@article{APS4208,
author = {Hong Wang and Qi-sheng Liang and Lan-ren Cheng and Xiao-hong Li and Wei Fu and Wen-tao Dai and Shi-tong Li},
title = {Magnesium sulfate enhances non-depolarizing muscle relaxant vecuronium action at adult muscle-type nicotinic acetylcholine receptor in vitro},
journal = {Acta Pharmacologica Sinica},
volume = {32},
number = {12},
year = {2016},
keywords = {},
abstract = {Aim: To investigate the effect of magnesium sulfate and its interaction with the non-depolarizing muscle relaxant vecuronium at adult muscle-type acetylcholine receptors in vitro.
Methods: Adult muscle-type acetylcholine receptors were expressed in HEK293 cells. Drug-containing solution was applied via a gravity-driven perfusion system. The inward currents were activated by brief application of acetylcholine (ACh), and recorded using whole-cell voltage-clamp technique.
Results: Magnesium sulfate (1–100 mmol/L) inhibited the inward currents induced ACh (10 μmol/L) in a concentration-dependent manner (IC50=29.2 mmol/L). The inhibition of magnesium sulfate was non-competitive. In contrast, vecuronium produced a potent inhibition on the adult muscle-type acetylcholine receptor (IC50=8.7 nmol/L) by competitive antagonism. Magnesium sulfate at the concentrations of 1, 3, and 6 mmol/L markedly enhanced the inhibition of vecuronium (10 nmol/L) on adult muscle-type acetylcholine receptors.
Conclusion: Clinical enhancement of vecuronium-induced muscle relaxation by magnesium sulfate can be attributed partly to synergism between magnesium sulfate and non-depolarizing muscle relaxants at adult muscle-type acetylcholine receptors.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/4208}
}