Journal: Liver Cancer
Article Title: Increased Expression of Programmed Death-Ligand 1 in Infiltrating Immune Cells in Hepatocellular Carcinoma Tissues after Sorafenib Treatment
doi: 10.1159/000489021
Figure Lengend Snippet: Representative patients with advanced hepatocellular carcinoma with high expression of programmed death-ligand 1 (PD-L1) in tumor-infiltrating immune cells (ICs). Consecutive slides of the patient with peritoneal metastasis (a) and the patient with lung metastasis (b) were stained with H&E, PD-L1, CD3, CD66b, CD68, and CD163, respectively. PD-L1-expressing ICs were mainly located around the tumor-invasive margins, and their distributions were highly corresponding to the staining pattern of CD68 and CD163, but not those of CD3 and CD66b. c Consecutive slides of another patient with colonic metastasis were stained with H&E and were double-stained with PD-L1 and CD68, which were shown in low- and high-power fields. A majority of the PD-L1-positive cells (brown, membranous) around the tumor margin coexpressed CD68 (green, cytoplasmic). The dashed red lines represent the area of invasive margins. The dashed black square in c indicates the area of high-power field.
Article Snippet: The slides were then incubated with primary antibodies, including anti-PD-L1 antibody clone SP142 (1: 50, Spring Bioscience, Pleasanton, CA, USA), anti-human CD3 (1: 100, clone 2GV6; Ventana, Tuscon, AZ, USA), CD66b (1: 100, clone 80H3, OriGene, Rockville, MD, USA), CD68 (1: 100, clone KP1, Ventana, Tuscon, AZ, USA), and CD163 (1: 100, clone 10D6; Thermo Fisher Scientific, CA, USA), at 4°C overnight.
Techniques: Expressing, Staining