SPRY2 deficiency mediates androgen autonomous CRPC

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SPRY2 deficiency mediates androgen autonomous CRPC SPRY2 deficiency mediates androgen autonomous CRPC ARepresentative immunoblot images for indicated proteins in lysates from indicated CWR22Res orthografts from 60‐days timed experiment. HSC70 is used a loading control.BRelative quantitation of PSA mRNA in CWR22Res prostate orthografts from 60‐days timed experiment (n = 5 mice per group; #P < 0.05 compared to Nsi mock; *P < 0.05 compared to respective Nsi treatment; ANOVA Tukey's test).CGSEA analysis showing steroid biosynthetic process gene enrichment in CWR22Res SPRY2‐deficient (Pool) cells compared to Nsi control cells.DSchematic presentation of androgen biosynthesis pathway.E, FSerum (E) and intra‐tumoral (F) testosterone from mice bearing indicated orthografts from 60‐days timed experiment measured using ELISA (n = 5 mice per group; *P < 0.05; ANOVA Tukey's test).GTotal cholesterol levels in indicated prostate orthografts from 60‐days timed experiment (n = 3 mice per group; *P < 0.05; ANOVA Tukey's test).HRelative quantitation of human 3‐β‐hydroxysteroid dehydrogenase (HSD3B1) mRNA in CWR22Res prostate orthografts from 60‐days timed experiment (n = 5 mice per group; *P < 0.05; ANOVA Tukey's test).IRepresentative immunoblot images for indicated proteins in lysates from control and SPRY2‐expressing LNCaP cells. HSC70 is used a loading control.JGrowth rate of HSD3B1 KO CWR22Res Nsi control and Pool stable SPRY2 KD cells relative to T0 in hormone‐depleted (CSS) medium with indicated treatments (n = 3; *P < 0.05 compared to CTRL VC at the indicated time; #P < 0.05 compared to all treatments at the indicated time; ANOVA Tukey's test).KImmunostaining for HER2 in HN and CRPC matched clinical prostate cancer sections represented as IHC scores (n = 35 pairs; *P < 0.0001; paired two‐tailed Student's t‐test).LRelative quantitation of HSD3B1 mRNA in Nsi and Pool (SPRY2 KD) CWR22Res prostate cancer cells with stable expression of shSc (shScram) or shHER2 (n = 3; *P < 0.05—shHER2 compared to respective shSc; unpaired two‐tailed Student's t‐test).MThe effects of HER2 knockdown on CWR22Res orthografts represented as tumour volume (n = 5 mice per group; #P < 0.05 for Nsi orthografts; *P < 0.05 for Pool orthografts; ANOVA Tukey's test).NRepresentative immunoblot images for indicated proteins in lysates from indicated CWR22Res orthografts from 60‐days timed experiment. HSC70 is used a loading control.Data Information: In (B, E–H, K, M), each data point represents one independent observation. In (J), each data point is mean of three independent observations. In (B, E–H, J–M), the data are presented as mean ± SD.Source data are available online for this figure. Rachana Patel et al. EMBO Mol Med. 2018;emmm.201708347 © as stated in the article, figure or figure legend