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D2O Dosing Strategies to Assess Muscle Protein Synthesis — D2O-MPS  

Hypertrophy Clinical Trial

Official title:
The Sensitivity of Differing D2O Dosing Strategies and Mass Spectrometry-based Analytical Techniques to Determine Rates of Muscle Protein Synthesis in Young Men and Women

Clinical Trial Summary

Skeletal muscle mass is regulated by the balance of muscle protein synthesis (MPS) and muscle protein breakdown (MPB). MPS is sensitive to exogenous stimuli, particularly exercise and protein ingestion. Much of what the investigators currently know about the impact of exercise and protein feeding on MPS has been derived from acute stable isotopic tracers in a controlled laboratory setting. However, recently, the field of skeletal muscle protein metabolism has moved towards the use of deuterium oxide (deuterated water (D2O)) to measure MPS. The ease of administration and the scope to measure turnover in a range of substrates whilst negating the need for strictly controlled laboratory settings makes D2O the ideal candidate to provide a more holistic view of in vivo skeletal muscle metabolism.

Clinical Trial Description

Currently, there is a lack of consensus amongst researchers regarding the dosing strategies of D2O provision for measuring fraction-specific (myofibrillar, mitochondrial and sarcoplasmic) protein synthetic rates. In addition, the analytical equipment (i.e., mass spectrometers) required to carry out the analysis of skeletal muscle-bound alanine are technically challenging, offer varying degrees of sensitivity that may drastically influence outcome measures and the expense of analysis differs greatly between the type of mass spectrometer required.Thus, this study will employ different D2O doses to assess basal and exercise plus protein feeding-induced rates of acute and integrated MPS in healthy young men and women. This will provide researchers with insight into the amount of D2O required to accurately assess MPS and the sensitivity of the analytical machine employed. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT04256343
Study type Interventional
Source McMaster University
Contact
Status Withdrawn
Phase N/A
Start date May 1, 2020
Completion date June 1, 2021
View Details
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