Overexpression of Human Estrogen Biosynthetic Enzyme Hydroxysteroid (17beta) Dehydrogenase Type 1 Induces Adenomyosis-like Phenotype in Transgenic Mice

Taija Heinosalo, Kalle T Rytkönen, Niina Saarinen, Päivi Järvensivu, Pauliina Damdimopoulou, Leena Strauss, Satu Orasniemi, Petricia Horshauge, Michael Gabriel, Pasi Koskimies, Claes Ohlsson, Pauliina Kronqvist, Matti Poutanen
International journal of molecular sciences · 2022 · vol. 23(9) , pp. 4815 · doi:10.3390/ijms23094815 · PMID:35563206 · PMC9104619 · W4280572987
article OA: gold CC0 ⤵ 4 in-corpus citations
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Overexpression of human estrogen-synthesizing enzyme HSD17B1 in mice induced an adenomyosis phenotype that was reversed by HSD17B1 inhibitor treatment.

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Abstract

Hydroxysteroid (17beta) dehydrogenase type 1 (HSD17B1) is an enzyme that converts estrone to estradiol, while adenomyosis is an estrogen-dependent disease with poorly understood pathophysiology. In the present study, we show that mice universally over-expressing human estrogen biosynthetic enzyme HSD17B1 (HSD17B1TG mice) present with adenomyosis phenotype, characterized by histological and molecular evaluation. The first adenomyotic changes with endometrial glands partially or fully infiltrated into the myometrium appeared at the age of 5.5 months in HSD17B1TG females and became more prominent with increasing age. Preceding the phenotype, increased myometrial smooth muscle actin positivity and increased amount of glandular myofibroblast cells were observed in HSD17B1TG uteri. This was accompanied by transcriptomic upregulation of inflammatory and estrogen signaling pathways. Further, the genes upregulated in the HSD17B1TG uterus were enriched with genes previously observed to be induced in the human adenomyotic uterus, including several genes of the NFKB pathway. A 6-week-long HSD17B1 inhibitor treatment reduced the occurrence of the adenomyotic changes by 5-fold, whereas no effect was observed in the vehicle-treated HSD17B1TG mice, suggesting that estrogen is the main upstream regulator of adenomyosis-induced uterine signaling pathways. HSD17B1 is considered as a promising drug target to inhibit estrogen-dependent growth of endometrial disorders. The present data indicate that HSD17B1 over-expression in TG mice results in adenomyotic changes reversed by HSD17B1 inhibitor treatment and HSD17B1 is, thus, a potential novel drug target for adenomyosis.

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adenomyosis

MeSH descriptors

Adenomyosis Adenomyosis Adenomyosis Adenomyosis Adenomyosis Adenomyosis Animals Animals Animals Animals Estradiol Dehydrogenases Estradiol Dehydrogenases Estradiol Dehydrogenases Estradiol Dehydrogenases Estradiol Dehydrogenases Estradiol Dehydrogenases Estrogens Estrogens Estrogens Estrogens

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