TY - JOUR
T1 - Postprandial protein handling is not impaired in type 2 diabetes patients when compared with normoglycemic controls
AU - Kouw, Imre W.K.
AU - Gorissen, Stefan H.M.
AU - Burd, Nicholas A.
AU - Cermak, Naomi M.
AU - Gijsen, Annemarie P.
AU - Van Kranenburg, Janneau
AU - Van Loon, Luc J.C.
N1 - Publisher Copyright:
Copyright © 2015 by the Endocrine Society.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Context: The progressive loss of muscle mass with aging is accelerated in type 2 diabetes patients. It has been suggested that this is attributed to a blunted muscle protein synthetic response to food intake. Objective: The objective of the study was to test the hypothesis that the muscle protein synthetic response to protein ingestion is impaired in older type 2 diabetes patients when compared with healthy, normoglycemic controls. Design: A clinical intervention study with two parallel groups was conducted between August 2011 and July 2012. Setting: The study was conducted at the research unit of Maastricht University, The Netherlands. Intervention, Participants, and Main Outcome Measures: Eleven older type 2 diabetes males [diabetes; age 71 ± 1 y, body mass index (BMI) 26.2 ± 0.5 kg/m2] and 12 age- and BMI-matched normoglycemic controls (control; age 74 ± 1 y, BMI 24.8 ± 1.1 kg/m2) participated in an experiment in which they ingested 20 g intrinsically L-[1-13 C]phenylalanine-labeled protein. Continuous iv L-[ring-2H5]phenylalanine infusion was applied, and blood and muscle samples were obtained to assess amino acid kinetics and muscle protein synthesis rates in the postabsorptive and postprandial state. Results: Plasma insulin concentrations increased after protein ingestion in both groups, with a greater rise in the diabetes group. Postabsorptive and postprandial muscle protein synthesis rates did not differ between groups and averaged 0.029 ± 0.003 vs 0.029 ± 0.003%/h1 and 0.031 ± 0.002 vs 0.033 ± 0.002%/h1 in the diabetes versus control group, respectively. Postprandial L-[1-13C]phenylalanine incorporation into muscle protein did not differ between groups (0.018 ± 0.001 vs 0.019 ± 0.002 mole percent excess, respectively). Conclusions: Postabsorptive muscle protein synthesis and postprandial protein handling is not impaired in older individuals with type 2 diabetes when compared with age-matched, normoglycemic controls.
AB - Context: The progressive loss of muscle mass with aging is accelerated in type 2 diabetes patients. It has been suggested that this is attributed to a blunted muscle protein synthetic response to food intake. Objective: The objective of the study was to test the hypothesis that the muscle protein synthetic response to protein ingestion is impaired in older type 2 diabetes patients when compared with healthy, normoglycemic controls. Design: A clinical intervention study with two parallel groups was conducted between August 2011 and July 2012. Setting: The study was conducted at the research unit of Maastricht University, The Netherlands. Intervention, Participants, and Main Outcome Measures: Eleven older type 2 diabetes males [diabetes; age 71 ± 1 y, body mass index (BMI) 26.2 ± 0.5 kg/m2] and 12 age- and BMI-matched normoglycemic controls (control; age 74 ± 1 y, BMI 24.8 ± 1.1 kg/m2) participated in an experiment in which they ingested 20 g intrinsically L-[1-13 C]phenylalanine-labeled protein. Continuous iv L-[ring-2H5]phenylalanine infusion was applied, and blood and muscle samples were obtained to assess amino acid kinetics and muscle protein synthesis rates in the postabsorptive and postprandial state. Results: Plasma insulin concentrations increased after protein ingestion in both groups, with a greater rise in the diabetes group. Postabsorptive and postprandial muscle protein synthesis rates did not differ between groups and averaged 0.029 ± 0.003 vs 0.029 ± 0.003%/h1 and 0.031 ± 0.002 vs 0.033 ± 0.002%/h1 in the diabetes versus control group, respectively. Postprandial L-[1-13C]phenylalanine incorporation into muscle protein did not differ between groups (0.018 ± 0.001 vs 0.019 ± 0.002 mole percent excess, respectively). Conclusions: Postabsorptive muscle protein synthesis and postprandial protein handling is not impaired in older individuals with type 2 diabetes when compared with age-matched, normoglycemic controls.
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U2 - 10.1210/jc.2015-1234
DO - 10.1210/jc.2015-1234
M3 - Article
C2 - 26037513
AN - SCOPUS:84939191637
SN - 0021-972X
VL - 100
SP - 3103
EP - 3111
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
IS - 8
ER -