Regulatory peptides in the urinary bladder of two genera of Antarctic teleosts |
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Authors: | M A Masini M Sturla P Prato P Romano B Uva |
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Institution: | (1) Dipartimento di Biologia Sperimentale, Ambientale ed Applicata, Università di Genova, viale Benedetto XV 5, I-16132 Genoa, Italy e-mail: uvab@unige.it, Tel.: +39-10-3538049, Fax: +39-10-3538047, IT;(2) Dipartimento di Medicina Sperimentale, Università di Genova, via De Toni 14, I-16132 Genoa, Italy, IT |
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Abstract: | Somatostatin 14, prolactin, atrial natriuretic peptide, galanin and urotensin II were found using immunohistochemistry in
the urinary bladders of the Antarctic fishes Trematomus bernacchii (Nototheniidae) and Chionodraco hamatus (Channichthyidae) caught in the Ross Sea. The urinary bladders of the two species showed a different histology in the epithelial
layer. In T. bernacchii the epithelium comprises a single type of columnar cells, while in C. hamatus the columnar cells are restricted to the ventral portion of the bladder, and the dorso-lateral region is lined by cuboidal
cells. No difference in the intensity of the immunostaining was observed in the two cell types; the only variation was a different
distribution of the immunoreactions, which were present in the whole cytoplasm in the cuboidal cells and restricted to the
apical and/or basal portion of the columnar cells.
Accepted: 1 November 1998 |
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