Androgen-independent proliferation of LNCaP prostate cancer cells infected by xenotropic murine leukemia virus-related virus |
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| Authors: | Katsura Kakoki Haruka Kamiyama Mai Izumida Yuka Yashima Hideki Hayashi Naoki Yamamoto Toshifumi Matsuyama Tsukasa Igawa Hideki Sakai Yoshinao Kubo |
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| Affiliation: | 1. Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8523, Japan;2. Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki 852-8523, Japan;3. Department of Urology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8523, Japan;4. Department of Microbiology, National University of Singapore, Singapore |
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| Abstract: | Xenotropic murine leukemia virus-related virus (XMRV) is a novel gammaretrovirus that was originally isolated from human prostate cancer. It is now believed that XMRV is not the etiologic agent of prostate cancer. An analysis of murine leukemia virus (MLV) infection in various human cell lines revealed that prostate cancer cell lines are preferentially infected by XMRV, and this suggested that XMRV infection may confer some sort of growth advantage to prostate cancer cell lines. To examine this hypothesis, androgen-dependent LNCaP cells were infected with XMRV and tested for changes in certain cell growth properties. We found that XMRV-infected LNCaP cells can proliferate in the absence of the androgen dihydrotestosterone. Moreover, androgen receptor expression is significantly reduced in XMRV-infected LNCaP cells. Such alterations were not observed in uninfected and amphotropic MLV-infected LNCaP cells. This finding explains why prostate cancer cell lines are preferentially infected with XMRV. |
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| Keywords: | XMRV LNCaP cell Prostate cancer Androgen |
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