Purpose To investigate effect of valsartan on expression of Notch pathway and production of extracellular matrix. Methods Urine protein and production of extracellular matrix were measured after diabetic mice were treated with valsartan. The levels of Jag-ged1, Notch1, Notch intracellular domain 1 (NICD1), transforming growth factor-β1 (TGF-β1), TypeⅣcollagen and Laminin were determinated by immunohistochemistry, Western blot and real-time PCR. Results Valsartan suppressed urine protein and production of extracellular matrix in diabetic mice (P<0. 05). Valsartan also inhibits overexpression of Jagged1, Notch1, NICD1, TGF-β1, Type Ⅳ collagen and Laminin in glomerular tissues of diabetic mice (P<0. 05 or P<0. 01). Conclusion Valsartan inhibits activa-tion of Notch pathway in glomerular tissues of diabetic mice, inhibits production of extracellular matrix in glomerulus and delays glomer-ulosclerosis.%目的：探讨缬沙坦对糖尿病小鼠肾小球组织中Notch信号通路表达及细胞外基质生成的影响。方法建立糖尿病小鼠模型,观察给予缬沙坦治疗后小鼠尿蛋白及肾小球内细胞外基质生成情况,采用免疫组化、Western blot和实时定量PCR技术检测Jagged1、Notch1、Notch胞内域1(Notch intracellular domain 1, NICD1)及其转化生长因子β1(transforming growth factor-β1, TGF-β1)、Ⅳ型胶原(Type Ⅳ collagen)、层粘连蛋白(Laminin)的表达。结果缬沙坦可降低糖尿病小鼠尿蛋白和细胞外基质的生成(P<0．05),减少糖尿病小鼠肾小球组织中Jagged1、Notch1、NICD1、TGF-β1、Type Ⅳ collagen、Laminin的过表达(P<0．05或P<0．01)。结论缬沙坦可通过抑制糖尿病小鼠肾小球组织中Notch信号通路的表达,减少细胞外基质生成,防止肾小球硬化。
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