scholarly journals Eight weeks of overfeeding alters substrate partitioning without affecting metabolic flexibility in men

2017 ◽  
Vol 41 (6) ◽  
pp. 887-893 ◽  
Author(s):  
C M Peterson ◽  
B Zhang ◽  
D L Johannsen ◽  
E Ravussin
Keyword(s):  
Metabolic Flexibility ◽  
Substrate Partitioning

Metabolic flexibility, insulin sensitivity and genetic variations in newly diagnosed patients with type 2 diabetes

2015 ◽  
Vol 10 (S 01) ◽  
Author(s):  
M Apostolopoulou ◽  
K Strassburger ◽  
B Knebel ◽  
J Kotzka ◽  
J Szendroedi ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Insulin Sensitivity ◽  
Genetic Variations ◽  
Metabolic Flexibility ◽  
Newly Diagnosed

Impact of Type 1 Diabetes on 24-Hour Energy Expenditure and Metabolic Flexibility

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1887-P ◽  
Author(s):  
ELVIS A. CARNERO ◽  
KAREN D. CORBIN ◽  
CHRISTOPHER P. BOCK ◽  
STEVEN R. SMITH ◽  
RICHARD E. PRATLEY
Keyword(s):  
Type 1 Diabetes ◽  
Energy Expenditure ◽  
Metabolic Flexibility

Improved Metabolic Flexibility Postbreakfast after Exercise Intervention in People with T2DM

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 753-P
Author(s):  
ELVIS A. CARNERO ◽  
CHRISTOPHER P. BOCK ◽  
NATALIE STEPHENS ◽  
RICHARD E. PRATLEY ◽  
STEVEN R. SMITH ◽  
...  
Keyword(s):  
Exercise Intervention ◽  
Metabolic Flexibility

scholarly journals Muscle unloading-induced metabolic remodeling is associated with acute alterations in PPARδ and UCP-3 expression

2008 ◽  
Vol 34 (2) ◽  
pp. 149-161 ◽  
Author(s):  
Dawn J. Mazzatti ◽  
Melissa A. Smith ◽  
Radu C. Oita ◽  
Fei-Ling Lim ◽  
Andrew J. White ◽  
...  
Keyword(s):  
Differential Expression ◽  
Fiber Type ◽  
Uncoupling Protein ◽  
Hindlimb Suspension ◽  
Metabolic Flexibility ◽  
Peroxisome Proliferator ◽  
Compensatory Response ◽  
Mouse Muscle ◽  
Metabolic Remodeling ◽  
Muscle Unloading

A number of physiological changes follow prolonged skeletal muscle unloading as occurs in spaceflight, bed rest, and hindlimb suspension (HLS) and also in aging. These include muscle atrophy, fiber type switching, and loss of the ability to switch between lipid and glucose usage, or metabolic inflexibility. The signaling and genomic events that precede these physiological manifestations have not been investigated in detail, particularly in regard to loss of metabolic flexibility. Here we used gene arrays to determine the effects of 24-h HLS on metabolic remodeling in mouse muscle. Acute unloading resulted in differential expression of a number of transcripts in soleus and gastrocnemius muscle, including many involved in lipid and glucose metabolism. These include the peroxisome proliferator-activated receptors (PPARs). In contrast to Ppar-α and Ppar-γ, which were downregulated by acute HLS, Ppar-δ was upregulated concomitant with increased expression of its downstream target, uncoupling protein-3 ( Ucp-3). However, differential expression of Ppar-δ was both acute and transient in nature, suggesting that regulation of PPARδ may represent an adaptive, compensatory response aimed at regulating fuel utilization and maintaining metabolic flexibility.

scholarly journals Effects of Feeding Time on Markers of Muscle Metabolic Flexibility Following Acute Aerobic Exercise in Trained Mice Undergoing Time Restricted Feeding

