当前位置： SCI文献检索 > PHARMACOLOGICAL RESEARCH期刊下所有文献 > Blockade of the p38 mitogen-activated protein kinase pathway inhibits inducible nitric oxide synthase and interleukin-6 expression in MC3T3E-1 osteoblasts.

Blockade of the p38 mitogen-activated protein kinase pathway inhibits inducible nitric oxide synthase and interleukin-6 expression in MC3T3E-1 osteoblasts.

Abstract：

:Treatment of MC3T3E-1 osteoblast cultures with combined interferon- gamma(IFN- gamma), lipopolysaccharide (LPS) and tumor necrosis factor- alpha(TNF- alpha) induces expressions of inducible nitric oxide synthase (iNOS) and interleukin-6 (IL-6), resulting in sustained releases of large amounts of nitric oxide and IL-6. However IFN- gamma, LPS and TNF- alpha individually induces non-detectable or small amounts of NO and IL-6 in MC3T3E-1 osteoblasts. The role of mitogen-activated protein kinase (MAPK) activation in the early intracellular signal transduction involved in iNOS and IL-6 transcription in the combined agents-stimulated osteoblasts has been investigated. The p38 MAPK pathway is specifically involved in the combined agents-induced NO and IL-6 release, since NO and IL-6 release in the presence of a specific inhibitor of p38 MAPK, 4-(4-fluorophenyl)-2-(4-metylsulfinylphenyl)-5-(4-pyridyl)imidazole (SB203580), are significantly diminished. In contrast, PD98059, a specific inhibitor of MEK1, had no effect on NO and IL-6 release. Northern blot analysis showed that the p38 MAPK pathway controlled iNOS and IL-6 transcription levels. These data suggest that p38 MAPK plays an important role in the secretion of NO and IL-6 in LPS/IFN- gamma or TNF- alpha /IFN- gamma -treated MC3T3E-1 osteoblasts.

journal_name

Pharmacol Res

journal_title

Pharmacological research

authors

Chae HJ,Kim SC,Chae SW,An NH,Kim HH,Lee ZH,Kim HR

doi

10.1006/phrs.2000.0778

keywords:

subject

Has Abstract

pub_date

2001-03-01 00:00:00

pages

275-83

issue

3

eissn

1043-6618

issn

1096-1186

pii

S1043661800907783

journal_volume

43

pub_type

杂志文章

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