Nitric oxide inhibits expression of cytochrome B in endotoxin-stimulated murine macrophages.
Journal Article (Journal Article)
In LPS-mediated states of sepsis, inducible nitric oxide synthase (iNOS) expression and nitric oxide (NO) production inhibit cellular respiration and mitochondrial electron transport. NO has been demonstrated to inhibit mitochondrial respiration by nitrosylation of the iron-sulfur centers of aconitase, complex I (NADH-ubiquinone oxidoreductase), complex II (succinate-ubiquinone oxidoreductase), and complex IV (cytochrome c oxidase). However, little is known of the effect of NO on expression of critical proteins in the electron transport chain. In ANA-1 murine macrophages, LPS-mediated NO synthesis decreases Cyt b protein expression and steady-state mRNA levels. Mitochondrial run-on analysis demonstrates unaltered Cyt b mitochondrial gene transcription. In this study utilizing LPS-stimulated ANA-1 murine macrophages, we demonstrate that expression of the mitochondrial protein, Cyt b, is significantly decreased as the result of a unique and previously unknown, NO-dependent posttranscriptional regulatory mechanism. (c)2001 Elsevier Science.
Full Text
Duke Authors
Cited Authors
- Guo, H; Wei, J; Kuo, PC
Published Date
- December 21, 2001
Published In
Volume / Issue
- 289 / 5
Start / End Page
- 993 - 997
PubMed ID
- 11741289
International Standard Serial Number (ISSN)
- 0006-291X
Digital Object Identifier (DOI)
- 10.1006/bbrc.2001.6107
Language
- eng
Conference Location
- United States