Zinc salt enhances gastroprotective activity of risperidone in indomethacin-induced gastric ulcer

Sažetak

Background: Zinc has been reported to mediate cellular responses to injury by producing cytoprotection via the scavenging of reactive oxygen species. Anti-stress medications are generally anti psychotic drugs and antidepressants. Some Anti-psychotic drugs such as risperidone have been reported to possess anti-ulcer activity. Risperidone as an antipsychotic drug blocks several neurotransmitter systems including dopaminergic, adrenergic, histaminergic and serotonergic pathways.

Method: The study investigated the antiulcer activity of Zinc Chloride (ZnCl2 ) in combination with risperidone in male Wistar rats. The animals were divided into two groups of twenty animals each for ZnCl2 and risperidone groups. Each group was further divided into four subgroups. ZnCl2 was administered orally at 20mg/kg, 40mg/kg and 80mg/kg to a subgroup, while 80mg/kg of ZnCl2 was administered in combination with risperidone (0.1mg/kg, 0.3mg/kg and 0.5mg/kg) orally once daily for 21 days. The controls were treated with distilled water. Ulcer was induced using indomethacin. Histology of the stomach tissues was prepared with PAS and H& E stains. Ulcer score and ulcer area were assessed using standard methods. Data were analysed using student t-test and Graphpad Prism 5.

Results: There were decreases in ulcer scores using the different doses of ZnCl2 (20mg/kg, 40mg/kg and 80mg/kg). Also using the highest dose ZnCl2 (80mg/kg) and different doses of risperidone,
there were decreases in ulcer scores compared to the control. This effect of the risperidone showed a significant dose-dependent reduction. The effect ZnCl2 and risperidone were also reflected in the ulcer area and in the histology.

Conclusion: These findings suggest that ZnCl2 enhances the gastroprotective activity of risperidone in indomethacin-induced gastric ulcer. However, more detailed studies are necessary to confirm the relevance of this finding and its implications in clinical settings.

Key words: risperidone, gastric, anti-ulcer, gastroprotection, zinc

Résumé
Contexte: Le zinc a été rapporté à entremettre des réponses cellulaires aux blessures en produisant une cyto-protection par le piégeage des espèces réactives de l'oxygène. Les médications antistress sont généralement des médicaments antipsychotiques et antidépresseurs. Certains médicaments antipsychotiques tels que la risperidone ont été rapportés comme possédant une activité antiulcéreuse. La risperidone entant qu'un médicamentantipsychotique bloque plusieurs systèmes de neurotransmetteurs, y comprisles voies dopaminergiques, adrénergiques, histaminergiques et sérotoninergiques.

Méthode: L'étude examine l'activité antiulcéreusedu chlorure de zinc (ZnCl2) en combinaison avec la risperidone chez les rats mâles Wistar. Les animaux ont été divisés en deux groupes de vingt animaux chaque pour les groupes ZnCl2 et risperidone. Chaque groupe a en plus été divisé en quatre sous-groupes. Le ZnCl2 a été administré par voie orale à 20 mg / kg, 40 mg / kg et 80 mg / kg à un sous-groupe, tandis que 80 mg / kg de ZnCl2 a été administré en combinaison avec la risperidone (0,1 mg / kg, 0,3 mg / kg et 0,5 mg / kg) par voie oraleune fois par jour pendant 21 jours. Les témoins ont été traités avec de l'eau distillée. Ulcère a été induite en utilisant l'indométacine. L'histologie des tissus de l'estomac a été préparée avec destaches PAS et H&E.Le score de l'ulcère et la surface de l'ulcère ont été évalués en utilisant des méthodes standard. Les données ont été analysées en utilisant le test d'étudiant t et le Prisme Graph Pad 5.

Résultats: Il y avait des diminutions des scores de l'ulcère en utilisant les différentes doses du ZnCl2 (20mg / kg, 40mg / kg et 80 mg / kg). En utilisant également la dose la plus élevéeZnCl2 (80 mg / kg) et différentes doses de risperidone, il y avait des diminutions des scores de l'ulcère par rapport au témoin. Cet effet de la risperidone a montré une réduction dose-dépendante significative. L'effetZnCl2 et risperidone ont également été pris en compte dans la surface de l'ulcère et dans l'histologie.

Conclusion: Ces résultats suggèrent que ZnCl2 augmente l'activité gastro-protective de risperidone dans l'ulcère gastrique induite par l'indométacine. Cependant, des études plus détaillées sont nécessaires pour confirmer la pertinence de cette constatation et ses implications dans les milieux cliniques.

Mots clés: Risperidone, gastrique, antiulcéreux, gastro-protection, zinc

Correspondence: Dr. C. Onwuchekwa, Department of Physiology, Usmanu Danfodiyo University, Sokoto, Nigeria. Email: chinedukwa@yahoo.com

pdf (engleski)

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Onwuchekwa C and Oluwole FS. Evaluation of the anti-gastric ulcer activity of risperidone in male rats.. Pharmacologyonline 2015; 2: 52-58