Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, China.
Department of Pathology, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, China.
Biomed Pharmacother. 2018 Jan;97:1020-1031. doi: 10.1016/j.biopha.2017.11.041. Epub 2017 Nov 8.
Among the various complications of type 2 diabetes mellitus, atherosclerosis causes the highest disability and morbidity. A multitude of macrophage-derived foam cells are retained in atherosclerotic plaques resulting not only from recruitment of monocytes into lesions but also from a reduced rate of macrophage migration from lesions. Nε-carboxymethyl-Lysine (CML), an advanced glycation end product, is responsible for most complications of diabetes. This study was designed to investigate the mechanism of CML/CD36 accelerating atherosclerotic progression via inhibiting foam cell migration. In vivo study and in vitro study were performed. For the in vivo investigation, CML/CD36 accelerated atherosclerotic progression via promoting the accumulation of macrophage-derived foam cells in aorta and inhibited macrophage-derived foam cells in aorta migrating to the para-aorta lymph node of diabetic apoE mice. For the in vitro investigation, CML/CD36 inhibited RAW264.7-derived foam cell migration through NOX-derived ROS, FAK phosphorylation, Arp2/3 complex activation and F-actin polymerization. Thus, we concluded that CML/CD36 inhibited foam cells of plaque migrating to para-aorta lymph nodes, accelerating atherosclerotic progression. The corresponding mechanism may be via free cholesterol, ROS generation, p-FAK, Arp2/3, F-actin polymerization.
在 2 型糖尿病的各种并发症中,动脉粥样硬化导致的残疾和发病率最高。动脉粥样硬化斑块中存在大量巨噬细胞衍生的泡沫细胞,这不仅是由于单核细胞募集到病变部位,而且还由于巨噬细胞从病变部位迁移的速度降低。Nε-羧甲基赖氨酸(CML),一种晚期糖基化终产物,是糖尿病大多数并发症的罪魁祸首。本研究旨在探讨 CML/CD36 通过抑制泡沫细胞迁移加速动脉粥样硬化进展的机制。进行了体内研究和体外研究。在体内研究中,CML/CD36 通过促进糖尿病 apoE 小鼠主动脉中巨噬细胞衍生的泡沫细胞的积累并抑制主动脉中巨噬细胞衍生的泡沫细胞迁移到主动脉旁淋巴结来加速动脉粥样硬化的进展。在体外研究中,CML/CD36 通过 NOX 衍生的 ROS、FAK 磷酸化、Arp2/3 复合物激活和 F-肌动蛋白聚合来抑制 RAW264.7 衍生的泡沫细胞迁移。因此,我们得出结论,CML/CD36 通过游离胆固醇、ROS 生成、p-FAK、Arp2/3、F-肌动蛋白聚合来抑制斑块中的泡沫细胞迁移到主动脉旁淋巴结,从而加速动脉粥样硬化的进展。相应的机制可能是通过游离胆固醇、ROS 生成、p-FAK、Arp2/3、F-肌动蛋白聚合。