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Vanadate inhibits endoplasmic reticulum stress responses
Toru Hosoi1, Atsushi Saito, Ayaka Kume
1Department of Pharmacotherapy, Graduate School of Biomedical Sciences, Hiroshima University, Kasumi 1-2-3, Hiroshima 734-8553, Japan.
European Journal of Pharmacology
|August 14, 2008
Summary
Vanadate treatment reduces endoplasmic reticulum (ER) stress in glial cells. This compound inhibited the ER stress markers, glucose-regulated protein 78 (GRP78) and CCAAT/enhancer-binding protein homologous protein (CHOP), suggesting a protective role.
Area of Science:
- Cellular Biology
- Neuroscience
- Biochemistry
Background:
- Endoplasmic reticulum (ER) stress occurs when unfolded proteins accumulate due to ER dysfunction.
- ER stress is implicated in various cellular pathologies and neurological disorders.
- Glial cells play crucial roles in the central nervous system and are susceptible to stress.
Purpose of the Study:
- To investigate the effect of vanadate on endoplasmic reticulum stress in glial cell cultures.
- To determine if vanadate can modulate the expression of key ER stress markers.
Main Methods:
- Glial cell cultures were subjected to endoplasmic reticulum stress.
- The expression levels of glucose-regulated protein 78 (GRP78) and CCAAT/enhancer-binding protein homologous protein (CHOP) were measured.
- Vanadate was administered to assess its impact on ER stress markers at both mRNA and protein levels.
Main Results:
- Endoplasmic reticulum stress significantly increased the expression of GRP78 and CHOP in glial cells.
- Vanadate treatment effectively inhibited the ER stress-induced upregulation of GRP78 and CHOP.
- This inhibition was observed at both the messenger RNA (mRNA) and protein levels.
Conclusions:
- Vanadate demonstrates a modulatory effect on endoplasmic reticulum stress responses in glial cells.
- The findings suggest that vanadate may offer a protective mechanism against ER stress.
- Novel vanadate-responsive proteins likely mediate these observed effects on ER stress.
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