Phospho-flow cytometry detects intracellular phosphorylated signaling proteins in single cells using phospho-specific antibodies after rapid fixation and permeabilization; the fluorescence intensity reflects phosphorylation state and therefore kinase-pathway activation, inhibition, or drug response in defined cell subsets. Unlike Western blot, phospho-flow preserves single-cell resolution and can measure signaling heterogeneity in cancer cells, primary immune cells, dissociated mouse tumors, macrophages, organoid-derived cells, and drug-screening samples when validated antibodies and fixation/permeabilization conditions are used.
Phospho-Flow Cytometry
Phospho-flow cytometry is a cutting-edge technique for the precise measurement of intracellular protein phosphorylation at the single-cell level, designed to resolve complex signaling networks with high resolution. Unlike traditional methods, it enables the simultaneous detection of multiple phosphorylation events and cell-surface markers within heterogeneous cell populations, thereby accurately correlating specific biochemical signaling changes with distinct cell subsets. In immunology and oncology research, this technique is frequently employed to assess the responsiveness of immune cells to cytokine stimulation, offering vital insights into the pathological mechanisms of cancer and autoimmune disorders. Additionally, it serves as a powerful tool for high-throughput drug screening, allowing researchers to evaluate the impact of targeted therapies on signaling pathways and to characterize their pharmacokinetic properties.
Related Experimental Schemes
