Measuring muscle protein synthesis in humans and the influence of nutritional state
Measuring muscle protein synthesis in humans and the influence of nutritional state
In 1982 and 2011, Clinical Science published papers that used infusion of stable isotope-labeled amino acids to assess skeletal muscle protein synthesis in the fasted and fed state and before and after a period of increased intake of omega-3 fatty acids, respectively; both of these papers have been highly cited. An overview of the study designs, key findings and novel features, and a consideration of the lasting impact of these two papers is presented.
The earlier paper introduced stable isotope tracer approaches in humans that showed consuming a meal will increase whole body oxidation, synthesis, and breakdown of protein, but that protein synthesis is greater than breakdown resulting in net accumulation of protein. The paper also demonstrated that consuming a meal promotes net protein synthesis in skeletal muscle.
The later paper introduced the concept that omega-3 polyunsaturated fatty acids are able to improve anabolism by reporting that 8 weeks consumption of high-dose omega-3 fatty acids by healthy young and middle-aged adults increased skeletal muscle protein synthesis during a hyperaminoacidemic–hyperinsulinemic clamp compared with what was seen during the clamp at study entry. Omega-3 fatty acids also increased the phosphorylation of important signaling proteins in muscle, including mammalian target of rapamycin, p70s6k, and Akt, during the clamp.
These two papers remain relevant because they offer experimental approaches to study human (patho)physiology in different contexts, they present novel insights into the impact of nutritional state (feeding) and specific nutrients (omega-3 fatty acids) on muscle protein synthesis, and they suggest ways to explore the potential of interventions to help prevent and reverse the age-, disease-, and disuse-associated decline in muscle mass.
1425 - 1431
Calder, Philip
1797e54f-378e-4dcb-80a4-3e30018f07a6
Deutz, Nicolaas E.P.
df1b106d-ecf0-434e-87a1-3441f797b855
October 2022
Calder, Philip
1797e54f-378e-4dcb-80a4-3e30018f07a6
Deutz, Nicolaas E.P.
df1b106d-ecf0-434e-87a1-3441f797b855
Calder, Philip and Deutz, Nicolaas E.P.
(2022)
Measuring muscle protein synthesis in humans and the influence of nutritional state.
Clinical Science, 136 (19), .
(doi:10.1042/CS20211171).
Abstract
In 1982 and 2011, Clinical Science published papers that used infusion of stable isotope-labeled amino acids to assess skeletal muscle protein synthesis in the fasted and fed state and before and after a period of increased intake of omega-3 fatty acids, respectively; both of these papers have been highly cited. An overview of the study designs, key findings and novel features, and a consideration of the lasting impact of these two papers is presented.
The earlier paper introduced stable isotope tracer approaches in humans that showed consuming a meal will increase whole body oxidation, synthesis, and breakdown of protein, but that protein synthesis is greater than breakdown resulting in net accumulation of protein. The paper also demonstrated that consuming a meal promotes net protein synthesis in skeletal muscle.
The later paper introduced the concept that omega-3 polyunsaturated fatty acids are able to improve anabolism by reporting that 8 weeks consumption of high-dose omega-3 fatty acids by healthy young and middle-aged adults increased skeletal muscle protein synthesis during a hyperaminoacidemic–hyperinsulinemic clamp compared with what was seen during the clamp at study entry. Omega-3 fatty acids also increased the phosphorylation of important signaling proteins in muscle, including mammalian target of rapamycin, p70s6k, and Akt, during the clamp.
These two papers remain relevant because they offer experimental approaches to study human (patho)physiology in different contexts, they present novel insights into the impact of nutritional state (feeding) and specific nutrients (omega-3 fatty acids) on muscle protein synthesis, and they suggest ways to explore the potential of interventions to help prevent and reverse the age-, disease-, and disuse-associated decline in muscle mass.
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Accepted/In Press date: 21 September 2022
Published date: October 2022
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Funding Information:
Research reported in this publication was supported by the National Institutes of Health under [grant number R56HL141744]. ‘The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health’.
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© 2022 The Author(s). Published by Portland Press Limited on behalf of the Biochemical Society.
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Local EPrints ID: 470766
URI: http://eprints.soton.ac.uk/id/eprint/470766
ISSN: 0143-5221
PURE UUID: 4472f646-67f5-47df-a339-619906742d21
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Date deposited: 19 Oct 2022 17:01
Last modified: 17 Mar 2024 07:32
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Nicolaas E.P. Deutz
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