Reagentless mechanical cell lysis by nanoscale barbs in microchannels for sample preparation

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A highly effective, reagentless, mechanical cell lysis device integrated in microfluidic channels is reported. Sample preparation, specifically cell lysis, is a critical element in 'lab-on-chip' applications. However, traditional methods of cell lysis require purification steps or complicated fabrication steps that a simple mechanical method of lysis may avoid. A simple and effective mechanical cell lysis system is designed, microfabricated, and characterized to quantify the efficiency of cell lysis and biomolecule accessibility. The device functionality is based on a microfluidic filter region with nanostructured barbs created using a modified deep reactive ion etching process. Mechanical lysis is characterized by using a membrane impermeable dye. Three main mechanisms of micro-mechanical lysis are described. Quantitative measurements of accessible protein as compared to a chemically lysed sample are acquired with optical absorption measurements at 280 and 414 nm. At a flow rate of 300 muL min(-1) within the filter region total protein and hemoglobin accessibilities of 4.8% and 7.5% are observed respectively as compared to 1.9% and 3.2% for a filter without nanostructured barbs.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2003
Language
English
Article Type
Article
Keywords

PCR AMPLIFICATION; ESCHERICHIA-COLI; BLOOD-CELLS; DEVICE; LATTICE

Citation

LAB ON A CHIP, v.3, no.4, pp.287 - 291

ISSN
1473-0197
DOI
10.1039/b305162e
URI
http://hdl.handle.net/10203/81751
Appears in Collection
BiS-Journal Papers(저널논문)
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