CD39 deficiency exacerbates cold liver IRI and the systemic inflammatory response associated with enhanced intragraft DC maturation after orthotopic liver transplantation (CD39KO → WT B6, versus WT B6 → WT B6) with 24 hr graft preservation. (A) Serum ALT and AST levels were measured 6 hr after liver transplantation. (B) Histological assessment of liver graft injury 6 hr after liver transplantation (hematoxylin and eosin staining; ×40). (C) Liver damage was assessed by Suzuki score (congestion, vacuolization and necrosis) and necrotic areas were quantified. (D) Systemic (serum) IL-6, TNF-α, and MCP-1 levels were measured by cytokine bead array and serum IL-12p40 levels by ELISA. (E) Liver graft mDC cell surface phenotype was determined by flow cytometry, 6 hr after liver transplantation. (F), Cytokine expression by liver graft mDC, 6 hr after liver transplantation. Liver DC were gated on CD45+CD11c+B220- cells. n=5 transplants per group. *, p<0.05