Summary
Vasoactive intestinal polypeptide, substance P, neuropeptide Y and peptide histidine isoleucine immunoreactivities have been demonstrated in the female genitalia of rat, cat, mouse and guinea-pig using immunocytochemistry and radioimmunoassay. They were localized to nerves. Each type of immunoreactive nerve showed a distinct pattern of distribution, though all were associated to some degree with blood vessels and smooth muscle. Vasoactive intestinal polypeptide-immunoreactive and neuropeptide Y-immunoreactive nerves were the most abundant. Higher concentrations of peptides were detected in the female genitalia of the mouse than those of the other species studied. Vasoactive intestinal polypeptide-immunoreactive nerves were particularly concentrated in the cervix (89.1±17.2 pmol/g, mean±S.E.M.) and the uterus (57.4±14.8 pmol/g) of the mouse, while neuropeptide Y immunoreactivity was more abundant in the Fallopian tube of the mouse (31.6±11.8 pmol/g) and the vagina of the rat (38.6±4.8 pmol/g) than in other regions. Separate populations of ganglion cells in the paracervical ganglia were found to contain vasoactive intestinal polypeptide and neuropeptide Y immunoreactivities. Peptide histidine isoleucine-immunoreactive and vasoactive intestinal polypeptide-immunoreactive nerves were similarly distributed, but the former were much less frequent. Substance P-immunoreactive nerves were seen mainly beneath the epithelium of the vagina and were, in general, more numerous in the guinea-pig than in other species. The significance of these peptide-immunoreactive nerves in the female genital organ remains to be determined.
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Dr. Wang is on leave from The Institute of Acupuncture, The Academy of Chinese Traditional Medicine, Peking, China.
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Huang, W.M., Gu, J., Blank, M.A. et al. Peptide-immunoreactive nerves in the mammalian female genital tract. Histochem J 16, 1297–1310 (1984). https://doi.org/10.1007/BF01003727
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DOI: https://doi.org/10.1007/BF01003727