Preventive Effect of an Extract of Terminalia avicennioides on Acetylcholine-Induced Tracheoconstriction in Wistar Strain Rats  

作　　者：Awa Ba-Diop Ndèye Absa Diaw Ibrahima Diouf Mbaye Sène Ouafae Kechaba Mamadou Sarr Modou Oumy Kane Awa Ba-Diop;Ndèye Absa Diaw;Ibrahima Diouf;Mbaye Sène;Ouafae Kechaba;Mamadou Sarr;Modou Oumy Kane(Physiology Laboratory, Department of Medicine, Alioune Diop University of Bambey, Bambey, Senegal;IRL3189 Environment, Health, Societies CNRS-UCAD Dakar, Senegal;Department of Physiology Laboratory, Faculty of Medicine, Cheikh Anta Diop University of Dakar, Dakar, Senegal;Department of Physiology Laboratory, Faculty of Medicine, UFR Sante, Assane SECK University of Ziguinchor, Ziguinchor, Senegal)

机构地区：[1]Physiology Laboratory, Department of Medicine, Alioune Diop University of Bambey, Bambey, Senegal [2]IRL3189 Environment, Health, Societies CNRS-UCAD Dakar, Senegal [3]Department of Physiology Laboratory, Faculty of Medicine, Cheikh Anta Diop University of Dakar, Dakar, Senegal [4]Department of Physiology Laboratory, Faculty of Medicine, UFR Sante, Assane SECK University of Ziguinchor, Ziguinchor, Senegal

出　　处：《Open Journal of Respiratory Diseases》2024年第2期60-68,共9页呼吸病期刊（英文）

摘　　要：Asthma is one of the most common chronic respiratory pathologies worldwide. The cost of its treatment, particularly for populations in developing countries like Senegal, requires an alternative which consists of developing research into new therapeutic approaches with the use of plants from traditional pharmacopoeia. The objective of this study was to determine whether the hydroalcoholic extract of Terminalia avicennioides leaves has a preventive effect on the constriction of tracheal smooth muscle induced by Acetylcholine in Wistar strain rats. Methods: The species used in our experiments were male Wistar rats aged between 12 and 14 weeks. Rings of rat trachea were suspended in isolated organ chambers connected to tension sensors. Two pharmacological agents were used: acetylcholine, for its constrictor effect and adrenaline, for its dilating effect on the pulmonary trachea. Our plant material consisted of a hydroalcoholic extract of Terminalia avicennioides leaves. The experimental protocol was that of the preventive model which consisted of impregnating these rings with the extract at a defined concentration then testing its contractility in the presence of Acetylcholine which was the contractile agonist used in this study. The preventive effect of the extract was studied with an Acetylcholine contraction range on rings pre-incubated with Terminalia avicennioides extract. Results: The results showed that Acetylcholine contracts the trachea and the increase in its contractility was dependent on the dose of Ach added cumulatively (10⁻⁵ to 4 × 10⁻⁵ mol/l). The administration of the hydroalcoholic extract of Terminalia avicennioides leaves led to a modification of the contractile response to Acetylcholine. Indeed, this extract induced a significant attenuation of the contractile responses of the treated tracheal rings compared to those untreated. Conclusion: Terminalia avicennioides had a relaxing effect on tracheal smooth muscle and this effect could play an important role in the preventAsthma is one of the most common chronic respiratory pathologies worldwide. The cost of its treatment, particularly for populations in developing countries like Senegal, requires an alternative which consists of developing research into new therapeutic approaches with the use of plants from traditional pharmacopoeia. The objective of this study was to determine whether the hydroalcoholic extract of Terminalia avicennioides leaves has a preventive effect on the constriction of tracheal smooth muscle induced by Acetylcholine in Wistar strain rats. Methods: The species used in our experiments were male Wistar rats aged between 12 and 14 weeks. Rings of rat trachea were suspended in isolated organ chambers connected to tension sensors. Two pharmacological agents were used: acetylcholine, for its constrictor effect and adrenaline, for its dilating effect on the pulmonary trachea. Our plant material consisted of a hydroalcoholic extract of Terminalia avicennioides leaves. The experimental protocol was that of the preventive model which consisted of impregnating these rings with the extract at a defined concentration then testing its contractility in the presence of Acetylcholine which was the contractile agonist used in this study. The preventive effect of the extract was studied with an Acetylcholine contraction range on rings pre-incubated with Terminalia avicennioides extract. Results: The results showed that Acetylcholine contracts the trachea and the increase in its contractility was dependent on the dose of Ach added cumulatively (10⁻⁵ to 4 × 10⁻⁵ mol/l). The administration of the hydroalcoholic extract of Terminalia avicennioides leaves led to a modification of the contractile response to Acetylcholine. Indeed, this extract induced a significant attenuation of the contractile responses of the treated tracheal rings compared to those untreated. Conclusion: Terminalia avicennioides had a relaxing effect on tracheal smooth muscle and this effect could play an important role in the prevent

关 键 词：Bronchial Hyperreactivity Extract Hydroalcoholic of Terminalia Avicennioides ASTHMA 

分 类 号：R28[医药卫生—中药学]