Low expression of phosphatase and tensin homolog in clear‑cell renal cell carcinoma contributes to chemoresistance through activating the Akt/HDM2 signaling pathway.

Abstract:

:Clear-cell renal cell carcinoma (CCRCC) is the most frequent primary malignancy in the adult kidney. Most patients with advanced CCRCC have poor prognosis as CCRCC remains resistant to chemotherapy. The present study explored the possible mechanism underlying CCRCC resistance to chemotherapy and found that loss of PTEN in CCRCC may be involved. Knockdown of PTEN in the CCRCC cell line ACHN blocked etoposide-induced apoptosis and etoposide-impaired cell proliferation was also inhibited. It has been demonstrated that most chemotherapy drugs exert their anti-cancer effects via p53-mediated apoptosis, and in accordance, with this, the present study showed that treatment with etoposide significantly increased p53 levels. Silencing of PTEN in ACHN inhibited the Akt/HDM2 signaling cascade and depressed p53 expression, and the interaction between HDM2 and p53 was also enhanced. This was further verified in CCRCC tissue specimens from patients The results of the present study suggested that loss of PTEN, which deactivated Akt/HDM2 signaling followed by degradation of p53, may contribute to the development of etoposide resistance in CCRCC.

journal_name

Mol Med Rep

authors

Chen J,Zhu H,Zhang Y,Cui MH,Han LY,Jia ZH,Wang L,Teng H,Miao LN

doi

10.3892/mmr.2015.3740

subject

Has Abstract

pub_date

2015-08-01 00:00:00

pages

2622-8

issue

2

eissn

1791-2997

issn

1791-3004

journal_volume

12

pub_type

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