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Related Experiment Video

Updated: Sep 1, 2025

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

Published on: November 2, 2011

Light-driven single-cell rotational adhesion frequency assay.

Yaoran Liu¹, Hongru Ding², Jingang Li³

¹Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712 USA.

|August 15, 2022

Summary

This summary is machine-generated.

A new optical technique, the single-cell rotational adhesion frequency assay (scRAFA), measures cell-ligand binding kinetics. This label-free method works in clinical settings and native biofluids for disease diagnosis.

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Last Updated: Sep 1, 2025

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

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Published on: November 2, 2011

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Published on: September 27, 2021

Area of Science:

Biophysics
Cell Biology
Biomedical Engineering

Background:

Cell surface receptor-ligand interactions are crucial for physiological processes.
Existing methods for measuring single-cell binding kinetics lack clinical applicability.
There is a need for techniques to assess binding affinity under physiologically relevant shear forces in clinical environments.

Purpose of the Study:

To develop a novel optical technique for label-free determination of cell-ligand binding kinetics.
To enable measurement of binding affinities at the single-cell level in a clinical context.
To provide a method applicable to both homogeneous and heterogeneous binding interactions.

Main Methods:

Development of the single-cell rotational adhesion frequency assay (scRAFA).
scRAFA mimics in vivo cell adhesion to assess binding kinetics.
Label-free determination of binding kinetics at the subcellular level.

Main Results:

scRAFA successfully determines homogeneous and heterogeneous binding kinetics.
The technique is applicable to single cells in native human biofluids.
scRAFA provides physiologically relevant shear binding affinity measurements.

Conclusions:

scRAFA is a novel optical technique for label-free measurement of single-cell binding kinetics.
The assay is suitable for clinical environments and native biofluids.
scRAFA has potential applications in studying receptor organization and diagnosing infectious diseases.