孤束核中含生长抑素的神经细胞和神经纤维——免疫电镜研究

SOMATOSTATIN-CONTAINING NEURONS AND NERVE FIBERS IN ThE NUCLEUS TRACTUS SOLITARII——A IMMUNOELECTRON MICROSCOPIC STUDY

本文报道用免疫电镜方法研究大白鼠延髓孤束核联合亚核内含生长抑素(SRIF)的神经细胞及神经末梢。实验结果表明,孤束核内的SRIF样免疫反应阳性胞体为中小型细胞,呈梭形或椭圆形。含SRIF样免疫反应的轴突主要构成轴轴突触,后者为通道突触或终末突触。含SRIF的孤束核神经细胞本身不接受含SRIF的神经纤维支配,但其树突可与未标记的轴突形成轴树突触。

Somatostatin-containing neurons and nerve fibers in the commissural subnucleus of the nucleus tractus solitarii(NTS)of the rat were studied by means of munoelectron microscopy.The results showed that somatostatin-like immunoreactive positive neurons are medium or small cells,fusiform or elliptical.Somatostatin-like immunoreactive positive axons are unmyelinated,and mainly form passage or terminal synapses.Somatostatin-positive cell bodies themselves have not been obser-ved to form synapses with somatostatin-positive fibers,but their dendrites may receive innervation from immunoreactive-negative fibers by axo-dendritic synapses.