Endothelial dysfunction in insulin resistance and type 2 diabetes

被引:169
作者
Jansson, P.-A. [1 ]
机构
[1] Univ Gothenburg, Sahlgrens Univ Hosp, Sahlgrenska Acad, Dept Mol & Clin Med Diabetes,Lundberg Lab Diabete, S-41345 Gothenburg, Sweden
关键词
capillary recruitment; endothelium; insulin signalling;
D O I
10.1111/j.1365-2796.2007.01830.x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Jansson P-A (Sahlgrenska University Hospital, Sahlgrenska, Goteborg, Sweden). Endothelial dysfunction in insulin resistance and type 2 diabetes (Review). J Intern Med 2007; 262: 173-183. Macrovascular disease is the number one killer in type 2 diabetes patients. The cluster of risk factors in the insulin resistance syndrome (IRS) partly explains this notion. Insulin action in muscle, liver or adipose tissue has been thoroughly described in the litera re, whilst this has been less described for the endothelium. Insulin stimulates nitric oxide (NO) production in the endothelium and reduced bioavailability of NO is usually defined as endothelial dysfunction. This impairment might be related to defective insulin signalling in the endothelial cell. Therefore, insulin resistance mechanisms in the endothelial cell will be emphasized in this review. Imbalance between the vasodilating agent NO and the vasoconstrictor endothelin-1 (ET-1) contributes to endothelial dysfunction. Different methods and circulating markers to assess endothelial function will be outlined. Circulating markers of an activated endothelium appear long before type 2 diabetes develops suggesting a unique role of the endothelium in the pathophysiology of the disease. Hampered blood flow in nutritive capillaries due to endothelial dysfunction is coupled with decreased glucose uptake and hyperglycemia. The forearm model combined with muscle microdialysis enables us to measure interstitial glucose and an index for capillary recruitment, the permeability surface area (PS). Available data from this method suggest that capillary recruitment in response of insulin is impaired in insulin resistant human subjects.
引用
收藏
页码:173 / 183
页数:11
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