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Fig. 4 | Stem Cell Research & Therapy

Fig. 4

From: Transplantation of adipose-derived mesenchymal stem cells attenuates pulmonary fibrosis of silicosis via anti-inflammatory and anti-apoptosis effects in rats

Fig. 4

Masson staining of lung tissue in each group. A ×100; B ×400. (a1, b1) Control group, normal lung morphology: almost no deposition of collagen in lung parenchyma. (a2, b2) Exposure group, distorted lung morphologies: collagen fiber agglomerates, initial formation of silicon nodules and dense accumulation of collagen. (a3, b3) Vehicle group, similar to exposure group. (a4, b4) Treatment group, ameliorative lung morphology: lung sections showing reduced collagen deposition, less alveolar thickening and reduced amounts of collagen. Arrows point out pathological changes of lung tissue

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