asbestos dust
4.Results Proliferation of lung fibroblast and synthesis of collagen could be enhanced by the supernatant containing AM induced by quartz, asbestos and uranium mineral dust, with 3H TdR incorporated counts per minute (cpm) of 6 584, 3 848 and 6 893 in the group of 100 μg 3H TdR and 14 C Pro incorporated 27 952, 13 416 and 18 538 in the group of 200 μg respectively, which were significantly higher than those in the control group.

