Inhibition of TRPM3 by primidone provides a potential therapeutic method for adenomyosis management

Abstract Purpose To test the expression profile of transient receptor potential channels (TRPs) in adenomyosis patients and evaluate the effects of primidone on tamoxifen-induced adenomyosis mice. Methods Eutopic endometrium from adenomyosis patients (n = 20) was collected and subjected to mRNA analysis of TRP channels. TRPA1, TRPV1 and TRPM3 in adenomyosis patients (n = 50) and tamoxifen-induced adenomyosis mice (n = 6) were examined by immunohistochemistry. From 10 weeks after birth, primidone (2 mg/kg/d) and atosiban (1 mg/kg/d) were given separately to adenomyotic mice by intraperitoneal injection for 3 weeks. The hotplate test was conducted once a week beginning at 10 weeks, and then uterine samples were harvested for HE staining and RNA-seq at 13 weeks. Results The mRNA expression of 15 TRPs was significantly increased in the proliferative phase of the adenomyotic endometrium. TRPV1, TRPM3 or TRPA1 staining levels were positively correlated with dysmenorrhea severity, menses amount and uterine size. In tamoxifen-induced adenomyosis mice, primidone had a significant effect on both the depth of myometrial infiltration and analgesia. Forty-seven DEGs were identified after primidone treatment, and bioinformatics analysis predicted that they were enriched in the cell cycle and cell division. Conclusion The expression profile of TRP channels varies significantly in adenomyosis patients, and primidone may provide a potential therapeutic method for adenomyosis management.