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Somatostatin in the brain and the pituitary of some teleosts

Immunocytochemical identification and the effect of starvation

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Summary

Immunocytochemical investigations show that somatostatin (SRIF)-like immunoreactive material is present in the brain and the pituitary of nine different species of teleosts. In the brain, immunoreactive perikarya and fibers are observed in the preoptic periventricular nucleus, the entopeduncular nucleus, the anterior periventricular nucleus, and the nucleus lateralis tuberis. In the pituitary, SRIF-like-immunoreactive fibers occur in the proximal pars distalis (PPD), which contains the growth hormone (GH)-secreting cells. Nerve fibers are scattered among GH cells (cyprinids), or end on the basal lamina at the neuroglandular interface of the PPD (eel, salmonids). In the eel, the proximal neurohypophysis does not penetrate deeply into the PPD that is very poorly vascularized. In some species, e.g. Myoxocephalus, SRIF-like immunoreactive fibers are also observed in the caudal neurohypophysis, and even among MSH cells of the pars intermedia.

In long-term starved carps and eels, the amount of SRIF-like material in the pituitary is clearly reduced. A possible role of SRIF in the concomitant stimulation of GH cells is discussed.

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Authors and Affiliations

  1. Laboratoire de Physiologie, Institut Océanographique, Paris, France

    M. Olivereau & J. Olivereau

  2. Zoological Institute, Leuven, Belgium

    F. Ollevier & F. Vandesande

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  1. M. Olivereau
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  2. F. Ollevier
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  3. F. Vandesande
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  4. J. Olivereau
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Olivereau, M., Ollevier, F., Vandesande, F. et al. Somatostatin in the brain and the pituitary of some teleosts. Cell Tissue Res. 238, 289–296 (1984). https://doi.org/10.1007/BF00217300

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  • DOI: https://doi.org/10.1007/BF00217300

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