Subjects

old men (n = 20)

DM(n = 20)

significance

Tryptophan

1407 ± 272

1323 ± 316

L-5-Hydroxytryptophan

0.014 ± 0.029

0.048 ± 0.038

p < 0.01

Serotonin

0.66 ± 1.45

2.15 ± 4.54

p < 0.05

Kynurenine

35.3 ± 22.4

33.8 ± 11.2

5-hydroxy-tryptophol

Tr

Tr

Tryptophol

Tr

Tr

5-Hydroxyindoleacetic acid

0.634 ± 0.240

0.934 ± 0.405

p < 0.01

Indole-3-acetic acid

42.6 ± 15.0

54.1 ± 28.8

p < 0.01

Anthranilic acid

0.220 ± 0.165

0.298 ± 0.110

Kynurenic acid

1.21 ± 0.41

1.79 ± 0.66

p < 0.01

Quinaldic acid

0.153 ± 0.134

0.156 ± 0.180

3-Indolebutyric acid

0.121 ± 0.097

0.099 ± 0.159

3-Hydroxykynurenine

0.058 ± 0.050

0.105 ± 0.053

3-hydroxyanthranilic acid

0.133 ± 0.149

0.310 ± 0.214

p < 0.01

Xanthurenic acid

0.254 ± 0.109

0.305 ± 0.107