RB1 and Familial prostate cancer: Results: In this study, patients with both downregulated RB1 and overexpressed Long non-coding RNAs (lncRNA) SSTR5-AS1 showed shorter time to castration-resistant prostate cancer (mean 23.6 ± 3.3 months) compared to other groups (mean 38.3 ± 4.9 months) (log-rank test, P = .028).