HSD11β1 promotes EMT-mediated breast cancer metastasis
Nakayama, J.; Ishikawa, T.; Nishimura, T.; Yamanaka, S.; Gotoh, N.; Yamauchi, C.; Onishi, T.; Soga, T.; Fujii, S.; Makinoshima, H.
Show abstract
Abnormal biosyntheses of steroid hormones and dysregulation of steroid hormone receptors contribute to breast cancer metastasis but the mechanisms of that are poorly understand. Here we report a stress hormone producing enzyme, Hydroxysteroid (11-Beta) Dehydrogenase 1 (HSD11{beta}1) promotes breast cancer metastasis. HSD11{beta}1 was ectopically expressed in seventy-one percent of triple-negative breast tumors and correlated with shorter overall survival. HSD11{beta}1 significantly promoted breast cancer metastasis through induction of epithelial-to-mesenchymal transition (EMT); conversely, pharmacologic and genetic inhibition of HSD11{beta}1 suppressed metastatic progression of breast cancer cells. Moreover, 11-hydroxyprogesterone (11-OHP) whom HSD11{beta}1 produced in breast cancer cells, conferred metastatic properties on non-metastatic breast cancer cells through induction of EMT. We identified Peroxisome Proliferator-activated Receptor Alpha (PPAR-) as essential for both HSD11{beta}1 and 11OHP-driven EMT. Knockdown of PPAR- induced MET on HSD11{beta}1-expressing breast cancer cells. Taken together, HSD11{beta}1 promotes breast cancer metastasis and would be a novel target for suppressing breast cancer metastasis.
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