Mitochondrial respiration in rats during hypothermia resulting from central drug administration

被引:2
|
作者
Sgarbi, Gianluca [1 ]
Hitrec, Timna [2 ]
Amici, Roberto [2 ]
Baracca, Alessandra [1 ]
Di Cristoforo, Alessia [2 ]
Liuzzi, Francesca [1 ]
Luppi, Marco [2 ]
Solaini, Giancarlo [1 ]
Squarcio, Fabio [2 ]
Zamboni, Giovanni [2 ]
Cerri, Matteo [2 ]
机构
[1] Univ Bologna, Dept Biomed & Neuromotor Sci DIBINEM, Lab Biochem & Mitochondrial Pathophysiol, Piazza Porta S Donato 2, I-40126 Bologna, Italy
[2] Univ Bologna, Dept Biomed & Neuromotor Sci DIBINEM, Lab Auton & Behav Physiol, Via Irnerio 48, I-40126 Bologna, Italy
关键词
Torpor; Hypothermia; Mitochondria; Raphe pallidus; Adenosine; DAILY TORPOR; METABOLIC SUPPRESSION; ADENOSINE RECEPTOR; CENTRAL ACTIVATION; SEASONAL-CHANGES; ATPASE ACTIVITY; HIBERNATION; DEPRESSION; LIVER; NEURONS;
D O I
10.1007/s00360-021-01421-6
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
The ability to induce a hypothermia resembling that of natural torpor would be greatly beneficial in medical and non-medical fields. At present, two procedures based on central nervous pharmacological manipulation have been shown to be effective in bringing core body temperature well below 30 degrees C in the rat, a non-hibernator: the first, based on the inhibition of a key relay in the central thermoregulatory pathway, the other, based on the activation of central adenosine A1 receptors. Although the role of mitochondria in the activation and maintenance of torpor has been extensively studied, no data are available for centrally induced hypothermia in non-hibernators. Thus, in the present work the respiration rate of mitochondria in the liver and in the kidney of rats following the aforementioned hypothermia-inducing treatments was studied. Moreover, to have an internal control, the same parameters were assessed in a well-consolidated model, i.e., mice during fasting-induced torpor. Our results show that state 3 respiration rate, which significantly decreased in the liver of mice, was unchanged in rats. An increase of state 4 respiration rate was observed in both species, although it was not statistically significant in rats under central adenosine stimulation. Also, a significant decrease of the respiratory control ratio was detected in both species. Finally, no effects were detected in kidney mitochondria in both species. Overall, in these hypothermic conditions liver mitochondria of rats remained active and apparently ready to be re-activated to produce energy and warm up the cells. These findings can be interpreted as encouraging in view of the finalization of a translational approach to humans.
引用
收藏
页码:349 / 360
页数:12
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