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Vasorelaxant and chemical fingerprint studies of Citrus reticulatae pericarpium extracts

作者 Tan, Chu Shan; Loh, Yean Chun; Ch''ng, Yung Sing; Ng, Chiew Hoong; Yeap, Zhao Qin; Ahmad, Mariam; Asmawi, Mohd Zaini; Yam, Mun Fei

期刊 JOURNAL OF ETHNOPHARMACOLOGY , MAR 25 2019,:232

DOI 10.1016/j.jep.2018.12.014 PubMed 30543913

摘要 Ethnopharmacological relevance: Citrus reticulatae Pericarpium (Chen pi) was widely used as an important ingredient in the prescription of TCM to treat phlegm fluid retention type hypertension. Since Chen pi is involved in treatment as antihypertensive TCM formula, we have reasonable expectation in believing that it might possess vasorelaxant activity.Aim of the study: This study is designed to investigate the vasorelaxant effect of Chen pi and to study its pharmacology effects.Materials and methods: The vasorelaxant effect of water extract of Chen pi (CRW) were evaluated on thoracic aortic rings isolated from Sprague Dawley rats. The fingerprint of Chen pi and the extracts were developed with quantification of hesperidin content by HPTLC.Results: CRW exhibited the strongest vasorelaxant activity. CRW caused the relaxation of the phenylephrine precontracted aortic rings in the presence and absence of endothelium as well as in potassium chloride pre-contracted endothelium-intact aortic ring. The incubation of propranolol (li-adrenergic receptor blacker), atropine (muscarinic receptor blacker), Nra-nitro-L-arginine methyl ester (NO synthase inhibitor), ODQ (sGC inhibitor), indomethacin (COX inhibitor), 4-aminopyridine (K-v blocker), barium chloride (K-ir blocker), and glibenclamide (K-ATP blocker) significantly reduced the vasorelaxant effects of CRW. CRW was also found to be active in reducing Ca2+ releases from the sarcoplasmic reticulum and suppressing the voltage-operated calcium channels.Conclusion: The vasorelaxant effect of CRW on rat aorta involves NO/sGC, calcium and potassium channels, muscarinic and -adrenergic receptors.

涉及物种 柑橘 Citrus reticulata