Antitumour, Immunomodulatory activity and in silico studies of naphthopyranones targeting iNOS, a relevant target for the treatment of Helicobacter pylori infection - 20/09/18
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Graphical abstract |
Highlights |
• | The naphthopyranones showed immunomodulatory potential. |
• | Immunomodulation was reported by TNF-a, IL-6 and NO inhibition. |
• | Synergism was evidenced through iNOS inhibition and NO scavenging. |
• | Cytotoxic activity in AGS cell line was reported. |
Abstract |
The naphthopyranones paepalantine and 5-methoxy-3,4-dehydroxanthomegnin isolated from Paepalanthus sp, showed in previous studies antioxidant, anti-inflammatory, antitumour and antimicrobial potential, such as anti-Helicobacter pylori activity. H. pylori infection is one of the main causes of gastric cancer, causing an excessive inflammatory response through the neutrophils and macrophages infiltration, increasing the release of reactive species and thus inducing the production of pro-inflammatory mediators. In the present study, immunomodulatory activity of naphthopyranones in LPS-stimulated macrophages and cytotoxic action in gastric adenocarcinoma cell lines was evaluated. The potential of interaction of these substances in the iNOS binding site was investigated by molecular docking. Cytotoxic activity in gastric adenocarcinoma cells (AGS) was evaluated by the MTT assay. The results evidenced immunomodulatory potential by inhibiting the pro-inflammatory cytokines and nitric oxide produced by LPS-stimulated macrophages. Cytotoxic activity in AGS cell line was also reported. The results indicated that the studied naphthopyranones are viable alternatives in the treatment and prevention of H. pylori infection as well as the diseases related to this infection, especially gastric cancer.
Le texte complet de cet article est disponible en PDF.Keywords : Paepalantine, 5-Methoxy-3, 4-dehydroxanthomegnin, Nitric oxide synthase, Molecular docking, Gastric cancer
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Vol 107
P. 1160-1165 - novembre 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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