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Eosinophils Bolster Maternal Intestinal Immunity During Reproduction
Maternal immunity must balance generalized tolerance for the fetus with protection against environmental pathogens. While systemic immune adaptation during pregnancy is well-established, how barrier tissues (e.g., the intestine) maintain innate defense against pathogens during reproduction remains unclear. In addition, little is known about whether these adaptations persist postnatally.
In a new Nature study, Huang et al. reveal that eosinophils play an unexpected role in intestinal remodeling and innate defense during reproduction (1). Using mouse models, genetic and pharmacologic manipulations, organoids, transcriptomics, and enteric pathogen challenge, the team shows that eosinophils increase in the maternal intestine during reproduction. These eosinophils enhanced goblet cell differentiation and protective mucus production, resulting in an augmented defense against pathogens. Interestingly, this intestine-specific eosinophil-driven remodeling mechanism appears to involve factors linked to eosinophils’ long-known anti-helminth activity. Finally, the authors found that this intestinal remodeling extends beyond lactation. This sets the stage for further characterization of these immune changes in long-lived mammals like humans, as human mothers also have elevated circulating eosinophils.
GeneTex’s anti-MUC2 antibody (GTX100664) was used in this study for immunofluorescence detection of MUC2-producing goblet cells in the proximal small intestine. GeneTex offers extensive catalogs of antibodies for immunology research. Please see the featured products below and visit the GeneTex website for more information.
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Reference:
(1) Nature. 2026 Jun;654(8117):209-218. doi: 10.1038/s41586-026-10531-6. Epub 2026 May 13.