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Increased amplification efficiency of microchip-based PCR by dynamic surface passivation

2004; Future Science Ltd; Volume: 36; Issue: 2 Linguagem: Inglês

10.2144/04362st01

1940-9818

Xing Jian Lou, Nicholas J. Panaro, Peter Wilding, Paolo Fortina, Larry J. Kricka,

Microfluidic and Bio-sensing Technologies

Surface passivation is critical for effective PCR using silicon-glass chips. We tested a dynamic polymer-based surface passivation method. Polyethylene glycol 8000 (PEG 8000) or polyvinylpyrrolidone 40 (PVP-40) applied at 0.75% (w/v) in the reaction mixture produced significant surface passivation effects using either native or SiO2-precoated silicon-glass chips. PCR amplification was achieved from human genomic DNA as a template as well as from human lymphocytes. The dynamic surface passivation effect of PEG 8000 remained similar under both conditions. Dynamic surface passivation offers a simple and cost-effective method to make microfabricated silicon-glass chips PCR friendly. It can also be used in combination with static passivation (silicon oxide surface layer) to further improve PCR performance using silicon-glass PCR chips.