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Evaluation of EVI1 and EVI1s (Delta324) as potential therapeutic targets in ovarian cancer.

Abstract：

PURPOSE:The MDS1 and EVI1 complex locus (MECOM) at 3q26 gives rise to several alternatively spliced transcripts implicated in leukemic oncogenesis. Overexpression of EVI1 in ovarian cancer has led to a proposed oncogenic role. Our objective was to evaluate the therapeutic potential of EVI1 and EVI1s (also known as Delta324) in ovarian cancer. METHODS:Expression of EVI1 mRNA and protein isoforms was evaluated in ovarian cancers, normal ovaries, benign ovarian neoplasms, and fallopian tube fimbria. Effects of EVI1 isoform overexpression and knockdown on proliferation, cisplatin-induced apoptosis, and double stranded DNA breaks were investigated. RESULTS:EVI1 and EVI1s mRNAs were ubiquitously expressed in ovarian cancers and benign gynecologic tissues examined, with highest expression of both isoforms noted in the cancer samples. The EVI1s to total EVI1 mRNA ratio was uniform among the examined tissues. In contrast, EVI1 protein isoform levels were undetectable in normal ovarian tissues, and highest in serous ovarian cancers. EVI1 protein expression patterns were similar between serous ovarian cancer samples, fallopian tube fimbria, and benign neoplasms. Expression of EVI1 or EVI1s did not increase proliferation in EVI1-null OVCAR8 cells. Total and isoform selective knockdown of EVI1 isoforms in EVI1 expressing ovarian cancer cells had no effect on proliferation, cisplatin-induced apoptosis, or gamma-H2AX levels in ovarian cancer cells. CONCLUSION:Our data do not support a role for EVI1 or EVI1s in ovarian cancer cell proliferation or response to DNA damage. Further research is required before EVI1 can be considered an oncogene or a therapeutic target in ovarian cancer.

journal_name

Gynecol Oncol

journal_title

Gynecologic oncology

authors

Jazaeri AA,Ferriss JS,Bryant JL,Dalton MS,Dutta A

doi

10.1016/j.ygyno.2010.04.007

subject

Has Abstract

pub_date

2010-08-01 00:00:00

pages

189-95

issue

2

eissn

0090-8258

issn

1095-6859

pii

S0090-8258(10)00293-3

journal_volume

118

pub_type

杂志文章

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