1,25-二羟维生素D3对糖尿病肾病大鼠维生素D受体及肾脏纤维化的影响  被引量:4

Positive impact of 1,25-dihydroxy vitamin D3 on vitamin D receptor and renal fibrosis in diabetic nephropathy rats

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作  者:张园园[1] 俞瑞[1] 田燕燕[1] 杨烨[1] 吕国栋[2] 朱佳[1] 肖拉提[1] 朱筠[1] 

机构地区:[1]新疆医科大学第一附属医院内分泌科,乌鲁木齐830054 [2]新疆医科大学临床研究院

出  处:《中华糖尿病杂志》2015年第2期105-109,共5页CHINESE JOURNAL OF DIABETES MELLITUS

基  金:国家自然科学基金(81160116)

摘  要:目的探讨1,25-二羟维生素D3(活性VitD3)对VitD受体(VDR)及糖尿病肾病(DN)纤维化的作用及机制。方法清洁级健康雄性SD大鼠,成功建立DN大鼠模型24只,分4组。给予大鼠肾脏注射不同类型转化生长因子β1(TGF-β1)慢病毒,使TGF-β1表达不同水平:(1)高表达花生油组(A组);(2)空病毒花生油组(B组);(3)高表达VitD组(D组);(4)空病毒VitD组(E组);正常大鼠作为正常对照组(C组)。分别予VitD或花生油(对照)灌胃37d后取肾脏。电镜观察肾脏形态变化,MASSON染色观察肾脏纤维化程度,免疫组化、rt-PCR、Western blotting检测TGF-β1、VitD受体(VDR)、单核细胞趋化因子-1(MCP-1)、胶原蛋白.1(Col-1)mRNA和蛋白表达量。多组间比较采用方差分析。两组间比较采用t检验结果(1)A、B组TGF-β1表达高于其余3组。(2)A、B组MCP-1、Col-1mRNA和蛋白表达均高于E组(均P〈0.05)。VDRmRNA和蛋白表达水平在A组(0.65±0.44、2.01±0.70),B组(1.17±0.59、3.19±1.01)均低于C组(3.93±1.17、5.38±0.48;F=19.28、19.11,均P〈0.01)。(3)活性VitD干预后,D组及E组的TGF-β1、MCP-1、Col-1mRNA和蛋白表达分别低于A组及B组(均P〈0.05),VDRmRNA及蛋白表达水平增加(t=5.61、2.95;t=5.42、3.33,均P〈0.05)。(4)在电镜中,VitD干预后肾脏纤维化程度减轻;在免疫组化中VitD干预后TGF-β1、MCP-1、Col-1表达减少,VDR表达增加。结论活性VitD,可能通过上调VDR,下调纤维化因子TGF—β1、MCP-1、Col-1的表达,起到防止纤维化发生的作用;在不同TGF-β1表达状态下,活性VitD,仍能通过调节上述因子发挥肾脏保护作用。Objective To determine the role and possible mechanisms of 1,25-dihydroxy vitamin D3 and vitamin D receptor(VDR)in anti-fibrosis of diabetic nephropathy(DN). Methods DN rats(n=24) were randomly divided into 4 groups as blow: (1)over-expression with arachis oil group (group A, n=6);(2) over-expression with vitamin D group (group D, n=6);( 3 )virus vector with arachis oil group (group B,n=6); (4) virus vector with vitamin D group (group E, n=6). Six normal rats was resigned as control group with araehis oil (group C, n=6). DN rats were injected different lentivirus with transforming growth factor beta 1 (TGF-β1) to establish the model. After a 37 days gavage of 1,25-dihydroxy vitamin D3 or arachis oil, the kidney was taken out as samples. The structure and morphology change in kidney tissues was observed by electron microscope and Masson staining;the expressions of mRNA and protein of TGF-[3~, VDR, moynocte chemoattractant protein-1 (MCP-1), collagen-1 (Col-l) in kidney tissues were measured by immunohistochemistry, Western blotting and real-time PCR. Variance analysis was used to compare among muhigroups, and t test was used to compare two groups. Result ( 1 ) Glomerular fibrosis was correlated with TGF-β1 level. (2)MCP-1, Col-1 mRNA and protein expressions were all decreased (all P〈0.05 ), while VDR was increased in group A ( 0.65±0.44,2.01 ±0.70), B ( 1.17 ±0.59,3.19 ± 1.01 ) and C ( 3.93± 1.17,5.38± 0.48 ) with the reducing level of TGF-β1 (F=19.28,19.11, all P〈0.01 ). (3) After the intervention of 1,25-dihydroxy vitamin D3 in group D, TGF-β1, MCP-1 and Col-1 mRNA and protein expressions are decreased ( all P〈 0.05 ) ;while VDR mRNA and protein expressions was increased (t=5.61,2.95;a11P〈0.05), compared with group A. In group E, TGF-β1, MCP-1 and Col-1 expressions were decreased (all P〈0.05) ; while VDR was increased (t=5.42, 3.33; all P〈0.05) , compared with group B. (4)The s

关 键 词:骨化三醇 糖尿病肾病 转化生长因子Β1 维生素D受体 

分 类 号:R285.5[医药卫生—中药学]

 

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