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Table 2 Plasma glucose, insulin, leucine and phenylalanine concentrations during basal, postabsorptive conditions and during the hyperinsulinemic-hyperaminoacidemic-euglycemic clamp procedure

From: Sexually dimorphic effect of aging on skeletal muscle protein synthesis

  Young Old
Basal Clamp Basal Clamp
MEN     
Glucose (mM) 5.0 ± 0.1 5.4 ± 0.1a 5.1 ± 0.1 5.4 ± 0.1a
Insulin (mU·l-1) 6.5 ± 1.4 29.1 ± 2.0a 7.1 ± 1.2 31.3 ± 3.2a
Leucine (μM) 123 ± 7 166 ± 12a 118 ± 7 176 ± 10a
Phenylalanine (μM) 56 ± 7 98 ± 12a 64 ± 8 111 ± 12a
WOMEN     
Glucose (mM) 4.8 ± 0.1 5.4 ± 0.1a 4.9 ± 0.1 5.5 ± 0.1a
Insulin (mU·l-1) 5.2 ± 1.2 32.3 ± 5.9a 5.2 ± 1.0 32.3 ± 2.2a
Leucine (μM) 99 ± 7b 131 ± 12a,b 104 ± 5b 137 ± 9a,b
Phenylalanine (μM) 61 ± 3 119 ± 10a 61 ± 3 109 ± 4a
  1. Values are mean ± SEM. a Value significantly different from corresponding value during basal conditions (P < 0.001). b Value significantly different from corresponding value in men (P < 0.01).