Microfluidic purification and analysis of hematopoietic stem cells from bone marrow

Romana Schirhagl, Ingo Fuereder, Eric W Hall, Bruno C Medeiros, Richard N Zare

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Abstract

Hematopoietic stem cells are larger in size than other cells present in bone marrow, with the exception of monocytes. This distinguishing characteristic can be used to separate them from a whole-marrow sample. A microfluidic device was fabricated using an integrated membrane that is porous at defined areas. This allows for simultaneous valving and filtering functionality, which is crucial for preventing irreversible clogging. This device, as well as a separation procedure, was optimized in this work to enrich hematopoietic progenitor cells from diluted bone marrow of leukemia patients without any additional sample preparation. An enrichment of up to 98% was achieved with this method and the process was scaled up to 17.2 mL min1 of processed sample. Additionally, stem cells were stained with specific antibodies for further analysis. Using a custom-made computer program, the filter was scanned to characterize and quantify cells based on fluorescence. The results were evaluated by comparing them against the results obtained from flow cytometry, confocal microscopy, and Coulter counting.
Original languageEnglish
Pages (from-to)3130-3135
Number of pages6
JournalLab on a Chip - Miniaturisation for Chemistry and Biology
Volume11
Issue number18
DOIs
Publication statusPublished - 2011
Externally publishedYes

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