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Vasopressin

抗利尿激素
Mechanism of action:
Vasopressin 是一種內源性胜肽荷爾蒙,由下視丘合成、經腦下垂體後葉釋放。Vasopressin 對於腎集尿管主細胞的 V₂ 受體,能活化 Gs 蛋白偶聯訊號路徑,促使水通道蛋白 AQP2 插入細胞頂膜,增加水分再吸收,尿量下降、尿液濃縮;對於血管平滑肌的 V₁a 受體,能活化 Gq/11 蛋白偶聯訊號路徑,讓血管平滑肌收縮,血壓上升;而對於腦下垂體前葉的 V₁b 受體,能促進促腎上腺皮質素(adrenocorticotropic hormone)分泌。
Reference(s):
1. Bielsky IF et al. (2004). Profound impairment in social recognition and reduction in anxiety-like behavior in vasopressin V1a receptor knockout mice. Neuropsychopharmacology.
2. Wersinger SR et al. (2007). Vasopressin 1a receptor knockout mice have a subtle olfactory deficit but normal aggression. Genes Brain Behav.
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