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Effect of PM2.5 on cell adhesion of (A) HUVEC and (B) HMEC-1 to ECM proteins. Cells were treated with 0–800 µg/ml PM2.5 for 24 h, then the absorbance of ECM proteins was determined. *P<0.05 vs. control group. PM2.5, particulate matter with a diameter of ≤2.5 µm; HUVEC, human umbilical vein endothelial cell; HMEC, human microvascular endothelial cell; ECM, extracellular matrix; Group 1, control.
