Effect of Urotensin I on the ionic content of the plasma and the Gallbladder bile of Hoplias malabaricus (Bloch, 1974) (Teleostei, Characiformes, Erythrinidae)

Authors

  • Bernardo Baldisserotto Departamento de Fisiologia, Centro de Ciências da Saúde - CCS, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS.
  • Roni João Rakoski Departamento de Fisiologia, Centro de Ciências da Saúde - CCS, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS.
  • Olga Martins Mimura Departamento de Fisilogia, Instituto de Biociências, USP, São Paulo, SP.

DOI:

https://doi.org/10.5902/2179460X26605

Abstract

In this study the urotensin I (UI) effect on the ionic content of the plasma and the gallbladder bile (GB) of Hoplias malabaricus, a freshwater teleost, was investigated, and action of this hormone on the water trasnport in the gallbladder was analyzed. Fishes were captured in ponds situated on the campus of the Federal University of Santa Maria (UFSM), Santa Maria, Southern Brazil. Blood was collected by puncture of caudal artery and GB was drained by the cystic duct. The intraperitoneal injection of UI (500 ng/kg) in H. malabaricus increased the Na+ levels in the plasma and in the GB in relation to the saline-injected group. However, no change was observed in the levels of K+, Ca++ and Mg++ in the plasma and in the GB when UI was injected. The gallbladder of H. malabaricus has a mucosa-serosa water flow. On incubation of the serosa of the gallbladder sacs with UI (10-8M) there was a significant increase in water flow. Due to the fact that UI alters the GB Na+ levels and the water flow in the gallbladder, it is possible that UI can be involved in the regulation of the bile composition on fishes.

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References

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Published

1996-12-09

How to Cite

Baldisserotto, B., Rakoski, R. J., & Mimura, O. M. (1996). Effect of Urotensin I on the ionic content of the plasma and the Gallbladder bile of Hoplias malabaricus (Bloch, 1974) (Teleostei, Characiformes, Erythrinidae). Ciência E Natura, 18(18), 61–70. https://doi.org/10.5902/2179460X26605

Issue

CIÊNCIA E NATURA, V. 18, N. 18, 1996

Section

Articles

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