Bead-based DNA Microarray Fabricated on Porous Polymer Films

Abstract

By attaching different biomolecule probes to surface-modified microspheres, a large number of complementary targets labeled with fluorophores can be interrogated simultaneously using the bead-based microarray format. In this work, a new bead-based DNA microarray was fabricated on a porous polymer film with well-ordered array of pores. The well-ordered porous polymer film was prepared using the non-lithographic breath figure method. Different biotinylated DNA probes were conjugated to avidin-modified polystyrene (PS) microspheres. The DNA microarray was fabricated by randomly dispersing DNA probe-conjugated PS microspheres into the pores on the polymer film. Multiplexing detection of DNA was performed using target DNAs labeled with ATTO dyes using a fluorescence microscope imaging system. The Bead-based DNA microarray was constructed for detection of four serotypes of Dengue virus. This technique was demonstrated to be a simple and cost-effective method for rapid detection of DNA targets. © International Federation of Medical and Biological Engineering 2009.