scholarly journals Evidence for a long time course adaptation of glucose metabolism to high protein feeding in rats without changes in resting energy expenditure

2008 ◽  
Vol 22 (S1) ◽  
Author(s):  
Magdalena Stepien ◽  
Dalila Azzout‐Marniche ◽  
Patrick Even ◽  
Audrey Payet ◽  
Angélique Simonin ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Energy Expenditure ◽  
Time Course ◽  
Resting Energy Expenditure ◽  
High Protein ◽  
Long Time ◽  
Protein Feeding ◽  
Resting Energy

Long time course adaptation of glucose metabolism to high protein feeding in rats without changes in resting energy expenditure

Appetite ◽  
2008 ◽  
Vol 51 (2) ◽  
pp. 402
Author(s):  
M. Stepien ◽  
D. Azzout-Marniche ◽  
P.C. Even ◽  
G. Fromentin ◽  
D. Tome ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Energy Expenditure ◽  
Time Course ◽  
Resting Energy Expenditure ◽  
High Protein ◽  
Long Time ◽  
Protein Feeding ◽  
Resting Energy

scholarly journals Evidence for a long time-course adaptation of glucose metabolism to high-protein feeding in rats without major changes in energy expenditure

2008 ◽  
Vol 67 (OCE5) ◽  
Author(s):  
M. Stepien ◽  
D. Azzout-Marniche ◽  
P. Even ◽  
A. Payet ◽  
A. Simonin ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Energy Expenditure ◽  
Time Course ◽  
High Protein ◽  
Long Time ◽  
Protein Feeding

Evidence for a long time-course adaptation of glucose metabolism to high-protein feeding in rats without major changes in energy expenditure

2008 ◽  
Vol 67 (OCE5) ◽  
Author(s):  
M. Stepien ◽  
D. Azzout-Marniche ◽  
P. Even ◽  
A. Payet ◽  
A. Simonin ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Energy Expenditure ◽  
Time Course ◽  
High Protein ◽  
Long Time ◽  
Protein Feeding

Effects of acute α2-blockade on insulin action and secretion in humans

1998 ◽  
Vol 274 (1) ◽  
pp. E57-E64 ◽  
Author(s):  
Andrea Natali ◽  
Amalia Gastaldelli ◽  
Alfredo Quiñones Galvan ◽  
Anna Maria Sironi ◽  
Demetrio Ciociaro ◽  
...  
Keyword(s):  
Insulin Secretion ◽  
Energy Expenditure ◽  
Plasma Insulin ◽  
Time Course ◽  
Resting Energy Expenditure ◽  
Oral Glucose ◽  
Cardiac Work ◽  
C Peptide ◽  
Glucose Ingestion ◽  
Resting Energy

We tested whether acute α2-blockade affects insulin secretion, glucose and fat metabolism, thermogenesis, and hemodynamics in humans. During a 5-h epinephrine infusion (50 ng ⋅ min−1 ⋅ kg−1) in five volunteers, deriglidole, a selective α2-receptor inhibitor, led to a more sustained rise in plasma insulin and C-peptide levels (+59 ± 14 vs. +28 ± 6, and +273 ± 18 vs. +53 ± 14 pM, P < 0.01 vs. placebo) despite a smaller rise in plasma glucose (+0.90 ± 0.4 vs. +1.5 ± 0.3 mM, P < 0.01). Another 10 subjects were studied in the postabsorptive state and during a 4-h hyperglycemic (+4 mM) clamp, coupled with the ingestion of 75 g of glucose at 2 h. In the postabsorptive state, hepatic glucose production, resting energy expenditure, and plasma insulin, free fatty acid (FFA), and potassium concentrations were not affected by acute α2-blockade. Hyperglycemia elicited a biphasic rise in plasma insulin (to a peak of 140 ± 24 pM), C-peptide levels (1,520 ± 344 pM), and insulin secretion (to 410 ± 22 pmol/min); superimposed glucose ingestion elicited a further twofold rise in insulin and C-peptide levels, and insulin secretion. However, α2-blockade failed to change these secretory responses. Fasting blood β-hydroxybutyrate and glycerol and plasma FFA and potassium concentrations all declined with hyperglycemia; time course and extent of these changes were not affected by α2-blockade. Resting energy expenditure (+25 vs. +16%, P < 0.01) and external cardiac work (+28% vs. +19%, P < 0.01) showed larger increments after α2-blockade. We conclude that acute α2-blockade in humans 1) prevents epinephrine-induced inhibition of insulin secretion, 2) does not potentiate basal or intravenous- or oral glucose-induced insulin release, 3) enhances thermogenesis, and 4) increases cardiac work.

scholarly journals Resting costs too: the relative importance of active and resting energy expenditure in a sub-arctic seabird

2022 ◽  
Author(s):  
Fred Tremblay ◽  
Shannon Whelan ◽  
Emily S. Choy ◽  
Scott A. Hatch ◽  
Kyle H. Elliott
Keyword(s):  
Energy Expenditure ◽  
Resting Energy Expenditure ◽  
Central Place ◽  
Average Concentration ◽  
Conservation Strategies ◽  
Energy Costs ◽  
Rissa Tridactyla ◽  
Long Time ◽  
Novel Method ◽  
Resting Energy

Breeding is costly for many animals, including birds that must deliver food to a central place (i.e. nest). Measuring energy expenditure throughout the breeding season can provide valuable insights on physiological limitations by highlighting periods of high demands, and ultimately allows to improve conservation strategies. However, quantifying energy expenditure in wildlife can be challenging, as existing methods do not measure both active (e.g. foraging) and resting energy costs across short and long time scales. Here, we develop a novel method for comparing active and resting costs in 66 pre-breeding and breeding seabirds (black-legged kittiwakes; Rissa tridactyla) by combining accelerometry and triiodothyronine (T3), as proxies for active and resting costs, respectively. Activity energy costs were higher during incubation (p=0.0004) and chick-rearing (p&lt;0.0001) compared to pre-laying, due to an increase in time spent in flight of 11% (p=0.0005) and 15% (p&lt;0.0001), respectively. Levels of T3, reflecting resting costs, peaked marginally during incubation with an average concentration of 4.71±1.97 pg mL−1 in comparison to 2.66±1.30 pg mL−1 in pre-laying (p=0.05), and 3.16±2.85 pg mL−1 in chick-rearing (p=11). Thus, although chick-rearing is often assumed to be the costliest breeding stage by multiple studies, our results suggest that incubation could be more costly due to high resting costs. We highlight the importance of accounting for both active and resting costs when assessing energy expenditure.

Maintenance of resting energy expenditure after weight loss in premenopausal women: potential benefits of a high-protein, reduced-calorie diet

Metabolism ◽  
2008 ◽  
Vol 57 (4) ◽  
pp. 458-464 ◽  
Author(s):  
Stefan M. Pasiakos ◽  
Jodi B. Mettel ◽  
Kristy West ◽  
Ingrid E. Lofgren ◽  
Maria Luz Fernandez ◽  
...  
Keyword(s):  
Weight Loss ◽  
Energy Expenditure ◽  
Premenopausal Women ◽  
Resting Energy Expenditure ◽  
High Protein ◽  
Calorie Diet ◽  
Potential Benefits ◽  
Resting Energy
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