| First Author | Matheu MP | Year | 2015 |
| Journal | Nat Commun | Volume | 6 |
| Pages | 6219 | PubMed ID | 25653051 |
| Mgi Jnum | J:221363 | Mgi Id | MGI:5638974 |
| Doi | 10.1038/ncomms7219 | Citation | Matheu MP, et al. (2015) Imaging regulatory T cell dynamics and CTLA4-mediated suppression of T cell priming. Nat Commun 6:6219 |
| abstractText | Foxp3(+) regulatory T cells (Tregs) maintain immune homoeostasis through mechanisms that remain incompletely defined. Here by two-photon (2P) imaging, we examine the cellular dynamics of endogenous Tregs. Tregs are identified as two non-overlapping populations in the T-zone and follicular regions of the lymph node (LN). In the T-zone, Tregs migrate more rapidly than conventional T cells (Tconv), extend longer processes and interact with resident dendritic cells (DC) and Tconv. Tregs intercept immigrant DCs and interact with antigen-induced DC:Tconv clusters, while continuing to form contacts with activated Tconv. During antigen-specific responses, blocking CTLA4-B7 interactions reduces Treg-Tconv interaction times, increases the volume of DC:Tconv clusters and enhances subsequent Tconv proliferation in vivo. Our results demonstrate a role for altered cellular choreography of Tregs through CTLA4-based interactions to limit T-cell priming. |
