Inhibition of Kir4.1 potassium channels by quinacrine.
Inhibition of Kir4.1 potassium channels by quinacrine.
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DOI:
10.1016/j.brainres.2017.03.009
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发表时间:
2017-05-15
期刊:
影响因子:
2.9
通讯作者:
Rodríguez-Menchaca AA
中科院分区:
文献类型:
--
作者:
Marmolejo-Murillo LG;Aréchiga-Figueroa IA;Cui M;Moreno-Galindo EG;Navarro-Polanco RA;Sánchez-Chapula JA;Ferrer T;Rodríguez-Menchaca AA
Inwardly rectifying potassium (Kir) channels are expressed in many cell types and contribute to a wide range of physiological processes. Particularly, Kir4.1 channels are involved in the astroglial spatial potassium buffering. In this work, we examined the effects of the cationic amphiphilic drug quinacrine on Kir4.1 channels heterologously expressed in HEK293 cells, employing the patch clamp technique. Quinacrine inhibited the currents of Kir4.1 channels in a concentration and voltage dependent manner. In inside-out patches, quinacrine inhibited Kir4.1 channels with an IC50 value of 1.8 ± 0.3 μM and with extremely slow blocking and unblocking kinetics. Molecular modeling combined with mutagenesis studies suggested that quinacrine blocks Kir4.1 by plugging the central cavity of the channels, stabilized by the residues E158 and T128. Overall, this study shows that quinacrine blocks Kir4.1 channels, which would be expected to impact the potassium transport in several tissues.
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影响因子:
12.8
作者:
Eriksson A;Österroos A;Hassan S;Gullbo J;Rickardson L;Jarvius M;Nygren P;Fryknäs M;Höglund M;Larsson R
通讯作者:
Larsson R
影响因子:
5.3
作者:
Djukic, Biljana;Casper, Kristen B.;McCarthy, Ken D.
通讯作者:
McCarthy, Ken D.
DOI:
10.1093/protein/4.8.903
发表时间:
1991-12-01
期刊:
PROTEIN ENGINEERING
影响因子:
--
作者:
MEHLER, EL;SOLMAJER, T
通讯作者:
SOLMAJER, T
DOI:
10.1186/1478-811x-9-13
发表时间:
2011-05-15
期刊:
Cell communication and signaling : CCS
影响因子:
--
作者:
Ehsanian R;Van Waes C;Feller SM
通讯作者:
Feller SM
影响因子:
3.6
作者:
Furutani, Kazuharu;Ohno, Yukihiro;Kurachi, Yoshihisa
通讯作者:
Kurachi, Yoshihisa