Figure 4. RANKL-induced M-cell differentiation in Spib−/− mice.
(a) Small intestines were dissected from wild-type and Spib−/− mice after 3 days of RANKL-treatment, and subjected to immunohistochemistry. The upper three panels show the immunostaining of M-cell markers GP2, CCL9 and Marcksl1 in wild-type mice, and the lower three panels show those in Spib−/− mice. Scale bar: 50 μm. (b) Quantitative analysis of M-cell marker expression by qPCR. Data represent fold change compared to the normalized value of expression of each transcript in villous epithelial cells from untreated wild-type mice. All samples were normalized to the expression level of GAPDH. Data are representative of two independent experiments (error bars, s.d.).