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Live vaccines historically afford superior protection, yet the cellular and molecular mechanisms mediating protective immunity remain unclear. Here we found that vaccination of mice with live, but not dead, Gram-negative bacteria heightened follicular T helper cell (Tfh) differentiation, germinal center formation, and protective antibody production through the signaling adaptor TRIF. Complementing...
Protective immunity against pathogens depends on the efficient generation of functionally diverse effector and memory T lymphocytes. However, whether plasticity during effector-to-memory CD8+ T cell differentiation affects memory lineage specification and functional versatility remains unclear. Using genetic fate mapping analysis of highly cytotoxic KLRG1+ effector CD8+ T cells, we demonstrated that...
Intestinal macrophages are critical for gastrointestinal (GI) homeostasis, but our understanding of their role in regulating intestinal motility is incomplete. Here, we report that CX3C chemokine receptor 1-expressing muscularis macrophages (MMs) were required to maintain normal GI motility. MMs expressed the transient receptor potential vanilloid 4 (TRPV4) channel, which senses thermal, mechanical,...
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