Parsing digital or analog TCR performance through piconewton forces.
Sci Adv
; 10(33): eado4313, 2024 Aug 16.
Article
em En
| MEDLINE
| ID: mdl-39141734
ABSTRACT
αß T cell receptors (TCRs) principally recognize aberrant peptides bound to major histocompatibility complex molecules (pMHCs) on unhealthy cells, amplifying specificity and sensitivity through physical load placed on the TCR-pMHC bond during immunosurveillance. To understand this mechanobiology, TCRs stimulated by abundantly and sparsely arrayed epitopes (NP366-374/Db and PA224-233/Db, respectively) following in vivo influenza A virus infection were studied with optical tweezers. While certain NP repertoire CD8 T lymphocytes require many ligands for activation, others are digital, needing just few. Conversely, all PA TCRs perform digitally, exhibiting pronounced bond lifetime increases through sustained, energizing volleys of structural transitioning. Optimal digital performance is superior in vivo, correlating with ERK phosphorylation, CD3 loss, and activation marker up-regulation in vitro. Given neoantigen array paucity, digital TCRs are likely critical for immunotherapies.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Linfócitos T CD8-Positivos
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Sci Adv
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos