Hyperglycemia promotes myelopoiesis and impairs the resolution of atherosclerosis.

Hyperglycemia promotes myelopoiesis and impairs the resolution of atherosclerosis.
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DOI:
10.1016/j.cmet.2013.04.001
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发表时间:
2013-05-07
期刊:
影响因子:
29
通讯作者:
Goldberg IJ
Goldberg IJ
中科院分区:
生物学1区
文献类型:
--
作者:
Nagareddy PR;Murphy AJ;Stirzaker RA;Hu Y;Yu S;Miller RG;Ramkhelawon B;Distel E;Westerterp M;Huang LS;Schmidt AM;Orchard TJ;Fisher EA;Tall AR;Goldberg IJ

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糖尿病是动脉粥样硬化的主要危险因素。尽管动脉粥样硬化是由动脉壁中富含胆固醇的脂蛋白沉积引起的,但炎性白细胞进入病变会加速疾病的进展并损害分辨率。我们发现,糖尿病小鼠循环中的中性粒细胞和Ly6-CHI单核细胞数量增加,反映了高血糖诱导的骨髓髓系祖细胞的增殖和扩张,以及单核细胞释放到循环中。通过与普通髓系祖细胞上的晚期糖基化终产物受体相互作用,S100A8/A9的中性粒细胞产量增加,导致骨髓生成增强。治疗高血糖可减少单核细胞增多,减少单核细胞进入动脉粥样硬化病变,并促进病情消退。在I型糖尿病患者中,血浆S100A8/A9水平与白细胞计数和冠状动脉病变相关。因此,高血糖促进了骨髓生成,从而促进了糖尿病患者的动脉粥样硬化。
Diabetes is a major risk factor for atherosclerosis. Although atherosclerosis is initiated by deposition of cholesterol-rich lipoproteins in the artery wall, the entry of inflammatory leukocytes into lesions fuels disease progression and impairs resolution. We show that diabetic mice have increased numbers of circulating neutrophils and Ly6-Chi monocytes, reflecting hyperglycemia-induced proliferation and expansion of bone marrow myeloid progenitors and release of monocytes into the circulation. Increased neutrophil production of S100A8/A9, via an interaction with the receptor for advanced glycation end products on common myeloid progenitor cells, leads to enhanced myelopoiesis. Treatment of hyperglycemia reduces monocytosis, entry of monocytes into atherosclerotic lesions and promotes regression. In patients with type I diabetes plasma S100A8/A9 levels correlate with leukocyte counts and coronary artery disease. Thus, hyperglycemia drives myelopoiesis and thus promotes atherogenesis in diabetes.
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