Acute rejection score of IDO+ allografts was significantly lower than controls.
ECM proteins along with SAGM media could guide rat MSCs into type I and II AECs.
Inducible expression of IDO significantly downregulated IFNɣ and TNF-α expression.
Local IDO expression could upregulate FOXP3, a Tregulatory cell marker.
RANTES were downregulated in IDO expressing allografts.