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  • Title: Neuropeptide Y in the female reproductive tract of the rat. Distribution of nerve fibres and motor effects.
    Author: Stjernquist M, Emson P, Owman C, Sjöberg NO, Sundler F, Tatemoto K.
    Journal: Neurosci Lett; 1983 Sep 09; 39(3):279-84. PubMed ID: 6355912.
    Abstract:
    Fluorescence immunocytochemistry revealed the presence of extensive systems of nerve fibres containing neuropeptide Y (NPY) in the rat's ovary, fallopian tube, uterine horns and cervix. The most prominent supply of NPY fibres was found in ther cervix, where they are associated with both vascular and non-vascular smooth musculature. Smooth muscle effect of NPY was studied in an in vitro model using circular cervix preparations from estrogen-treated sprayed rats. NPY onhibited in a dose-dependent way neurally evoked (tetrodotoxin-sensitive) contractions, but had no effect on resting tension. The nerve-induced contractions were blocked by atropine, the experiments thus suggest prejunctional actions of NPY in cholinergic nerves in the uterine cervix.
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