求翻译：经皮冠状动脉介入治疗是目前冠心病治疗的有效手段，药物涂层支架的出现明显降低了术后再狭窄，我们试探寻找新的药物，探讨用于药物涂层支架的可行性。紫杉醇是一种微管抑制剂，在不同浓度时，对内皮细胞和平滑肌细胞均有抑制作用；ATRA（全反式维甲酸）能够保护血管内皮，加快内皮功能的恢复，减少内皮损伤后的内膜增厚[1]。设想一定浓度的紫杉醇和全反式维甲酸以合适的比例合用，既发挥抑制血管平滑肌细胞迁移、增生和分泌，又保护血管内皮细胞，减少新生内膜生成。是什么意思？

Percutaneous coronary intervention is the effective means of treatment of coronary heart disease, drug-coated stent Restenosis after significantly reduces the appearance of, we test for new drugs, exploring the feasibility of drug-eluting stents. Paclitaxel is a microtubule inhibitor in different concentrations, have an inhibitory effect on endothelial cells and smooth muscle cells; ATRA (all-TRANS Retinoic acid) to vascular endothelial protection, speed recovery of endothelial function, reduces intimal thickening of endothelial injury [1]. Envisage certain concentrations of paclitaxel combination of all-TRANS Retinoic acid to an appropriate proportion, playing both inhibition of vascular smooth muscle cell migration, proliferation and secretion, and protection of vascular endothelial cells, reduces neointima generated.