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Aldosterone

醛固酮

Mechanism of action:

Aldosterone 是一種由腎上腺皮質球狀帶(zona glomerulosa)分泌的礦物皮質激素(mineralocorticoid)。其主要作用機制是與腎小管上皮細胞內的礦物皮質激素受體(MR,mineralocorticoid receptor)結合,促進鈉離子(Na⁺)再吸收與鉀離子(K⁺)排出,同時增加水份再吸收,從而維持血液容量與血壓的穩定。Aldosterone 的分泌受腎素-血管張力素-醛固酮系統(RAAS)調控,當血壓下降或血鈉濃度降低,或血鉀濃度升高時,會促進其釋放。過量分泌可導致高血壓與低血鉀症,而不足則可能引起脫水與低血壓。

​Reference(s):

1. Kanai N et al. (1996). Transient expression of oatp organic anion transporter in mammalian cells: identification of candidate substrates. Am J Physiol. 


2. Bossuyt X et al. (1996). Polyspecific drug and steroid clearance by an organic anion transporter of mammalian liver. J Pharmacol Exp Ther.

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