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Structural changes of the eel's kidney induced by prolactin

Zeitschrift für Zellforschung und Mikroskopische Anatomie, ISSN: 0302-766X, Vol: 88, Issue: 4, Page: 576-590
1968
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  • Citations
    27
    • Citation Indexes
      27

Article Description

The histological structure of the kidney of the Atlantic eel is described. It appears typical of that of a freshwater teleost: the nephron includes a glomerulus, a ciliated neck segment, a proximal segment with a brush border which can be subdivided into 2 distinct portions, a distal segment, an initial collecting segment and a general collector. Injections of ovin-prolactin (24 U.I. per day) in the body cavity induce important modifications of the kidney structure. The most visible changes affect the initial collecting segment: its diameter increases, cells exhibit a clear cytoplasma, hypertrophied nuclei and nucleoli, with a chromatic nuclear membrane. In the various segments, the measurements of the cell height, of the width of the tubule and its lumen, and of the nuclear diameter show an increase which is statistically significant. A mitotic activity occurs in all segments of the tubule. These changes which appear maximal after 10 injections, suggest a stimulation by a prolactin treatment. In addition, numerous "buds" (or compact cell masses) appear close to the initial collecting segment; their differentiation leads to the formation of new kidney tubules which become rapidly active. These histological data are discussed in correlation with the modifications of water and electrolyte metabolism in various teleosts, produced by prolactin administration. © 1968 Springer-Verlag.

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