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Defective Lipolysis and Altered Energy Metabolism in Mice Lacking Adipose Triglyceride Lipase
The results indicate that ATGL is rate limiting in the catabolism of cellular fat depots and plays an important role in energy homeostasis.
Natural hypometabolism during hibernation and daily torpor in mammals
Modulation of leptin sensitivity by short photoperiod acclimation in the Djungarian hamster, Phodopus sungorus
Treatment with mouse recombinant leptin during ad libitum refeeding inhibited the recovery of body mass and blunted the increase of food intake observed in controls, indicating that the sliding set-point utilizes leptin as a signal for the adjustment of the appropriate body mass level.
Photoperiod and Thermoregulation in Vertebrates: Body Temperature Rhythms and Thermogenic Acclimation
- G. Heldmaier, S. Steinlechner, T. Ruf, Herbert Wiesinger, M. Klingenspor
- Environmental ScienceJournal of biological rhythms
- 1 June 1989
This work shows that photoperiodic control not only affects energy balance indirectly via the control of repro duction or body mass, but may directly interact with central control of thermoregulation and may influence the process of acclimatization.
Seasonal control of energy requirements for thermoregulation in the djungarian hamster (Phodopus sungorus), living in natural photoperiod
All seasonal changes were similar inPhodopus living inside or outside, suggesting that seasonal changes in photoperiod and not seasonalChanges inTa is the overriding controller for the environmental cueing of seasonality in energy requirements for thermoregulation.
Hibernation in the tropics: lessons from a primate
- K. Dausmann, J. Glos, J. Ganzhorn, G. Heldmaier
- Environmental ScienceJournal of Comparative Physiology B
- 29 January 2005
It is demonstrated that maximum body temperature is a key factor necessitating the occurrence of arousals during hibernation and, therefore, low body temperature should no longer be included in the definition of hibernation.
3-Iodothyronamine: a novel hormone controlling the balance between glucose and lipid utilisation
- L. J. Braulke, M. Klingenspor, G. Heldmaier
- BiologyJournal of Comparative Physiology B
- 1 February 2008
T1AM has the potential to control the balance between glucose and lipid utilisation in vivo and is supported by the observation that the treatment of T1AM caused ketonuria and a significant loss of body fat.
Seasonal pattern and energetics of short daily torpor in the Djungarian hamster, Phodopus sungorus
It is concluded that torpor is not primarily aimed to reduce energy requirements but to guarantee survival of a fraction of a population during short periods of extreme cold load or inaccessability of food.
Nonshivering thermogenesis and cold resistance during seasonal acclimatization in the Djungarian hamster
- G. Heldmaier, S. Steinlechner, J. Rafael
- Environmental ScienceJournal of comparative physiology
- 1 March 1982
Djungarian hamsters improved their cold limit during seasonal acclimatization from −24°C in summer to −68°CTa in winter primarily due to an increase in their capacity for nonshivering thermogenesis, assisted by an improved utilization of heat in smaller winteracclimatized hamsters.
Adaptive thermogenesis and thermal conductance in wild-type and UCP1-KO mice.
- C. Meyer, M. Willershäuser, M. Klingenspor
- BiologyAmerican journal of physiology. Regulatory…
- 1 November 2010
It is concluded that BAT is required for maximal adaptive thermogenesis but also allows metabolic flexibility and a rapid switch toward sustained lipid-fuelled thermogenesis as an acute response to cold.