New advances in stable tracer methods to assess whole-body protein and amino acid metabolism.
Curr Opin Clin Nutr Metab Care
; 22(5): 337-346, 2019 09.
Article
in En
| MEDLINE
| ID: mdl-31192825
ABSTRACT
PURPOSE OF REVIEW Stable isotope methods have been used for many years to assess whole-body protein and amino acid kinetics in healthy conditions and in response to aging, exercise and (clinically stable) disease states. RECENT FINDINGS:
In recent years, tracer research expanded to the anabolic response to feeding in critical illness and its use during acute metabolic stressors. Furthermore, new isotope approaches and tracer insights have been obtained. In the postabsorptive state, the novel tracer pulse approach has several advantages above the established continuous tracer approach because of the metabolic information that can be obtained, easy applicability, and low tracer costs. The use of bolus versus sip-feeding approaches to assess the anabolic response to a meal is dependent on the research question and its feasibility. Promising new tracer approaches have been developed to measure the anabolic capacity, and protein digestibility and absorption. Advances have been made in the field of mass spectrometry in low enrichment analysis.SUMMARY:
Novel tracer approaches are available that can more readily be used in critical illness and during acute metabolic stressors. Besides the use of tracer application in various clinical conditions, more research is needed on how to incorporate isotopes on an individual level.
Full text:
1
Database:
MEDLINE
Main subject:
Proteins
/
Amino Acids
/
Isotope Labeling
Limits:
Humans
Language:
En
Journal:
Curr Opin Clin Nutr Metab Care
Journal subject:
CIENCIAS DA NUTRICAO
/
METABOLISMO
Year:
2019
Type:
Article
Affiliation country:
United States