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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).