Regulatory peptides in the urinary bladder of two genera of Antarctic Teleosts

• Published in: Polar Biology
• Main Authors: MASINI, MARIA ANGELA, M. STURLA, P. PRATO, P. ROMANO, B. UVA
• Other Authors: Masini, MARIA ANGELA, M., Sturla, P., Prato, P., Romano, B., Uva
• Format: Article in Journal/Newspaper
• Language: English
• Published: 1999
• Subjects: Antarctic; The Antarctic; Ross Sea; Antarc*
• Online Access: http://hdl.handle.net/11579/90651; https://doi.org/10.1007/s003000050377

Somatostatin 14, prolactin, atrial natriuretic peptide, galanin and urotensin II were found using immunohistochemistry in the urinary bladders of the Antarctic ®shes Trematomus bernacchii (Nototheniidae) and Chionodraco hamatus (Channichthyidae) caught in the Ross Sea. The urinary bladders of the two species showed a dierent 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 dierence in the intensity of the immunostaining was observed in the two cell types; the only variation was a dierent 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.