Overexpression of GPR35 confers drug resistance in NSCLC cells by β-arrestin/Akt signaling.

Abstract:

Background:Non-small-cell lung cancer (NSCLC) is the major leading cause of cancer-related death around the world. The resistance to chemotherapy limits the effects of clinical treatment. The aim of this study was to identify novel mechanisms involved in NSCLC chemoresistance. Materials and methods:We explored the public database and commercial tissue microarray to evaluate the expression of G protein-coupled receptor 35 (GPR35). We established the chemoresistant A549 cell line to further investigate the biological function of GPR35 in vitro and in vivo. Then, we measured the altered signalings that GPR35 knocking down by Western blot assay. Results:We demonstrated that GPR35 expression was significantly elevated in NSCLC tissues and correlated with poor prognosis. GPR35 was upregulated in our in vitro chemoresistance cell model. GPR35 depletion reduced the half maximal inhibitory concentration of chemodrugs and restored the sensitivity both in vitro and in vivo. Mechanically, we found that GPR35-mediated chemoresistance occurred partially via β-arrestin-2/Akt signaling. Furthermore, inhibition of β-arrestin-2 or Akt activation could suppress the GPR35 expression and overcome chemoresistance. Conclusion:Our results suggested that GPR35 might serve as a novel therapeutic target to enhance the chemotherapy efficacy in NSCLC.

journal_name

Onco Targets Ther

journal_title

OncoTargets and therapy

authors

Wang W,Han T,Tong W,Zhao J,Qiu X

doi

10.2147/OTT.S175606

subject

Has Abstract

pub_date

2018-09-26 00:00:00

pages

6249-6257

issn

1178-6930

pii

ott-11-6249

journal_volume

11

pub_type

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