冬虫夏草通过诱导血色素加氧酶-1表达抑制肾小管间质纤维化

目的：观察冬虫夏草对单侧输尿管梗阻（unilateral ureteral obstruction,UUO）模型大鼠肾小管间质纤维化进展的保护作用。方法：72只雄性清洁级SD大鼠随机分为4组：假手术组,UUO模型组,UUO加冬虫夏草治疗组,UUO加冬虫夏草和血色素加氧酶抑制剂卟啉锌[（zinc（a）protoporphyrinη,znpp）]治疗组。各组大鼠分别于术后（建模后）第3、7、14天分批处死,留取手术侧（模型组梗阻侧）肾脏组织。采用HE、Masson染色、荧光定量PCR、免疫组织化学染色评价肾小管间质纤维化损伤程度并检测肾脏组织血色素加氧酶-1（hemoglobin oxygenase-1,HO-1）,α平滑肌肌动蛋白（α-smooth muscle ac-tin,α-SMA）mRNA及蛋白表达变化情况。结果：冬虫夏草治疗组相对于UUO模型组,肾脏病理损伤及进展程度明显减轻且HO-1的表达上调,α-SMA的表达下调（P〈0.05）,而冬虫夏草加HO-1抑制剂znpp后,以上作用明显减弱。结论：冬虫夏草可以通过诱导血色素加氧酶的表达减轻肾小管间质纤维化程度。     

内质网应激相关凋亡途径参与单侧输尿管梗阻大鼠肾间质纤维化

目的 探讨内质网应激（ERS）相关凋亡途径在单侧输尿管梗阻（UUO）大鼠肾间质纤维化发生、发展中的作用。 方法 健康雄性Wistar大鼠25只,按随机数字表法分为UUO模型组（n=18）和假手术组（n=7）,UUO模型组行左侧输尿管结扎术,假手术组仅分离输尿管不结扎,分别于术后3 d、7 d、14 d处死各组大鼠,行HE和Masson染色,观察肾脏病理变化;比色法测定肾组织羟脯氨酸（HYP）含量;免疫组化法检测α平滑肌肌动蛋白（α-SMA）;原位末端标记法（TUNEL）与DNA电泳观察肾小管间质细胞凋亡情况;RT-PCR法检测梗阻侧肾组织ERS相关分子葡萄糖调节蛋白78（GRP78）mRNA表达变化;Western印迹法分析凋亡相关蛋白半胱氨酸天门冬氨酸蛋白酶3（caspase-3）和GRP78的蛋白表达变化。 结果 与假手术组比较,UUO模型组肾脏病理改变加重,肾间质纤维化程度随梗阻时间延长逐渐加重,肾组织HYP含量显著升高（P < 0.05）,肾组织α-SMA也在肾小管间质细胞广泛表达,TUNEL染色及DNA琼脂糖凝胶电泳提示大量的肾小管间质细胞凋亡。UUO模型组GRP78 mRNA表达于术后3 d即发生显著上调,而蛋白表达在术后7 d开始出现显著变化,与假手术组差异均有统计学意义（均P < 0.01）;在此后观察期间内GRP78 mRNA和蛋白均持续高水平表达。模型组大鼠肾组织caspase-3的蛋白表达在UUO术后3 d即有显著上调（P < 0.05）,且随着梗阻时间延长进行性升高,于术后7 d、14 d增多更为显著,与假手术组差异均有统计学意义（P < 0.05）。相关分析显示GRP78蛋白表达与肾组织HYP含量和caspase-3蛋白表达均呈正相关（r = 0.657,P < 0.01;r = 0.714,P < 0.01）。 结论 UUO早期即可诱导ERS标志蛋白表达变化,触发ERS。长期ERS可诱导肾小管间质细胞凋亡;caspase-3介导的ERS相关凋亡途径可能参与了肾间质纤维化过程。     

参附注射液对单侧输尿管梗阻大鼠肾脏肝细胞生长因子表达的影响

目的：探讨单侧输尿管梗阻后大鼠肾间质纤维化发生过程中肝细胞生长因子（HGF）的表达及中药参附注射液对其的影响。方法：采用单侧输尿管结扎（UUO）制造梗阻性肾病模型，将56只大鼠随机分为对照组（假手术组）、手术组（UUO组）和治疗组（UUO＋参附），术后7d、14d观察肾组织病理改变，应用免疫组织化学方法检测肾组织中HGF的表达。结果：与对照组相比，手术组肾间质出现了明显的纤维化，HGF的表达在术后第7天明显增加，第14天较第7天减弱，与手术组相比，治疗组肾间质纤维化明显减轻，而且HGF的表达在术后第7天明显上调，第14天较第7天上调更明显，有统计学差异（P〈0．05）。结论：参附注射液可以上调肾组织HGF的表达，减轻肾小管一间质纤维化，发挥肾保护作用。     

Increased oxidative stress in mouse kidneys with unilateral ureteral obstruction.

