c-Rel Promotes Invasion of Choriocarcinoma Cells via PI3K/AKT Signaling.

Abstract:

OBJECTIVE:Choriocarcinoma is the most common epithelial cancer among gestational trophoblastic diseases (GTDs); the mechanism of trophoblastic carcinogenesis is unknown. This study aimed to examine the expression of NF-κB family proteins in GTDs and placental tissues as well as the roles of c-Rel in choriocarcinoma. METHODS:We examined the expression of NF-κB family proteins in normal placenta and hydatidiform mole tissues as well as extravillous trophoblast (EVT) and choriocarcinoma cell lines by Western blot and immunohistochemistry. Immunoprecipitation was performed to determine which proteins can bind with c-Rel in choriocarcinoma cells. To investigate the roles of c-Rel in choriocarcinoma, we examined the effects of c-Rel knockdown and overexpression on cell proliferation, migration, and invasion using small interfering RNAs and gene activation plasmid. RESULTS:The expression of c-Rel was strong in choriocarcinoma and EVTs, but very weak in villi of normal placenta and hydatidiform mole. Immunoprecipitation suggested that c-Rel heterodimerizes with p65 in choriocarcinoma. c-Rel knockdown reduced invasion, migration, and AKT phosphorylation in choriocarcinoma cells. c-Rel overexpression in choriocarcinoma increased migratory and invasive abilities, and the effect on invasion was inhibited by a PI3K inhibitor. CONCLUSION:These findings suggest that c-Rel might play a role in promoting the invasion of choriocarcinoma cells through PI3K/AKT signaling.

journal_name

Oncology

journal_title

Oncology

authors

Sekiya Y,Yamamoto E,Niimi K,Nishino K,Nakamura K,Kotani T,Kajiyama H,Shibata K,Kikkawa F

doi

10.1159/000458529

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

299-310

issue

5

eissn

0030-2414

issn

1423-0232

pii

000458529

journal_volume

92

pub_type

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