Abstract
A traditional herbal prescription Kyung-Ok-Ko (KOK), composed of Rehmannia glutinosa Liboschitz var. purpurae, Lycium chinense, Aquilaria agallocha, Poria cocos, Panax ginseng, and honey, has been widely used in Oriental medicine as an invigorant for age-related diseases, such as amnesia and stroke. However, the beneficial value of KOK on uterine dysfunction related to hyperandrogenism is largely unknown. We investigated the effect of KOK (2.0 g/kg/day, per os) on endometrial abnormalities in a dehydroepiandrosterone (DHEA, subcutaneous)-induced polycystic ovary syndrome (PCOS) rat model. Preadministration of KOK significantly (p<0.05) decreased the elevated body weight, uterus weight, and endometrial thickness by PCOS induction, corresponding to reduced apoptosis and the infiltration of immune cells (CD4+ T cells, CD8+ T cells, and macrophages) in the endometrium. These results were associated with reduced mRNA expression of interleukin (IL)-1β, IL-6, IL-8, and matrix metalloproteinase-3 and increased mRNA expression of IGF-β1, transforming growth factor (TGF)-β, TGF-β1, and vascular endothelial growth factor in the uterus after DHEA injection. These multiple effects of KOK may synergistically prevent the development of endometrial abnormalities in DHEA-induced hyperandrogenism via anti-inflammatory action, indicating that KOK has preventive and therapeutic potential for suppressing PCOS.
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