β2AR-HIF-1α-CXCL12 signaling of osteoblasts activated by isoproterenol promotes migration and invasion of prostate cancer cells

BMC Cancer

Shiyuan Xu¹  Zhibin Huang¹  Ruonan Gu¹  Zhishuai Zhang²  Fan Deng²  Xiaoju Lai²  Zhong-Kai Cui²  Guihuan Li²  Wenyang Wang²  Fangyin Zeng³ 

[1] Department of Anesthesiology, Zhujiang Hospital, Southern Medical University;Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University;Department of Clinical Laboratory, the Fifth Affiliated Hospital, Southern Medical University;

关键词: Chronic stress;    Cancer;    Bone metastasis;    Sympathetic nerve;   

DOI  :  10.1186/s12885-019-6301-1

来源: DOAJ

【 摘 要 】

Abstract Background Chronic stress is well known to promote tumor progression, however, little is known whether chronic stress-mediated regulation of osteoblasts contributes to the migration and invasion of metastatic cancer cells. Methods The proliferation, migration and invasion of prostate cancer cells were assessed by CCK-8 and transwell assay. HIF-1α expression of osteoblasts and epithelial-mesenchymal transition (EMT) markers of prostate cancer cells were examined by Western blot. The mRNA level of cytokines associated with bone metastasis in osteoblasts and EMT markers in PC-3 and DU145 cells were performed by qRT-PCR. Functional rescue experiment of cells were performed by using siRNA, plasmid transfection and inhibitor treatment. Results Isoproterenol (ISO), a pharmacological surrogate of sympathetic nerve activation induced by chronic stress, exhibited no direct effect on migration and invasion of PC-3 and DU145 prostate cancer cells. Whereas, osteoblasts pretreated with ISO promoted EMT, migration and invasion of PC-3 and DU145 cells, which could be inhibited by β2AR inhibitor. Mechanistically, ISO increased the secretion of CXCL12 via the β2AR-HIF-1α signaling in osteoblasts. Moreover, overexpression of HIF-1α osteoblasts promoted migration and invasion of PC-3 and DU145 cells, which was inhibited by addition of recombinant knockdown of CXCR4 in PC-3 and DU145 cells, and inhibiting CXCL12-CXCR4 signaling with LY2510924 blunted the effects of osteoblasts in response to ISO on EMT and migration as well as invasion of PC-3 and DU145 cells. Conclusions These findings demonstrated that β2AR-HIF-1α-CXCL12 signaling in osteoblasts facilitates migration and invasion as well as EMT of prostate cancer cells, and may play a potential role in affecting bone metastasis of prostate cancer.

【 授权许可】

Unknown