Abstract:
:Recent evidence has implicated the transmembrane co-receptor neuropilin-1 (NRP1) in cancer progression. Primarily known as a regulator of neuronal guidance and angiogenesis, NRP1 is also expressed in multiple human malignancies, where it promotes tumor angiogenesis. However, non-angiogenic roles of NRP1 in tumor progression remain poorly characterized. In this study, we define NRP1 as an androgen-repressed gene whose expression is elevated during the adaptation of prostate tumors to androgen-targeted therapies (ATTs), and subsequent progression to metastatic castration-resistant prostate cancer (mCRPC). Using short hairpin RNA (shRNA)-mediated suppression of NRP1, we demonstrate that NRP1 regulates the mesenchymal phenotype of mCRPC cell models and the invasive and metastatic dissemination of tumor cells in vivo. In patients, immunohistochemical staining of tissue microarrays and mRNA expression analyses revealed a positive association between NRP1 expression and increasing Gleason grade, pathological T score, positive lymph node status and primary therapy failure. Furthermore, multivariate analysis of several large clinical prostate cancer (PCa) cohorts identified NRP1 expression at radical prostatectomy as an independent prognostic biomarker of biochemical recurrence after radiation therapy, metastasis and cancer-specific mortality. This study identifies NRP1 for the first time as a novel androgen-suppressed gene upregulated during the adaptive response of prostate tumors to ATTs and a prognostic biomarker of clinical metastasis and lethal PCa.
journal_name
Oncogenejournal_title
Oncogeneauthors
Tse BWC,Volpert M,Ratther E,Stylianou N,Nouri M,McGowan K,Lehman ML,McPherson SJ,Roshan-Moniri M,Butler MS,Caradec J,Gregory-Evans CY,McGovern J,Das R,Takhar M,Erho N,Alshalafa M,Davicioni E,Schaeffer EM,Jenkins RBdoi
10.1038/onc.2016.482subject
Has Abstractpub_date
2017-06-15 00:00:00pages
3417-3427issue
24eissn
0950-9232issn
1476-5594pii
onc2016482journal_volume
36pub_type
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