GPRC5A facilitates cell proliferation and bone metastasis of prostate cancer.

Prostate cancer is a high frequent disease. Early stage prostate cancer can be cured with high probability by early treatment, but hormone refractory prostate cancer and progressive prostate cancer is poor prognosis. Orphan GPCRs have the potential to become a drug discovery target in various carcinomas, but there are few reports in prostate cancer and there are still many possibilities. By big data analysis, we focused on the biological properties of the prostate cancer cell line and found GPRC5A from Orphan GPCR as one of the regulators of prostate cancer development. GPRC5A knock out by genomic editing in PC3, proliferative ability and bone metastasis was markedly suppressed. In prostate cancer cells, GPRC5A inhibit phosphorylation of CREB and affected the expression of cell cycle related genes. GPRC5A is also involved in the establishment of bone metastases, and correlated with prostate cancer metastasis and prognosis. These dates suggest that GPRC5A facilitates cell proliferation and progression of prostate cancer and can be a target for new prognostic marker or drug discovery of prostate cancer. Overall design: mRNA profiles of wild type PC3-Luc cells and two GPRC5A knockout PC3-Luc cells were generated by deep sequencing, in triplicate, using Illumina Miseq.