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Glycogen pools and utilization during exercise: future implication on glucose regulation.
J Physiol
October 2024
Faculty of Health and Social Development, School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, British Columbia, Canada.
Dietary Variation Effect on Life History Traits and Energy Storage in Neotropical Species of Drosophila (Diptera; Drosophilidae).
Neotrop Entomol
June 2024
Evolutionary Biology Graduate Program, Biological Sciences Department, UNICENTRO, Guarapuava, PR, Brazil.
The ability of an organism to respond to nutritional stress can be a plastic character under the action of natural selection, affecting several characteristics, including life history and energy storage. The genus Drosophila (Diptera; Drosophilidae) presents high variability regarding natural resource exploration. However, most works on this theme have studied the model species D.
View Article and Find Full Text PDFLife History Traits and Metabolic Pool Variation in Neotropical Species of (Diptera, Drosophilidae).
Zool Stud
December 2023
UNICENTRO, CEDETEG, Universidade Estadual do Centro-Oeste, LaGEv, Laboratório de Genética e Evolução do Departamento de Ciências Biológicas, Élio Antonio Dalla Vecchia Alley, 838, Vila Carli, Guarapuava-PR 85040-167, Brazil. E-mail: (Mateus); (CH dos Santos); (KAV dos Santos); (de Barros Machado).
The differential exploration of natural resources by species has effects on fitness, with changes in life history and metabolic traits. There is a lack of research on the variation in these characters in different environments in Neotropical species of . The purpose of this study was to evaluate the profile of life history traits, including viability, development time, and dry weight (as a measure of size), as well as the metabolic pools of triglyceride, glycogen, and protein, in populations from the southern and southeastern regions of Brazil of four Neotropical species: , of the subgenus, and , , and , which belong to the subgenus.
View Article and Find Full Text PDFDifferential utilisation of subcellular skeletal muscle glycogen pools: a comparative analysis between 1 and 15 min of maximal exercise.
J Physiol
April 2024
Department of Sports Science and Clinical Biomechanics, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
Article Synopsis
- In skeletal muscle, glycogen is stored in different locations, and this affects how quickly it can be used during exercise.
- A study tested how varying exercise durations (1 min vs. 15 min) and carbohydrate intake impact glycogen use; it found that different glycogen pools are preferentially used based on the duration of the exercise.
- Lowering carbohydrate and energy intake after depleting glycogen reduces the availability and size of glycogen particles, particularly affecting the intramyofibrillar and subsarcolemmal pools.
To sustain growth in changing nutrient conditions, cells reorganize outputs of metabolic networks and appropriately reallocate resources. Signaling by reversible protein phosphorylation can control such metabolic adaptations. In contrast to kinases, the functions of phosphatases that enable metabolic adaptation as glucose depletes are poorly studied.
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