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Updated: Aug 1, 2025

A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions

A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions

Published on: November 23, 2015

Analyzing Single Cell Secretions by "Shadow Imaging".

Ashley R Ambrose¹, Khodor S Hazime^1,2, Daniel M Davis^3,4

¹The Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, UK.

Methods in Molecular Biology (Clifton, N.J.)

|April 27, 2023

Summary

This summary is machine-generated.

Shadow imaging analyzes individual cell secretions at immune synapses. This method reveals cellular heterogeneity by examining secreted proteins and vesicles on a single-cell basis.

Keywords:

Bioimaging Cytotoxicity Extracellular vesicles Immune synapse Immunofluorescence Secretion Single-cell analysis

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Last Updated: Aug 1, 2025

A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions

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Published on: November 23, 2015

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Label-Free Imaging of Single Proteins Secreted from Living Cells via iSCAT Microscopy

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Published on: November 20, 2018

Area of Science:

Immunology
Cell Biology
Biochemistry

Background:

Immune synapses are critical for cell-to-cell communication and immune responses.
Analyzing secretions from individual cells at these contacts is challenging.
Understanding cellular secretions is key to deciphering immune cell function and heterogeneity.

Purpose of the Study:

To introduce a novel method, shadow imaging, for analyzing single-cell secretions at immune synapses.
To enable detailed characterization of secreted molecules like perforin and extracellular vesicles.
To provide a new approach for phenotyping immune cell populations based on their secretory profiles.

Main Methods:

Cells form immune synapses on ligand-rich slides.
Pulsed immunofluorescence staining marks cell positions without penetrating the synaptic cleft.
Cellular detachment leaves a 'shadow' of secretions on the slide for analysis.

Main Results:

Secreted components (perforin, exosomes, extracellular vesicles) are retained on the slide.
Analysis of these components is performed on a single-cell basis using immunofluorescence.
The method allows identification of cells secreting distinct combinations of molecules.

Conclusions:

Shadow imaging offers a powerful tool to study immune cell secretions at the single-cell level.
This technique enhances understanding of immune cell heterogeneity and function.
It provides a novel method for precise phenotyping of cell populations based on secretion.