Fig. 5.
Lack of ERα causes an accumulation of plasma B cells in the kidney and spleen. (A) Severe infiltration of B lymphocytes in kidneys from ERα-/- mice (hematoxylin/eosin-stained). Some of these lymphocytes are characterized as a plasma B cells with bigger cytosolic areas (A) and cytosolic IgG signals (anti-IgG positive, B). Increased numbers of plasma B cells bearing cytosolic IgG are found in spleens from ERα-/- mice (D) but not in WT mice (C). Plasma B cells also accumulate in lymph nodes from ERα-/- mice (E). Arrowheads point to plasma B cells.