Abstract:
:Recent reports have shown that the endoplasmic reticulum (ER) stress is relevant to the pathogenesis of Alzheimer disease. Following the amyloid cascade hypothesis, we therefore attempted to investigate the effects of ER stress on amyloid-beta peptide (Abeta) generation. In this study, we found that ER stress altered the localization of amyloid precursor protein (APP) from late compartments to early compartments of the secretory pathway, and decreased the level of Abeta 40 and Abeta 42 release by beta- and gamma-cutting. Transient transfection with BiP/GRP78 also caused a shift of APP and a reduction in Abeta secretion. It was revealed that the ER stress response facilitated binding of BiP/GRP78 to APP, thereby causing it to be retained in the early compartments apart from a location suitable for the cleavages of Abeta. These findings suggest that induction of BiP/GRP78 during ER stress may be one of the regulatory mechanisms of Abeta generation.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Kudo T,Okumura M,Imaizumi K,Araki W,Morihara T,Tanimukai H,Kamagata E,Tabuchi N,Kimura R,Kanayama D,Fukumori A,Tagami S,Okochi M,Kubo M,Tanii H,Tohyama M,Tabira T,Takeda Mdoi
10.1016/j.bbrc.2006.03.173subject
Has Abstractpub_date
2006-06-02 00:00:00pages
525-30issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(06)00730-3journal_volume
344pub_type
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