Functional analyses of ion-channels and receptors in adult and developing mammalian sensory neurons.

组胺和组胺H1受体存在于沙土鼠视网膜，H2和H3受体在发育中的沙土鼠神经节细胞上表达。在人视杆感受器中，多巴胺通过D2受体减少h电流(Ih)，并通过D2受体抑制电压反应的逐渐衰减，表明多巴胺通过抑制人视杆细胞的ih而减缓对光刺激的反应的恢复阶段。

Histamine and histamine H1 receptor exist in the gerbil retina, and that H2 and H3 receptors were expressed on developing gerbil ganglion cells.In human rod photoreceptors, dopamine reduced h current (Ih) through a D2 receptor, and inhibited the gradual decay in the voltage response via a D2 receptor, indicating that dopamine slows the recovery phase of responses to light stimuli by inhibiting Ih in human rods.