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- W2156583802 abstract "BACKGROUND Lentiviruses are retroviruses that can infect and stably integrate into the chromatin of non-dividing cells. The purpose of this study was to determine whether lentiviral vectors containing the probasin (PB) promoter displayed prostate-specific, androgen-regulated, and persistent gene expression. METHODS Three lentiviral-PB promoter/enhanced green fluorescent protein (EGFP)-reporter vectors together with a control lentiviral-CMV-EGFP, were tested by microscopy and flowcytometry for expression of EGFP after infection of human prostate cancer cells (LNCaP, PC-3, PC-3(hAR), and Du145 cells) and non-prostate cells (COS-1, HeLa, HeLa(hAR), and MCF-7 cells). RESULTS All cells infected in vitro with lentiviral-CMV vectors expressed EGFP, whereas with lentiviral-PB vectors (the most potent being Lv-ARR2PB), reporter expression was only observed in LNCaP cells with a small amount seen in androgen-independent PC-3 cells. Stable or transient transfection of androgen receptor only raised EGFP expression in prostate-derived cell lines, but did not change tumor specificity. With Lv-ARR2PB infected LNCaP cells, androgens regulated EGFP both in vitro and in vivo. After intra-tumor injection of this vector, EGFP expression was observed in LNCaP tumors, but not in A-549 lung or CaKi-2 kidney tumors. CONCLUSIONS Lv-ARR2PB may be an ideal vector for prostate-tumor targeting and for persistent, hormone-enhanced expression of a therapeutic gene to treat slow growing prostate tumors. © 2004 Wiley-Liss, Inc." @default.
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- W2156583802 date "2004-06-01" @default.
- W2156583802 modified "2023-09-26" @default.
- W2156583802 title "Prostate-tumor targeting of gene expression by lentiviral vectors containing elements of the probasin promoter" @default.
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- W2156583802 doi "https://doi.org/10.1002/pros.20010" @default.
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