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Yang H, Wang Y, Xiao Y, Wang Y, Wu J, Liu C, Ye H, Li F, Yu H, Lai R. A bi-functional anti-thrombosis protein containing both direct-acting fibrin(ogen)olytic and plasminogen-activating activities. PLoS One 2011; 6:e17519. [PMID: 21423730 PMCID: PMC3056663 DOI: 10.1371/journal.pone.0017519] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Accepted: 02/03/2011] [Indexed: 11/18/2022] Open
Abstract
UNLABELLED Direct-acting fibrin(ogen)olytic agents such as plasmin have been proved to contain effective and safety thrombolytic potential. Unfortunately, plasmin is ineffective when administered by the intravenous route because it was neutralized by plasma antiplasmin. Direct-acting fibrin(ogen)olytic agents with resistance against antiplasmin will brighten the prospect of anti-thrombosis. As reported in 'Compendium of Materia Medica', the insect of Eupolyphaga sinensis Walker has been used as traditional anti-thrombosis medicine without bleeding risk for several hundreds years. Currently, we have identified a fibrin(ogen)olytic protein (Eupolytin1) containing both fibrin(ogen)olytic and plasminogen-activating (PA) activities from the beetle, E. sinensis. OBJECTIVES To investigate the role of native and recombinant eupolytin1 in fibrin(ogen)olytic and plasminogen-activating processes. METHODS AND RESULTS Using thrombus animal model, eupolytin1 was proved to contain strong and rapid thrombolytic ability and safety in vivo, which are better than that of urokinase. Most importantly, no bleeding complications were appeared even the intravenous dose up to 0.12 µmol/kg body weight (3 times of tested dose which could completely lyse experimental thrombi) in rabbits. It is the first report of thrombolytic agents containing both direct-acting fibrin(ogen)olytic and plasminogen-activating activities. CONCLUSIONS The study identified novel thrombolytic agent with prospecting clinical potential because of its bi-functional merits containing both plasmin- and PA-like activities and unique pharmacological kinetics in vivo.
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Affiliation(s)
- Hailong Yang
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Graduate School of the Chinese Academy of Sciences, Beijing, China
| | - Yipeng Wang
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Graduate School of the Chinese Academy of Sciences, Beijing, China
| | - Yao Xiao
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Graduate School of the Chinese Academy of Sciences, Beijing, China
| | - Ying Wang
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Graduate School of the Chinese Academy of Sciences, Beijing, China
| | - Jing Wu
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Graduate School of the Chinese Academy of Sciences, Beijing, China
| | - Cunbao Liu
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Graduate School of the Chinese Academy of Sciences, Beijing, China
| | - Huahu Ye
- Institute of Biotechnology, The Academy of Military Medical Sciences, Beijing, China
| | - Fengliang Li
- Department of Laboratory Medicine, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Haining Yu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China
- * E-mail: (RL); (HY)
| | - Ren Lai
- Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
- Life Sciences College of Nanjing Agricultural University, Nanjing, Jiangsu, China
- * E-mail: (RL); (HY)
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Larionov SN, Sorokovikov VA, Novozilov VA. Management of acute subdural hematomas in infants: intrathecal infusion streptokinase for clot lysis combined with subdural to subgaleal shunt. Childs Nerv Syst 2008; 24:437-42. [PMID: 17899125 DOI: 10.1007/s00381-007-0496-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Indexed: 11/30/2022]
Abstract
OBJECT Subdural hematomas (SDHs) in full-term infants have the potential to cause death or lifelong disability. We report management and outcomes of eight cases of newborn with large SDH treated by streptokinase (SK) lavage and drainage. MATERIALS AND METHODS Between 2003 and 2006, eight infants with large acute SDH with focal or diffuse hypodensity showing signs and symptoms of neurological deterioration were treated by drainage and subdural SK lavage. There were eight full-term infants, five boys and three girls, with ages between 10 days and 2 months. Head injuries were shaken baby syndrome in three cases, fall from height in three cases, caused by traffic accident in one case, and reportedly not due to trauma in one case. In all patients, SDHs were unilateral. We used a new surgical approach, SDH evacuation, involving the subdural instillation of SK for lysis and after drainage of acute SDH in infants. Follow-up in the series ranged from 1 to 42 months (average 30 months). There was no mortality in this series, neither in the early postoperative period nor in the follow-up period. Five patients of this series lead a normal life; two children were mildly neurodevelopmentally delayed. CONCLUSION Subdural infusion of SK followed by drainage may be as safe and effective for treatment of acute SDHs in infants as other reported methods.
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Affiliation(s)
- Sergey N Larionov
- Department of Neurosurgery, Irkutsk Medical University, Irkutsk, Russia.
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