Antifungal Activity of the Extract from Paeonia japonica against Candida albicans / 대한의진균학회지

BACKGROUND: Candida albicans is one of the normal flora of the skin, mucous membranes and gastrointestinal tract. Vaginal candidiasis remains a significant problem in women of childbearing age, majority of the cases are caused by C. albicans and recurrence is common in spite of topical treatment. OBJECTIVE: The purpose of this study is to develop the antifungal agent from the medicinal herbs traditionally used in Korea. METHODS: In this study, extracts from roots of Paeonia japonica were examined for antifungal activities against C. albicans. Dried roots of Paeonia japonica were extracted with dichloromethane, methanol, water respectively and serially. Liquid column chromatography and thin layer chromatography were used to separate the fractions with antifungal activity, and mass spectrometric analysis was done to determine the mass. RESULTS: Dichloromethane extract showed the highest antifungal activity aginst C. albicans. Result of fractionation and mass spectrometric analysis revealed that there were six materials: propanal, cytidine, hexadecanoic acid, cholesterol, octadecanoic acid and a unidentified material. CONCLUSION: Dichloromethane extract from Paeonia japonica could be a candidate for a new antifungal agent against C. albicans.

Characteristics of B Cell proliferation by polysaccharide fraction of Paeonia japonica miyabe

BACKGROUND: Paeonia j ap onica Miyabe is a medicinal plant which has been widely used as a component of blood-building decoctions (Chinese medicinal concept : Bu-Xie). The immunopharmacological characteristics of the extract of Paeonia j ap onica (PJ) were investigated. METHODS: The effects of fractions of PJ extract on lymphocyte proliferation were measured by H3 -thymidine incorporation assay . The proliferated lymphocyte subsets were analyzed in flow cytometry . The subset cell populations of spleen cells were separated by magnetic cell separation system, and their proliferation by the extract were investigated. The effect of the extract on antibody production was determined in mice challenged with sheep red blood cells (SRBC) using hemolytic plaque forming cell assay. RESULTS: Spleen cells were proliferated by water extract of PJ. Polysaccharide fraction (PJ-P) of the extract was most active in the proliferation. It was found in flow cytometry that the lymphocyte subset proliferated by PJ-P was B cell population. Among the separated subset cell populations, T cell-depleted cell population and macrophage-depleted cell population were most proliferated by PJ-P. However, positively selected populations of B cells and T cells were not proliferated by PJ-P. These result s indicate that B cell proliferation by PJ-P may require the assistance of macrophages or T cells. These result s suggest that firstly PJ-P may stimulate macrophages or T cells, and then B cells are activated. The number of antibody-secreting cells was increased by administration of PJ-P in mice immunized with SRBC as a T-dependent antigen. CONCLUSION: These result s suggest that macrophages and accessory cells are directly activated by PJ-P and then helper T cells and B cells are indirectly activated. As the results, immune responses might be coordinately improved. In conclusion, PJ-P, a polysaccharide of P. j ap onica, may be a characteristic immunostimulator, which is analogous to polysaccharides such as lentinan, PSK and ginsan.