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Updated: Mar 24, 2026
Flow Cytometry-based Assay for the Monitoring of NK Cell Functions
Published on: October 30, 2016
Quantification of natural killer cell polarization and visualization of synaptic granule externalization by imaging
Dixita I Viswanath1,2, Emily M Mace2, Hsiang-Ting Hsu2
1Rice University, Houston, TX 77005, USA.
Insights
This study introduces imaging flow cytometry (IFC) to quantify natural killer (NK) cell function, measuring lytic granule secretion at the immune synapse. This high-throughput method provides greater detail than standard flow cytometry, aiding immunobiology research.
Area of Science:
- Immunology
- Cell Biology
- Biotechnology
Background:
- Understanding NK cell immunological mechanisms is vital for treating immune deficiencies and cancers.
- Limited human samples hinder immunobiology studies.
- High-throughput, multiparametric assays are needed for diagnosing immune disorders and advancing NK cell biology.
Purpose of the Study:
- To develop a quantitative method for studying NK cell function using limited human specimens.
- To measure NK cell polarization and lytic granule secretion at the immunological synapse.
- To leverage imaging flow cytometry (IFC) for high-throughput NK cell analysis.
Main Methods:
- Developed and validated a quantitative method using imaging flow cytometry (IFC).
- IFC combines multiparametric flow cytometry and fluorescence microscopy.
- Measured NK cell polarization and lytic granule secretion at the immunological synapse.
Main Results:
- IFC successfully measured NK cell polarization and lytic granule secretion.
- The approach was validated against high-resolution confocal microscopy.
- IFC offers a quantitative, high-throughput measure of NK cell function with enhanced dimensionality.
Conclusions:
- IFC is a powerful tool for advancing NK cell biology research.
- This method maximizes information obtained from limited human cell samples.
- IFC aids in defining and diagnosing immune disorders affecting NK cell function.
Abstract:
Defining immunological mechanisms underlying NK cell biology is crucial for the treatment and prevention of immune deficiency and malignancy. The limited availability of human biological specimens presents a challenge to the study of human immunobiology. The use of high throughput, multi-parametric assays will not only aid in the definition and diagnosis of complex human immune disorders affecting NK cell function but also advance NK cell biology through population-based assessment of molecular signaling. In an effort to garner the most information from limited numbers of human cells, we designed a quantitative method to study NK cell function using imaging flow cytometry (IFC), which combines multiparametric flow cytometry and fluorescence microscopy. Specifically, we developed IFC as a tool to measure polarization and secretion of lytic granules at the immunological synapse formed between an NK cell and a susceptible target. We have further validated our approach through quantitative comparison with high-resolution confocal microscopy. We show that IFC can be used as a quantitative, high throughput measure of NK cell biological function possessing greater dimensionality than standard flow cytometry.
