T Cell Ig and Mucin 1 (TIM-1) is Expressed on in Vivo-activated T Cells and Provides a Costimulatory Signal for T Cell Activation
Overview
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Polymorphisms in TIM-1, a member of the T cell Ig and mucin (TIM) domain family, are associated with relative susceptibility to the development of T helper 2-dominated immune responses such as in allergic asthma. Recent data have also suggested that ligation of TIM-1 can augment T cell activation. We have found that the TIM-1 protein is expressed on CD4(+) T cells in vivo after intranasal immunization. Ectopic expression of TIM-1 during T cell differentiation results in a significant increase in the number of cells producing IL-4 but not IFN-gamma. Furthermore, TIM-1 expression provides a costimulatory signal that increases transcription from the IL-4 promoter and from isolated nuclear factor of activated T cells/activating protein-1 (NFAT/AP-1) elements. Finally, we provide evidence that TIM-1 can be phosphorylated on tyrosine and that TIM-1 costimulation requires its cytoplasmic tail and the conserved tyrosine within that domain. These results constitute evidence that TIM-1 directly couples to phosphotyrosine-dependent intracellular signaling pathways.
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Abbasi A, Costafreda M, Ballesteros A, Jacques J, Tami C, Manangeeswaran M Biomedicines. 2024; 12(11).
PMID: 39595207 PMC: 11592376. DOI: 10.3390/biomedicines12112643.
Oeyen M, Heymann C, Jacquemyn M, Daelemans D, Schols D Biosensors (Basel). 2024; 14(8).
PMID: 39194591 PMC: 11352571. DOI: 10.3390/bios14080362.
B-cell-specific checkpoint molecules that regulate anti-tumour immunity.
Bod L, Kye Y, Shi J, Torlai Triglia E, Schnell A, Fessler J Nature. 2023; 619(7969):348-356.
PMID: 37344597 PMC: 10795478. DOI: 10.1038/s41586-023-06231-0.
Novel Roles of the Tim Family in Immune Regulation and Autoimmune Diseases.
Liu Y, Chen H, Chen Z, Qiu J, Pang H, Zhou Z Front Immunol. 2021; 12:748787.
PMID: 34603337 PMC: 8484753. DOI: 10.3389/fimmu.2021.748787.
Wallentin L, Eriksson N, Olszowka M, Grammer T, Hagstrom E, Held C PLoS Med. 2021; 18(1):e1003513.
PMID: 33439866 PMC: 7817029. DOI: 10.1371/journal.pmed.1003513.