LAB-ON-CHIP-BASED CELL SEPARATION BY COMBINING DIELECTROPHORESIS AND CENTRIFUGATION

Cell-based approaches in medicine, biotechnology and in pharmaceutical research offer unique prospects to cope with future challenges in the field of public health. Stem cell research, autologous cell therapies and tissue engineering are only a few possible key applications. Progress in these fields will depend on the successful implementation of versatile and flexible tools for the gentle manipulation and characterization of cells. In recent years, we and others have introduced microfluidic lab-on-chip systems that include dielectrophoretic elements for the contact-less handling and the analysis of cells. Here, we present results that were obtained by combining our labon-on-chip devices with a low-cost centrifugation stage for the efficient and gentle separation of microparticles and live human cells. Our approach is supposed to overcome limitations that arise from the use of bulky and expensive external pumping stages.

[1]  Gabriele Gradl,et al.  The potential of dielectrophoresis for single-cell experiments. , 2003, IEEE engineering in medicine and biology magazine : the quarterly magazine of the Engineering in Medicine & Biology Society.

[2]  M. Stelzle,et al.  Microdevices for separation, accumulation, and analysis of biological micro- and nanoparticles. , 2003, IEE proceedings. Nanobiotechnology.

[3]  R. Zengerle,et al.  Frequency-dependent transversal flow control in centrifugal microfluidics. , 2005, Lab on a chip.

[4]  Martin Stelzle,et al.  Versatile chip-based tool for the controlled manipulation of microparticles in biology using high Frequency Electromagnetic Fields , 2004 .

[5]  P. Gascoyne,et al.  Particle separation by dielectrophoresis , 2002, Electrophoresis.

[6]  Peter R C Gascoyne,et al.  Dielectrophoretic segregation of different human cell types on microscope slides. , 2005, Analytical chemistry.

[7]  R. Zengerle,et al.  Visualization of flow patterning in high-speed centrifugal microfluidics , 2005 .

[8]  Rashid Bashir,et al.  A multifunctional micro-fluidic system for dielectrophoretic concentration coupled with immuno-capture of low numbers of Listeria monocytogenes. , 2006, Lab on a chip.

[9]  R. Hagedorn,et al.  Laser-direct-write creation of three-dimensional OREST microcages for contact-free trapping, handling and transfer of small polarizable neutral objects in solution , 2005 .

[10]  Claus Duschl,et al.  Controlling electrohydrodynamic pumping in microchannels through defined temperature fields , 2006 .