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To investigate the effects of formononetin on rats with gastric ulcer and further to explore its possible mechanism. Rats were randomly divided into sham operation group (Sham), model group (Model), omeprazole control group (Omeprazole) and formononetin in different dose groups (FOR-L, FOR-M, FOR-H). Rats model with gastric ulcer were established by 100% glacial acetic acid. Hematoxylin–eosin (H&amp;E) staining was used to observe the pathological morphology of gastric mucosa. Immunohistochemistry and enzyme-linked immunosorbent assay (ELISA) were used to detect the level of inflammatory and angiogenesis related factors. The expressions of nuclear factor kappa-B (NF-κB) signaling pathway-related proteins were detected by western blot. Formononetin and omeprazole could ameliorate the pathological morphology of gastric mucosa in gastric ulcer rats. Compared with Model group, the levels of tumor necrosis factor (TNF)-α, Interleukin (IL)-1β, IL-6, myeloperoxidase (MPO), human endothelin (ET)-1 and p-P65 protein in formononetin treatment and omeprazole groups were significantly decreased ( p  &lt; 0.05). Moreover, formononetin could increase the content of vascular endothelial growth factor (VEGF), nitric oxide (NO) and the levels of CD34, tight junction proteins (ZO-1 and occludin) and p-IκBα in a dose-dependent manner. Formononetin can ameliorate gastric ulcer in rats by inhibiting inflammation and promoting gastric mucosal angiogenesis, and its mechanism maybe related to NF-κB signaling pathway.

Formononetin inhibits inflammation and promotes gastric mucosal angiogenesis in gastric ulcer rats through regulating NF-κB signaling pathway