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Table 3 Plasma levels of kynurenine (KYN), kynurenic acid (KYNA) and tryptophan (TRP)

From: B7 costimulation and intracellular indoleamine-2,3-dioxygenase (IDO) expression in peripheral blood of healthy pregnant and non-pregnant women

  Non-pregnant women (n = 14) Healthy pregnant women (n = 20)
KYN (uM) 1.80 (1.70-2.08) 1.55* (1.31-1.83)
KYNA (nM) 29.8 (25.6-47.7) 18.8* (15.0-23.0)
TRP (uM) 54.1 (49.0-59.3) 38.6* (33.9-42.5)
K/T ratio 0.037 (0.032-0.040) 0.041* (0.038-0.045)
  1. *p < 0.05 versus non-pregnant women. Data are presented as median (interquartile range).