Adoptive Transfer of Heme Oxygenase-1 (HO-1)-Modified Macrophages Rescues the Nuclear Factor Erythroid 2-Related Factor (Nrf2) Antiinflammatory Phenotype in Liver Ischemia/Reperfusion Injury

作者：Huang, Jing; Shen, Xiu-Da; Yue, Shi; Zhu, Jianjun; Gao, Feng; Zhai, Yuan; Busuttil, Ronald W.; Ke, Bibo^*; Kupiec-Weglinski, Jerzy W.

来源：Molecular Medicine, 2014, 20(1): 448-455.

DOI：10.2119/molmed.2014.00103

• ANTIOXIDANT RESPONSE ELEMENT
• ISCHEMIA-REPERFUSION INJURY
• SIGNALING PATHWAY
• OXIDATIVE STRESS
• NEUTROPHIL INFILTRATION
• INFLAMMATORY RESPONSES
• GENE-EXPRESSION
• UP-REGULATION
• LUNG INJURY
• RAT LIVERS

Macrophages are instrumental in the pathophysiology of liver ischemia/reperfusion injury (IRI). Although Nrf2 regulates macrophage-specific heme oxygenase-1 (HO-1) antioxidant defense, it remains unknown whether HO-1 induction might rescue macrophage Nrf2-dependent antiinflammatory functions. This study explores the mechanisms by which the Nrf2-HO-1 axis regulates sterile hepatic inflammation responses after adoptive transfer of ex vivo modified HO-1 overexpressing bone marrow-derived macrophages (BMMs). Livers in Nrf2-deficient mice preconditioned with Ad-HO-1 BMMs, but not Ad-beta-GalBMMs, ameliorated liver IRI (at 6 h of reperfusion after 90 min of warm ischemia), evidenced by improved hepatocellular serum alanine aminotransferase [sALT] levels) and preserved hepatic architecture (Suzuki histological score). Treatment with Ad-HO-1 BMMs decreased neutrophil accumulation, proinflammatory mediators and hepatocellular necrosis/apoptosis in ischemic livers. Moreover, Ad-HO-1 transfection of Nrf2-deficient BMMs suppressed M1 (Nos2(+)) while promoting the M2 (Mrc-1/Arg-1(+)) phenotype. Unlike in controls, Ad-HO-1 BMMs increased the expression of Notch1, Hes1, phosphorylation of Stat3 and Akt in IR-stressed Nrf2-deficient livers as well as in lipopolysaccharide (LPS)-stimulated BMMs. Thus, adoptive transfer of ex vivo generated Ad-HO-1 BMMs rescued Nrf2-dependent antiinflammatory phenotype by promoting Notch1/Hes1/Stat3 signaling and reprogramming macrophages toward the M2 phenotype. These findings provide the rationale for a novel clinically attractive strategy to manage IR liver inflammation/damage.

• 出版日期2014-7