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目的：观察络治法对链佐脲菌素（STZ）诱导的糖尿病大鼠视网膜毛细血管消化铺片中血管细胞黏附分子-1（VCAM-1）表达的影响，探讨络治法对糖尿病视网膜病变微血管损伤的保护作用及机制。方法将60只雌性Wistar大鼠随机分成空白组、模型组、对照组及络治组。除空白组不做处理外，其余各组均制作糖尿病大鼠模型并按方案给药。给药24周后每组大鼠取双侧眼球做视网膜血管消化铺片，右眼PAS染色做形态学观察，左眼免疫荧光染色法测定VCAM-1在血管壁中的表达。结果 PAS染色结果显示，络治组糖尿病大鼠视网膜毛细血管在管径粗细、局部扩张程度、扭曲聚集程度等方面较对照组及模型组有明显改善，且络治组大鼠毛细血管管壁周细胞的丢失明显减少，组间比较有统计学差异（P＜0．05）。免疫荧光染色显示，络治组视网膜血管壁中VCAM-1呈较少的表达，组间比较有统计学差异（P＜0．05）。结论络治法能够抑制VCAM-1在糖尿病视网膜毛细血管壁中的表达，有效减轻高血糖引起的视网膜微血管损伤，改善糖尿病视网膜微血管的结构与机能。“,”Objective To observe the expression of vascular cell adhesion molecule-1 (VCAM-1 )in the retinal digest preparations of streptozotocin (STZ)-induced diabetic rats treated with collaterals therapy,and to investigate the protec-tive effects and mechanism of collaterals therapy on diabetic retinopathy microvascular injury.Methods Sixty female Wistar rats were randomly divided into 4 groups including blank group,model group,control group and collaterals ther-apy group.All except the blank group rats were made into models of diabetic rats and treated according to the scheme. After 24 weeks each rats bilateral eyes were made into retinal vascular digest preparations.The right eye was treated by PAS staining for morphological observation and the left eye by immunofluorescence staining for determining the VCAM-1 expression in the vessel wall.Results PAS staining showed that collaterals therapy group had obvious improvement on morphological changes such as vessel diameter,local expansion,vascular twist and so on. However,retinal pericyte damage of collaterals therapy group was significantly suppressed (P<0.05).Immunofluorescence staining showed that VCAM-1 in collaterals therapy group had less expression than in the other groups (P<0.05).Conclusion Collaterals therapy can inhibit the expression of VCAM-1 in diabetic retinal capillary wall,effectively alleviate retinal microvascular damage caused by hyperglycemia,and improve diabetic retinal microvascular structure and function.