Hybrid Monoliths for Magnetically-Driven Protein Separations

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Abstract

Monoliths represent powerful platforms for isolation of large molecules with high added value. This work presents a hybrid approach for antibody (Ab) capture and release. Using mostly natural polymers and clean processes, it is possible to create macroporous monoliths with well-defined porous networks, tuneable mechanical properties, and easy functionalization with a biomimetic ligand specific for Ab. Magnetic nanoparticles (MNPs) are embedded on the monolith network to confer a controlled magnetic response that facilitates and accelerates Ab recovery in the elution step. The hybrid monolithic systems prepared with agarose or chitosan/poly(vinyl alcohol) (PVA) blends exhibit promising binding capacities of Abs directly from cell-culture extracts (120 +/- 10 mg Ab g(-1) support) and controlled Ab magnetically-assisted elution yielding 95 +/- 2% recovery. Moreover, a selective capture of mAbs directly from cell culture extracts is achieved yielding a final mAb preparation with 96% of purity.

Original languageEnglish
Pages (from-to)4528-4541
Number of pages14
JournalAdvanced Functional Materials
Volume24
Issue number28
DOIs
Publication statusPublished - 23 Jul 2014

Keywords

  • IRON-OXIDE NANOPARTICLES
  • AFFINITY-CHROMATOGRAPHY
  • BIOMEDICAL APPLICATIONS
  • ANTIBODY PURIFICATION
  • CHITOSAN SCAFFOLDS
  • POLYMERS
  • DELIVERY
  • DEXTRAN
  • POLYSACCHARIDES
  • BIOSEPARATION

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