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Preparation of copolymer-grafted mixed-mode resins for immunoglobulin G adsorption

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Abstract

The mixed-mode resins for protein adsorption have been prepared by a novel strategy, copolymer grafting. Specially, the copolymer-grafted resins CG-M-A with two functional groups, 5-amino-benzimidazole (ABI) and methacryloxyethyltrimethyl ammonium chloride (METAC), have been prepared through surface-initiated activator generated by electron transfer for atom transfer radical polymerization of METAC and glycidyl methacrylate (GMA), followed by a ring-open reaction to introduce ABI. The charge and hydrophobicity of CG-MA resins could be controlled by manipulating the addition of METAC and GMA/ABI. Besides, METAC and ABI provided positive effects together in both protein adsorption and elution: dynamic binding capacity of human Immunoglobulin G (hIgG) onto CG-M-A resin with the highest ligand ratio of METAC to ABI is 46.8 mg∙g–1 at pH 9 and the elution recovery of hIgG is 97.0% at pH 5. The separation experiment showed that purity and recovery of monoclonal antibody from cell culture supernatant are 96.0% and 86.5%, respectively, indicating that copolymer-grafted mixed-mode resins could be used for antibody purification.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China. The authors have declared no conflict of interest.

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Correspondence to Shanjing Yao.

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Chen, S., Liu, T., Yang, R. et al. Preparation of copolymer-grafted mixed-mode resins for immunoglobulin G adsorption. Front. Chem. Sci. Eng. 13, 70–79 (2019). https://doi.org/10.1007/s11705-018-1745-4

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  • DOI: https://doi.org/10.1007/s11705-018-1745-4

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