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Table 4 Levels of tryptophan metabolites in sera (mean ± SD)

From: Repeated inflammatory dural stimulation-induced cephalic allodynia causes alteration of gut microbial composition in rats

  IS group VEH group p-value
L-TRP (µg/mL) 8.89 ± 1.45 9.09 ± 2.13 0.85
5-HT (µg/mL) 2.01 ± 0.32 1.79 ± 0.19 0.19
NAS (ng/mL) 1.05 ± 0.42 0.89 ± 0.58 0.59
5-HIAA (ng/mL) 16.8 ± 5.21 13.2 ± 7.59 0.36
L-KYN (µg/mL) 0.50 ± 0.15 0.49 ± 0.14 0.96
KYNA (ng/mL) 9.86 ± 11.1 15.3 ± 14.8 1.00
XA (ng/mL) 26.1 ± 4.64 29.0 ± 12.6 0.62
IAA (µg/mL) 0.10 ± 0.03 0.11 ± 0.04 0.58
IAld (ng/mL) 1.08 ± 0.70 1.28 ± 0.57 0.39
IEt (ng/mL) 1.18 ± 1.67 1.10 ± 0.95 0.45
ILA (ng/mL) 29.5 ± 5.12 31.9 ± 7.71 0.54
IA (ng/mL) 30.6 ± 19.4 38.5 ± 13.9 0.44
IPA (µg/mL) 0.42 ± 0.26 0.82 ± 0.56 0.15
  1. Levels of PiA, IAM and TRM could not be detected in sera