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Wan Y, Liu Y, Allen PB, Asghar W, Mahmood MAI, Tan J, Duhon H, Kim YT, Ellington AD, Iqbal SM. Capture, isolation and release of cancer cells with aptamer-functionalized glass bead array. LAB ON A CHIP 2012; 12:4693-701. [PMID: 22983436 PMCID: PMC3498495 DOI: 10.1039/c2lc21251j] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Early detection and isolation of circulating tumor cells (CTC) can enable better prognosis for cancer patients. A Hele-Shaw device with aptamer functionalized glass beads is designed, modeled, and fabricated to efficiently isolate cancer cells from a cellular mixture. The glass beads are functionalized with anti-epidermal growth factor receptor (EGFR) aptamer and sit in ordered array of pits in polydimethylsiloxane (PDMS) channel. A PDMS encapsulation is then used to cover the channel and to flow through cell solution. The beads capture cancer cells from flowing solution depicting high selectivity. The cell-bound glass beads are then re-suspended from the device surface followed by the release of 92% cells from glass beads using combination of soft shaking and anti-sense RNA. This approach ensures that the cells remain in native state and undisturbed during capture, isolation and elution for post-analysis. The use of highly selective anti-EGFR aptamer with the glass beads in an array and subsequent release of cells with antisense molecules provide multiple levels of binding and release opportunities that can help in defining new classes of CTC enumeration devices.
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Affiliation(s)
- Yuan Wan
- Department of Bioengineering, University of Texas at Arlington, Arlington, Texas
- Nano-BioLab, University of Texas at Arlington, Arlington, Texas
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas
| | - Yaling Liu
- Department of Mechanical Engineering and Mechanics, Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania
| | - Peter B. Allen
- Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, Texas
| | - Waseem Asghar
- Nano-BioLab, University of Texas at Arlington, Arlington, Texas
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas
| | - M. Arif Iftakher Mahmood
- Nano-BioLab, University of Texas at Arlington, Arlington, Texas
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas
| | - Jifu Tan
- Department of Mechanical Engineering and Mechanics, Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania
| | - Holli Duhon
- Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, Texas
| | - Young-tae Kim
- Department of Bioengineering, University of Texas at Arlington, Arlington, Texas
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas
| | - Andrew D. Ellington
- Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, Texas
| | - Samir M. Iqbal
- Department of Bioengineering, University of Texas at Arlington, Arlington, Texas
- Nano-BioLab, University of Texas at Arlington, Arlington, Texas
- Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, Texas
- Department of Electrical Engineering, University of Texas at Arlington, Arlington, Texas
- Joint Graduate Committee of Bioengineering Program, University of Texas at Arlington and University of Texas Southwestern Medical Center at Dallas, University of Texas at Arlington, Arlington, Texas
- Corresponding Author: Samir M. Iqbal, Ph.D., 500 S. Cooper St, M.S. 19072, Room #217, University of Texas at Arlington, Arlington, TX 76019, , Ph: +1-817-272-0228, Fax: +1-817-272-7458
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