选择素是内皮细胞表达的粘附分子选择素家族的一员，介导白细胞与内皮细胞粘附，可以在动脉粥样硬化病变中发现其表达。
P-selectin is one of the selectin family members, which can result in the adhesion between leucocytes and endothelial cells. It has been detected in atherosclerosis plaques.
结论PPD可以直接刺激EC表达粘附分子，进一步参与介导白细胞与内皮细胞的粘附。
Conclusion PPD could directly increase the expression of adhesion molecules which involved adhesion of PBMC to HUVEC.
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