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1717
Author(s):  
Aaron Persinger ◽  
Matthew Butawan ◽  
Martina Faietti ◽  
Ashley Pryke ◽  
Kyley Rose ◽  
...  
Keyword(s):  
Exercise Training ◽  
Performance Outcomes ◽  
Metabolic Flexibility ◽  
Feeding Time ◽  
Restricted Feeding ◽  
Physically Active ◽  
Impact Performance ◽  
Before And After ◽  
And Performance ◽  
Access To Food

Time-restricted feeding (TRF) is becoming a popular way of eating in physically active populations, despite a lack of research on metabolic and performance outcomes as they relate to the timing of food consumption in relation to the time of exercise. The purpose of this study was to determine if the timing of feeding/fasting after exercise training differently affects muscle metabolic flexibility and response to an acute bout of exercise. Male C57BL/6 mice were randomized to one of three groups for 8 weeks. The control had ad libitum access to food before and after exercise training. TRF-immediate had immediate access to food for 6 h following exercise training and the TRF-delayed group had access to food 5-h post exercise for 6 h. The timing of fasting did not impact performance in a run to fatigue despite TRF groups having lower hindlimb muscle mass. TRF-delayed had lower levels of muscle HSL mRNA expression and lower levels of PGC-1α expression but displayed no changes in electron transport chain enzymes. These results suggest that in young populations consuming a healthy diet and exercising, the timing of fasting may not substantially impact metabolic flexibility and running performance.

scholarly journals Metabolic Benefit of Chronic Caloric Restriction and Activation of Hypothalamic AGRP/NPY Neurons in Male Mice Is Independent of Ghrelin

Endocrinology ◽  
2016 ◽  
Vol 157 (4) ◽  
pp. 1430-1442 ◽  
Author(s):  
Nicole H. Rogers ◽  
Heidi Walsh ◽  
Oscar Alvarez-Garcia ◽  
Seongjoon Park ◽  
Bruce Gaylinn ◽  
...  
Keyword(s):  
Food Intake ◽  
Caloric Restriction ◽  
Liver Steatosis ◽  
Severe Hypoglycemia ◽  
Metabolic Flexibility ◽  
Male Mice ◽  
Ambulatory Activity ◽  
Ghrelin Receptor ◽  
Liver Gene ◽  
Acyl Ghrelin

Abstract Aging is associated with attenuated ghrelin signaling. During aging, chronic caloric restriction (CR) produces health benefits accompanied by enhanced ghrelin production. Ghrelin receptor (GH secretagogue receptor 1a) agonists administered to aging rodents and humans restore the young adult phenotype; therefore, we tested the hypothesis that the metabolic benefits of CR are mediated by endogenous ghrelin. Three month-old male mice lacking ghrelin (Ghrelin−/−) or ghrelin receptor (Ghsr−/−), and their wild-type (WT) littermates were randomly assigned to 2 groups: ad libitum (AL) fed and CR, where 40% food restriction was introduced gradually to allow Ghrelin−/− and Ghsr−/− mice to metabolically adapt and avoid severe hypoglycemia. Twelve months later, plasma ghrelin, metabolic parameters, ambulatory activity, hypothalamic and liver gene expression, as well as body composition were measured. CR increased plasma ghrelin and des-acyl ghrelin concentrations in WT and Ghsr−/− mice. CR of WT, Ghsr−/−, and Ghrelin−/− mice markedly improved metabolic flexibility, enhanced ambulatory activity, and reduced adiposity. Inactivation of Ghrelin or Ghsr had no effect on AL food intake or food anticipatory behavior. In contrast to the widely held belief that endogenous ghrelin regulates food intake, CR increased expression of hypothalamic Agrp and Npy, with reduced expression of Pomc across genotypes. In the AL context, ablation of ghrelin signaling markedly inhibited liver steatosis, which correlated with reduced Pparγ expression and enhanced Irs2 expression. Although CR and administration of GH secretagogue receptor 1a agonists both benefit the aging phenotype, we conclude the benefits of chronic CR are a consequence of enhanced metabolic flexibility independent of endogenous ghrelin or des-acyl ghrelin signaling.

Sign in / Sign up

Export Citation Format

Share Document