國家衛生研究院 NHRI:Item 3990099045/2549

NHRI > National Institute of Environmental Health Sciences > Tsui-Chun Tsou > Periodical Articles > Item 3990099045/2549

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Title:	Glutathione regulation of redox-sensitive signals in tumor necrosis factor-alpha-induced vascular endothelial dysfunction
Other Titles:	Glutathione regulation of redox-sensitive signals in tumor necrosis factor-α-induced vascular endothelial dysfunction
Authors:	Tsou, TC;Yeh, SC;Tsai, FY;Chen, JW;Chiang, HC
Contributors:	Division of Environmental Health and Occupational Medicine
Abstract:	We investigated the regulatory role of glutathione in tumor necrosis factor-alpha (TNF-alpha)-induced vascular endothelial dysfunction as evaluated by using vascular endothelial adhesion molecule expression and monocyte-endothelial monolayer binding. Since TNF-alpha induces various biological effects on vascular cells, TNF-alpha dosage could be a determinant factor directing vascular cells into different biological fates. Based on the adhesion molecule expression patterns responding to different TNF-alpha concentrations, we adopted the lower TNF-alpha (0.2 ng/ml) to rule out the possible involvement of other TNF-alpha-induced biological effects. Inhibition of glutathione synthesis by L-buthionine-(S,R)-sulfoximine (BSO) resulted in down-regulations of the TNF-alpha-induced adhesion molecule expression and monocyte-endothelial monolayer binding. BSO attenuated the TNF-alpha-induced nuclear factor-kappaB (NF-kappa B) activation, however, with no detectable effect on AP-1 and its related mitogen-activated protein kinases (MAPKs). Deletion of an AP-1 binding site in intercellular adhesion molecule-1 (ICAM-1) promoter totally abolished its constitutive promoter activity and its responsiveness to TNF-alpha, Inhibition of ERK, JNK, or NF-kappa B attenuates TNF-alpha-induced ICAM-1 promoter activation and monocyte-endothelial monolayer binding. Our study indicates that TNF-alpha induces adhesion molecule expression and monocyte-endothelial monolayer binding mainly via activation of NF-kappa B in a glutathione-sensitive manner. We also demonstrated that intracellular glutathione does not modulate the activation of MAPKs and/or their downstream AP-1 induced by lower TNF-alpha. Although AP-1 activation by the lower TNF-alpha was not detected in our systems, we could not rule out the possible involvernent of transiently activated MAPKs/AP-1 in the regulation of TNF-alpha-induced adhesion molecule expression.
Keywords:	Pharmacology & Pharmacy;Toxicology
Date:	2007-06-01
Relation:	Toxicology and Applied Pharmacology. 2007 Jun;221(2):168-178.
Link to:	http://dx.doi.org/10.1016/j.taap.2007.03.005
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0041-008X&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000246993200004
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34248556290
Appears in Collections:	[Tsui-Chun Tsou] Periodical Articles

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