Steroid sulfatase and estrogen sulfotransferase in colon carcinoma: Regulators of intratumoral estrogen concentrations and potent prognostic factors

Ryuichiro Sato, Takashi Suzuki, Yu Katayose, Koh Miura, Kenichi Shiiba, Hiroo Tateno, Yasuhiro Miki, Junichi Akahira, Yukiko Kamogawa, Shuji Nagasaki, Kuniharu Yamamoto, Takayuki Ii, Shinichi Egawa, Dean B. Evans, Michiaki Unno, Hironobu Sasano

研究成果: Article査読

47 被引用数 (Scopus)

抄録

Previous epidemiologic and in vitro studies have indicated a potential involvement of estrogens in the pathogenesis of human colon carcinoma, but the precise roles of estrogens have remained largely unknown. Therefore, in this study, we first measured intratumoral concentrations of estrogens in 53 colon carcinomas using liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS). Tissue concentrations of total estrogen [estrone (E 1) + estradiol] and E 1 were significantly (2.0- and 2.4-fold, respectively) higher in colon carcinoma tissues than in nonneoplastic colonic mucosa (n = 31), and higher intratumoral concentrations of total estrogen and E 1 were significantly associated with adverse clinical outcome. Intratumoral concentration of total estrogen was significantly associated with the combined status of steroid sulfatase (STS) and estrogen sulfotransferase (EST), but not with that of aromatase. Thus, we subsequently examined the STS/EST status in 328 colon carcinomas using immunohistochemistry. Immunoreactivities for STS and EST were detected in 61% and 44% of the cases, respectively. The -/+ group of the STS/EST status was inversely associated with Dukes' stage, depth of invasion, lymph node metastasis, and distant metastasis and positively correlated with Ki-67 labeling index of the carcinomas. In addition, this -/+ group had significantly longer survival, and a multivariate analysis revealed the STS/EST status as an independent prognostic factor. Results from our present study showed that the STS/EST status of carcinoma tissue determined intratumoral estrogen levels and could be a significant prognostic factor in colon carcinoma, suggesting that estrogens are locally produced mainly through the sulfatase pathway and play important roles in the progression of the disease.

本文言語English
ページ(範囲)914-922
ページ数9
ジャーナルCancer Research
69
3
DOI
出版ステータスPublished - 2009 2 1

ASJC Scopus subject areas

  • 腫瘍学
  • 癌研究

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