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Journal of Integrative Medicine ›› 2019, Vol. 17 ›› Issue (2): 115-124.doi: 10.1016/j.joim.2019.01.006

• Original Experimental Research • Previous Articles     Next Articles

Chenopodium ambrosioides induces an endothelium-dependent relaxation of rat isolated aorta

Asmae Assaidi a, Ikram Dib a, Monique Tits b, Luc Angenot b, Said Bellahcen a, Nourelhouda Bouanani a, Abdelkhaleq Legssyer a, Mohammed Aziz a, Hassane Mekhfi a, Mohammed Bnouham a, Michel Frederich b, Abderrahim Ziyyat a   

  1. a Laboratory of Physiology, Genetics and Ethnopharmacology, Department of Biology, Faculty of Sciences, Mohammed I University, Oujda 60000, Morocco
    b Laboratory of Pharmacognosy, Center for Interdisciplinary Research on the Medicines (CIRM), University of Liège, Liège B-4000, Belgium
  • Received:2018-06-01 Accepted:2018-12-27 Online:2019-03-06 Published:2019-05-17

Objective
This study aims to evaluate the vasodilatory effect of Chenopodium ambrosioides on the isolated rat aorta, and to explore its mechanism of action.
Methods
The vasorelaxant effect and the mode of action of various extracts from the leaves of C. ambrosioides were evaluated on thoracic aortic rings isolated from Wistar rats. In addition, ethyl acetate and methanol fractions were analyzed, using thin-layer chromatography and high-performance liquid chromatography techniques, for their polyphenolic content.
Results
The various active extracts of C. ambrosioides at four concentrations (10?3, 10?2, 10?1 and 1?mg/mL) relaxed the contraction elicited by phenylephrine, in a concentration-dependent manner. This effect seems to be endothelium-dependent, since the vasodilatory effect was entirely absent in denuded aortic rings. The vasorelaxant effect of the methanol fraction (MF) of C. ambrosioides at 1?mg/mL was also inhibited by atropine and tetraethylammonium. This effect remained unchanged by Nω-nitro-l-arginine methyl ester hydrochloride and glibenclamide. The preliminary phytochemical analysis showed that the leaves of C. ambrosioides are rich in phenolic and flavonoid derivatives.
Conclusion
These results suggest that the MF of C. ambrosioides produces an endothelium-dependent relaxation of the isolated rat aorta, which is thought to be mediated mainly through stimulation of the muscarinic receptors, and probably involving the opening of Ca2+-activated potassium channels.

Key words: Chenopodium ambrosioides, Chenopodiaceae, Vasorelaxation, Ca2+-activated potassium channels, Thin-layer chromatography, High-performance liquid chromatography, Plant, Complementary and alternative medicine

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