Publication

Neonatal LTβR signaling is required for the accumulation of eosinophils in the inflamed adult mesenteric lymph node.

Journal Paper/Review - Feb 18, 2022

Units
PubMed
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Citation
Li C, Ward L, Nguyen A, Lam E, Dasoveanu D, Ahmed M, Haniuda K, Buechler M, He H, Ludewig B, McNagny K, Gommerman J. Neonatal LTβR signaling is required for the accumulation of eosinophils in the inflamed adult mesenteric lymph node. Mucosal Immunol 2022; 15:418-427.
Type
Journal Paper/Review (English)
Journal
Mucosal Immunol 2022; 15
Publication Date
Feb 18, 2022
Issn Electronic
1935-3456
Pages
418-427
Brief description/objective

Although eosinophils are important contributors to mucosal immune responses, mechanisms that regulate their accumulation in mucosal-associated lymphoid tissues remain ill-defined. Combining bone marrow chimeras and pharmacological inhibition approaches, here we find that lymphotoxin-beta receptor (LTβR) signaling during the neonatal period is required for the accumulation of eosinophils in the mesenteric lymph nodes (MLN) during an enteric viral infection in adult male and female mice. We demonstrate that MLN stromal cells express genes that are important for eosinophil migration and survival, such as Ccl-11 (eotaxin-1), Ccl7, Ccl9, and Cxcl2, and that expression of most of these genes is downregulated as a consequence of neonatal LTβR blockade. We also find that neonatal LTβR signaling is required for the generation of a rotavirus-specific IgA antibody response in the adult MLN, but eosinophils are dispensable for this response. Collectively, our studies reveal a role for neonatal LTβR signaling in regulating eosinophil numbers in the adult MLN.