Fig. 6From: Transplantation of adipose-derived mesenchymal stem cells attenuates pulmonary fibrosis of silicosis via anti-inflammatory and anti-apoptosis effects in ratsCellular apoptosis of lung tissue in each group (TUNEL staining). a ×400: (a1) control group; (a2) exposure group; (a3) vehicle group; (a4) treatment group. b Apoptosis index of each group. ap < 0.05 vs control group; bp < 0.05 vs exposure groupBack to article page