Interleukin-17 receptor-like gene is a novel antiapoptotic gene highly expressed in androgen-independent prostate cancer

Zongbing You, Xu Bao Shi, Grayson DuRaine, Dominik Haudenschild, Clifford G. Tepper, Su Hao Lo, Regina Gandour-Edwards, Ralph W. De Vere White, A. Hari Reddi

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We have recently identified a new gene, interleukin-17 receptor-like (IL-17RL), which is expressed in normal prostate and prostate cancer. This investigation is focused on the role of IL-17RL in prostate cancer. We found that IL-17RL was expressed at significantly higher levels in several androgen-independent prostate cancer cell lines (PC3, DU145, cds1, cds2, and cds3) and tumors compared with the androgen-dependent cell lines (LNCaP and MLC-SV40) and tumors. In an in vivo model of human prostate tumor growth in nude mice (CWR22 xenograft model), IL-17RL expression in tumors was induced by androgen deprivation. The relapsed androgen-independent tumors expressed higher levels of IL-17RL compared with the androgen-dependent tumors. Overexpression of IL-17RL in tumor necrosis factor α (TNFα)-sensitive LNCaP cells inhibited TNFα-induced apoptosis by blocking activation of caspase-3 downstream to caspase-2 and caspase-8. Reciprocally, knocking down IL-17RL expression by small interfering RNA induced apoptosis in all the prostate cancer cell lines studied. Taken together, these results show that IL-17RL is a novel antiapoptotic gene, which may confer partially the property of androgen-independent growth of prostate cancer by promoting cell survival. Thus, IL-17RL is a potential therapeutic target in the treatment of prostate cancer.

Original languageEnglish (US)
Pages (from-to)175-183
Number of pages9
JournalCancer research
Issue number1
StatePublished - Jan 1 2006

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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