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2016 ; 12
(4
): 389-96
Nephropedia Template TP
Zhu H
; Guo S
; Zhang Y
; Yin J
; Yin W
; Tao S
; Wang Y
; Zhang C
Int J Biol Sci
2016[]; 12
(4
): 389-96
PMID27019624
show ga
The pHs of extracellular fluids (ECFs) in normal tissues are commonly maintained
at 7.35 to 7.45. The acidification of the ECF is one of the major characteristics
of tumour microenvironment. In this study, we report that decreased extracellular
pH promotes the transformation of mesenchymal stem cells (MSCs) into
cancer-associated fibroblasts (CAFs), termed CAF activation. Furthermore, we
demonstrate that GPR68, a proton-sensing G-protein-coupled receptor (GPCR), is
required for the pH-dependent regulation of the differentiation of MSCs into
CAFs. We then identify Yes-associated protein 1 (YAP) as a downstream effector of
GPR68 for CAF activation. Finally, we show that knockdown of GPR68 in MSCs can
prevent the CAF activation under cancer microenvironment. Systemic
transplantation of GPR68-silenced MSCs suppresses in-situ tumour growth and
prolong life span after cancer graft.
|Adaptor Proteins, Signal Transducing/genetics/*metabolism
[MESH]