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Ethacrynic acid

利尿酸
Mechanism of action:
Ethacrynic acid 是一種袢利尿劑(loop diuretic)。Ethacrynic acid 的利尿作用發生在腎臟亨利氏環的上升段粗枝(thick ascending limb of the loop of Henle),抑制鈉鉀氯共轉運蛋白2(Na⁺/K⁺/2Cl⁻ transporter 2,NKCC2)。正常情況下,NKCC2 負責將鈉、鉀與氯離子從腎小管腔再吸收回細胞。Ethacrynic acid 抑制此轉運蛋白活性後,使 NaCl 再吸收大幅下降,導致大量水分隨鈉排出。
Reference(s):
1. Bowes TJ et al. (2005). Induction of mitochondrial fusion by cysteine-alkylators ethacrynic acid and N-ethylmaleimide. J Cell Physiol.
2. Chen X et al. (2002). TTD: Therapeutic Target Database. Nucleic Acids Res.
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