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Cellular oxygen consumption in patients with diabetic ketoacidosis.
Intensive Care Med Exp
November 2024
Center for Resuscitation Science, Beth Israel Deaconess Medical Center, 330 Brookline Ave, Boston, MA, 02215, USA.
Background: Diabetic ketoacidosis (DKA) is a potentially life-threatening disorder associated with severe alterations in metabolism and acid-base status. Mitochondrial dysfunction is associated with diabetes and its complications. Thiamine and coenzyme Q10 (CoQ10) are important factors in aerobic metabolism.
View Article and Find Full Text PDFThe seasonal response of metabolic rate to projected climate change scenarios in aquatic amphipods.
J Therm Biol
August 2024
Laboratory of Ecology, Department of Biological and Environmental Sciences and Technologies, University of the Salento, 73100, Lecce, Italy; NBFC, National Biodiversity Future Center, 90133, Palermo, Italy; CNR, National Research Council of Italy, Monterotondo Scalo, 00015, Rome, Italy.
The responses of organisms to climate change are mediated primarily by its impact on their metabolic rates, which, in turn, drive various biological and ecological processes. Although there have been numerous seminal studies on the sensitivity of metabolic rate to temperature, little is empirically known about how this rate responds to seasonal temperature ranges and beyond under conservative IPCC climate change scenarios. Here, we measured the SMR of the aquatic amphipod, Gammarus insensibilis, which served as our subject species, with body masses ranging from 0.
View Article and Find Full Text PDFFunctional role of metabolic suppression in avian thermoregulation in the heat.
J Therm Biol
July 2024
South African Research Chair in Conservation Physiology, South African National Biodiversity Institute, Pretoria, 0001, South Africa; DSI-NRF Centre of Excellence at the FitzPatrick Institute, Department of Zoology and Entomology, University of Pretoria, Hatfield, 0028, South Africa. Electronic address:
Hypometabolism arising from active metabolic suppression occurs in several contexts among endotherms, particularly during heterothermic states such as torpor. However, observed Q ≈ 1 for avian resting metabolic rate within the thermoneutral zone, values far below the Q = 2-3 expected on the basis of Arrhenius effects, suggests hypometabolism also plays a role in birds' thermoregulation at environmental temperatures approaching or exceeding normothermic body temperature (T). We evaluated the occurrence of hypometabolism during heat exposure among birds by re-analysing literature data to quantify changes in T and resting metabolic rate (RMR) near the upper boundary of the thermoneutral zone, at air temperatures (T) between the inflection above which T increases above normothermic levels (T) and the upper critical limit of thermoneutrality (T).
View Article and Find Full Text PDFPhysiological thermal responses of three Mexican snakes with distinct lifestyles.
PeerJ
July 2024
Laboratorio de Ecología Evolutiva y Conservación de Anfibios y Reptiles, Facultad de Estudios Superiores Iztacala, UNAM, Tlalnepantla, Estado de México, Mexico.
The impact of temperature on reptile physiology has been examined through two main parameters: locomotor performance and metabolic rates. Among reptiles, different species may respond to environmental temperatures in distinct ways, depending on their thermal sensitivity. Such variation can be linked to the ecological lifestyle of the species and needs to be taken into consideration when assessing the thermal influence on physiology.
View Article and Find Full Text PDFResting Metabolic Rate Does Not Predict Peak Metabolic Rate in the Glanville Fritillary Butterfly.
Integr Comp Biol
September 2024
Department of Biosciences, Metapopulation Research Centre, P.O. Box 65 (Viikinkaari 1), 00014, University of Helsinki, Finland.
Peak metabolic rate reflects maximal performance and may have direct fitness consequences, whereas resting metabolic rate (RMR) represents the maintenance cost of the whole animal. These traits may be linked, which has significant implications for the evolution of both traits. In vertebrates, a positive correlation between RMR and aerobic capacity has been proposed to explain the origin of endothermy.
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