LV activation of DCs and subsequent CD8+ T cell priming are dependent on STING and cGAS but not on MyD88, TRIF, or MAVS. LV activation of DCs and subsequent.

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LV activation of DCs and subsequent CD8+ T cell priming are dependent on STING and cGAS but not on MyD88, TRIF, or MAVS. LV activation of DCs and subsequent CD8+ T cell priming are dependent on STING and cGAS but not on MyD88, TRIF, or MAVS. (A and B) BMDCs from mice singly or doubly deficient in MyD88, TRIF, and MAVS were treated with LV-GFP(V) or LV-GFP(S) and analyzed at 24 hours for expression of CD86 and I-Ab by flow cytometry. (C to F) Mice deficient in MyD88, TRIF, MAVS, STING, or cGAS were immunized with LV-OVA. Unimmunized wild-type (WT) mice were injected with PBS. OVA-tetramer+ cells gated on CD8+ T cells from the blood were demonstrated on representative FACS plot at 10 days after primary immunization (C) or measured over time (D to F) (left). Statistical comparisons were made between the OVA-tetramer+ CD8+ T cell response of the LV-immunized wild-type mice and that of the LV-immunized mutant mice. CD62Llo and CD44hi OVA-tetramer+ CD8+ T cells from LV-immunized mutant and wild-type mice were compared with naïve CD8+ T cells from unimmunized mice at 10 days on representative FACS plots (D to F) (middle) or by group with each symbol representing an individual mouse and horizontal bar indicating the mean (D to F) (right). n = 6 mutant immunized mice per group; n = 4 wild-type immunized and unimmunized mice per group (C and D). n = 6 mice in Tmem173−/− immunized and unimmunized wild-type groups; n = 10 mice in wild-type immunized group (E). n = 8 per group (F). Data are representative of three (A and B) or two (C to E) independent experiments or pooled from two independent experiments (F). Results are shown as mean ± SEM (A, B, and D to F). P > 0.05; *P < 0.05; **P < 0.005 [one way-ANOVA (A, B, and D) and unpaired Student’s t test (E and F)]. Jocelyn T. Kim et al. Sci. Immunol. 2017;2:eaal1329 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works