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  • Title: Localization of atrial natriuretic factor (ANF)-immunoreactive material in the hypothalamo-pituitary complex of the frog.
    Author: Netchitailo P, Feuilloley M, Pelletier G, Cantin M, Leboulenger F, Andersen A, Vaudry H.
    Journal: Neurosci Lett; 1986 Dec 12; 72(2):141-6. PubMed ID: 2949168.
    Abstract:
    The presence of atrial natriuretic factor (ANF)-like material in the hypothalamo-pituitary complex of the frog (Rana ridibunda) was studied by means of indirect immunofluorescence and immunogold techniques. In the hypothalamus, numerous ANF-positive cell bodies were located in the preoptic nucleus, the lateral forebrain bundle and the dorsal infundibular nucleus. The ventral infundibular area and the median eminence contained only ANF-immunoreactive fibers. A dense network of fibers and nerve terminals was observed in the neural lobe of the pituitary. Scarce nerve endings were also noted in the intermediate lobe whereas ANF-like immunoreactivity was totally absent in the anterior lobe of the pituitary. At the ultrastructural level, positive material appeared restricted to dense core vesicles (about 100 nm in diameter). These results demonstrate that an ANF-like substance is contained in nerve terminals of the frog pars nervosa, and support the hypothesis that ANF may exert a physiological role in the control of release of neurohypophyseal peptides.
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