Effects of Reduction of MHCII Expression on M1 Polarity Activated HMC3 Microglia Cells By n-Hexane And Ethyl Acetate Fraction of Semanggi (Marsilea crenata Presl.) Leaves

Neuroinflammatory is a pathological condition in which neuronal cells experience progressive loss of function, one of which is due to estrogen deficiency. Phytoestrogens are compound that has structure and function similar to 17β-estradiol, the most potent natural form of estrogen. Semanggi (Marsilea crenata Presl.) is known to contain phytoestrogens which can replace the function of 17β-estradiol in maintaining organ homeostasis, so that is potential to be developed as an anti-neuroinflammatory drug. This study was aimed to prove the anti-neuroinflammatory effect of the n-hexane and ethyl acetate fraction of Semanggi leaves on HMC3 microglia cells, by measuring the expression of major histocompatibility complex II (MHC II). Both fractions with a concentration of 62.5; 125; and 250 μg/ml were administered to HMC3 microglia cells which had been induced by interferon gamma (IFN-γ) for 24 hours. Measurement of MHC II expression were using immunocytochemistry (ICC) methods and confocal laser scanning microscopy (CLSM) instruments. The results showed that n-hexane fraction could reduce MHC II expression at concentrations of 250 μg/ml with p<0.05, and showed a non-monotonic dose response (NMDR) pattern, while ethyl acetate fraction could reduce MHC II expression at all concentrations with p<0.05. Based on the results of the correlation test, the best anti-neuroinflammatory activity on HMC3 microglia cells is showed by the ethyl acetate fraction of Semanggi leaves.