Intracellular vesicular trafficking in the gill epithelium of urea-excreting fish
Most teleost fish are ammoniotelic, and relatively few are ureotelic, in which the majority of nitrogenous waste is excreted as urea. This study aimed to determine whether the gill ultrastructure of ureotelic fish might have specific, unique characteristics compared with ammoniotelic fish. The present data suggest that the urea-transporter protein, recently found in toadfish gills, is inserted in the vesicle. Subsequently, it could serve to either sequester cytosolic urea that ultimately is secreted into the water after contact of these vesicles with the pavement cell apical membrane, or it could allow facilitated diffusion of urea across the plasma membrane following insertion into the membrane.
Bibliographic Reference: An article published in: Cell Tissue Res. (2001) vol.303,pp.197-210
Record Number: 200013552 / Last updated on: 2001-07-25
Original language: en
Available languages: en