Clinical Characteristics and Potential Mechanisms in Patients with Abnormal Liver Function Indices and Elevated Serum IgG4

Figure 2

(a) Abundant intrahepatic Tfh infiltration in AIH patients with elevated serum IgG4. (b) Sparse intrahepatic Tfh infiltration in AIH patients with normal IgG4 level. Tfh localization was assessed by immunostaining and fluorescence microscopy: nuclei were stained with DAPI (blue), CD4 (green), CXCR5 (red), and the DAPI, CD4, and CXCR5 images were merged.