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Antigen availability determines CD8? T cell-dendritic cell interaction kinetics and memory fate decisions.

ABSTRACT: T cells are activated by antigen (Ag)-bearing dendritic cells (DCs) in lymph nodes in three phases. The duration of the initial phase of transient, serial DC-T cell interactions is inversely correlated with Ag dose. The second phase, characterized by stable DC-T cell contacts, is believed to be necessary for full-fledged T cell activation. Here we have shown that this is not the case. CD8? T cells interacting with DCs presenting low-dose, short-lived Ag did not transition to phase 2, whereas higher Ag dose yielded phase 2 transition. Both antigenic constellations promoted T cell proliferation and effector differentiation but yielded different transcriptome signatures at 12 hr and 24 hr. T cells that experienced phase 2 developed long-lived memory, whereas conditions without stable contacts yielded immunological amnesia. Thus, T cells make fate decisions within hours after Ag exposure, resulting in long-term memory or abortive effector responses, correlating with T cell-DCs interaction kinetics.

SUBMITTER: Henrickson SE

PROVIDER: S-EPMC3914670 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature

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Antigen availability determines CD8⁺ T cell-dendritic cell interaction kinetics and memory fate decisions.

Henrickson Sarah E SE Perro Mario M Loughhead Scott M SM Senman Balimkiz B Stutte Susanne S Quigley Michael M Alexe Gabriela G Iannacone Matteo M Flynn Michael P MP Omid Shaida S Jesneck Jonathan L JL Imam Sabrina S Mempel Thorsten R TR Mazo Irina B IB Haining W Nicholas WN von Andrian Ulrich H UH

Immunity 20130901 3

T cells are activated by antigen (Ag)-bearing dendritic cells (DCs) in lymph nodes in three phases. The duration of the initial phase of transient, serial DC-T cell interactions is inversely correlated with Ag dose. The second phase, characterized by stable DC-T cell contacts, is believed to be necessary for full-fledged T cell activation. Here we have shown that this is not the case. CD8⁺ T cells interacting with DCs presenting low-dose, short-lived Ag did not transition to phase 2, whereas hig ...[more]

PMID: 24054328

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Project description:This experiment compares the transciptional changes in antigen specific murine CD8 T cells (P14 T cells) after exposure in vivo to dendritic cells (DC) pulsed with low dose cognate peptide (1uM KAVYNFATC), high dose cognate peptide (100uM KAVYNFATC) or no antigen. Splenic dendritic cells were freshly isolated, peptide pulsed, washed and then adoptively transferred s.c. to the right footpad of C57BL/6 hosts. After 18h, freshly isolated P14 CD8 T cells were labelled with CMFDA and adoptively transferred iv. Two hours after T cell transfer, anti-L selectin antibody was given iv. At 12 and 24 hours, recipients were sacrificed and The right popliteal LN was harvested at 12 or 24h post T cell transfer and a single cell suspension was created and stained with PE CD4, B220 and CD19 (dump channel). Cells were then sorted on a FacsARIA for being non-doublets, CMFDA positive and dump channel negative. This experiment compares the transciptional changes in antigen specific murine CD8 T cells (P14 T cells) after exposure in vivo to dendritic cells (DC) pulsed with low dose cognate peptide (1uM KAVYNFATC), high dose cognate peptide (100uM KAVYNFATC) or no antigen. Splenic dendritic cells were freshly isolated, peptide pulsed, washed and then adoptively transferred s.c. to the right footpad of C57BL/6 hosts. After 18h, freshly isolated P14 CD8 T cells were labelled with CMFDA and adoptively transferred iv. Two hours after T cell transfer, anti-L selectin antibody was given iv. At 12 and 24 hours, recipients were sacrificed and The right popliteal LN was harvested at 12 or 24h post T cell transfer and a single cell suspension was created and stained with PE CD4, B220 and CD19 (dump channel). Cells were then sorted on a FacsARIA for being non-doublets, CMFDA positive and dump channel negative. The experiment was conducted for 39 samples out of which 35 passsed transcriptional quality control tests. The phenotypic distribution for the 35 samples includes: (1) high dose (100uM KAVYNFATC ) cognate peptide pulsed samples harvested at 12h post T cell transfer: 6 biological replicates (2) high dose (100uM KAVYNFATC ) cognate peptide pulsed samples harvested at 24h post T cell transfer: 7 biological replicates (3) low dose (1uM KAVYNFATC) cognate peptide pulsed samples harvested at 12h post T cell transfer: 6 biological replicates (4) low dose (1uM KAVYNFATC) cognate peptide pulsed samples harvested at 24h post T cell transfer: 9 biological replicates (5) no antigen pulsed samples harvested at 12h post T cell transfer: 3 biological replicates (6) no antigen pulsed samples harvested at 24h post T cell transfer: 4 biological replicates.

Dataset Information

Antigen availability determines CD8? T cell-dendritic cell interaction kinetics and memory fate decisions.

Publications

Antigen availability determines CD8⁺ T cell-dendritic cell interaction kinetics and memory fate decisions.

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