Published November 9, 2022 | Version v1
Journal article

Phenotyping polarization dynamics of immune cells using a lipid droplet-cell pairing microfluidic platform

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Description

The immune synapse is the tight contact zone between a lymphocyte and a cell presenting its cognate antigen. This structure serves as a signaling platform and entails a polarization of intracellular components necessary to the immunological function of the cell. While the surface properties of the presenting cell are known to control the formation of the synapse, their impact on polarization has not yet been studied. Using functional lipid droplets as tunable artificial presenting cells combined with a microfluidic pairing device, we simultaneously observe synchronized synapses and dynamically quantify polarization patterns of individual B cells. By assessing how ligand concentration, surface fluidity, and substrate rigidity impact lysosome po-larization, we show that its onset and kinetics depend on the local antigen concentration at the synapse and on substrate rigidity. Our experimental system enables a fine phenotyping of monoclonal cell populations based on their synaptic readout.

Abstract

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Additional details

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URL
https://hal.archives-ouvertes.fr/hal-03853948
URN
urn:oai:HAL:hal-03853948v1

Origin repository

Origin repository
UNICA