机构地区:[1]南京军区福州总医院内分泌科,福州350025
出 处:《中华内科杂志》2012年第6期460-465,共6页Chinese Journal of Internal Medicine
基 金:福建省自然科学基金(2008J0104)
摘 要:目的 探讨槲皮素对2型糖尿病大鼠肾脏损害的保护作用及其机制。方法 清洁级SD雄性大鼠采用高糖高脂饲料喂养及腹腔注射小剂量链脲佐菌素建立2型糖尿病大鼠模型,72h后断尾法采血检测血糖≥16.7mmol/L视为模型用鼠。成模大鼠按数字表法随机分组,其中糖尿病模型组(DM组)9只,槲皮素治疗组(QuE组)9只,另设正常对照组(NC组)8只。8周处死大鼠,检测空腹血糖(FPG)、空腹胰岛素(FIns)、血肌酐(SCr)、尿素氮(BUN)、TG、TC、LDL-c、24h尿蛋白(24hUP)、肾脏肥大指数(KI)。过碘酸六胺银染色观察肾脏病理改变,免疫组化方法检测肾脏组织中泛素、NF-kBp65蛋白表达,并分析其与蛋白尿发生的相关性。结果 DM组和QuE组FPG[(25.45±1.23)mmol/L和(19.99±1.20)mmol/L]、Fins[(25.67±2.58)mU/L和(19.29±1.80)mU/L]、SCr[(44.00±2.53)umol/L和(34.43±2.23)umol/L]、BUN[(11.60±0.39)mmol/L和(8.20±0.37)mmol/L]、TG[(3.32±0.22)mmol/L和(2.43±0.25)mmol/L]、TC[(2.95±0.21)mmol/L和(2.24±0.17)mmol/L]、LDL.C[(2.03±0.22)mmol/L和(1.49±0.13)mmol/L]及24h UP[(46.67±2.50)mg/24h和(25.57±2.82)mg/24h]及KI[(9.76±0.30)X10’和(8.44±0.26)X10^3]均显著高于NC组[(6.56±0.41)mmol/L、(12.63±1.41)mU/L、(22.88±2.36)umol/L、(5.45±0.51)mmol/L、(1.64±0.11)mmol/L、(1.33±0.17)mmol/L、(0.46±0.05)mmol/L、(12.38±1.19)/24h和(6.78±0.12)X10^3];而QUV.组上述指标均明显低于DM组,P值均〈0.05。DM组大鼠肾脏组织主要表现为肾小球基底膜不规则增厚,系膜细胞增生及系膜基质增多等病理改变,且肾小球泛素、NF-kBp65蛋白的表达均上调(P〈0.01),并与蛋白尿发生呈正相关�Objective To investigate the protective effect of quercetin on diabetic nephropathy and to explore its possible mechanism. Methods Type 2 diabetes mellitus rat model was established by feeding high-carbonhydrate-fat diet and injecting with streptozotoein. At 72 hour after injection, blood samples were collected from the tail veins of all rats. Those rats with blood glucose level ≥ 16. 7 mmol/L were considered as the diabetes model been successfully established. The model rats were randomly divided into type 2 diabetic group (group DM, n = 9) and quercetin group (group QUE, n = 9). Other rats were used as normal controls ( group NC, n = 8 ). All rats were performed by intragastrie administration for 8 weeks. At the end of experiment, the rats were sacrificed and fasting plasma glucose ( FPG), fasting insulin ( Fins), serum creatinine (SCr) , blood urea nitrogen(BUN) , TG, TC, LDL-C, 24 h urine protein (24 h UP) , andkidney index (KI) were evaluated. Pathological changes of kidney were observed by periodic acid-silver metheramine( PASM ). The expressions of ubiquitin and NF-KB p65 on glomeruli were examined by immunohistochemical method, and its association with the incidence of proteinuria was analyzed. Results In groups DM and QUE, the level of FPG [ ( 25.45 ±1.23 ) mmol/L and ( 19. 99 ± 1.20) mmol/L ] , Fins [ (25.67 ± 2. 58 )mU/L and ( 19. 29 ± 1.80 )mU/L ], SCr [ (44. 00 ± 2. 53 ) panol/L and (34. 43 ± 2. 23 ) umol/L ], BUN [ ( 11.60 ± O. 39 ) mmol/L and ( 8.20 ± O. 37 ) mmol/L ], TG [ ( 3.32 ± O. 22 ) mmoL/L and (2.43±0.25)mmol/L],TC[(2.95 ±0.21) mmol/L and (2.24±0.17)mmol/L], LDL-C[(2.03 ± 0.22)mmol/L and (1.49±0. 13)mmol/L], 24 h UP[ (46.67 ±2.50) mg/24 h and (25.57 ±2.82) mg/24 h]and KI[ (9. 76 ± 0. 30) × 103 and (8. 44 ± 0. 26) ×10^3 ] were significantly increased than the indexes of group NC [ (6. 56 ± 0. 41 ) mmoL/L, ( 12. 63 ± 1.41 ) mU/L, (22. 88 ± 2. 36)
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