potassium current

Dronedarone (SR 33589) is an amiodarone analogue which has an effective and promising treatment for Atrial fibrillation.

Ifenprodil is a selective NMDA receptor (glutamate) antagonist.

1. Resibufogenin (Bufogenin) is a cytotoxic steroid isolated from the Chinese drug ChanSu. 2. Resibufogenin can inhibit rectifier potassium current ( I K ) and transient potassium current ( I A ), it has pathological effects on central nervous system. 3. Resibufogenin corrects hypertension in a rat model of human preeclampsia, it not only prevents the advent of hypertension and proteinuria, but also the development of intrauterine growth restriction.4. Resibufogenina's major metabolic pathway in the human liver is CYP3A4 dominantly mediated 5β-hydroxylation .

Chlorahololide C is a potent and selective potassium channel blocker, it exerts potent and selective inhibition on the delayed rectifier (I(K)) K(+) current with the IC(50) value of 3.6 + - 10.1 mu M.