Increased oxidative stress in the RAW 264.7 macrophage cell line is partially mediated via the S-nitrosothiol-induced inhibition of glutathione reductase |
| |
Authors: | Butzer U Weidenbach H Gansauge S Gansauge F Beger H G Nussler A K |
| |
Affiliation: | Department of General Surgery, University of Ulm, Germany. |
| |
Abstract: | We investigated whether endogenously or exogenously produced nitric oxide (NO) can inhibit cellular glutathione reductase (GR) via the formation of S-nitrosothiols to decrease cellular glutathione (GSH) and increase oxidative stress in RAW 264.7 cells. The specificity of this inhibition was demonstrated by addition of a NO-synthase inhibitor, and met- or oxyhemoglobin. Using isolated GR we found that only certain NO donors inhibit this enzyme via S-nitrosothiol. Furthermore, we found that cellular GSH decrease is paralleled by an increase of superoxide anion production. Our results show that the GR enzyme is a potential target of S-nitrosothiols to decrease cellular GSH levels and to induce oxidative stress in macrophages. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|