Immunoglobulin M regulates airway hyperresponsiveness independent of T helper 2 allergic inflammation.

ABSTRACT: Allergic asthma is a disease driven by T helper 2 (Th2) cells, eosinophilia, airway hyperresponsiveness (AHR), and IgE-secreting B cells. Asthma is largely controlled by corticosteroids and β₂ adrenergic receptor agonists that target and relax airway smooth muscle (ASM). Immunoglobulin M (IgM) isotype secreted by naïve B cells is important for class switching but may have other undefined functions. We investigated the role of IgM in a house dust mite (HDM)-induced Th2 allergic asthma model. We sensitised wild-type (WT) and IgM-deficient (IgM KO) mice with HDM and measured AHR, and Th2 responses. We performed RNA sequencing on the whole lung of WT and IgM KO mice sensitised to saline or HDM. We validated our AHR data on human ASM by deleting genes using CRISPR and measuring contr

SUBMITTER: Hadebe S 

PROVIDER: S-EPMC12707823 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature