View : 492 Download: 0
Inhibition of Src tyrosine kinases suppresses activation of nuclear factor-κB, and serine and tyrosine phosphorylation of IκB-α in lipopolysaccharide-stimulated raw 264.7 macrophages
- Title
- Inhibition of Src tyrosine kinases suppresses activation of nuclear factor-κB, and serine and tyrosine phosphorylation of IκB-α in lipopolysaccharide-stimulated raw 264.7 macrophages
- Authors
- Kang J.L.; Hye W.L.; Hee J.K.; Hui S.L.; Castranova V.; Lim C.-M.; Koh Y.
- Ewha Authors
- 이지희
- SCOPUS Author ID
- 이지희
- Issue Date
- 2005
- Journal Title
- Journal of Toxicology and Environmental Health - Part A
- ISSN
- 1528-7394
- Citation
- Journal of Toxicology and Environmental Health - Part A vol. 68, no. 19, pp. 1643 - 1662
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Involvement of protein tyrosine kinases (PTK) in lipopolysaccharide (LPS)-induced nuclear factor-kappa B (NF- B) activation has been demonstrated. Studies investigated the role of PTK and the underlying mechanisms by which PTK play a role in LPS induction of pathways leading to NF- B activation in macrophages. Inhibitors of PTK - genistein, herbimycin A, or AG126 - blocked LPS-induced NF- B activation. Genistein also blocked pervanadate-induced NF- B activation. Furthennore, Src TK selective inhibitors - damnacanthal or PP1 - blocked LPS-induced NF- B activation over a range of nanomolar concentrations. Genistein, damnacanthal, or PP1 blocked the LPS-induced serine phosphorylation, the degradation of I B- , and the consequent translocation of the p65 subunit of NF- B to the nucleus. In addition to serine phosphorylation of I B- , LPS-induced NF- B activation also required tyrosine phosphorylation of I B- . These TK inhibitors blocked substantially LPS induction of tyrosine phosphorylation of I B- . Furthermore, cSrc and Lck were physically associated with I B- . These results suggest that the LPS-induced NF- B pathways are dependent on both serine and tyrosine phosphorylation of I B- , and that Src TK, such as cSrc and Lck, are key components of the LPS signaling pathway through at least two different mechanisms associated with NF- B activation. Copyright© Taylor & Francis Inc.
- DOI
- 10.1080/15287390500192114
- Appears in Collections:
- 의과대학 > 의학과 > Journal papers
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML