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17Beta-hydroxysteroid dehydrogenases in human endometrium and its disorders
Kiyoshi Ito1, Hiroki Utsunomiya, Takashi Suzuki
1Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Sendai, Japan.
Molecular and Cellular Endocrinology
|January 13, 2006
Summary
This study reveals that 17Beta-hydroxysteroid dehydrogenases (17-HSD) types 2 and 5 are key regulators of estrogen production in endometrial carcinoma. Their altered expression impacts hormone levels, influencing cancer development.
Area of Science:
- Endocrinology
- Oncology
- Molecular Biology
Background:
- In situ estrogen metabolism and synthesis are crucial in endometrial carcinoma development.
- 17Beta-hydroxysteroid dehydrogenases (17-HSDs) enzymes regulate active sex steroid formation, including estrone (E1) and estradiol (E2).
Purpose of the Study:
- To investigate the roles of 17-HSD types 2 and 5 in regulating in situ estrogen production within endometrial carcinoma.
- To correlate the expression levels of 17-HSD types 2 and 5 with estrogen concentrations and disease progression.
Main Methods:
- Analysis of 17-HSD type 2 and type 5 expression in normal endometrium, hyperplasia, and endometrial carcinoma tissues.
- Measurement of intratumoral estradiol (E2) concentration and 17-HSD type 2 mRNA levels.
Main Results:
- 17-HSD type 2 expression decreased progressively from normal endometrium to carcinoma.
- A significant inverse correlation was observed between intratumoral E2 levels and 17-HSD type 2 mRNA in endometrial carcinoma.
- 17-HSD type 5 expression significantly increased from normal endometrium to carcinoma.
Conclusions:
- 17-HSD type 2 and 17-HSD type 5 play critical roles in regulating local estrogen production in endometrial carcinoma.
- The altered expression patterns of these enzymes suggest their involvement in endometrial carcinogenesis.
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