Label-free counting of affinity-enriched circulating tumor cells (CTCs) using a thermoplastic micro-Coulter counter (μCC).

Autor:	Kong C; Department of Chemistry, The University of Kansas, Lawrence, KS 66047, USA and Center of BioModular Multiscale Systems for Precision Medicine, The University of Kansas, Lawrence, KS 66047, USA and Key Laboratory of East China Sea Fishery Resources Exploitation, Ministry of Agriculture and Rural Affairs, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China., Hu M; BioFluidica, Inc., Lawrence, KS 66047, USA. matt@biofluidica.com., Weerakoon-Ratnayake KM; Department of Chemistry, The University of Kansas, Lawrence, KS 66047, USA and Center of BioModular Multiscale Systems for Precision Medicine, The University of Kansas, Lawrence, KS 66047, USA., Witek MA; Department of Chemistry, The University of Kansas, Lawrence, KS 66047, USA and Center of BioModular Multiscale Systems for Precision Medicine, The University of Kansas, Lawrence, KS 66047, USA., Dathathreya K; Department of Chemistry, The University of Kansas, Lawrence, KS 66047, USA and Center of BioModular Multiscale Systems for Precision Medicine, The University of Kansas, Lawrence, KS 66047, USA., Hupert ML; BioFluidica, Inc., Lawrence, KS 66047, USA. matt@biofluidica.com., Soper SA; Department of Chemistry, The University of Kansas, Lawrence, KS 66047, USA and Center of BioModular Multiscale Systems for Precision Medicine, The University of Kansas, Lawrence, KS 66047, USA and BioFluidica, Inc., Lawrence, KS 66047, USA. matt@biofluidica.com and BioEngineering Program, The University of Kansas, Lawrence, KS 66047, USA and Department of Mechanical Engineering, The University of Kansas, Lawrence, KS 66047. ssoper@ku.edu.
Jazyk:	angličtina
Zdroj:	The Analyst [Analyst] 2020 Mar 02; Vol. 145 (5), pp. 1677-1686.
DOI:	10.1039/c9an01802f
Abstrakt:	Coulter counters are used for counting particles and biological cells. Most Coulter counters are designed to analyze a sample without the ability to pre-process the sample prior to counting. For the analysis of rare cells, such as circulating tumor cells (CTCs), it is not uncommon to require enrichment before counting due to the modest throughput of μCCs and the high abundance of interfering cells, such as blood cells. We report a microfluidic-based Coulter Counter (μCC) fabricated using simple, low-cost techniques for counting rare cells that can be interfaced to sample pre- and/or post-processing units. In the current work, a microfluidic device for the affinity-based enrichment of CTCs from whole blood into a relatively small volume of ∼10 μL was interfaced to the μCC to allow for exhaustive counting of single CTCs following release of the CTCs from the enrichment chip. When integrated to the CTC affinity enrichment chip, the μCC could count the CTCs without loss and the cells could be collected for downstream molecular profiling or culturing if required. The μCC sensor counting efficiency was >93% and inter-chip variability was ∼1%.
Databáze:	MEDLINE
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