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Our study underscores the crucial role of the gut microbiota, particularly neomycin-depleted butyrate producing taxa, in regulating PP-Tfh cell function and IgA production. Butyrate emerges as a metabolite linking microbial metabolism to Tfh differentiation and IgA class switching. Together, these findings establish a microbiota-metabolite-Tfh cell axis essential for mucosal immune homeostasis and suggest novel strategies for enhancing vaccine efficacy and protection against enteric infections. Video Abstract.
Ko et al. (Wed,) studied this question.
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