Abstract
Flow cytometry protocols designed to identify mouse eosinophils typically target Siglec F, an α-2,3-sialic acid binding transmembrane protein expressed universally on cells of this lineage. While a convenient target, antibody-mediated ligation of Siglec F induces eosinophil apoptosis, which limits its usefulness for isolations that are to be followed by functional and/or gene expression studies. We present here a method for FACS isolation which does not target Siglec F and likewise utilizes no antibodies targeting IL5Rα (CD125) or CCR3. Single cell suspensions are prepared from lungs of mice that were sensitized and challenged with Aspergillus fumigatus antigens; eosinophils were identified and isolated by FACS as live SSChi/FSChi CD11c−Gr1−/loMHCII− cells. This strategy was also effective for eosinophil isolation from the lungs of IL5tg mice. Purity by visual inspection of stained cytospin preparations and by Siglec F-diagnostic flow cytometry was 98–99% and 97–99%, respectively. Eosinophils isolated by this method (yield, ~4×106/mouse) generated high-quality RNA suitable for gene expression analysis.
Accepted Version (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call