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Glucuronic acid is a novel inducer of heat shock response

Title
Glucuronic acid is a novel inducer of heat shock response
Authors
Kim Y.M.Kim H.-J.Song E.J.Lee K.-J.
Ewha Authors
이공주김영미김희정
SCOPUS Author ID
이공주scopus; 김영미scopus; 김희정scopusscopusscopus
Issue Date
2004
Journal Title
Molecular and Cellular Biochemistry
ISSN
0300-8177JCR Link
Citation
vol. 259, no. 41276, pp. 23 - 33
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The elevated expression of 70 kDa heat shock protein (Hsp70) induces resistance to stress-induced apoptosis. We have screened a variety of natural products for their ability to enhance Hsp70 expression as anti-apoptotic agent. We found that glucuronic acid (GA) induced the synthesis of Hsp70 and that cells pretreated with GA were significantly tolerant to stress including heat shock and hydrogen peroxide. We also found that GA induces the production of reactive oxygen species (ROS), a process inhibited by NADPH oxidase inhibitor, diphenyleneiodonium chloride (DPI) and antioxidant N-acetylcysteine (NAC). GA-induced ROS production was also inhibited in RacN17 cell line overexpressing a dominant negative mutant of Rac1. Furthermore, GA treatment induces MAPKs activation (SAPK/JNK and p38) and Hsp70 expression in ROS dependent manner, suggesting that GA turns on the signaling pathway by generation of ROS through Rac1. We analyzed the profiles of newly synthesized proteins by GA with 2-dimensional gel electrophoresis and MALDI-TOF MS and found that two families of proteins were expressed by GA. One was similar to the protein family synthesized by heat shock (Hsp70, Hsp73, Hsp65, Hsp90, vimentin, tubulin, Ras homolog); and the other was a family of protein specific to GA (calreticulin, annexin III, thioredoxin peroxidase). These results suggest that GA-induced stress responses are mediated by ROS generation and are similar, in part, to heat shock-induced responses and GA can be possibly adopted for the protecting agent from cell death. © 2004 Kluwer Academic Publishers.
DOI
10.1023/B:MCBI.0000021341.38630.52
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약학대학 > 약학과 > Journal papers
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