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Effects of daurisoline on intracellular Ca2+ activity in myocardium

  
@article{APS6446,
	author = {Zhen-Xin Wang and Jie-Quan Zhu and Fan-Dian Zeng and Chong-Jia Hu and Yi-Long Ma and Shi-Ming Zhong},
	title = {Effects of daurisoline on intracellular Ca 2+  activity in myocardium},
	journal = {Acta Pharmacologica Sinica},
	volume = {17},
	number = {3},
	year = {2016},
	keywords = {},
	abstract = {AIM: To explain the effect of daurisoline (DS) on delayed afterdepolarization (DAD).
METHODS: Ca(2+)-sensitive microelectrode technic was used to record intracellular Ca2+ activity (alpha Cai) and triggered activity (TA) arising from DAD in myocardium.
RESULTS: Strophantin G 3 mumol.L-1 yielded an increase in resting myocardial alpha Cai by 0.19 +/- 0.11 mumol.L-1 and transient elevations of alpha Cai by 1.48 +/- 0.55 and 4.96 +/- 1.81 mumol.L-1, respectively during the development of DAD and TA. By pretreatment with DS or verapamil, strophantin G-caused elevations of the alpha Cai in resting and provoked myocardia were eliminated and TA disappeared. DS 50 mumol.L-1 reduced Na(+)-free medium-induced elevation of dog Purkinje fibrous alpha Cai and abolished caffeine-induced increase of dog myocardial alpha Cai.
CONCLUSIONS: DS inhibited DAD and TA by preventing an increase of alpha Cai via transmembrane Ca2+ entry and Ca2+ release from the reticulum.},
	issn = {1745-7254},	url = {http://www.chinaphar.com/article/view/6446}
}