Chick heart peptidergic innervation: localization and development.

Basic and applied histochemistry Pub Date : 1988-01-01
G Corvetti, L Andreotti, L Sisto Daneo
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引用次数: 0

Abstract

Localization and development of chick heart peptidergic innervation (Substance P, VIP and Somatostatin) were investigated by means of immunofluorescence technique. The peptidergic component of the heart innervation was observed, for the first time, in older than 11 day chick embryos, i.e., subsequently to the appearance of the cholinergic component. The peptidergic structures achieve nearly full development in about 16-17 day embryos. Substance P is the most represented of the three peptides. It is localized both in nerve bundle fibers and in isolated fibers within the myocardium, the pericardium, the vessel walls; it is also present in fibers of some heart base ganglia. VIP is mostly contained in some thick single fibers travelling along the vessel walls of the heart base, the myocardium and the pericardium. Some VIP immunoreactive cells were also observed in the base ganglia. Somatostatin is mostly contained in some ganglia cells, whilst thin Somatostatin-immunoreactive fibers form a rich plexus among the atrial and ventricular myofibers, without contacting the vessel walls.

鸡心脏肽能神经的定位与发育。
用免疫荧光技术研究了鸡心脏肽能神经支配(P物质、VIP和生长抑素)的定位和发育。心脏神经支配的肽能成分首次在大于11天的鸡胚胎中被观察到,即随后出现胆碱能成分。肽能结构在大约16-17天的胚胎中几乎完全发育。P物质是三种多肽中最具代表性的。它既存在于神经束纤维中也存在于心肌、心包和血管壁内的孤立纤维中;它也存在于一些心脏基底神经节的纤维中。VIP主要存在于沿心脏基底血管壁、心肌和心包膜的一些粗单纤维中。基底神经节内可见VIP免疫反应细胞。生长抑素主要存在于某些神经节细胞中,而薄的生长抑素免疫反应纤维在心房和心室肌纤维之间形成丰富的神经丛,而不与血管壁接触。
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