亲环素A对THP-1源性泡沫细胞ABCA1表达及胆固醇流出的影响及机制
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(1.邵阳学院医学院病理生理学教研室, 湖南省邵阳市 422000;2.南华大学心血管疾病研究所 动脉硬化学湖南省重点实验室南华大学医学研究中心 分子靶标湖南省协同创新中心, 湖南省衡阳市 421001)

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唐小二,硕士,讲师,研究方向为动脉粥样硬化发病机制与防治,E-mail为 tangxiaoer0417@163.com。

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国家自然科学基金项目(81570408、81370377和81470569);南华大学研究生创新课题(2016XCX04)


Effects of cyclophilin A on ABCA1 expression and cholesterol efflux in THP-1 derived macrophages and its mechanism
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1.Department of Pathophysiology, Medical College, Shaoyang University, Shaoyang, Hunan 422000, China;2.Institute of Cardiovascular Diseases, University of South China & Key Laboratory for Atherosclerology of Hunan Province & Medical Research Center, University of South China & Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, Hunan 421001, China)

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    摘要:

    目的 观察亲环素A(CypA)对THP-1源性泡沫细胞三磷酸腺苷结合盒转运体A1(ABCA1)表达和胆固醇流出的影响及机制。 方法 160 nmol/L佛波酯诱导人THP-1单核细胞分化为巨噬细胞,与50 mg/L氧化型低密度脂蛋白(ox-LDL)共孵育,使其荷脂形成泡沫细胞,常规体外培养细胞;实验分为对照组和CypA处理组;液体闪烁计数仪检测细胞胆固醇流出水平,高效液相色谱检测细胞内脂质成分,实时荧光定量PCR和Western blot检测ABCA1表达,Western blot检测核因子κB (NF-κB)核转位水平;NF-κB抑制剂小白菊内酯抑制NF-κB活化;脂质体2000转染CD147 siRNA至THP-1源性泡沫细胞。 结果 CypA显著抑制THP-1源性泡沫细胞胆固醇流出,促进NF-κB核转位,下调ABCA1表达;NF-κB抑制剂小白菊内酯拮抗CypA对ABCA1表达及胆固醇流出的抑制作用;用siRNA干扰CD147后,显著抑制CypA诱导的NF-κB核转位,上调ABCA1表达,促进胆固醇流出。 结论 CypA可能通过CD147激活NF-κB,下调ABCA1表达,抑制THP-1源性泡沫细胞胆固醇流出。

    Abstract:

    Aim To investigate the effects and mechanisms of cyclophilin A (CypA) on the expression of ATP binding cassette trasporter A1 (ABCA1) and cholesterol efflux in THP-1 derived macrophages. Methods THP-1 cells were incubated with 160 nmol/L phorbol ester to transform into macrophages. THP-1 derived macrophages were exposed to 50 mg/L oxidized low density lipoprotein (ox-LDL) and cultured with typical approaches. Liquid scintillation counter was used to determine the efficiency of cholesterol efflux. Lipids contents were tested with high performance liquid chromatogram (HPLC). Real-time PCR and Western blot were used to quantify the expression of ABCA1 and nuclear factor-κB (NF-κB) nuclear translocation. Parthenolide was used as the specific inhibitor of NF-κB. CD147 was silenced with siRNA. Results CypA significantly reduced cholesterol efflux, promoted NF-κB nuclear translocation and downregulated ABCA1 expression. NF-κB inhibitor parthenolide interfered CypA-prevented ABCA1 expression and cholesterol efflux. After CD147 were silenced with siRNA, CypA inhibited NF-κB nuclear translocation, upregulated ABCA1 expression and promoted cholesterol efflux. Conclusion CypA prevented THP-1 derived macrophages cholesterol efflux by activing NF-κB in a CD147 dependent manner and downregulating ABCA1 expression.

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唐小二,张敏,李靓,谢巍,龚朵,夏晓丹,成海鹏,赵真旺,陈凌燕,唐朝克.亲环素A对THP-1源性泡沫细胞ABCA1表达及胆固醇流出的影响及机制[J].中国动脉硬化杂志,2017,25(9):879~884.

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  • 收稿日期:2016-12-30
  • 最后修改日期:2017-04-12
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  • 在线发布日期: 2017-09-29