Expression of DJ-1 and mTOR in eutopic and ectopic endometria of patients with endometriosis and adenomyosis

Objective: Endometrial cells may aberrantly express molecules involved in invasion and migration, leading to endometriosis. The aim of this study was to investigate the expression of DJ-1 and phosphorylated mammalian target of rapamycin (p-mTOR) in ectopic and eutopic endometria of endometriosis and adenomyosis. Methods: Endometrial specimens were obtained from healthy non-menopausal women (n = 17) or patients with ovarian endometriotic cysts (n = 48) or adenomyosis (n = 30) during January 2011 to June 2012. The expressions of DJ-1 and p-mTOR were evaluated by immunohistochemistry and western blotting methods. Results: The expressions of DJ-1 and p-mTOR were significantly higher in the ectopic endometria than those in the eutopic endometria of endometriosis and adenomyosis patients or normal endometria (FDR < 0.05). DJ-1 expression was positively correlated with the p-mTOR expression no matter at endometriosis (r = 0.736, FDR < 0.001) or adenomyosis (r = 0.809, FDR < 0.001). Conclusion: DJ-1 protein may be involved in endometrial cells proliferation, migration and angiogenesis by modulating the PI3K/Akt/p-mTOR signaling pathway, which provides an underlying theoretical target for endometriosis and adenomyosis.