Overexpression of 17β-hydroxysteroid dehydrogenase type 1 increases the exposure of endometrial cancer to 17β-estradiol.

The Journal of Clinical Endocrinology and Metabolism
Karlijn M C CornelAndrea Romano

Abstract

The local interconversions between estrone (low activity) and 17β-estradiol (potent compound) by 17β-hydroxysteroid dehydrogenases (17β-HSDs) can lead to high 17β-estradiol generation in endometrial cancer (EC). Examine the balance between the 17β-HSDs reducing estrone to 17β-estradiol (types 1, 5, 12, and 7) and those oxidizing 17β-estradiol to estrone (2, 4, and 8), in EC. Reducing and oxidizing 17β-HSD activities (HPLC) and mRNA level (RT-PCR) were assessed in normal post-menopausal (n = 16), peritumoral endometrium (normal tissue beside cancer, n = 13), and 58 EC (29 grade 1, 18 grade 2, 11 grade 3). Grade 1 EC displayed a shifted estrone reduction/17β-estradiol oxidation balance in favor of 17β-estradiol compared with controls. This was more pronounced among estrogen receptor-α (ER-α)-positive biopsies. Type 1 17β-HSD mRNA (HSD17B1 gene expression, real time PCR) and protein levels (immunohistochemistry) were higher in ER-α-positive grade 1 EC than controls. The mRNA coding for types 4, 5, 7, 8, and 12 17β-HSD did not vary, whereas that coding for type 2 17β-HSD was increased in high-grade lesions compared with controls. Three-dimensional ex vivo EC explant cultures demonstrated that 17β-HSD type 1 generated 17β-estradiol ...Continue Reading

Citations

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Dec 26, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Teresa KasererDaniela Schuster
Aug 6, 2013·Molecular and Cellular Endocrinology·Tea Lanišnik Rižner
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Dec 8, 2016·Molecular and Cellular Endocrinology·Karlijn M C CornelAndrea Romano
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