BACKGROUND: Unilateral ureteral obstruction (UUO) is a well-established experimental model of renal injury leading to interstitial fibrosis. The molecular and cellular mechanism(s) of interstitial fibrosis in UUO kidney is beginning to be elucidated. Oxidative stress has been implicated in the pathogenesis of various forms of renal injury; however, little is known about its involvement in the setting of ureteral obstruction. METHODS: To investigate the possible involvement of oxidative stress in the obstructive nephropathy, we studied the occurrence and distribution of Nepsilon-carboxymethyl-lysine (CML) in the kidneys after ureteral obstruction. CML is an integrative biomarker of the cumulative protein damage induced by glycoxidation. Heme oxygenase-1 (HO-1) mRNA and protein expression, which is a sensitive and reliable indicator of oxidative stress, were also examined. RESULTS: CML immunoreactivity was found in the interstitium of UUO kidneys 10 days after the onset ureteral obstruction. HO-1 mRNA was up-regulated as early as 12 hours after ureteral obstruction. HO-1 immunoreactivity was observed in the periglomerular and peritubular interstitium two days after ureteral obstruction. CONCLUSIONS: These results strongly suggested the presence of increased oxidative stress in the interstitium of UUO kidneys. The oxidative stress and the formation of various kind of biological active oxidative products in the interstitium are supposed to play significant roles in UUO kidney.     

坎地沙坦对单侧输尿管梗阻大鼠肾间质纤维化及肾脏骨桥蛋白表达的影响

目的 观察坎地沙坦(CAN)对单侧输尿管梗阻(UUO)大鼠肾间质纤维化的影响,并观察骨桥蛋白(OPN)与肾间质纤维化的关系及CAN干预对肾脏OPN表达的影响,探讨其在纤维化中的作用机制.方法 (1)36只成年雄性SD大鼠随机分为3组,每组12只:假手术组(Sham)、UUO模型组(UUO)、坎地沙坦治疗组(CAN).UUO模型组和CAN组大鼠行左侧输尿管结扎术,Sham组只游离左侧输尿管但不结扎.CAN组于术前1 d开始用CAN治疗[10 mg/(kg·d)]灌胃.术后第7、14天分别处死大鼠,左侧肾脏组织行Masson染色,免疫组织化学方法检测肾组织中OPN的表达,逆转录-聚合酶链反应(RT-PCR)检测OPN mRNA表达水平.结果 Masson染色结果显示术后7 d和14 d UUO组大鼠肾纤维化阳性面积分别为15.2%和24.8%,CAN组为1O.1%和18.5%.CAN组与UUO组大鼠术后7 d和14 d大鼠肾纤维化阳性面积差异有统计学意义(P＜0.05).UUO模型大鼠OPN蛋白及mRNA水平均较Sham组明显升高(P＜0.01),CAN组OPN蛋白及mRNA水平较UUO组明显降低(P＜0.05),但较Sham组高(P＜0.01).结论 CAN能有效地延缓UUO大鼠肾间质纤维化的进展,其延缓肾间质纤维化作用可能与下调OPN蛋白和mRNA有关.     

