Figure 3.
Cell non-autonomous ST6Gal-1 influences sialylation and abundance of early transitional B cell populations. CD45.1+ whole bone marrow cells from wild-type or St6gal1-KO mice were adoptively transferred to irradiated CD45.2+ hosts. Mice were allowed to recover for 6 weeks before analysis of bone marrow and splenic B cells. (A) SNA reactivity of bone marrow and splenic B cell subsets of CD45.1+ donor cells. (B) Frequencies of CD45.1+ IM, IgM-high, BMM, IgD-/CD21-, IgD+/CD21+, MZ, and FO B cells as a fraction of total CD45.1+ B cells (n = 5). (C) Immunofluorescence microscopy staining anti-IgM (red) and anti-IgD (green) in chimeras. Splenic B cell populations indicated are identified accordingly - T1: IgM+/IgD-, extrafollicular; T2 and FO: IgM-variable/IgD+, follicular, MZ: IgM+/IgD-, marginal sinus. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001.