Abstract:The inability of neonates to develop CD4+CXCR5+PD-1+ T follicular helper (TFH) cells contributes to their weak vaccine responses. In adult mice, IL-6 promotes TFH-cell expansion by suppressing the expression of IL-2Rβ on TFH cells. Here, we found a totally opposite role for IL-6 in neonatal mice TFH response. Whereas co-injection of neonatal mice with IL-6 and a conjugate polysaccharide vaccine suppressed TFH response by increasing the production of IL-2 and expression of IL-2Rα and IL-2Rβ on TFH cells, immuni… Show more
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