干细胞因子联合粒细胞集落刺激因子动员骨髓干细胞促进单侧输尿管梗阻大鼠肾脏损伤的修复

目的 研究干细胞因子（SCF）联合粒细胞集落刺激因子（G-CSF）动员单侧输尿管梗阻（UUO）大鼠骨髓干细胞对肾间质中微血管、纤维化程度和肾功能的影响,并探讨其对微血管影响的可能机制。 方法 128只大鼠按数字随机法分为假手术组（Sham组）、SCF联合G-CSF动员组（SCF-G组）、UUO组、UUO+SCF-G组。于实验第 5、14、21、28天每组各随机抽取8只处死,检测Scr、肾间质CD34阳性表达细胞数目和Ⅷ因子阳性表达细胞数目、肾间质纤维化和间质病理损害积分、肾皮质血管内皮生长因子（VEGF）mRNA和血小板反应蛋白1（TSP-1）mRNA的表达。 结果 (1)UUO组2周时可见到肾间质纤维化伴肾小管周微血管的丢失。（2）UUO+SCF-G组肾间质干细胞归巢数目明显高于UUO组和Sham组（P < 0.05）。（3）UUO+SCF-G组肾小管周微血管指数减少出现的时间晚于UUO组（P < 0.05）。（4）第14、21、28天UUO+SCF-G组间质化纤维程度和肾小管损伤程度均轻于UUO组（P < 0.05）。（5）UUO+SCF-G组术后VEGF mRNA表达下调出现的时间晚于UUO组,且表达均高于同期UUO组 （P < 0.05)。（6）UUO+SCF-G组术后TSP-1 mRNA表达增高出现的时间晚于UUO组,且表达均低于同期UUO组（P < 0.05）。（7）在UUO组和UUO+SCF-G组中,肾小管周微血管指数与Scr、间质纤维化积分和肾小管间质病理积分均呈负相关;肾皮质VEGF mRNA表达与肾小管周微血管指数呈正相关;肾皮质TSP-1 mRNA表达与肾小管周微血管指数呈负相关。 结论 （1）UUO大鼠存在肾小管周微血管丢失,并与肾间质纤维化及间质病理损伤相关。（2）联合应用SCF和G-CSF动员骨髓干细胞可以归巢至受损的肾脏,有助于减少肾小管周微血管丢失,并进而减轻肾间质纤维化和间质损害,保护肾功能。（3）联合应用SCF和G-CSF可以上调肾皮质VEGF mRNA水平和下调TSP-1 mRNA水平,这可能是其促进内皮细胞修复及保护肾间质微血管损伤的机制之一。     

血红素加氧酶-1对乳鼠心肌细胞缺氧复氧损伤的影响

目的 探讨血红素加氧酶-1(HO-1)对乳鼠心肌细胞缺氧复氧损伤的影响.方法 新生SD大鼠8只,日龄1～3 d,原代培养心肌细胞,随机分为4组:正常对照组(C组)常规培养8 h;缺氧复氧组(HR组)采用缺氧2 h,复氧6 h的方法制备心肌细胞缺氧复氧模型;血晶素组(Hemin组)缺氧前24 h及缺氧即刻,培养基中加入Hemin,终浓度为20 μmol/L;血晶素+锌原卟啉组(Hemin+ZnPP组)缺氧前24 h及缺氧即刻培养基中同时加入Hemin及ZnPP,终浓度均为20 μmol/L.各组细胞均接种于35 mm培养皿(2 ml/皿)或50 ml培养瓶(3 ml/瓶),每组45皿和3瓶.于复氧结束后采用蛋白印迹法测定心肌细胞HO-1表达,台盼蓝染色法测定心肌细胞存活率,应用全自动生化分析仪测定细胞培养液乳酸脱氧酶(LDH)活性,超声破碎细胞离心后取上清,采用硫代巴比妥酸法测定细胞MDA水平,黄嘌呤氧化酶法测定细胞SOD活性.结果 与C组比较,其余3组培养液LDH活性、心肌细胞MDA水平及HO-1表达升高,心肌细胞存活率及SOD活性降低(P＜0.05).与HR组比较,Hemin组培养液LDH活性、心肌细胞MDA水平降低,HO-1表达、心肌细胞存活率及SOD活性升高(P＜0.05),Hemin+ZnPP组上述指标差异无统计学意义(P＞0.05).HR组和Hemin+ZnPP组细胞缺氧复氧损伤明显,Hemin组细胞缺氧复氧损伤减轻.结论 HO-1可减轻乳鼠心肌细胞缺氧复氧损伤.     

NGAL、MMP-9及TIMP-1在单侧输尿管梗阻大鼠肾组织中的表达

目的：动态观测单侧输尿管梗阻大鼠肾组织中中性粒细胞相关脂质运载蛋白（NGAL）、基质金属蛋白酶-9（MMP-9）及金属蛋白酶组织抑制因子（TIMP—1）的表达变化,探讨NGAL分子在肾小管间质纤维化发展中的作用机制。方法：将48只雄性SD大鼠随机分为UUO模型组及假手术（SOR）组,每组24只,UUO组行左侧输尿管梗阻术,SOR组仅游离左侧输尿管不结扎。术后第1、4、7、14天分别处死每组6只大鼠,取左肾行HE＆Masson染色,并用免疫组化EI,iVision‘M1plus法检测肾组织NGAL、MMP-9及TIMP-1的表达。结果：HE、Masson染色切片示：UUO组间质损伤指数在术后各时间点高于SOR组（P〈0．05）。免疫组化结果显示：UUO组术后各时间点NGAL表达高于SOR组（P〈0．05）,与肾小管损伤指数呈明显负相关;MMP-9在uu0术后早期（1～7天）有所上升,随着病程进展,7～14天表达有所下降;TIMP1在UUO术后表达逐渐增强;NGAI。与MMP-9／TIMP-1比值呈明显正相关。结论：NGAL在肾间质纤维化早期发挥负向调节作用,对调节MMP-9／TIMP-1的平衡亦发挥重要作用。     

