Histochemical localization of the cholinergic and nitrergic neurons in the chicken ileum
Yang, P. (Nanjing Agricultural Univ., Nanjing (China). Coll. of Veterinary Medicine) | Gandahi, J.A. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Anatomy and Histology) | Bian, X. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Veterinary Pharmacology) | Wu, L. | Bughio, S. | Zhang, L. | Chen, Q.
Histochemical localization and analysis of the cholinergic and nitrergic neurons in the chicken ileum were investigated by staining with acetylcholine esterase (AChE) and nicotinamide adenine dinucleotide phosphate diaphorase (NADPH-d), respectively. AChE and NADPH-d activity was demonstrated in neuronal cell bodies and nerve fibers in the chicken ileum. The positive neurons showed irregular or polygonal shape and were mainly present sporadic or clumped in the myenteric and submucosal plexus. The positive nerve fibers frequently surrounded the ileac blood vessels. They were abundantly present in myenteric and submucosal plexus of the ileum forming a network. Some positive nerve fibers traversed the submucosa into the lamina propria mucosae. Fine nerve fibers were found to penetrate into intestinal villi underneath the epithelium. Extensive networks of more intensely staining AChE positive nerve fibers were present in the mucosa as compared to that of NADPH-d positive fibers. Ganglia density of submucosal plexus was markedly bigger than that of myenteric plexus, whereas neurons per ganglion and the number of neurons per mm2 and the size of neurons of submucosal plexus were shorter than that of myenteric plexus. In addition, the number of AChE positive neurons and nerve fibers was more than that of NADPH-d positive neurons and nerve fibers. We concluded that the chicken ileum is characterized by abundance of nerve structures which may play a significant functional role in ileum of the chicken.
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