Understanding Complex Chromatin Dynamics of Primary Human Neutrophils During PMA Induced NETosis
Atteberry, B.; Berman, B. P.; Kelly, T. K.; Cayford, J.
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BackgroundPrimary human neutrophils play a pivotal role in innate immunity, mainly through the formation of neutrophil extracellular traps (NETs) in a process known as NETosis. This cell-death pathway is crucial for combating infections but is also implicated in many inflammatory diseases such as sepsis, systemic lupus erythematosus, rheumatoid arthritis, and others. MethodsThe study presented here investigates chromatin dynamics during NETosis by stimulating primary human neutrophils with phorbol 12-myristate 13-acetate (PMA). We adapt the ATAC-seq (Assay for Transposase-Accessible Chromatin using sequencing) method to isolated neutrophils and characterize a time-dependent chromatin response. ResultsWe find that chromatin accessibility patterns are consistent across individual donors and most chromatin changes occur within 30 minutes, with many continuing across the 90 minutes assessed in this study. Regulatory regions gaining accessibility are associated with activity of pathways that have been implicated in NOX-dependent NET formation. ConclusionsOur findings enhance the understanding of the chromatin changes underlying NETosis and also identify potential early-acting targets for modulating this process in inflammatory diseases.
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