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Albumin‐coated monodisperse magnetic poly(glycidyl methacrylate) microspheres with immobilized antibodies: Application to the capture of epithelial cancer cells
Author(s) -
Horák Daniel,
Svobodová Zuzana,
Autebert Julien,
Coudert Benoit,
Plichta Zdeněk,
Královec Karel,
Bílková Zuzana,
Viovy JeanLouis
Publication year - 2013
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.34297
Subject(s) - glycidyl methacrylate , materials science , glutaraldehyde , dispersity , epithelial cell adhesion molecule , polymerization , carbodiimide , superparamagnetism , bovine serum albumin , albumin , dispersion polymerization , adsorption , chemical engineering , chromatography , polymer chemistry , polymer , chemistry , cell , biochemistry , organic chemistry , magnetization , physics , quantum mechanics , magnetic field , engineering , composite material
Monodisperse (4 μm) macroporous crosslinked poly(glycidyl methacrylate) (PGMA) microspheres for use in microfluidic immunomagnetic cell sorting, with a specific application to the capture of circulating tumor cells (CTCs), were prepared by multistep swelling polymerization in the presence of cyclohexyl acetate porogen and hydrolyzed and ammonolyzed. Iron oxide was then precipitated in the microspheres to render them magnetic. Repeated precipitation made possible to raise the iron oxide content to more than 30 wt %. To minimize nonspecific adsorption of the microspheres in a microchannel and of cells on the microspheres, they were coated with albumin crosslinked with glutaraldehyde. Antibodies of epithelial cell adhesion molecule (anti‐EpCAM) were then immobilized on the albumin‐coated magnetic microspheres using the carbodiimide method. Capture of breast cancer MCF7 cells as a model of CTCs by the microspheres with immobilized anti‐EpCAM IgG was performed in a batch experiment. Finally, MCF7 cells were captured by the anti‐EpCAM‐immobilized albumin‐coated magnetic microspheres in an Ephesia chip. A very good rejection of lymphocytes was achieved. Thus, albumin‐coated monodisperse magnetic PGMA microspheres with immobilized anti‐EpCAM seem to be promising for capture of CTCs in a microfluidic device. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 101A:23–32, 2013.