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Histological examination of lung tissue and antimetastatic rate in different groups. Mice with transplantation tumor were treated with (a) NS, (b) DDP, GBEE (c) 200mg/kg, (d) 100 mg/kg, and (e) 50 mg/kg. After giving corresponding drugs for 17 days, HE staining analysis was carried out. The nucleus of cancer cells in metastasis foci was dyed blue and the cytoplasm was dyed red (100×).
