Sulfated-polysaccharide fraction from red algae Gracilaria caudata protects mice gut against ethanol-induced damage |
| |
| Authors: | Silva Renan Oliveira dos Santos Geice Maria Pereira Nicolau Lucas Antonio Duarte Lucetti Larisse Tavares Santana Ana Paula Macedo Chaves Luciano de Souza Barros Francisco Clark Nogueira Freitas Ana Lúcia Ponte Souza Marcellus Henrique Loiola Ponte Medeiros Jand-Venes Rolim |
| |
| Institution: | LAFFEX-Laboratory of Experimental Physiopharmacology, Biotechnology and Biodiversity Center Research, Federal University of Piauí-CMRV, Parnaíba, PI, Brazil. renan.oliveira25@yahoo.com.br |
| |
| Abstract: | The aim of the present study was to investigate the gastroprotective activity of a sulfated-polysaccharide (PLS) fraction extracted from the marine red algae Gracilaria caudata and the mechanism underlying the gastroprotective activity. Male Swiss mice were treated with PLS (3, 10, 30 and 90 mg·kg(-1), p.o.), and after 30 min, they were administered 50% ethanol (0.5 mL/25 g(-1), p.o.). One hour later, gastric damage was measured using a planimeter. Samples of the stomach tissue were also obtained for histopathological assessment and for assays of glutathione (GSH) and malondialdehyde (MDA). Other groups were pretreated with l-NAME (10 mg·kg(-1), i.p.), dl-propargylglycine (PAG, 50 mg·kg(-1), p.o.) or glibenclamide (5 mg·kg(-1), i.p.). After 1 h, PLS (30 mg·kg(-1), p.o.) was administered. After 30 min, ethanol 50% was administered (0.5 mL/25 g(-1), p.o.), followed by sacrifice after 60 min. PLS prevented-ethanol-induced macroscopic and microscopic gastric injury in a dose-dependent manner. However, treatment with l-NAME or glibenclamide reversed this gastroprotective effect. Administration of propargylglycine did not influence the effect of PLS. Our results suggest that PLS has a protective effect against ethanol-induced gastric damage in mice via activation of the NO/K(ATP) pathway. |
| |
| Keywords: | polysaccharide gastric damage ethanol nitric oxide hydrogen sulfide |
| 本文献已被 PubMed 等数据库收录！ |
|
