Phosphate ester serum albumin affinity tags greatly improve peptide half-life in vivo
摘要:
A series of phosphate ester based small molecules designed to bind tightly to serum albumin were applied to the amino terminus of an anticoagulant peptide in an effort to increase its protein binding in vivo. The tagged peptides exhibited high affinity for both rabbit and human serum albumin when passed through liquid chromatographic columns with serum albumins incorporated into the stationary phase. The peptides were then administered intravenously to rabbits and found to have a greater than 50-fold increase in plasma half life. The highest affinity peptides showed a reduction in bioactivity consistent with their sequestration away from their protein target in the presence of 0.1% rabbit serum albumin. (C) 2003 Elsevier Science Ltd. All rights reserved.
[EN] COMPSTATIN ANALOGS WITH IMPROVED POTENCY AND PHARMACOKINETIC PROPERTIES [FR] ANALOGUES DE COMPSTATINE DE PUISSANCE ET DE PROPRIÉTÉS PHARMACOCINÉTIQUES AMÉLIORÉES
[EN] COMPSTATIN ANALOGS WITH IMPROVED POTENCY AND PHARMACOKINETIC PROPERTIES<br/>[FR] ANALOGUES DE COMPSTATINE DE PUISSANCE ET DE PROPRIÉTÉS PHARMACOCINÉTIQUES AMÉLIORÉES
申请人:UNIV PENNSYLVANIA
公开号:WO2015142701A1
公开(公告)日:2015-09-24
Compounds comprising peptides capable of binding C3 protein and inhibiting complement activation are disclosed. The compounds include a modified compstatin peptide or analog thereof, comprising an added N-terminal component that improves (1) the binding affinity of the peptide to C3, C3b or C3c and/or (2) the plasma stability and/or plasma residence time of the peptide, as compared with an unmodified compstatin peptide under equivalent conditions. Methods of improving the C3 binding of compstatin or compstatin analogs are also disclosed, as well as methods of designing compstatin analogs with improved C3 binding.
BIOMOLECULES HAVING MULTIPLE ATTACHMENT MOIETIES FOR BINDING TO A SUBSTRATE SURFACE
申请人:Schweitzer Markus
公开号:US20100286377A1
公开(公告)日:2010-11-11
Methods of binding biomolecules to a substrate are provided that include contacting the biomolecule with a branched linking moiety to form a branched linking structure. The branched linking structure is then contacted with a binding moiety on the substrate to form a coupled substrate binding structure, thereby binding the biomolecule to the substrate. The biomolecule may contain a Lewis base or a nucleophile to react with a Lewis acid or electrophile in the branched linking moiety. Alternatively, the biomolecule may contain a Lewis acid or electrophile that can react with a Lewis base or nucleophile in the branched linking moiety. Additionally, the biomolecule can be bound to the substrate through a covalent or non-covalent bond.