A Simple Fluorescence Assay for Quantification of Canine Neutrophil Extracellular Trap Release. Academic Article uri icon


  • Neutrophil extracellular traps are networks of DNA, histones and neutrophil proteins released in response to infectious and inflammatory stimuli. Although a component of the innate immune response, NETs are implicated in a range of disease processes including autoimmunity and thrombosis. This protocol describes a simple method for canine neutrophil isolation and quantification of NETs using a microplate fluorescence assay. Blood is collected using conventional venipuncture techniques. Neutrophils are isolated using dextran sedimentation and a density gradient using conditions optimized for dog blood. After allowing time for attachment to the wells of a 96 well plate, neutrophils are treated with NET-inducing agonists such as phorbol-12-myristate-13-acetate or platelet activating factor. DNA release is measured by the fluorescence of a cell-impermeable nucleic acid dye. This assay is a simple, inexpensive method for quantifying NET release, but NET formation rather than other causes of cell death must be confirmed with alternative methods.

altmetric score

  • 0.5

author list (cited authors)

  • Jeffery, U., Gray, R. D., & LeVine, D. N.

citation count

  • 5

complete list of authors

  • Jeffery, Unity||Gray, Robert D||LeVine, Dana N

publication date

  • November 2016