Sensitive intranuclear flow cytometric quantification of IRF4 protein in multiple myeloma and normal human
Ashni A Vora1, Phoebe K Mondala1, Caitlin Costello2,3
1Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
Abstract:
Interferon regulatory factor 4 (IRF4) is a transcription factor that regulates normal and malignant immune cell development and is implicated in multiple myeloma pathogenesis. This protocol describes the use of combined cell surface and intranuclear staining with fluorescent antibodies to measure IRF4 protein expression within myeloma and normal immune cells. IRF4 protein quantification may provide a valuable prognostic tool to predict disease severity and sensitivity to IRF4-targeted therapies. This flow-cytometry-based procedure could also be rapidly translated into a clinically compatible assay. For complete details on the use and execution of this protocol, please refer to Mondala et al. (2021).
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