Effect and mechanism of soluble epoxide hydrolase inhibitor in renal fibrosis mice model

Objective To investigate the effect and mechanism of soluble epoxide hydrolase inhibitor (sEHI) for NF-κB pathway and cell circle arrest of tubular epithelial cell in unilateral ureteral obstruction (UUO) mice model. Methods Thirty-two healthy C57BL/6 male mice performed UUO surgery to induce renal interstitial fibrosis. Animals were randomly divided into 4 groups: sham group (n=8), sEHI (1 mg?kg-1?d-1) group (n=8), UUO group (n=8) and UUO+sEHI (1 mg?kg-1?d-1) group (n=8). Daily sEHI [1-(1-methylsulfonyl-piperidin-4-yl)-3-(4-trifluoromethoxy-phenyl)-urea, TUPS] or 2% DMSO was applied to mice by oral gavage from day 1 to day 14 after surgery. All mice were sacrificed at day 14 and kidneys were harvested for further analysis. The changes of renal tissue morphology and pathology were observed by Hematoxylin and eosin (HE) and sirius red staining. The expressions of sEH, nuclear factor κB p65 (NF-κB p65) and IκB were measured by Western blotting. The expressions of TNF-α, IL-1β, MCP-1, IL-6, TGF-β, CTGF, collagen-IV and α-SMA were analyzed by real-time PCR. Immunofluorescence staining of phospho-histone H3 (p-HH3) and Ki67 was performed to determine the stage of cell cycle G2/M arrest. Results The expression and activity of sEH increased in UUO group (P﹤0.05). Administration of sEHI inhibited activity of sEH and infiltration of inflammatory cell in tubular interstitial, as well as attenuated tubular damage and tubular interstitial fibrosis. Western blotting analysis revealed administration of sEHI inhibited up-regulated NF-κB p65 and down-regulated IκB in UUO group (P﹤0.05). Real-time PCR demonstrated that administration of sEHI obviously decreased the mRNA expression of cytokines and fibrosis markers, including of TNF-α, IL-1β, MCP-1, IL-6, TGF-β, CTGF, Collagen-IV, α-SMA (P﹤0.05). Immunofluorescence staining showed that there were much more p-HH3 and Ki67 double positive nuclear tubular epithelial cells and interstitial cells in UUO group, compared with Sham group (P﹤0.05). Administration of sEHI reduced the number of double positive nuclear cell only in tubular epithelial cells (P﹤0.05), but not in interstitial cells. Conclusions In UUO tubular interstitial fibrosis model, sEHI inhibits the activation of NF-κB pathway by down-regulating p65 and up-regulating IκB and ameliorates the infiltration of inflammatory cells. In addition, sEHI plays anti-fibrosis effect by moderating cell cycle G2/M arrest and reducing the excrete of pro-fibrosis factors of tubular epithelial cells.     

Norcantharidin inhibits renal interstitial fibrosis through down-regulating protein phosphatase-2Ac

Objective To observe the relationship between protein phosphatase-2Ac (PP2Ac) and renal interstitial fibrosis, and to investigate the effects and the underlyingmechanism of norcantharidin (NCTD) on renal fibrosis in unilateral ureteral obstruction (UUO) rats. Methods Sixteen male Sprague-Dawley rats were randomly divided into four groups: Sham operation group, UUO day 3 group, UUO day 7 group and UUO day 14 group. The rats were sacrificed at day 1, 3, 7, 14 respectively and kidneys were harvested. Immunohistochemical staining were used to detect the expression of fibronectin (FN), type I collagen (Col-I) and PP2Ac. Another twenty male Sprague-Dawley rats were also randomly divided into four groups: Sham operation group, UUO group, low dose NCTD treatment group (0.05mg·kg-1·d-1) and high dose NCTD treatment group (0.1 mg·kg-1·d-1). The rats in NCTD treatment groups were injected with norcantharidin into abdominal cavity 1 day before operation, while the Sham and UUO group were injected with equal normal saline. Rats were sacrificed at day 14 after surgery and the kidneys were harvested. Immunohistochemical staining, Western blotting and real-time PCR were used to detect the expression of FN, Col-I, α-SMA, E-cadherin and PP2Ac. Results (1)Compared with sham group, the expression of PP2Ac, FN and Col-I increased with the development of ureteral obstruction (all P＜0.05). The expression of PP2Ac was positively correlated with the expression of FN and Col-I (r＝0.894 and 0.887, all P＜0.05). (2)Compared with sham group, the expression of FN, Col-I, α-SMA increased and the E-cadherin decreased in UUO group, the expression of PP2Ac also increased (all P＜0.05). After the treatment of NCTD, the above changes were all alleviated in a dose dependent manner, and the expression of PP2Ac was down-regulated (all P＜0.05). Conclusion NCTD can ameliorate tubulointerstitial fibrosis and its anti-fibrosis effect may be related to its inhibition to PP2Ac.     

