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Uncontrolled bleeding can also occur in the setting of an overdose of the anticoagulant heparin, leading to a need for compounds with anti-heparin activity. A novel approach to this problem takes advantage of engineered virus-like particles derived from bacteriophage Q¦Â (Udit et al. 2009). By generating point mutations to the coat protein and covalent attachment of poly-arginine peptides, the surface charge of the virus-like particles could be widely varied since the capsid consists of 180 coat proteins. Using an activated partial thrombin time clotting assay, they identifi ed modifi ed particles that inhibited heparin-mediated anticoagulation by > 95%. The inhibition is believed to be by presentation of regions with high positive charge density to bind heparin¡¯s extensively sulfated domains |
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ÍõÀÚÀÚ0811: ½ð±Ò+10, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2013-04-09 16:45:46
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