Lipopolysaccharide prevents apoptosis induced by brefeldin A, an endoplasmic reticulum stress agent, in RAW 264.7 cells.

Abstract:

:The effect of lipopolysaccharide (LPS) on the cell death induced by endoplasmic reticulum (ER) stress agents in RAW 264.7 cells was studied. LPS prevented the cell death by brefeldin A, but not thapsigargin and tunicamycin. CpG DNA as well as LPS prevented brefeldin A-induced cell death whereas tumor necrosis factor-alpha or interferon-gamma did not. Brefeldin A-induced cell death was mediated with apoptotic cell death and it was significantly inhibited by LPS. LPS abolished the activation of ER stress-related caspases, such as caspases 1, 3, and 4. LPS prevented brefeldin A-induced morphological changes in RAW 264.7 cells. Further, LPS prevented brefeldin A-induced Golgi dispersion. Therefore, LPS was suggested to diminish the stress of ER/Golgi complexes induced by brefeldin A and inhibit apoptosis. The preventive action of LPS on brefeldin A-induced apoptosis is discussed.

authors

Islam S,Hassan F,Tumurkhuu G,Ito H,Koide N,Mori I,Yoshida T,Yokochi T

doi

10.1016/j.bbrc.2005.12.050

subject

Has Abstract

pub_date

2006-02-10 00:00:00

pages

589-96

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)02801-9

journal_volume

340

pub_type

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