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Steroid sulfatase and estrogen sulfotransferase in human prostate cancer
Author(s) -
Nakamura Yasuhiro,
Suzuki Takashi,
Fukuda Tsuyoshi,
Ito Akihiro,
Endo Mareyuki,
Moriya Takuya,
Arai Yoichi,
Sasano Hironobu
Publication year - 2006
Publication title -
the prostate
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.295
H-Index - 123
eISSN - 1097-0045
pISSN - 0270-4137
DOI - 10.1002/pros.20426
Subject(s) - steroid sulfatase , prostate cancer , estrogen , lncap , prostate , cancer , medicine , endocrinology , cancer research , sulfotransferase , biology , steroid , enzyme , hormone , biochemistry
BACKGROUND Estrogen sulfotransferase (EST) and steroid sulfatase (STS) are known to be involved in in situ estrogen production in estrogen dependent human cancer such as breast cancer, but unknown in prostate cancer. MATERIALS AND METHODS We first examined whether these enzymes above were expressed and actually involved in estrogen production and metabolism in prostate cancer cell lines (LNCaP, DU‐145, and PC‐3). We than examined the expression of EST and STS in human prostate cancer tissues obtained from surgery (n = 52) using immunohistochemistry. RESULTS mRNAs of both enzymes were detected in all prostate cancer cell lines examined, and the synthesis of estrone (E 1 ) and estradiol (E 2 ) was also confirmed in these cell lines. In addition, STS immunoreactivity was detected in 44 cases (85%) and EST in 39 cases (75%), respectively. CONCLUSIONS STS and EST are expressed and may be involved in local production and metabolism of estrogens in human prostate cancers. Prostate 66: 1005–1012, 2006. © 2006 Wiley‐Liss, Inc.