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Supplementing essential amino acids with the nitric oxide precursor, l-arginine, enhances skeletal muscle perfusion without impacting anabolism in older men (2016)
Journal Article
Mitchell, W. K., Phillips, B. E., Wilkinson, D. J., Williams, J. P., Rankin, D., Lund, J. N., …Atherton, P. J. (2017). Supplementing essential amino acids with the nitric oxide precursor, l-arginine, enhances skeletal muscle perfusion without impacting anabolism in older men. Clinical Nutrition, 36(6), https://doi.org/10.1016/j.clnu.2016.09.031

Postprandial limb blood flow and skeletal muscle microvascular perfusion reduce with aging. Here we tested the impact of providing bolus essential amino acids (EAA) in the presence and absence of the nitric oxide precursor, l-Arginine (ARG), upon ske... Read More about Supplementing essential amino acids with the nitric oxide precursor, l-arginine, enhances skeletal muscle perfusion without impacting anabolism in older men.

Human Skeletal Muscle Disuse Atrophy: Effects on Muscle Protein Synthesis, Breakdown, and Insulin Resistance—A Qualitative Review (2016)
Journal Article
Rudrappa, S. S., Wilkinson, D., Greenhaff, P. L., Smith, K., Idris, I., & Atherton, P. J. (2016). Human Skeletal Muscle Disuse Atrophy: Effects on Muscle Protein Synthesis, Breakdown, and Insulin Resistance—A Qualitative Review. Frontiers in Physiology, 7(361), https://doi.org/10.3389/fphys.2016.00361

The ever increasing burden of an ageing population and pandemic of metabolic syndrome worldwide demands further understanding of the modifiable risk factors in reducing disability and morbidity associated with these conditions. Disuse skeletal muscle... Read More about Human Skeletal Muscle Disuse Atrophy: Effects on Muscle Protein Synthesis, Breakdown, and Insulin Resistance—A Qualitative Review.

Metformin Increases Cortisol Regeneration by 11βHSD1 in Obese Men With and Without Type 2 Diabetes Mellitus (2016)
Journal Article
Anderson, A. J., Andrew, R., Homer, N. Z., Jones, G. C., Smith, K., Livingstone, D. E., …Stimson, R. H. (2016). Metformin Increases Cortisol Regeneration by 11βHSD1 in Obese Men With and Without Type 2 Diabetes Mellitus. Journal of Clinical Endocrinology and Metabolism, 101(10), 3787-3793. https://doi.org/10.1210/jc.2016-2069

CONTEXT: The mechanism of action of metformin remains unclear. Given the regulation of the cortisol-regenerating enzyme 11βhydroxysteroid dehydrogenase 1 (11βHSD1) by insulin and the limited efficacy of selective 11βHSD1 inhibitors to lower blood gl... Read More about Metformin Increases Cortisol Regeneration by 11βHSD1 in Obese Men With and Without Type 2 Diabetes Mellitus.

Human Skeletal Muscle Protein Metabolism Responses to Amino Acid Nutrition (2016)
Journal Article
Mitchell, W. K., Wilkinson, D. J., Phillips, B. E., Lund, J. N., Smith, K., & Atherton, P. J. (2016). Human Skeletal Muscle Protein Metabolism Responses to Amino Acid Nutrition. Advances in Nutrition, 7(4), 828S-838S. https://doi.org/10.3945/an.115.011650

Healthy individuals maintain remarkably constant skeletal muscle mass across much of adult life, suggesting the existence of robust homeostatic mechanisms. Muscle exists in dynamic equilibrium whereby the influx of amino acids (AAs) and the resulting... Read More about Human Skeletal Muscle Protein Metabolism Responses to Amino Acid Nutrition.

Mitochondrial function and dynamics imaged in vivo (2016)
Book Chapter
Chisholm, K., Peters, F., Schiza, D. G., Sadeghian, M., & Smith, K. (2016). Mitochondrial function and dynamics imaged in vivo. In A. K. Reeve, E. M. Simcox, M. R. Duchen, & D. M. Turnbull (Eds.), Mitochondrial Dysfunction in Neurodegenerative Disorders (329-345). Cham: Springer. https://doi.org/10.1007/978-3-319-28637-2_14

The previous chapters have described the extraordinary depth of knowledge of mitochondrial biology revealed by in vitro observations where the environment can be closely controlled. However, in recent years there has been increased interest in the st... Read More about Mitochondrial function and dynamics imaged in vivo.

Enriching a protein drink with leucine augments muscle protein synthesis after resistance exercise in young and older men (2016)
Journal Article
Atherton, P. J., Kumar, V., Selby, A. L., Rankin, D., Hildebrandt, W., Phillips, B. E., Williams, J. P., Hiscock, N., & Smith, K. (2017). Enriching a protein drink with leucine augments muscle protein synthesis after resistance exercise in young and older men. Clinical Nutrition, 36(3), 888-895. https://doi.org/10.1016/j.clnu.2016.04.025

Maximizing anabolic responses to feeding and exercise is crucial for muscle maintenance and adaptation to exercise training. We hypothesized that enriching a protein drink with leucine would improve anabolic responses to resistance exercise (RE: 6×8... Read More about Enriching a protein drink with leucine augments muscle protein synthesis after resistance exercise in young and older men.

Acute cocoa flavanol supplementation improves muscle macro- and microvascular but not anabolic responses to amino acids in older men (2016)
Journal Article
Phillips, B. E., Atherton, P. J., Varadhan, K., Limb, M. C., Williams, J. P., & Smith, K. (in press). Acute cocoa flavanol supplementation improves muscle macro- and microvascular but not anabolic responses to amino acids in older men. Applied Physiology, Nutrition, and Metabolism, 41(5), https://doi.org/10.1139/apnm-2015-0543

The anabolic effects of nutrition on skeletal muscle may depend on adequate skeletal muscle perfusion, which is impaired in older people. Cocoa flavanols have been shown to improve flow-mediated dilation, an established measure of endothelial functio... Read More about Acute cocoa flavanol supplementation improves muscle macro- and microvascular but not anabolic responses to amino acids in older men.