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Proceedings Paper

Dean flow fractionation of chromosomes
Author(s): Matt Hockin; Himanshu Jayant Sant; Mario Capecchi; Bruce K. Gale
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Paper Abstract

Efforts to transfer intact mammalian chromosomes between cells have been attempted for more than 50 years with the consistent result being transfer of sub unit length pieces regardless of method. Inertial microfluidics is a new field that has shown much promise in addressing the fractionation of particles in the 2-20 μm size range (with unknown limits) and separations are based upon particles being carried by curving confined flows (within a spiral shaped, often rectangular flow chamber) and migrating to stable “equilibrium” positions of varying distance from a chamber wall depending on the balance of dean and lift forces. We fabricated spiral channels for inertial microfluidic separations using a standard soft lithography process. The concentration of chromosomes, small contaminant DNA and large cell debris in each outlets were evaluated using microscope (60X) and a flow cytometer. Using Dean Flow Fractionation, we were able to focus 4.5 times more chromosomes in outlet 2 compared to outlet 4 where most of the large debris is found. We recover 16% of the chromosomes in outlet #1- 50% in 2, 23% in 3 and 11% in 4. It should be noted that these estimates of recovery do not capture one piece of information- it actually may be that the chromosomes at each outlet are physically different and work needs to be done to verify this potential.

Paper Details

Date Published: 18 March 2016
PDF: 8 pages
Proc. SPIE 9705, Microfluidics, BioMEMS, and Medical Microsystems XIV, 970502 (18 March 2016); doi: 10.1117/12.2219842
Show Author Affiliations
Matt Hockin, The Univ. of Utah (United States)
Himanshu Jayant Sant, The Univ. of Utah (United States)
Mario Capecchi, The Univ. of Utah (United States)
Bruce K. Gale, The Univ. of Utah (United States)


Published in SPIE Proceedings Vol. 9705:
Microfluidics, BioMEMS, and Medical Microsystems XIV
Bonnie L. Gray; Holger Becker, Editor(s)

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