Reversion of v-H-ras-transformed NIH 3T3 cells by apigenin through inhibiting mitogen activated protein kinase and its downstream oncogenes.

Abstract:

:Apigenin, a plant flavonoid, induced the reversion of transformed phenotypes of v-H-ras-transformed NIH 3T3 cells at a quite low concentration of 12.5 microM. In the present study, we have examined the components of this Ras-mediated signaling transduction to determine whether they were involved in the apigenin-induced reversion process. Interestingly, the consitutively activated mitogen activated protein kinase (MAPK) in the ras transformant was inhibited significantly and rapidly by 25 microM apigenin within 30 min, and this reduction continued for more than 4 h. Corroborating these observations, expression of the downstream oncogenes c-jun and c-fos was also dramatically reduced during the first 4 h of treatment. We found that the levels of ras protein and mRNA were not affected by 24 h of treatment with apigenin. These findings indicate that apigenin-induced reversion of v-H-ras-transformed NIH 3T3 cells may occur by inhibiting MAPK activity and its downstream oncogenes rather than by affecting the expression of the ras gene.

authors

Kuo ML,Yang NC

doi

10.1006/bbrc.1995.2035

subject

Has Abstract

pub_date

1995-07-26 00:00:00

pages

767-75

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006291X85720359

journal_volume

212

pub_type

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