Estrogen target cells in the pituitary of platyfish, Xiphophorus maculatus
- 1 May 1979
- journal article
- research article
- Published by Springer Nature in Cell and tissue research
- Vol. 198 (3), 435-440
- https://doi.org/10.1007/bf00234188
Abstract
Summary The distribution of estradiol-concentrating cells in the pituitary of the platyfish, Xiphophorus maculatus, is studied after the injection of 3H estradiol-17β by thaw-mount autoradiography. Autoradiograms prepared 2–8 h after the injection show nuclear concentration of radioactivity in certain cells of the proximal pars distalis, while no nuclear labeling is found in cells of the rostral pars distalis, pars intermedia and pars nervosa. Radioactively labeled cells are identified as gonadotropes by a combined technique of thaw-mount autoradiography and immunoperoxidase staining with antiserum to ovine LH. Approximately 80% of the immunoreactive LH cells show a concentration of radioactivity in their nuclei. These observations indicate that in teleosts, as in mammals, estradiol has a direct effect on pituitary gonadotropes.Keywords
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