离子通道在阴茎海绵体平滑肌紧张性调节中的作用

阴茎海绵体平滑肌舒张或收缩的调节 ,即海绵体平滑肌紧张性的生理学分别决定阴茎的勃起或疲软状态。众多的证据提示与其他血管组织一样 ,钾通道、钙通道是阴茎海绵体平滑肌紧张性的主要调节物质。在培养的海绵体平滑肌细胞和游离海绵体组织平滑肌条研究显示 :参与阴茎勃起的神经递质大多通过对平滑肌细胞离子通道及离子跨膜流动的作用而调节海绵体平滑肌紧张性。

Role of Ionic Channels in the Regulation of Cavernous Smooth Muscle Tone

The regulation of vascular and trabecular smooth muscle relaxation or contraction in the penis, that is, the physiology of corporal smooth muscle tone, determines penile erection or flaccidity. There is considerable evidence that the potassium channel and calcium channel, like many other vascular tissues, are the major modilators of smooth muscle tone in the corpora. Moreover, data on cultured corporal smooth muscle cells and isolated corporal tissue strips have demonstrated that the neurotransmitters participating in erection modulate corporal smooth muscle tone largely through their effects on ionic channels and transmembrane ionic flux.