Rhesus glycoprotein and urea transporter genes are expressed in early stages of development of rainbow trout (Oncorhynchus mykiss)

2008 ◽  
Vol 309A (5) ◽  
pp. 262-268 ◽  
Author(s):  
Carrie C. Hung ◽  
C. Michele Nawata ◽  
Chris M. Wood ◽  
Patricia A. Wright
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Urea Transporter ◽  
Stages Of Development ◽  
Early Stages ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Rhesus Glycoprotein

scholarly journals Expression of Four Glutamine Synthetase Genes in the Early Stages of Development of Rainbow Trout (Oncorhynchus mykiss) in Relationship to Nitrogen Excretion

2005 ◽  
Vol 280 (21) ◽  
pp. 20268-20273 ◽  
Author(s):  
Phyllis A. Essex-Fraser ◽  
Shelby L. Steele ◽  
Nicholas J. Bernier ◽  
Brent W. Murray ◽  
E. Don Stevens ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Glutamine Synthetase ◽  
Oncorhynchus Mykiss ◽  
Nitrogen Excretion ◽  
Stages Of Development ◽  
Early Stages ◽  
Rainbow Trout Oncorhynchus Mykiss

The mechanisms of urea transport by early life stages of rainbow trout (Oncorhynchus mykiss)

2000 ◽  
Vol 203 (20) ◽  
pp. 3199-3207 ◽  
Author(s):  
C.M. Pilley ◽  
P.A. Wright
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Urea Transport ◽  
Early Life Stages ◽  
Urea Transporter ◽  
Urea Excretion ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Collecting Ducts ◽  
External Water ◽  
Very High

We tested the hypothesis that urea transport in rainbow trout (Oncorhynchus mykiss) embryos is dependent, in part, on a bidirectional urea-transport protein. Acute exposure to phloretin and urea analogs [acetamide, thiourea, 1,(4-nitrophenyl)-2-thiourea] reversibly inhibited urea excretion from the embryos to the external water. Unidirectional urea influx was inhibited by acetamide and thiourea, with IC(50) values of 0.04 and 0.05 mmol l(−1), respectively. Influx of urea from the external water to the embryo tended to saturate at elevated external urea concentrations (V(max)=10.50 nmol g(−1) h(−1); K(m)=2 mmol l(−1)). At very high urea concentrations (20 mmol l(−1)), however, a second, non-saturable component was apparent. These results indicate that urea excretion in trout embryos is dependent, in part, on a phloretin-sensitive facilitated urea transporter similar to that reported in mammalian inner medullary collecting ducts and elasmobranch kidney.

scholarly journals The use of rainbow trout oncorhynchus mykiss in early ontogenesis for the water toxicity assessment

2019 ◽  
pp. 527-538
Author(s):  
Nijole Kazlauskiene ◽  
Milda Zita Vosyliene ◽  
Egle Ratkelyte ◽  
Vilmante Karlaviciene ◽  
William Hogland
Keyword(s):  
Heavy Metals ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Toxicity Assessment ◽  
Relative Mass ◽  
Adult Fish ◽  
Stages Of Development ◽  
Water Toxicity ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
The Impact

Toxicity of some heavy metals (HM), heavy metal model mixture (HMMM), orimulsion, crudeoil and water of some biotopes of Lake Druksiai was evaluated by use of the fish in all stages ofdevelopment (embryos, larvae, adult fish). The rainbow trout was very sensitive test-organism tothe effect of different kind pollutants and the most sensitive to the impact of pollutants were fishat early stages of development i.e. larvae and embryos. The integrated biological parameters offish at all stages of development (survival, growth rate, and relative mass increase) were the mostsensitive ones. In accordance with the sensitivity to the impact of heavy metals, animals in theearliest stages of their development were more sensitive than plants, but the plants in some caseswere more sensitive to heavy metals than adult fish. Therefore, plants as well as animals -rainbow trout (Oncorhynchus mykiss) of different life stages, as test-organisms, arerecommended for the inclusion of the complex biotests for the assessment of the impact of heavymetals. The complex of the most sensitive parameters investigated of rainbow trout can besuccessfully used for the water toxicity assessment containing different kind pollutants. The dataobtained let predict the impact of pollution not only to the physiological status of aquaticorganisms but as well as to their survival in natural water bodies.

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