Intracellular carbonic anhydrase contributes to the red blood cell adrenergic response in rainbow trout Oncorhynchus mykiss

2012 ◽  
Vol 184 (1) ◽  
pp. 60-64 ◽  
Author(s):  
D.W. Carrie ◽  
K.M. Gilmour
Keyword(s):  
Rainbow Trout ◽  
Carbonic Anhydrase ◽  
Blood Cell ◽  
Oncorhynchus Mykiss ◽  
Red Blood Cell ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Adrenergic Response

scholarly journals Evaluation of Soybean Meal-Red Blood Cell Coextruded Feed Ingredient in Diets Fed to Rainbow Trout Oncorhynchus mykiss

2001 ◽  
Vol 32 (4) ◽  
pp. 409-415 ◽  
Author(s):  
George L. Selden ◽  
Paul B. Brown ◽  
Anthony C. Ostrowski ◽  
Rolando A. Flores ◽  
Lawrence A. Johnson
Keyword(s):  
Rainbow Trout ◽  
Blood Cell ◽  
Oncorhynchus Mykiss ◽  
Red Blood Cell ◽  
Soybean Meal ◽  
Feed Ingredient ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals Acute and chronic influence of temperature on red blood cell anion exchange

2001 ◽  
Vol 204 (1) ◽  
pp. 39-45 ◽  
Author(s):  
F.B. Jensen ◽  
T. Wang ◽  
J. Brahm
Keyword(s):  
Rainbow Trout ◽  
Blood Cell ◽  
Anion Exchange ◽  
Temperature Sensitivity ◽  
Red Blood Cell ◽  
Temperature Acclimation ◽  
Freshwater Turtle ◽  
Acclimation Temperature ◽  
Published Data ◽  
Rainbow Trout Oncorhynchus Mykiss

Unidirectional (36)Cl(−) efflux via the red blood cell anion exchanger was measured under Cl(−) self-exchange conditions (i.e. no net flow of anions) in rainbow trout Oncorhynchus mykiss and red-eared freshwater turtle Trachemys scripta to examine the effects of acute temperature changes and acclimation temperature on this process. We also evaluated the possible adaptation of anion exchange to different temperature regimes by including our previously published data on other animals. An acute temperature increase caused a significant increase in the rate constant (k) for unidirectional Cl(−) efflux in rainbow trout and freshwater turtle. After 3 weeks of temperature acclimation, 5 degrees C-acclimated rainbow trout showed only marginally higher Cl(−) transport rates than 15 degrees C-acclimated trout when compared at the same temperature. Apparent activation energies for red blood cell Cl(−) exchange in trout and turtle were lower than values reported in endothermic animals. The Q(10) for red blood cell anion exchange was 2.0 in trout and 2.3 in turtle, values close to those for CO(2) excretion, suggesting that, in ectothermic animals, the temperature sensitivity of band-3-mediated anion exchange matches the temperature sensitivity of CO(2) transport (where red blood cell Cl(−)/HCO(3)(−) exchange is a rate-limiting step). In endotherms, such as man and chicken, Q(10) values for red blood cell anion exchange are considerably higher but are no obstacle to CO(2) transport, because body temperature is normally kept constant at values at which anion exchange rates are high. When compared at constant temperature, red blood cell Cl(−) permeability shows large differences among species (trout, carp, eel, cod, turtle, alligator, chicken and man). Cl(−) permeabilities are, however, remarkable similar when compared at preferred body temperatures, suggesting an appropriate evolutionary adaptation of red blood cell anion exchange function to the different thermal niches occupied by animals.

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