Journal: Microbiology Spectrum
Article Title: A novel chronic hepatitis B mouse model with immune activation and liver fibrosis
doi: 10.1128/spectrum.02513-24
Figure Lengend Snippet: Progressed liver inflammation, injury, and fibrosis caused by injections of PS in pAAV-HBV 1.2 BALB/c mice. Levels of collagen deposition were appraised by ( A, B ) Sirius red (SR) staining for liver sections, and by ( C ) the quantification of hepatic hydroxyproline (Hyp, n = 6); for the representative images of SR staining, 200×, scale bar = 100 µm; the top-right corner, 100×; scale bar = 200 µm. Hepatic α-SMA protein levels were analyzed by ( D, E ) IHC ( n = 4) and by ( F, G ) WB ( n = 3); for the representative IHC micrographs, the upper panels, 100×; scale bar = 200 µm; the lower panels, 200×; scale bar = 100 µm. The pathological changes in the liver were observed through ( H ) H&E staining (12 wpi), and ( I ) the liver inflammation grades and ( J ) the fibrosis stages were, respectively, assessed by the Scheuer system and Ishak scoring system, respectively. For the representative images of H&E staining, portal area: the upper panels, 100×; scale bar = 200 µm; the lower panels, 200×; scale bar = 100 µm; interstitium: 50×; scale bar = 400 µm. All data are presented as mean ± SEM. * P < 0.05, ** P < 0.01.
Article Snippet: Liver sections (3 μm) were incubated in 3% hydrogen peroxide for 30 min followed by a PBS wash. Then, the sections were blocked with 3% fetal bovine serum at room temperature following heat-mediated antigen retrieval and incubated successively with primary antibodies against α-SMA rabbit polyclonal antibody (1:800; Proteintech Group, Inc., Wuhan, China), HBcAg (1:50; Gene Tech [Shanghai] Company Limited), or PD-L1 (1:100; HUABIO, Huaan Biotechnology Co., Ltd., Hangzhou, China), at 4°C overnight, and secondary antibody (1:300; Thermo Fisher Scientific [China] Co., Ltd.) at 37°C for 45 min, and then treated with a diaminobenzidine chromogenic substrate, counterstained with hematoxylin, sealed, and scanned with an Aperio Versa scanner (Leica, Germany).
Techniques: Staining