Inducible HSP70 antagonizes cisplatin‑induced cell apoptosis through inhibition of the MAPK signaling pathway in HGC‑27 cells.

Abstract:

:Inducible heat shock protein 70 (HSP70; also known as HSPA1 or HSP72) is implicated in cancer. As a stress‑inducible heat shock protein, HSP70 is highly expressed in a variety of cancers and correlates with metastasis, chemotherapy resistance and tumor prognosis. The present study demonstrated that suppression of HSP70 through the specific inhibitor pifithrin‑µ or by HSP70 knockdown enhanced cisplatin‑induced apoptosis in HGC‑27 gastric cancer cells. By contrast, upregulation of HSP70 through transfection of a HSP70 overexpressing plasmid decreased cisplatin‑induced HGC‑27 cell apoptosis. In exploring the underlying molecular mechanisms, the present results revealed that HSP70 antagonized cisplatin‑induced HGC‑27 cell apoptosis by regulating the mitogen‑activated protein kinase (MAPK) signaling pathway. In addition, suppressing the MAPK pathway enhanced cisplatin‑induced HGC‑27 cell apoptosis. Collectively, the present findings suggest that inhibition of HSP70 expression enhanced the sensitivity of HGC‑27 cells to cisplatin via the MAPK signaling pathway, and that HSP70 may serve as a potential therapeutic target in gastric cancer.

journal_name

Int J Mol Med

authors

Sheng L,Tang T,Liu Y,Ma Y,Wang Z,Tao H,Zhang Y,Qi Z

doi

10.3892/ijmm.2018.3789

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

2089-2097

issue

4

eissn

1107-3756

issn

1791-244X

journal_volume

42

pub_type

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