Abstract
Neuropeptidergic innervation of the human prostate, seminal vesicle and vas deferens was investigated by immunohistochemical methods. The innervation pattern of all organs was very dense. Neuropeptide Y- and tyrosine hydroxylase-positive nerve fibers were most abundant and localized mainly in the smooth muscle layer. On the contrary, vasoactive intestinal polypeptide-positive nerve fibers were mainly found beneath the epithelium. Also leu-enkephaline-, peptide histidine isoleusine- and calcitonin gene-related peptide-positive nerve fibers could be observed in all organs, but somatostatin-positive nerves only in the prostate and seminal vesicle and met-enkephalin- and substance P-positive nerves only in the prostate.
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