Nuocytes from mesenteric lymph node promote allergic responses in a mouse model

Abstract Introduction Nuocytes play an important role in Type 2 immunity. However, the contribution of ILC2s to allergic rhinitis remains to be clearly elucidated. Objective To evaluate the role of nuocytes from mesenteric lymph node on allergic responses in mice. Methods After intraperitoneal administration of interleukin IL-25 and IL-33 to wild-type and Il17br−/−Il1rl1−/− double-deficient mice, nuocytes were purified from the the nasal-associated lymphoid tissue and mesenteric lymph nodes. Then, we assessed productions of IL-5 and IL-13 in nuocytes’ cultures. Finally, we adoptively transferred the mesenteric lymph node-derived nuocytes from wild-type and Il17br−/−Il1rl1−/− mice to the murine model of allergic rhinitis to evaluate their roles in nasal allergic responses. Results We showed that nuocytes in the mesenteric lymph nodes of wild-type mice were upregulated after application of IL-25 and IL-33, and were induced to produce IL-5 and IL-13. Numbers of sneezing and nasal rubbing as well as eosinophils were all enhanced after the adoptive transfer of wild-type nuocytes. Concentrations of IL-5, IL-13, IL-25 and IL-33 in nasal lavage fluid of allergic mice were also increased. However, nuocytes fromIl17br−/−Il1rl1−/− mice did not increase sneezing and nasal rubbing and eosinophilia, and upregulate the above cytokines in the nasal lavage fluid. Conclusion The findings demonstrate that nuocytes from the mesenteric lymph nodes of wild-type mice promote allergic responses in a mouse model.