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  • Title: Peptide-immunoreactive nerves in the mammalian female genital tract.
    Author: Huang WM, Gu J, Blank MA, Allen JM, Bloom SR, Polak JM.
    Journal: Histochem J; 1984 Dec; 16(12):1297-310. PubMed ID: 6085074.
    Abstract:
    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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