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Vascular Injury Involves the Overoxidation of Peroxiredoxin Type II and Is Recovered by the Peroxiredoxin Activity Mimetic That Induces Reendothelialization

  • Kang, Dong Hoon (Division of Life and Pharmaceutical Science and Center for Cell Signaling and Drug Discovery Research) , Lee, Doo Jae (Division of Life and Pharmaceutical Science and Center for Cell Signaling and Drug Discovery Research) , Kim, Jiran (Division of Life and Pharmaceutical Science and Center for Cell Signaling and Drug Discovery Research) , Lee, Joo Young (Division of Life and Pharmaceutical Science and Center for Cell Signaling and Drug Discovery Research) , Kim, Hyun-Woo (Department of Neurology, Yonsei University College of Medicine, Seoul, Korea) , Kwon, Kihwan (Department of Cardiology, College of Medicine, Ewha Womans University, Seoul, Korea) , Taylor, W. Robert (Division of Cardiology, Emory University School of Medicine, Atlanta, GA) , Jo, Hanjoong (Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta) , Kang, Sang Won (강상원, Division of Life and Pharmaceutical Science and Center for Cell Signaling and Drug Discovery Research , Department of Life Science, College of Medicine, Ewha Womans University, Seoul, Korea)
  • CIRCULATION[0009-7322], 2013, v.128 no.8, 834-844

초록/요약

Background Typical 2-Cys peroxiredoxin (Prx) is inactivated by overoxidation of the peroxidatic cysteine residue under oxidative stress. However, the significance in the context of vascular disease is unknown. Methods and Results Immunohistochemical analyses revealed that 2-Cys Prxs, particularly Prx type II, are heavily overoxidized in balloon-injured rodent carotid vessels and in human atherosclerotic lesions. Consistent with this observation, the selective depletion of Prx II exacerbated neointimal hyperplasia in injured carotid vessels. We also found that the epipolythiodioxopiperazine class of fungal metabolites exhibited an enzyme-like activity mimicking 2-Cys Prx peroxidase and manifestly eliminated the intracellular H2O2 in the vascular cells. Functionally, the epipolythiodioxopiperazines reciprocally regulated the platelet-derived growth factor receptor-- and vascular endothelial growth factor receptor-mediated signaling in these vascular cells by replacing Prx II. As a consequence, the epipolythiodioxopiperazines inhibited the proliferative and migratory activities of smooth muscle cells but promoted those of endothelial cells in vitro. Moreover, administration of the epipolythiodioxopiperazines to the injured carotid vessels resulted in a successful recovery by inhibiting neointimal hyperplasia without causing cytotoxicity and simultaneously inducing reendothelialization. Conclusions This study reveals for the first time the involvement of the 2-Cys Prx overoxidation and thus the therapeutic use of their activity mimetic in vascular injuries like stenting.

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