany
Calsenilin/DREAM/KChIP3 was identified as a calcium‐binding protein that interacts with presenilins, serves as a transcription repressor, and binds to the A‐type potassium channel. In this study, we hypothesized that calsenilin might be involved in the neurodegeneration of Alzheimer's disease and examined calsenilin expression in Alzheimer's disease. Calsenilin levels were elevated in the cortex region of Alzheimer's patient brains and in the neocortex and the hippocampus of Swedish mutant β‐amyloid precursor protein transgenic mice brains. Induction of calsenilin was also observed in the activated astroglia as well as in the neurons surrounding β‐amyloid (Aβ)‐ and Congo red‐positive plaques. Exposing cultured cortical and hippocampal neurons to Aβ42, an amyloid‐β peptide whose deposition in the brain is a characteristic of Alzheimer's disease, induced both calsenilin protein and mRNA expression, and cell death. Moreover, blocking the calsenilin expression protected the neuronal cells from Aβ toxicity. These findings suggest that chronic up‐regulation of calsenilin may be a risk factor for developing Alzheimer's disease, perhaps by facilitating calsenilin‐mediated neurodegeneration.