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Crosstalk of JNK1-STAT3 is critical for RAW264.7 cell survival.

Abstract：

:T-2 toxin, a major compound of trichothecenes, inhibits protein synthesis and induces inflammation and cell apoptosis through the activation of MAPK pathway. The JAK/STAT pathway has recently been shown to be downstream targets of trichothecenes. However, whether there is any crosstalk between JNK and JAK/STAT pathways in trichothecene toxicity has not been studied. In the present study, we explored this potential in RAW264.7 cells treated with T-2 toxin. Our results revealed a crosstalk between JNK1 and STAT3 after T-2 toxin treatment, which was mediated by K-Ras. T-2 toxin treatment resulted in rapid phosphorylation, and more importantly, JNK1-STAT3 signaling pathway was shown to maintain the normal function of the mitochondria and to inhibit T-2 toxin-induced apoptosis. Therefore, this pathway was considered to be a potential cell survival pathway. Breakdown and degranulation of ribosomes in the rough endoplasmic reticulum and swelling of mitochondria were clearly visible after the cells had been incubated with T-2 toxin for 12h. Our data suggest that T-2 toxin had a Janus face: it induced both apoptotic and cell survival pathways. These results suggest that the crosstalk and the balance between MAPK and JAK/STAT pathway might be involved in T-2 toxin-induced apoptosis in RAW264.7 cells.

journal_name

Cell Signal

journal_title

Cellular signalling

authors

Wu Q,Wang X,Wan D,Li J,Yuan Z

doi

10.1016/j.cellsig.2014.09.013

subject

Has Abstract

pub_date

2014-12-01 00:00:00

pages

2951-60

issue

12

eissn

0898-6568

issn

1873-3913

pii

S0898-6568(14)00317-9

journal_volume

26

pub_type

杂志文章

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