Effects of temperature on oxidative phosphorylation of liver mitochondria from hamster, rat and squirrel monkey

Roberts, Joseph; Arine, Robert M.; Rochelle, R. H.; Chaffee, R. R. J.

doi:10.1016/0305-0491(72)90015-6

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…1972;Raison and McMurchie, 197 4;Wodtke, 1976) which showed significantly greater decreases in rate with decreasing temperature in endotherms compared to ectotherms. The 01 o values for mitochondrial V02 were significantly higher in the endotherms than in the ectotherms but comparable to previously published values for both groups (Roberts, et al, 1972;Pye, 1973). In practical terms, the temperature at which a \702 measurement is made can be of critical importance to an accurate measure of an organism's physiological state.…”

supporting

confidence: 69%

“…al. (1988) have shown that mitochondria have tissue specific properties in a hibernation adapted mammal and Roberts, et. al.…”

Section: Discussionmentioning

confidence: 99%

“…Wodtke (1976Wodtke ( , 1978Wodtke ( ,1981 and Ohira and Ohira (1988) have shown that acclimation temperature can influence both the lipid composition and transition temperature of ectotherm inner mitochondrial membranes. Other studies (Roberts, et al, 1972;Geiser et al, 1984;Raison, et. al., 1988) have shown similar changes in the composition of mitochondrial membranes of hibernating mammals, while cold acclimation had no effect on the mitochondrial membranes of non-hibernating mammals.…”

mentioning

confidence: 99%

“…This agrees with earlier comparisons of mitochondrial oxidation ( Lyons and Raison, 1970;Raison, et. al., 1971 a,b;Hazel, 1972a,b;Roberts, et. al.…”

mentioning

confidence: 99%

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The physiology and biochemistry of isolated skeletal muscle mitochondria : a comparative study

Wagner¹

2000

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The physiological limit to maximum aerobic capacity ('v02max) in vertebrates has been attributed to cardiovascular oxygen delivery, to the ability of the muscle cells to consume oxygen, or to a fine-tuned development of all components of the respiratory system such that no single component can be shown to limit \702max. The above hypotheses have each been developed using different experiments with different animals. The comparative studies uniting these animals and methods are limited. In order to further our knowledge of the cellular limit to \;t02max, skeletal muscle mitochondria were isolated from species representing four vertebrate classes, and endothermic and ectothermic physiology.Mitochondrial '702 was measured at 15, 25 and 35°C and the results were compared between species and endothermic and ectothermic groups. Mitochondrial enzyme activities were measured at the three treatment temperatures to ascertain which enzyme activity best represents ~02max for all vertebrates. Cytochrome difference spectra were measured to determine the concentrations of mitochondrial cytochromes c+c1 . The results show that mitochondria are unique in all species tested. Each species has its own response to changing temperature and its own mitochondrial enzyme activity profile. In addition, in vitro measurements of mitochondrial 'V02 for all species show rates significantly higher than those estimated from whole organism measurements of 2 ~02max, suggesting that mitochondrial oxygen uptake is not a factor limiting organismal V02max. The 01 o for mitochondrial "02 differed significantly between groups, indicating that differences in ~02max between endotherms and ectotherms cannot be explained solely on the basis of temperature. The activation energy ( Ea) of mitochondrial ~02 was significantly higher in endotherms compared to ectotherms. Mitochondrial enzyme activities did not show the same 01 o and Ea differences as the intact mitochondria. Since enzyme activities were measured on mitochondria disrupted with either detergent or sonication, physical properties of the mitochondrial inner membrane are suggested as being responsible for these differences.

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supporting

confidence: 69%

“…al. (1988) have shown that mitochondria have tissue specific properties in a hibernation adapted mammal and Roberts, et. al.…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

“…This agrees with earlier comparisons of mitochondrial oxidation ( Lyons and Raison, 1970;Raison, et. al., 1971 a,b;Hazel, 1972a,b;Roberts, et. al.…”

mentioning

confidence: 99%

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The physiology and biochemistry of isolated skeletal muscle mitochondria : a comparative study

Wagner¹

2000

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Arrhenius parameters of mitochondrial membrane respiratory enzymes in relation to thermoregulation in endotherms

Geiser

McMurchie

1985

J Comp Physiol B

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The relationship between the body temperature (Tb), the Arrhenius critical temperature (T*), and the apparent activation energy above T* (Ea1), of liver and heart mitochondrial respiratory enzymes from eleven homeothermic and eight heterothermic species was determined using a linear regression analysis. An inverse relation was observed between T* and Ea1 during torpor and hibernation. In all thermoregulatory states, T* decreased with Tb and T* was equal to or below Tb. During torpor Ea1 increased in a linear manner as Tb was lowered. It appears that the above Arrhenius parameters are closely linked to the thermoregulatory state of endotherms and thus may represent an adaptation for function at low Tb's.

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The effects of long chain fatty acids on the respiration of liver mitochondria of cold and warm acclimated rat, pigeon and trout

Ballantyne¹,

George²

1977

Journal of Thermal Biology

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Effects of temperature on oxidative phosphorylation of liver mitochondria from hamster, rat and squirrel monkey

Cited by 5 publications

References 15 publications

The physiology and biochemistry of isolated skeletal muscle mitochondria : a comparative study

The physiology and biochemistry of isolated skeletal muscle mitochondria : a comparative study

Arrhenius parameters of mitochondrial membrane respiratory enzymes in relation to thermoregulation in endotherms

The effects of long chain fatty acids on the respiration of liver mitochondria of cold and warm acclimated rat, pigeon and trout

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