Delayed treatment with ADAMTS13 ameliorates cerebral ischemic injury without hemorrhagic complication

作者：Nakano Takafumi; Irie Keiichi^*; Hayakawa Kazuhide; Sano Kazunori; Nakamura Yoshihiko; Tanaka Masayoshi; Yamashita Yuta; Satho Tomomitsu; Fujioka Masayuki; Muroi Carl; Matsuo Koichi; Ishikura Hiroyasu; Futagami Kojiro; Mishima Kenichi

来源：Brain Research, 2015, 1624: 330-335.

DOI：10.1016/j.brainres.2015.07.027

• ADAMTS13
• Tissue plasminogen activator
• Cerebral ischemic stroke
• Therapeutic time window
• Hemorrhagic complication

Tissue plasminogen activator (tPA) is the only approved therapy for acute ischemic stroke. However, delayed tPA treatment increases the risk of cerebral hemorrhage and can result in exacerbation of nerve injury. ADAMTS13, a von Willebrand factor (VWF) cleaving protease, has a protective effect against ischemic brain injury and may reduce bleeding risk by cleaving VWF. We examined whether ADAMTS13 has a longer therapeutic time window in ischemic stroke than tPA in mice subjected to middle cerebral artery occlusion (MCAO). ADAMTS13 (0.1 mg/kg) or tPA (10 mg/kg) was administered i.v., immediately after reperfusion of after 2-h or 4-h MCAO for comparison of the therapeutic time windows in ischemic stroke. Infarct volume, hemorrhagic volume, plasma high-mobility group box1 (HMGB1) levels and cerebral blood flow were measured 24 h after MCAO. Both ADAMTS13 and tPA improved the infarct volume without hemorrhagic complications in 2-h MCAO mice. On the other hand, ADAMTS13 reduced the infarct volume and plasma HMGB1 levels, and improved cerebral blood flow without hemorrhagic complications in 4-h MCAO mice, but tPA was not effective and these animals showed massive intracerebral hemorrhage. These results indicated that ADAMTS13 has a longer therapeutic time window in ischemic stroke than tPA, and ADAMTS13 may be useful as a new therapeutic agent for ischemic stroke.

• 出版日期2015-10-22