JCB logo
amgmicro.com
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published online 3 May 2004. doi:10.1083/jcb.200310015
The Rockefeller University Press, 0021-9525 $8.00
JCB, Volume 165, Number 3, 347-356
This Article
Right arrow Full Text
Right arrow Full Text (PDF, 2105K)
Right arrow PPT slides of all figures
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Hitomi, J.
Right arrow Articles by Tohyama, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hitomi, J.
Right arrow Articles by Tohyama, M.
Related Collections
Right arrowRelated Article
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Article

Involvement of caspase-4 in endoplasmic reticulum stress-induced apoptosis and Aß-induced cell death



Junichi Hitomi1,6, Taiichi Katayama1,6, Yutaka Eguchi2,6,7, Takashi Kudo3, Manabu Taniguchi1,6, Yoshihisa Koyama1,6, Takayuki Manabe1,6, Satoru Yamagishi1,6, Yoshio Bando4, Kazunori Imaizumi5, Yoshihide Tsujimoto2,6,7, and Masaya Tohyama1,6

1 Department of Anatomy and Neuroscience, Department of Post-Genomics and Diseases, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
2 Division of Molecular Genetics, Department of Post-Genomics and Diseases, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
3 Division of Psychiatry and Behavioural Proteomics, Department of Post-Genomics and Diseases, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
4 Department of Anatomy, Asahikawa Medical College, Midorigaoka Higashi, Asahikawa, Hokkaido, 078-8510, Japan
5 Division of Structural Cell Biology, Nara Institute of Science and Technology, Takayama, Ikoma, Nara 630-0101, Japan
6 21st Century COE Program, Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo 102-8471, Japan
7 Solution Oriented Research for Science and Technology of Japan, Science and Technology Agency, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan

Address correspondence to Taiichi Katayama, Dept. of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan. Tel.: 81-6-6879-3221. Fax: 81-6-6879-3229. email: katayama{at}anat2.med.osaka-u.ac.jp; or Yutaka Eguchi, Division of Molecular Genetics, Dept. of Post-Genomics and Disease, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan. Tel.: 81-6-6879-3363. Fax: 81-6-6879-3369. email: eguchi{at}gene.med.osaka-u.ac.jp

Recent studies have suggested that neuronal death in Alzheimer's disease or ischemia could arise from dysfunction of the endoplasmic reticulum (ER). Although caspase-12 has been implicated in ER stress-induced apoptosis and amyloid-ß (Aß)–induced apoptosis in rodents, it is controversial whether similar mechanisms operate in humans. We found that human caspase-4, a member of caspase-1 subfamily that includes caspase-12, is localized to the ER membrane, and is cleaved when cells are treated with ER stress-inducing reagents, but not with other apoptotic reagents. Cleavage of caspase-4 is not affected by overexpression of Bcl-2, which prevents signal transduction on the mitochondria, suggesting that caspase-4 is primarily activated in ER stress-induced apoptosis. Furthermore, a reduction of caspase-4 expression by small interfering RNA decreases ER stress-induced apoptosis in some cell lines, but not other ER stress-independent apoptosis. Caspase-4 is also cleaved by administration of Aß, and Aß-induced apoptosis is reduced by small interfering RNAs to caspase-4. Thus, caspase-4 can function as an ER stress-specific caspase in humans, and may be involved in pathogenesis of Alzheimer's disease.

Key Words: apoptosis; ER stress; caspase-4; Alzheimer's disease; amyloid-ß


Abbreviations used in this paper: Aß, amyloid-ß; AD, Alzheimer's disease; ICE, interleukin-1ß converting enzyme; RNAi, RNA interference; siRNA, small interfering RNA; TRAF2, tumor necrosis factor receptor–associated factor 2; UPR, unfolded protein response.


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?

Related Article

A caspase for stress
William A. Wells
J. Cell Biol. 2004 165: 295. [Full Text] [PDF]



This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents