Regulatory T Cells Protect Fine Particulate Matter-Induced Inflammatory Responses in Human Umbilical Vein Endothelial Cells

Figure 6

Tregs decrease the adhesion of THP-1 cells to endothelial cells. (a) Representative photomicrograph of THP-1 cells adhering to endothelial cells (ECs). THP-1 cells were identified by green fluorescence. Scalebar=100 nm. (b) The adhesion of THP-1 cells to ECs was determined by fluorescence microscopy. Data are expressed as means ± SEM. ∗ indicates no T, CD4⁺CD25⁻, or CD4⁺CD25⁺ versus control; # indicates no T or CD4⁺CD25⁻ versus CD4⁺CD25⁺. ^∗𝑃<0.05, ^∗∗𝑃<0.01, and ^##𝑃<0.01. Experiments were repeated 4 times.

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