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. 2016 Jan 4;11(1):e0146279. doi: 10.1371/journal.pone.0146279

Fig 6. The serum L-kynurenine/L-tryptophan ratio and tissue gene expression of IDO and TDO.

Fig 6

A, The serum L-kynurenine/L-tryptophan ratio (Kyn/Trp) was determined at 32 weeks by measuring the concentrations of L-kynurenine and L-tryptophan using HPLC. (B, C) Liver tissues were separated into hepatic tumors and non-tumorous tissues. Total RNA was then extracted and the expression levels of IDO and TDO mRNA were measured using quantitative RT-PCR. Data points represent the mean ± SD. * p<0.05, ** p<0.01, N.S.: not significant