title: Farnesyl diphosphate synthase is abundantly expressed and regulated by androgen in rat prostatic epithelial cells.
abstract: Farnesyl diphosphate synthase (FPPS) has been identified as an androgen-response gene in the rat ventral prostate using a highly sensitive PCR-based cDNA subtraction technique. FPPS is an essential enzyme that catalyzes the synthesis of farnesyl diphosphate (FPP), which is required for cholesterol biosynthesis as well as protein prenylation. We have characterized the expression of FPPS in the rat prostate in response to androgen manipulation. Northern blot analysis showed that castration induced a 10-fold down-regulation of FPPS mRNA within 24 h in the ventral prostate and androgen replacement up-regulated FPPS mRNA rapidly in the regressed ventral prostate of a castrated rat. The expression of FPPS was also regulated by androgen in the lateral and dorsal prostate, indicating that FPPS is important to androgen action in all three lobes of the prostate. Western blot analysis showed that FPPS protein level was also regulated by androgen in the prostate. Northern blot analysis of tissue specificity indicated that FPPS was most abundantly expressed in the ventral prostate of a mature rat and was responsive to androgen manipulation in the prostate and seminal vesicles, but not in other tissues. In situ hybridization study showed that FPPS mRNA was localized to the prostatic epithelium. Interestingly, the expression of FPPS was elevated in Dunning rat prostate tumor cell lines. The above findings suggest that FPPS has the potential to play an important role in androgen action and prostate cancer progression.
authors.affiliation: Department of Urology, Tarry 11-715, Northwestern University Medical School, 303 East Chicago Avenue, Chicago, IL 60611, USA.
authors.forename: F
authors.initials: F
authors.lastname: Jiang
authors.forename: L
authors.initials: L
authors.lastname: Yang
authors.forename: X
authors.initials: X
authors.lastname: Cai
authors.forename: J
authors.initials: J
authors.lastname: Cyriac
authors.forename: I
authors.initials: I
authors.lastname: Shechter
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
mesh_terms: D019883:Alkyl and Aryl Transferases / Q000096:biosynthesis*; D000728:Androgens / Q000494:pharmacology; D000818:Animals; D004847:Epithelial Cells / Q000187:drug effects / Q000201:enzymology*; D015971:Gene Expression Regulation, Enzymologic; D051228:Geranyltranstransferase; D017403:In Situ Hybridization; D008297:Male; D009919:Orchiectomy; D011467:Prostate / Q000187:drug effects / Q000201:enzymology*; D011471:Prostatic Neoplasms / Q000201:enzymology; D051381:Rats; D017207:Rats, Sprague-Dawley; D012669:Seminal Vesicles / Q000187:drug effects / Q000201:enzymology; D014018:Tissue Distribution; D014407:Tumor Cells, Cultured
chemical_list: D000728:Androgens; D019883:Alkyl and Aryl Transferases; D051228:Geranyltranstransferase