Self-recognition drives the preferential accumulation of promiscuous CD4+ t-cells in aged mice

Neha R. Deshpande, Heather L. Parrish, Michael S. Kuhns

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


T-cell recognition of self and foreign peptide antigens presented in major histocompatibility complex molecules (pMHC) is essential for life-long immunity. How the ability of the CD4+ T-cell compartment to bind self- and foreign-pMHC changes over the lifespan remains a fundamental aspect of T-cell biology that is largely unexplored. We report that, while old mice (18–22 months) contain fewer CD4+ T-cells compared with adults (8–12 weeks), those that remain have a higher intrinsic affinity for self-pMHC, as measured by CD5 expression. Old mice also have more cells that bind individual or multiple distinct foreign-pMHCs, and the fold increase in pMHCbinding populations is directly related to their CD5 levels. These data demonstrate that the CD4+ T-cell compartment preferentially accumulates promiscuous constituents with age as a consequence of higher affinity T-cell receptor interactions with self-pMHC.

Original languageEnglish (US)
Article numbere05949
Pages (from-to)1-12
Number of pages12
Issue numberJULY 2015
StatePublished - Jun 14 2015

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Immunology and Microbiology
  • General Neuroscience


Dive into the research topics of 'Self-recognition drives the preferential accumulation of promiscuous CD4+ t-cells in aged mice'. Together they form a unique fingerprint.

Cite this