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Poly(glycidyl methacrylate-co-2-hydroxyethyl Methacrylate) Brushes as Peptide/Protein Microarray Substrate for Improving Protein Binding and Functionality

Zhen Lei, Jiaxue Gao, Xia Liu, Dianjun Liu, Zhenxin Wang

ACS Appl Mater Interfaces. 2016 Apr 27;8(16):10174-82.

PMID: 27049528

Abstract:

We developed a three-dimensional (3D) polymer-brush substrate for protein and peptide microarray fabrication, and this substrate was facilely prepared by copolymerization of glycidyl methacrylate (GMA) and 2-hydroxyethyl methacrylate (HEMA) monomers via surface-initiated atom transfer radical polymerization (SI-ATRP) on a glass slide. The performance of obtained poly(glycidyl methacrylate-co-2-hydroxyethyl methacrylate) (P(GMA-HEMA)) brush substrate was assessed by binding of human IgG with rabbit antihuman IgG antibodies on a protein microarray and by the determination of matrix metalloproteinase (MMP) activities on a peptide microarray. The P(GMA-HEMA) brush substrate exhibited higher immobilization capacities for proteins and peptides than those of a two-dimensional (2D) planar epoxy slide. Furthermore, the sensitivity of the P(GMA-HEMA) brush-based microarray on rabbit antihuman IgG antibody detection was much higher than that of its 2D counterpart. The enzyme activities of MMPs were determined specifically with a low detection limit of 6.0 pg mL(-1) for MMP-2 and 5.7 pg mL(-1) for MMP-9. By taking advantage of the biocompatibility of PHEMA, the P(GMA-HEMA) brush-based peptide microarray was also employed to evaluate the secretion of MMP-2 and MMP-9 by cells cultured off the chip or directly on the chip, and satisfactory results were obtained.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP224962383 Poly(pentafluorostyrene-co-glycidyl methacrylate) Poly(pentafluorostyrene-co-glycidyl methacrylate) 224962-38-3 Price
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