单核细胞与内皮细胞的相互作用对单核细胞CD36表达的影响

Effects of monocyte-endothelium interaction on the expression of CD36 in monocytes

目的:研究单核细胞、内皮细胞的相互作用对单核细胞清道夫受体CD36抗原表达的影响并在此基础上观察细胞因子在其中的介导作用。方法:使用单核细胞、内皮细胞单独培养及混合培养的方法形成不同的培养条件,通过ABC-ELISA法检测培养液中巨噬细胞集落刺激因子(M-CSF)的含量,使用流式细胞术检测单核细胞表面CD36抗原的表达程度。结果:单核细胞单独培养条件下CD36的表达量较低,在和内皮细胞混合培养后CD36表达量显著升高(P<0.05),M-CSF和血小板源性生长因子(PDGF-BB)在单核细胞CD36表达增高的调节中起着一定的介导作用,但不占主要地位。结论:单核细胞与内皮细胞的相互作用可通过多种环节上调单核细胞CD36的表达,从而参与动脉粥样硬化的发展。

AIM: To examine the effects of monocyte-endothelium interaction on the expression of CD36 in monocytes and observe the functions of cytokines in this process. METHODS: The monocytes and endothelial cells were cultured alone or cocultured together to form different cell culture conditions. The level of M-CSF in culture medium was determined by enzyme linked immune sandwich assay(ELISA) technique, and the expression of CD36 in monocytes was determined by flow cytometry. RESULTS: The expression of CD36 in monocytes was low in monocytes cultured alone but increased significantly when monocytes and endothelial cells were cocultured(P<0.05). M-CSF and PDGF-BB played certain roles in increasing expression of CD36 in monocytes, but they didn't seize the principal positions. CONCLUSION: The monocyte-endothelium interaction increased the expression of CD36 in monocytes through various mechanisms and may participate in the pathogenesis of atherosclerosis.