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转化生长因子β1对巨噬细胞清道夫受体A和B(CD36)功能的影响

刘旭光1,安 君1,所 剑2,韩方雷1,崔启辰1   

  1. (1.吉林大学第一医院心脏外科,吉林 长春 130021;2. 吉林大学第一医院普外二科,吉林 长春 130021)
  • 收稿日期:2008-09-01 修回日期:1900-01-01 出版日期:2009-03-28 发布日期:2009-08-14
  • 通讯作者: 安 君

Influences of transforming growth factor-β1 on scavenger receptor class A and class B (CD36) in THP-1 derived macrophages

LIU Xu-guang1,AN Jun1,SUO Jian2,HAN Fang-lei1,CUI Qi-cheng1   

  1. (1.Department of Cardiac Surgery,First Hospital,Jilin University,Changchun 130021,China;2. Second Department of General Surgery,First Hospital,Jilin University,Changchun 130021,China)
  • Received:2008-09-01 Revised:1900-01-01 Online:2009-03-28 Published:2009-08-14
  • Contact: AN Jun

摘要: 目的:探讨转化生长因子β1(TGF-β1)对巨噬细胞清道夫受体A(ScR-A) 和B(ScR-B,CD36)的影响,为阐明动脉粥样硬化(AS)的形成(尤其形成早期)提供依据并为防治AS提供理论支持。 方法: 人类单核细胞株(THP-1)源性巨噬细胞分成对照组和实验组。实验组加3.0 mg•L-1抗 TGF-β1 抗体 (Anti TGF-β1 Ab),对照组加用3.0 mg•L-1 IgG,利用巨噬细胞摄取和Northern blotting法,同步检测对乙酰化和氧化低密度脂蛋白(LDL)摄取(结合、摄入和分解)以及ScR-A 和CD36 mRNA表达。结果:实验组125I-Ac-LDL的结合、摄入和分解量分别为(48.67±6.52)、(412.30±12.21)及(896.48±32.74) μg•g-1 protein,与对照组[(8.23±1.24)、(45.69±6.92)及(112.18±20.15) μg•g-1 protein]比较,差异均具有显著性(P<0.01);实验组125I-Ox-LDL的结合、摄入和分解量分别为(102.32±3.11)、(412.94±15.21)和(788.94±31.16) μg•g-1 protein,与对照组[(78.56±2.81)、(123.94±12.11)及(345.38±27.17) μg•g-1 protein]比较,差异均具有显著性(P<0.01)。实验组ScR-A 和CD36 mRNA的表达均较对照组增强。 实验组与对照组ScR-A mRNA比值为1.7,CD36 mRNA比值为1.12。结论: TGF-β1通过抑制ScR-A和CD36表达干预AS的形成及其发展过程,这种作用主要是通过ScR-A实现的。

关键词: 巨噬细胞, 清道夫受体, A类, CD36, 动脉粥样硬化

Abstract: Abstract:Objective To investigate the influence of transforming growth factor-β1(TGF-β1) on macrophage scavenger receptor (ScR) class A and B(ScR-B,CD36) in order to provide theoretical foundation for expounding the formation and therapy of atherosclerosis(AS).Methods THP-1 derived macrophages were divided into control group and experimental group,the cells in experimental group were treated with 3.0 mg•L-1Anti TGF-β1 Ab,the cells in control group were treated with 3.0 mg•L-1 IgG. The 125I-acetylated low density lipoprotein (125I-Ac-LDL for ScR-A)  and 125I-oxidized low density lipoprotein (125I-Ox-LDL for CD36) uptaking (including 4℃ binding,37℃ association and degradation) were measured respectively.Influence of anti TGF-β1 antibody (Anti TGF-β1 Ab) on the ScR-A and CD36 mRNA expressions in THP-1 derived macrophages was measured meanwhile,respectively. Results Compared with control group ( binding: 8.23 μg•g-1 ±1.24 μg•g-1 protein,association:45.69 μg•g-1 ±6.92 μg•g-1 protein,and degradation: 112.18 μg•g-1 ±20.15 μg•g-1 protein),Anti TGF-β1 Ab increased 125I-Ac-LDL binding(48.67 μg•g-1 ±6.52 μg•g-1 protein),association (412.30 μg•g-1±12.21 μg•g-1 protein),and degradation (896.48 μg•g-1 ±32.74 μg•g-1 protein) significantly (P<0.01);Compared with control group (binding: 78.56 μg•g-1 ±2.81 μg•g-1 protein,association: 123.94 μg•g-1 ±12.11 μg•g-1 protein,and degradation: 345.38 μg•g-1 ±27.17 μg•g-1 protein),Anti TGF-β1 Ab markedly increased 125I-Ac-LDL binding(102.32 μg•g-1 ±3.11 μg•g-1 protein),association (412.94 μg•g-1±15.21 μg•g-1 protein),and degradation (788.94 μg•g-1 ±31.16 μg•g-1 protein),respectively (P<0.01).The ScR-A and CD36 mRNA expressions of THP-1 derived macrophages were increased after treated with Anti TGF-β1 Ab compared with control group.The ratio of ScR-A mRNA of experimental group to control group was 1.7,the ratio of CD36 mRNA was 1.12.Conclusion TGF-β1 can intervene the formation and development of AS through inhibiting the expressions of ScR-A and CD36,and this depressive effect may be mainly depend on ScR-A.

Key words: macrophages, scavenger receptors, class A, CD36, atherosclerosis

中图分类号: 

  • R543.5