Abstract
Molecularly imprinted polymers that could recognize the tripeptide Arg-Gly-Asp have been produced with the use of two functional monomers and three different cross-linkers, respectively. Methacrylic acid and acrylamide were used as functional monomers and the role of the ethylene glycol dimethacrylate, trimethylpropane trimethacrylate and N,N′-methylene-bisacrylamide as crosslinking monomers, was investigated on their recognition capability. The % net rebinding and the imprinting factor values were obtained, giving for the methacrylic acid–trimethylpropane trimethacrylate polymer the highest values 12.3% and 2.44, respectively. In addition, this polymer presented lower dissociation constant (K D) value and the higher B max% of theoretical total binding sites than all the other polymers. Rebinding experiments with Lys-Gly-Asp, an analogue of Arg-Gly-Asp, and other different peptides, such as cholecystokinin C-terminal tri- and pentapeptide and gramicidin, further indicated the selectivity of methacrylic acid-trimethylpropane trimethacrylate copolymer for Arg-Gly-Asp giving specific selectivity factor values 1.27, 1.98, 1.31 and 1.67, respectively.
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Abbreviations
- ABCN:
-
Azo-bis-cyclohexane-carbonitrile
- RGD:
-
Arg-Gly-Asp tripeptide
- KGD:
-
Lys-Gly-Asp tripeptide
- CCK-3, CCK-5:
-
Cholecystokinin C-terminal tripeptide and pentapeptide, respectively
- EGDMA:
-
Ethylene glycol dimethacrylate
- TRIM:
-
Trimethylpropane trimethacrylate
- MAA:
-
Methacrylic acid
- MIPs:
-
Molecularly imprinted polymers
- NIPs:
-
Non imprinted polymers
- SEM:
-
Scanning electron microscopy
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Papaioannou, E., Koutsas, C. & Liakopoulou-Kyriakides, M. Molecularly imprinted polymers for RGD selective recognition and separation. Amino Acids 36, 563–569 (2009). https://doi.org/10.1007/s00726-008-0118-6
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DOI: https://doi.org/10.1007/s00726-008-0118-6