Based on UPLC/MS/MS and Bioinformatics Analysis to Explore the Difference Substances and Mechanism of Curcumae Radix (Curcuma wenyujin) in Dysmenorrhea

Abstract Background : Curcumae Radix (CW) is traditionally used to treat dysmenorrhea caused by uterine spasm. However, the changes of its composition and anti‐uterine spasms during vinegar processing and the mechanism in treating dysmenorrhea are not clear. Objective : To elucidate the changes of anti‐uterine spasm and its substance basis, and the mechanism of treating dysmenorrhea before and after vinegar processing. Methods : The uterine spasm contraction model was established, and the uterine activity and its inhibition rate were calculated to evaluate the differences. The main chemical constituents of CW were quickly analyzed by UPLC‐Q‐TOF‐MS/MS technology, and the differences between them were explored by multivariate statistical analysis. Then, the regulatory network of “active ingredients‐core targets‐signal pathways” related to dysmenorrhea was constructed by using network pharmacology, and the combination between differential active components and targets was verified by molecular docking. Results : CW extract relaxed the isolated uterine by reducing the contractile tension, amplitude, and frequency. Compared with CW, the inhibitory effect of vinegar products was stronger, and the inhibition rate was 70.08 %. 39 compounds were identified from CW and 13 differential components were screened out ( p <0.05). Network pharmacology screened 11 active components and 32 potential targets, involving 10 key pathways related to dysmenorrhea. The results of molecular docking showed that these differentially active components had good binding activity to target. Conclusion : It was preliminarily revealed that CW could treat dysmenorrhea mainly through the regulation of inflammatory reaction, relaxing smooth muscle and endocrine by curcumenone, 13‐hydroxygermacrone, (+)‐cuparene, caryophyllene oxide, zederone, and isocurcumenol.