title: Magnetic porous sugar-functionalized PEG microgels for efficient isolation and removal of bacteria from solution.
abstract: Here, we present a new microparticle system for the selective detection and magnetic removal of bacteria from contaminated solutions. The novelty of this system lies in the combination of a biocompatible scaffold reducing unspecific interactions with high capacity for bacteria binding. We apply highly porous poly(ethylene glycol) (PEG) microparticles and functionalize them, introducing both sugar ligands for specific bacteria targeting and cationic moieties for electrostatic loading of superparamagnetic iron oxide nanoparticles. The resulting magnetic, porous, sugar-functionalized (MaPoS) PEG microgels are able to selectively bind and discriminate between different strains of bacteria Escherichia coli . Furthermore, they allow for a highly efficient removal of bacteria from solution as their increased surface area can bind three times more bacteria than nonporous particles. All in all, MaPoS particles represent a novel generation of magnetic beads introducing for the first time a porous, biocompatible and easy to functionalize scaffold and show great potential for various biotechnological applications.
authors.affiliation: Max-Planck-Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam-Golm, Germany.
authors.forename: Muriel
authors.initials: M
authors.lastname: Behra
authors.forename: Nahid
authors.initials: N
authors.lastname: Azzouz
authors.forename: Stephan
authors.initials: S
authors.lastname: Schmidt
authors.forename: Dmitry V
authors.initials: DV
authors.lastname: Volodkin
authors.forename: Simone
authors.initials: S
authors.lastname: Mosca
authors.forename: Munish
authors.initials: M
authors.lastname: Chanana
authors.forename: Peter H
authors.initials: PH
authors.lastname: Seeberger
authors.forename: Laura
authors.initials: L
authors.lastname: Hartmann
mesh_terms: D001419:Bacteria / Q000302:isolation & purification*; D002241:Carbohydrates / Q000737:chemistry*; D005782:Gels; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles; D011092:Polyethylene Glycols / Q000378:metabolism*; D012996:Solutions
chemical_list: D002241:Carbohydrates; D005782:Gels; D012996:Solutions; D011092:Polyethylene Glycols