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Distinct influences of peptide-MHC quality and quantity on in vivo T-cell responses.
- Source :
- Proceedings of the National Academy of Sciences of the United States of America; 1/17/2012, Vol. 109 Issue 3, p881-886, 6p
- Publication Year :
- 2012
-
Abstract
- The strength of T-cell receptor (TCR) stimulation and subsequent T-cell response depend on a combination of peptide-major histocompatibility complex (pMHC) density and potency. By comparing two different pMHC at doses yielding similar proliferation in vivo, we have highlighted unexpected differences in the qualitative and quantitative effects of TCR ligand. Measurements of cytokine sensitivity and two-photon imaging of T cell-dendritic cell (T-DC) interactions reveal discrimination between comparably weak stimuli resulting from either decreased pMHC potency or pMHC density. In addition, TCR-induced genes in broad gene expression profiles segregate into two groups: one that responds to cumulative TCR signal and another that responds to pMHC quality, independent of quantity. These observations suggest that models of TCR ligand discrimination must account for disparate sensitivity of downstream responses to specific influences of pMHC potency. [ABSTRACT FROM AUTHOR]
- Subjects :
- T cell receptors
LIGANDS (Biochemistry)
DENDRITIC cells
CYTOKINES
HISTOCOMPATIBILITY
Subjects
Details
- Language :
- English
- ISSN :
- 00278424
- Volume :
- 109
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 70585113
- Full Text :
- https://doi.org/10.1073/pnas.1119763109