title: UPLC-DAD/Q-TOF-MS Based Ingredients Identification and Vasorelaxant Effect of Ethanol Extract of Jasmine Flower.
abstract: Chinese people commonly make jasmine tea for recreation and health care. Actually, its medicinal value needs more exploration. In this study, vasorelaxant effect of ethanol extract of jasmine flower (EEJ) on isolated rat thoracic aorta rings was investigated and [Ca(2+)] was determined in vascular smooth muscle cells by laser scanning confocal microscope (LSCM). The result of aorta rings showed that EEJ could cause concentration-dependent relaxation of endothelium-intact rings precontracted with phenylephrine or KCl which was attenuated after preincubation of the rings with L-NAME and three different K(+) channel inhibitors; however, indomethacin and glibenclamide did not affect the vasodilatation of EEJ. In addition, EEJ could inhibit contraction induced by PE on endothelium-denuded rings in Ca(2+)-free medium as well as by accumulation of Ca(2+) in Ca(2+)-free medium with high K(+). LSCM also showed that EEJ could lower the elevated level of [Ca(2+)] induced by KCl. These indicate that the vasodilation of EEJ is in part related to causing the release of nitric oxide, activation of K(+) channels, inhibition of influx of excalcium, and release of calcium from sarcoplasmic reticulum. A total of 20 main ingredients, were identified in EEJ by UPLC-DAD/Q-TOF-MS. The vasodilation activity should be attributed to the high content of flavonoid glycosides and iridoid glycosides found in EEJ.
authors: Department of Pharmacology, Tianjin Medical University, Tianjin 300070, China.
authors: Yongqiang
authors: Y
authors: Yin
authors: College of Pharmacy, Nankai University, Tianjin 300071, China.
authors: Xuhui
authors: X
authors: Ying
authors: Center of Functional Experiment Teaching and Key Laboratory of Cancer Prevention Research, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, China.
authors: Hairong
authors: H
authors: Luan
authors: Department of Pharmacy, Tianjin Union Medical Center, Tianjin 300121, China.
authors: Zhenying
authors: Z
authors: Zhao
authors: Department of Pharmacology, Tianjin Medical University, Tianjin 300070, China.
authors: Jianshi
authors: J
authors: Lou
authors: Center of Functional Experiment Teaching and Key Laboratory of Cancer Prevention Research, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, China.
authors: Deli
authors: D
authors: Wang
authors: Center of Functional Experiment Teaching and Key Laboratory of Cancer Prevention Research, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, China.
authors: Hailin
authors: H
authors: Li
authors: Department of Pharmacology, Tianjin Medical University, Tianjin 300070, China ; Center of Functional Experiment Teaching and Key Laboratory of Cancer Prevention Research, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, China.
authors: Hong
authors: H
authors: Wu
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