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Arginase II inhibited lipopolysaccharide-induced cell death by regulation of iNOS and Bcl-2 family proteins in macrophages
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  • 作者:Eun Ji Lee (12332)
    Yu Ran Lee (12332)
    Hee Kyoung Joo (12332)
    Eun Jung Cho (12332)
    Sunga Choi (12332)
    Kyung-Cheol Sohn (22332)
    Sang Do Lee (12332)
    Jin Bong Park (12332)
    Byeong Hwa Jeon (12332)
  • 关键词:Arginase II ; Bax ; lipopolysaccharide ; macrophage ; nitric oxide
  • 刊名:Molecules and Cells
  • 出版年:2013
  • 出版时间:May 2013
  • 年:2013
  • 卷:35
  • 期:5
  • 页码:396-401
  • 全文大小:606KB
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  • 作者单位:Eun Ji Lee (12332)
    Yu Ran Lee (12332)
    Hee Kyoung Joo (12332)
    Eun Jung Cho (12332)
    Sunga Choi (12332)
    Kyung-Cheol Sohn (22332)
    Sang Do Lee (12332)
    Jin Bong Park (12332)
    Byeong Hwa Jeon (12332)

    12332. Infectious Signaling Network Research Center, Department of Physiology, School of Medicine, Daejeon, 301-747, Korea
    22332. Department of Dermatology, School of Medicine, Chungnam National University, Daejeon, 301-747, Korea
  • ISSN:0219-1032
文摘
Arginase II catalyzes the conversion of arginine to urea and ornithine in many extrahepatic tissues. We investigated the protective role of arginase II on lipopolysaccharide-mediated apoptosis in the macrophage cells. Adenoviral gene transfer of full length of arginase II was performed in the murine macrophage cell line RAW264.7. The role of arginase II was investigated with cell viability, cytoplasmic histone-associated DNA fragmentation assay, arginase activity, nitric oxide production, and Western blot analysis. Arginase II is localized in mitochondria of macrophage cells, and the expression of arginase II was increased by lipopolysaccharide (LPS). LPS significantly increased cell death which was inhibited by AMT, a specific inducible nitric oxide synthase (iNOS) inhibitor. In contrast, LPS-induced cell death and nitric oxide production were increased by 2-boronoethyl-L-cysteine, a specific inhibitor of arginase. Adenoviral overexpression of arginase II significantly inhibited LPS-induced cell death and cytoplasmic histone-associated DNA fragmentation. LPS-induced iNOS expression and poly ADP-ribose polymerase cleavage were significantly suppressed by arginase II overexpression. Furthermore, arginase II overexpression resulted in a decrease in the Bax protein level and the reverse induction of Bcl-2 protein. Our data demonstrated that inhibition of NO production by arginase II may be due to arginine depletion as well as iNOS suppression though its reaction products. Moreover, arginase II plays a protective role of LPS-induced apoptosis in RAW264.7 cells.

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