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Therapeutic potentials of the natural plant flavonoid apigenin in polycystic ovary syndrome in rat model: via modulation of pro-inflammatory cytokines and antioxidant activity

Abstract Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women of reproductive age, which is associated with increased androgens, chronic inflammation, and oxidative stress. Current research aims at determining the effect of flavonoid apigenin on the level of antioxidant and anti-inflammatory factors in ovarian tissue of rats with PCOS. In this study, 32 female Wistar rats were divided into four groups (n = 8): control, PCOS control, and treated groups (20 and 40 mg/kg apigenin). After 21 days of intervention, the serum levels of sex hormones and gonadotropins were measured. The ovarian tissue was removed for biochemical and histological studies. Research findings indicated that apigenin causes significant decrease in estrogen, testosterone levels, LH and LH to FSH ratio, and significant increase in progesterone and FSH levels in serum of treated groups compared to PCOS control group. Different doses of apigenin significantly decreased the inflammatory cytokines tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and total oxidative status (TOS). The total antioxidant capacity (TAC) and superoxide dismutase (SOD) activity significantly increased in treated groups compared to the PCOS control group. The histological results indicated that the number of cysts and theca layer thickness significantly decreased and the number of corpora lutea and granulosa layer thickness significantly increased in the rats receiving the apigenin as compared to the PCOS control group. Flavonoid apigenin through antioxidant and anti-inflammatory properties can be used as an alternative method for treating patients with PCOS.