Correlation between catecholamine release and degree of acidotic stress in trout.
Correlation between catecholamine release and degree of acidotic stress in trout.
复制标题
鳟鱼儿茶酚胺释放与酸中毒应激程度之间的相关性。
DOI：
10.1152/ajpregu.1988.255.3.r395
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
R. Boutilier
中科院分区：
文献类型：
--
作者：
Y. Tang;R. Boutilier
淡水虹鳟（FW）和海水虹鳟鱼（SW）的穷尽运动导致血浆儿茶酚胺的显著急性增加。运动后，FW鳟鱼体内的肾上腺素和去甲肾上腺素浓度分别是静息水平的69倍和15倍；在西南鳟鱼中，它们分别是静息值的46倍和11倍。在恢复后的第一个小时，FW动物的儿茶酚胺激增幅度约为SW动物的两倍。与此相关的是FW鳟鱼的细胞外pH紊乱，其严重程度约为SW鳟鱼的两倍。事实上，血浆儿茶酚胺反应的幅度和时间过程都与酸碱干扰相匹配。发现血液pH值的立即下降与血浆肾上腺素和去甲肾上腺素的相应增加之间存在线性相关。我们得出结论，儿茶酚胺释放到血浆中与酸碱干扰的程度成正比。与SW相比，FW鳟鱼运动后血浆儿茶酚胺水平较高似乎是FW动物对更大酸碱干扰的反应。
Exhaustive exercise in freshwater (FW) and seawater (SW) rainbow trout resulted in a marked and acute increase of plasma catecholamines. Immediately after exercise, epinephrine and norepinephrine concentrations in FW trout were 69 and 15 times the resting level, respectively; in SW trout, they were 46 and 11 times the resting value, respectively. Over the 1st h of recovery, the magnitude of the catecholamine surge in FW animals was about twice that of their SW counterparts. Correlated with this was an extracellular pH disturbance in FW trout, which was approximately twice as severe as in SW trout. Indeed, both the magnitudes and time courses of the plasma catecholamine responses were matched to those of the acid-base disturbances. Linear correlations were found to exist between the immediate depression of blood pH and the corresponding increases in plasma epinephrine and norepinephrine. We conclude that catecholamines are released into the plasma in proportion to the magnitude of the acid-base disturbance. The higher postexercise levels of plasma catecholamines in FW trout vs. SW appear to be a response to the greater acid-base disturbance in the FW animals.