p38 MAPK signaling pathway activation by phenyl benzoxime in SNU-306 cells causes induction of apoptosis.

Abstract:

:The present study was aimed to investigate and understand the mechanism of inhibitory effect of phenyl benzoxime on proliferation of SNU-306 cells. Proliferation of SNU-306 cells transfected with wild-type p53-induced phosphatase 1 (Wip1)-siRNA or treated with phenyl benzoxime was examined by 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Induction of apoptosis was examined by flow cytometry using annexin V-fluorescein isothiocyanate/propidium iodide staining. In SNU-306 cells Wip1 mRNA and protein expression was found to be significantly (p < 0.05) higher compared to normal cells. However, Wip1-siRNA transfection significantly (p < 0.02) inhibited the expression of Wip1 at 60 nmol/l. The proliferation of SNU-306 cells was inhibited to 3.7% on transfection with Wip1-siRNA. Phenyl benzoxime reduced proliferation to 92.0, 75.0, 49.0, 19.0 and 4.0% at 1, 2, 4, 8 and 10 μM doses, respectively. The expression of Wip1 was significantly (p < 0.01) suppressed in SNU-306 cells on phenyl benzoxime treatment. Phenyl benzoxime induced apoptosis in 74.73% cells at 10 μM doses compared to 1.34% in control. Treatment with phenyl benzoxime markedly increased the expression of Bax, caspase-3 and p53 and decreased Bcl-2 mRNA. Moreover, addition of SB203580 to cultures of SNU-306 cells significantly (p < 0.01) prevented phenyl benzoxime mediated inhibition of cell proliferation. Phenyl benzoxime induces apoptosis and inhibits SNU-306 cell proliferation by silencing Wip1 expression through p38 MAPK signaling pathway activation. Therefore, phenyl benzoxime can act as an important chemotherapeutic agent for breast cancer treatment.

journal_name

Microb Pathog

journal_title

Microbial pathogenesis

authors

Chen W,Tan Y,Zhang Y

doi

10.1016/j.micpath.2018.10.021

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

74-78

eissn

0882-4010

issn

1096-1208

pii

S0882-4010(18)31716-9

journal_volume

126

pub_type

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