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Effects of benzyltetrahydropalmatine on rat portal vein and guinea pig myocardium

   
@article{APS6164,
	author = {Guo-Jin Xia and Wei-Xing Yao and Da Song and Ming-Xing Jiang},
	title = {Effects of benzyltetrahydropalmatine on rat portal vein and guinea pig myocardium},
	journal = {Acta Pharmacologica Sinica},
	volume = {13},
	number = {3},
	year = {2016},
	keywords = {},
	abstract = {In isolated rat portal vein, benzyltetrahydrophalmatine (BTHP) 0.3-100 mumol.L-1 dose-dependently increased the spontaneous mechanical activity. However, BTHP 300 mumol.L-1 showed an inhibitory effect on the spontaneous contraction. BTHP 200 mumol.L-1 reversed positive staircase phenomenon to negative ones in left atrium of guinea pig and inhibited the amplitude and Vmax and shortened the action potential duration (APD50) of the slow action potentials induced by high K+ (24 mmol.L-1) in guinea pig papillary muscles. BTHP reduced also the contractile force in papillary muscles of guinea pig. These results suggest that BTHP possesses calcium antagonistic effect in high concentration.},
	issn = {1745-7254},	url = {http://www.chinaphar.com/article/view/6164}
}