@article{APS9065,
author = {Ming-Hua Li and Yue-Feng Wang and Xue-Qin Chen and Nai-Xia Zhang and Hou-Ming Wu and Guo-Yuan Hu},
title = {BmTx3B, a novel scorpion toxin from Buthus martensi Karsch, inhibits delayed rectifier potassium current in rat hippocampal neurons},
journal = {Acta Pharmacologica Sinica},
volume = {24},
number = {10},
year = {2016},
keywords = {},
abstract = {AIM: To examine the effect of BmTx3B, a novel short-chain peptide isolated from the venom of Asian scorpion Buthus martensi Karsch, on voltage-gated potassium channels.
METHODS: Two types of voltage-dependent potassium currents were recorded from dissociated hippocampal neurons of neonatal rat in whole-cell voltage-clamp mode, and separated based upon their kinetic properties.
RESULTS: BmTx3B (10-100 micromol/L) selectively inhibited the delayed rectifier potassium current (I(K)), without affecting the fast transient potassium current (I(A)). The inhibition of the peptide on I(K) was reversible, concentration-dependent and voltage-independent. BmTx3B did not affect the steady-state activation and inactivation kinetics of the current.
CONCLUSION: The short-chain scorpion peptide BmTx3B selectively blocked the delayed rectifier potassium channel.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/9065}
}