Pyridoxal-5-Phosphate Promotes Immunomodulatory Function of Adipose-Derived Mesenchymal Stem Cells through Indoleamine 2,3-Dioxygenase-1 and TLR4/NF-κB Pathway

Figure 15

Kynurenic acid levels in supernatant of T lymphocytes coculture with A-MSCs stimulated by 0 ng/mL, 10 ng/mL, 20 ng/mL, 50 ng/mL, 100 ng/mL, and 1000 ng/mL PLP. The concentration of kynurenic acid was maximum at 50 ng/mL and 100 ng/mL. There was no significant difference in kynurenic acid levels at 1000 ng/mL and 50 ng/mL.