Coclustering of CD4 (L3T4) Molecule with the T-cell Receptor is Induced by Specific Direct Interaction of Helper T Cells and Antigen-presenting Cells
Overview
Authors
Affiliations
Blocking studies with monoclonal antibodies have suggested that helper T cell recognition and triggering involve the CD4 (L3T4) accessory molecule as well as the T-cell receptor (TCR) that is linked to the T3 complex. We have investigated the surface distribution of L3T4 and TCR during the direct interaction of a cloned murine helper T-cell line with an antigen-presenting B-cell line. Using immunofluorescence microscopy, we show that in 1:1 cell couples formed between the two cells, in which a specific interaction can be demonstrated, the L3T4 and the TCR become redistributed on the T-cell surface so that they are concentrated in the cell-cell contact region. This coclustering of L3T4 with TCR occurs only when the relevant antigen and appropriate major histocompatibility class II molecules are presented to the T cell, and it therefore requires the specific interaction of the TCR with its complex ligand on the antigen-presenting cell.
Coreceptors and TCR Signaling - the Strong and the Weak of It.
Morch A, Balint S, Santos A, Davis S, Dustin M Front Cell Dev Biol. 2020; 8:597627.
PMID: 33178706 PMC: 7596257. DOI: 10.3389/fcell.2020.597627.
Evolving immune circuits are generated by flexible, motile, and sequential immunological synapses.
Gerard A, Beemiller P, Friedman R, Jacobelli J, Krummel M Immunol Rev. 2013; 251(1):80-96.
PMID: 23278742 PMC: 3539221. DOI: 10.1111/imr.12021.
Visualization of Cell-Cell Interaction Contacts: Synapses and Kinapses.
Dustin M Self Nonself. 2012; 2(2):85-97.
PMID: 22299060 PMC: 3268994. DOI: 10.4161/self.2.2.17931.
Nagarajan U, Sikes J, Prantner D, Andrews Jr C, Frazer L, Goodwin A Infect Immun. 2010; 79(1):486-98.
PMID: 21078858 PMC: 3019903. DOI: 10.1128/IAI.00843-10.
Co-receptors and recognition of self at the immunological synapse.
Gascoigne N, Zal T, Yachi P, Hoerter J Curr Top Microbiol Immunol. 2009; 340:171-89.
PMID: 19960314 PMC: 5788015. DOI: 10.1007/978-3-642-03858-7_9.