The Brazilian Caatinga region, characterized by its unique semiarid climate, is home to a rich diversity of plant species with therapeutic potential. Among these, Syagrus coronata (Mart.) Becc stands out, traditionally used by the local population for its anti-inflammatory, wound-healing, and antimicrobial properties. Despite its popular use, no studies have yet investigated the pharmacological effects of the Syagrus coronata fixed oil (SCFO) on gastric health. This study investigated the antiulcerogenic activity of SCFO in experimental models of acute gastric ulcer in mice induced by absolute ethanol, acidified ethanol (60 % ethanol/0.3 M HCl), and indomethacin (30 mg/kg, s.c.) and in a chronic ulcer model induced by acetic acid. Furthermore, gastric volume, acidity, and mucus content were analyzed using a pyloric ligation model in rats. To investigate the mechanisms involved in gastroprotection, the participation of sulfhydryl compounds and nitric oxide (NO) was evaluated using the ethanol-induced ulcer model. Additionally, in silico pharmacokinetics, mucosal absorption, and molecular docking of SCFO components were analyzed to understand their interactions and efficacy. The results demonstrated that all tested doses of SCFO (150, 300, and 600 mg/kg) significantly reduced gastric lesions in a dose-dependent manner, with inhibition rates of 18.64 %, 28.88 %, and 33.86 %, respectively. Ranitidine (80 mg/kg), used as a positive control, promoted an inhibition of 5.22 %, a value comparable to that observed with the highest dose of SCFO. In the ulcer model induced by acidified ethanol, SCFO provided significant protection, with a reduction in lesions by 88.79 %, 95.55 % and 98.01 %, respectively, for increasing doses. Regarding the involvement of sulfhydryl compounds, there was no change in the cytoprotection generated by SCFO. However, the antiulcerogenic activity of SCFO appears to involve nitric oxide (NO) production, as its action was inhibited in animals receiving the NO blocker L-NAME (10 mg/kg). SCFO demonstrated notable healing effects on chronic gastritis and exhibited high gastrointestinal absorption (93 %-94 %) with no toxic interactions. Molecular docking revealed that SCFO’s compounds have significant affinity for proteins involved in inflammation, particularly inhibiting myeloperoxidase activity. Overall, SCFO proves to be an effective gastroprotective agent, supporting its traditional use and potential for promoting gastrointestinal health.
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