当前位置： SCI文献检索 > INFLAMMATION期刊下所有文献 > The nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide affects stress response and fate of lipopolysaccharide-primed RAW 264.7 macrophage cells.

The nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide affects stress response and fate of lipopolysaccharide-primed RAW 264.7 macrophage cells.

Abstract：

:The nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) is commonly used to study free radicals. Due to its free radical trapping properties, DMPO is thought to reduce free radial-mediated oxidative damage and other related cellular responses. The purpose of this study was to assess the effect of DMPO on lipopolysaccharide (LPS)-induced inflammation, endoplasmic reticulum (ER) stress, and apoptosis in RAW 264.7 cells. The results showed that DMPO at 50 mM inhibited inducible nitric oxide synthase expression when added shortly after LPS treatment (≤3 h). Interestingly, DMPO increased anti-inflammatory heme oxygenase-1 (HO-1) expression and reversed LPS-induced decrease in HO-1 expression. LPS could increase cellular ER stress as indicated by C/EBP homologous protein (CHOP) induction; DMPO reduced LPS effect on CHOP expression. Unexpectedly, DMPO had a synergistic effect with LPS on increased caspase-3 activity. Overall, DMPO harbors multiple modulating effects but may induce apoptosis in LPS-stressed cells when given at 50 mM, an effective dose for its anti-inflammatory activity in vitro. Our data provide clues for further understanding of the nitrone spin trap with therapeutic potential.

journal_name

Inflammation

journal_title

Inflammation

authors

Zhai Z,Gomez-Mejiba SE,Ramirez DC

doi

10.1007/s10753-012-9552-4

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

346-54

issue

2

eissn

0360-3997

issn

1573-2576

journal_volume

36

pub_type

杂志文章

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