• Sci Transl Med · Apr 2016

    Amelioration of sepsis by TIE2 activation-induced vascular protection.

    • Sangyeul Han, Seung-Jun Lee, Kyung Eun Kim, Hyo Seon Lee, Nuri Oh, Inwon Park, Eun Ko, Seung Ja Oh, Yoon-Sook Lee, David Kim, Seungjoo Lee, Dae Hyun Lee, Kwang-Hoon Lee, Su Young Chae, Jung-Hoon Lee, Su-Jin Kim, Hyung-Chan Kim, Seokkyun Kim, Sung Hyun Kim, Chungho Kim, Yoshikazu Nakaoka, Yulong He, Hellmut G Augustin, Junhao Hu, Paul H Song, Yong-In Kim, Pilhan Kim, Injune Kim, and Gou Young Koh.
    • Samsung Advanced Institute of Technology, Suwon, 446-712, Republic of Korea. Center for Vascular Research, Institute for Basic Science, Daejeon 305-701, Republic of Korea. gykoh@kaist.ac.kr syhan69@gmail.com.
    • Sci Transl Med. 2016 Apr 20; 8 (335): 335ra55.

    AbstractProtection of endothelial integrity has been recognized as a frontline approach to alleviating sepsis progression, yet no effective agent for preserving endothelial integrity is available. Using an unusual anti-angiopoietin 2 (ANG2) antibody, ABTAA (ANG2-binding and TIE2-activating antibody), we show that activation of the endothelial receptor TIE2 protects the vasculature from septic damage and provides survival benefit in three sepsis mouse models. Upon binding to ANG2, ABTAA triggers clustering of ANG2, assembling an ABTAA/ANG2 complex that can subsequently bind and activate TIE2. Compared with a conventional ANG2-blocking antibody, ABTAA was highly effective in augmenting survival from sepsis by strengthening the endothelial glycocalyx, reducing cytokine storms, vascular leakage, and rarefaction, and mitigating organ damage. Together, our data advance the role of TIE2 activation in ameliorating sepsis progression and open a potential therapeutic avenue for sepsis to address the lack of sepsis-specific treatment.Copyright © 2016, American Association for the Advancement of Science.

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