Protective effect of Radix Astragali injection on immune organs of rats with obstructive jaundice and its mechanism

Figure 1 Pathological changes in spleen of model control group (A) and treatment group (B). A1: 21 d. Spleen (++) (Bax, × 200); A2: 28 d. Thickening of the wall of small spleen arteries as well as expansion and congestion of the red pulp (HE, × 200); A3: 28 d. Enlargement of spleen sinusoid, hyperplasia of cells in the spleen sinus as well as inflammatory cell infiltration and hemorrhage (HE, × 200); A4: 28 d. Enlargement of spleen sinusoid and hyperplasia of fibrous tissue (HE, × 100); B1: 21 d. Spleen (+) (Bax, × 200); B2: 28 d. Focal necrosis in spleen lymphoid follicles (HE, × 100).