Treatment of biological samples using dielectrophoresis

Chemistry: electrical and wave energy – Processes and products – Electrophoresis or electro-osmosis processes and electrolyte...

Reexamination Certificate

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C204S643000

Reexamination Certificate

active

07988841

ABSTRACT:
A plurality of planar electrodes (5) in a microchannel (4) is used for separation, lysis and PCR in a chip (10). Cells from a sample are brought to the electrodes (5). Depending on sample properties, phase pattern, frequency and voltage of the electrodes and flow velocity are chosen to trap target cells (16) using DEP, whereas the majority of unwanted cells (17) flushes through. After separation the target cell (16) are lysed while still trapped. Lysis is carried out by applying RF pulses and/or thermally so as to change the dielectric properties of the trapped cells. After lysis, the target cells (16) are amplified within the microchannel (4), so as to obtain separation, lysis and PCR on same chip (1).

REFERENCES:
patent: 6071394 (2000-06-01), Cheng et al.
patent: 6235471 (2001-05-01), Knapp et al.
patent: 6280590 (2001-08-01), Cheng et al.
patent: 6403338 (2002-06-01), Knapp et al.
patent: 6727451 (2004-04-01), Fuhr et al.
patent: 6749736 (2004-06-01), Fuhr et al.
patent: 6783647 (2004-08-01), Culbertson et al.
patent: 2002/0036142 (2002-03-01), Gascoyne et al.
patent: 2002/0088712 (2002-07-01), Miles
patent: 2004/0011650 (2004-01-01), Zenhausern et al.
patent: 1403383 (2004-03-01), None
patent: WO9322058 (1993-11-01), None
Bard et al., Electrochemical detection of single molecules. Acc. Chem. Res. 29:572-8, (1996).
Bashir, R., Electronic detection of bio-species on a chip. National Nanofabrication Users Network, Cornell Nanoscale Facility, CNF Project # 827-00, p. 40.
Cheng et al., Preparation and hybridization analysis of DNA/RNA fromE. coilon microfabricated bioelectric chips. Nat Biotechnol. 16:541-6, (1998).
Derouich-Guergour et al., A lab-on-chip for cell sorting and manipulation based on dielectrophoresis; effect of beads on cell levitation. Brochure, Minatec 2003 Applications, Inserm, Grenoble, France.
Erickson et al., Integrated microfluidic devices—Review. Analytica Chimica Acta. 507:11-26, (2004).
Gascoyne et al., Dielectrophoresis-based sample handling in general-purpose programmable diagnostic instruments. Proceedings of the IEEE. 92:22-42, (2004).
Gascoyne et al., Microfluidic approaches to malaria detection. Acta Tropica. 89:357-69, (2004).
Hofmann et al., Passive DNA sensor with gold electrodes fabricated in a CMOS backend process. Infineon Technologies, Munich, Germany, (2002).
Holmes et al., Cell positioning and sorting using dielectrophoresis. EU Cells & Materials. 4:120-2, (2002).
Holmes et al., Microdevices for dielectrophoretic flow-through cell separation. IEEE Engineering in Medicine and Biology Magazine. Nov./Dec. 2003, pp. 85-90.
Huang et al., Universal platform for developing an integrated biochip or micro-TAS based on electrokinetics. Tamkang Journal of Science and Engineering. 7:107-10, (2004).
Karolis et al., Differential effects of cholesterol and oxidized-cholesterol in egg lecithin bilayers. Biochimica et Biophysica Acta. 1368:247-55, (1998).
Lapizco-Encinas et al, Insulator-based dielectrophoresis for the selective concentration and separation of live bacteria in water. Electrophoresis. 25:1695-1704, (2004).
Lee et al., A micro cell lysis device. Caltech Micromachining Laboratory, California Institute of Technology, Pasadena, California, USA (1999).
Malnar et al., Laboratory-on-a-chip device for DNA separation detection in medical diagnostics. www.brunel.ac.uk, ESIT Research Group, Brunel University, Uxbridge, Middlesex, United Kingdom.
Medoro et al., A lab-on-a-chip for cell separation based on the moving-cages approach. Silicon Biosystems, Bologna, Italy (2002).
Muller et al., Reversible electropermeabilization of mammalian cells by high-intensity, ultra-short pulses of submicrosecond duration. J. Membrane Biol. 184:161-70, (2001).
Schnelle et al., Paired microelectrode system: dielectrophoretic particle sorting and force calibration. Journal of Electrostatics. 47:121-32, (1999).
Wang et al., Cell separation by dielectrophoretic field-flow-fractionation. Anal Chem. 72:832-9. (2000).
Xu et al., Functional biochips for cell and molecular manipulation. AVIVA Biosciences Corporation, San Diego, California.
Anonymous, Dielectrophoresis. Web article, www.informatics.bangor.ac.uk./˜burt/dep/dep.htm, University of Bangor Wales, Bangor, Gwynedd, United Kingdom.

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