目的 探索α-突触核蛋白（α-Syn）干预对人单核细胞白血病细胞系（THP-1）巨噬细胞源性泡沫细胞的影响。方法 通过佛波酯（PMA）和氧化型低密度脂蛋白（ox-LDL）构建THP-1巨噬细胞源性泡沫细胞模型,使用不同浓度（33、66、100、133 nmol/L）α-Syn处理泡沫细胞,随后检测细胞胆固醇含量和炎症因子白细胞介素-1β（IL-1β）、白细胞介素-6（IL-6）及白细胞介素-8（IL-8）的mRNA表达以及核因子κB（NF-κB）和凝集素样氧化低密度脂蛋白受体-1（LOX-1）的蛋白表达变化。结果 高剂量（100和133 nmol/L）α-Syn处理可以减少THP-1巨噬细胞源性泡沫细胞内胆固醇的含量（P<0.05）,并且减少IL-1β、IL-6和IL-8的mRNA表达（P<0.05）。进一步发现（100 nmol/L和133 nmol/L）α-Syn可以降低THP-1巨噬细胞源性泡沫细胞p-NF-κB和LOX-1的蛋白表达（P<0.05）。结论 α-Syn可以降低THP-1源性巨噬细胞泡沫细胞胆固醇蓄积和炎症反应,可能是通过下调p-NF-κB和LOX-1蛋白表达。

      Objective To explore the effects of α-synuclein（α-Syn）intervention on human monocytic leukemia cell（THP-1）macrophage-derived foam cells．Methods The THP-1 macrophage-derived foam cell model was constructed by phorbol 12-myristate 13-acetate（PMA）and oxidized low-density lipoprotein（ox-LDL）．Foam cells were treated with different concentrations（33, 66, 100, and 133 nmol/L）of α-Syn, and the cellular cholesterol contents, as well as the mRNA expression of IL-1β、IL-6 and IL-8 were detected．Subsequently,alternation in protein expression of NF-κB and LOX-1 was measured．Results High-dose（100 and 133nmol/L）α-Syn treatment significantly reduced the levels of intracellular cholesterol in THP-1-derived macrophage foam cells（P<0.05）and decreased the mRNA expression of IL-1β、IL-6 and IL-8（P<0.05）．It was further found that（100 nmol/L and 133 nmol/L）α-Syn decreased the protein expression of p-NF-κB and LOX-1 in THP-1 macrophage-derived foam cells（P<0.05）．Conclusions The results of the present study suggest that α-Syn reduces cholesterol accumulation and inflammatory response in THP-1-derived macrophage foam cells, possibly by down-regulating p-NF-κB and LOX-1 protein expression．