中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (51): 8269-8274.doi: 10.3969/j.issn.2095-4344.2014.51.013

• 组织构建与生物活性因子 tissue construction and bioactive factors • 上一篇    下一篇

Kruppel样因子6基因对巨噬细胞中胆固醇蓄积的影响

王慧清,张宗棨,黄文红,王晓菲,朱 燕   

  1. 上海交通大学医学院附属第三人民医院心电图室,上海市 201999
  • 出版日期:2014-12-10 发布日期:2014-12-10
  • 通讯作者: 朱燕,主治医师,上海交通大学医学院附属第三人民医院心内科,上海市 201999
  • 作者简介:王慧清,女,1982年生,江苏省江阴市人,汉族,2006年徐州医学院毕业,医师,主要从事心脏电生理方面的研究。
  • 基金资助:

    国家青年科学基金项目(81200206);上海市卫生局课题(2010073)

Effect of Kruppel-like factor 6 overexpression on cholesterol accumulation in macrophages

Wang Hui-qing, Zhang Zong-qi, Huang Wen-hong, Wang Xiao-fei, Zhu Yan   

  1. Department of Electrocardiogram, No. 3 People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 201999, China
  • Online:2014-12-10 Published:2014-12-10
  • Contact: Zhu Yan, Attending physician, Department of Electrocardiogram, No. 3 People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 201999, China
  • About author:Wang Hui-qing, Physician, Department of Electrocardiogram, No. 3 People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 201999, China
  • Supported by:

    the National Science Fund for Distinguished Young Scholars, No. 81200206; the Project of Shanghai Health Bureau, No. 2010073

摘要:

背景:研究表明,Kruppel样因子6与巨噬细胞极化密切相关。但是,关于Kruppel样因子6在巨噬泡沫细胞形成中的作用尚不清楚。

 

目的:观察Kruppel样因子6过表达对氧化低密度脂蛋白刺激下的小鼠巨噬细胞(RAW264.7)胆固醇蓄积及对ATP结合盒转运蛋白A1表达的影响。

 

方法:取Raw264.7巨噬细胞株分别转染慢病毒空载体和重组载体pCDH-KLF6,作为对照组和Kruppel样因子6组,另取稳定感染慢病毒空载体的Raw264.7巨噬细胞株和稳定感染重组载体pCDH-KLF6的Raw264.7巨噬细胞株均加入50 mg/L氧化低密度脂蛋白共孵育48 h后,得到氧化低密度脂蛋白组和Kruppel样因子6+氧化低密度脂蛋白组。

 

结果与结论:与对照组相比,氧化低密度脂蛋白组巨噬细胞内总胆固醇和胆固醇酯表达水平显著增加    (P <0.05)。与氧化低密度脂蛋白组巨噬细胞相比,Kruppel样因子6+氧化低密度脂蛋白组细胞内总胆固醇和胆固醇酯表达水平明显下降,胆固醇酯/总胆固醇明显降低(P <0.05)。而未加入氧化低密度脂蛋白处理的2组细胞内脂质表达水平少,且对照组与Kruppel样因子6组相比,细胞内脂质表达水平差异无显著性意义。提示Kruppel样因子6可能通过促进ATP结合盒转运蛋白A1的表达,抑制氧化低密度脂蛋白诱导的RAW264.7巨噬细胞胆固醇蓄积。

 


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 组织工程, 巨噬泡沫细胞, Raw 264.7细胞, Kruppel样因子6, ATP结合盒转运体A1, 氧化低密度脂蛋白, 动脉粥样硬化, 国家自然科学基金

Abstract:

BACKGROUND: Recent studies have shown that Kruppel-like factor 6 (KLF6) gene is closely related to macrophage polarization. However, the role of KLF6 in the formation of macrophage foam cells is completely unknown.

OBJECTIVE: To investigate the effect of KLF6 gene on oxidized low density lipoprotein (ox-LDL)-induced cholesterol accumulation and expression of ATP binding cassette transporter A1 in RAW264.7 macrophages.
METHODS: RAW264.7 cell lines were transfected with lentiviral empty vector and recombinant vector carrying pCDH-KLF6, respectively, which acted as control group and KLF6 gene group. RAW264.7 cell lines stably transfected with lentiviral empty vector and recombinant vector carrying pCDH-KLF6 were cultured in 50 mg/L ox-LDL for 48 hours to establish ox-LDL group and ox-LDL+KLF6 group, respectively.
RESULTS AND CONCLUSION: The contents of total cholesterol and cholesterol ester in the ox-LDL group were significantly higher than those in the control group (P < 0.05) and the ox-LDL+KLF6 group (P < 0.05). In addition, the ratio of cholesterol ester to total cholesterol in the ox-LDL group was also lower in the ox-LDL+KLF6 group than the ox-LDL group (P < 0.05). However, the intracellular lipid level was lower in the control and KLF6 groups than in the two ox-LDL groups, and there was no difference between the control and KLF6 groups. These findings indicate that KLF6 can upregulate the expression of ATP binding cassette transporter A1 and inhibit the cholesterol accumulation induced by ox-LDL in RAW 264.7 macrophages.


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: lipoproteins, LDL, cholesterol, macrophages, Kruppel-like transcription factors

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