Gastric ulcer is the most common gastrointestinal disorder affecting people globally.Although many drugs are available to treat ulcers, the mortality rate is relatively high, and drugs lack selectivity to treat ulcers without causing side effects. In this study, the potential therapeutic effects of phylloquinone were tested against indomethacininduced gastric ulcer in rats by giving rats a single oral dose of indomethacin (48 mg/kg), followed by phylloquinone (10 mg/kg) orally, once daily for six consecutive days. Phylloquinone significantly attenuated indomethacin-induced oxidative and inflammatory responses through hindering the inflammatory cascade by decreasing the levels of TNF-α, NF-κB, INOS and COX-2 which counteracts indomethacin effects. Also, it increased NAD + which enhanced SIRT-1 level. Furthermore, phylloquinone was effective in increasing mucus secretion, decreasing acid secretion, reversing histological effects caused by indomethacin and minimizing ulcer and lesion indices All these findings indicate that phylloquinone may be used in protection and treatment of indomethacin-induced gastric ulcer.
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