水飞蓟素对单侧输尿管梗阻大鼠肾脏纤维化的影响

目的探讨水飞蓟素对单侧输尿管梗阻（UUO）大鼠肾间质纤维化的作用及其可能机制。方法雄性SD大鼠36只,随机分为3组：假手术组（C组）、模型组（M组）及水飞蓟素治疗组（S组,50mg·kg^-1·d^-1）,每组12只。术后第7、21天分别处死每组大鼠6只,光镜观察梗阻肾组织病理变化,并分别用免疫组织化学方法及RT-PCR方法半定量检测各组肾组织骨桥蛋白（OPN）和纤维连接蛋白（FN）的蛋白质及mRNA表达水平。结果M组大鼠肾小管间质损伤及纤维化明显,S组病变与其相似但显著减轻（P〈0．05）;与C组相比,M组OPN和FN的mRNA及蛋白质表达水平均显著上调（P〈0．01）,S组表达较M组明显下降（P〈0．01,P〈0．05）。结论水飞蓟素能抑制OPN和FN的表达进而减少细胞外基质的沉积而发挥肾脏保护作用。     

怡肾丸对单侧输尿管结扎模型大鼠肾脏TGF-β1及P38MAPK表达的影响

目的:观察不同时相单侧输尿管结扎(UUO)模型大鼠肾脏组织,通过测定肾脏组织TGF-β1及丝裂原活化蛋白激酶p38(P38MAPK)的含量,探讨怡肾丸是否是通过阻断P38MAPK信号传导通路来延缓肾间质纤维化的发展从而达到保护肾脏的目的。方法:采用UUO诱导的肾间质纤维化模型,分别于造模后3、7、14d三个时间点处死该时间点大鼠,并用免疫组化法检测大鼠肾脏TGF-β1及P38MAPK的表达。结果:(1)怡肾丸组对改善大鼠活动等均优于其余各组;(2)通过采用HE及Masson染色观察UUO大鼠肾小管间质组织形态学的改变;(3)免疫组化结果提示怡肾丸组及依那普利组肾小管上皮细胞TGF-β1及P38MAPK的表达低于模型组。结论:(1)P38MAPK的活性在大鼠梗阻性肾病组织中随时间增加明显增高,提示P38MAPK的活化与肾间质纤维化有正相关。(2)怡肾丸可能通过抑制TGF-β1及P38MAPK的表达,减轻炎症反应和纤维化程度,从而达到保护肾脏、延缓肾间质纤维化的作用。     

小鼠单侧输尿管梗阻诱导肾脏纤维化模型中Cadherin6的表达变化

目的研究钙黏蛋白6(cadherin6,CDH6)在肾脏纤维化中表达的变化。方法建立单侧输尿管梗阻(UUO)小鼠模型,术后21天收获肾脏组织,HE染色观察肾间质纤维化程度,RT-q PCR检测肾组织FSP-1、TGF-β1、CDH6 m RNA表达量,免疫组化染色检测肾组织FSP-1、CDH6蛋白表达量;TGF-β1刺激人肾小管上皮细胞HK-2,RT-q PCR及Western Blot分别检测FN1、PAI-1、CDH6 m RNA表达量及CDH6蛋白表达量。结果 HE染色显示UUO组小鼠肾脏出现肾小管萎缩、大量基质沉积,与Sham组相比,UUO组小鼠肾脏组织FSP-1、TGF-β1、CDH6 m RNA表达量及FSP-1、CDH6蛋白表达量均上调;细胞实验结果显示,与空白对照组相比,TGF-β1诱导的HK-2细胞形态向成纤维细胞转变,FN1、PAI-1m RNA表达水平上调,CDH6 m RNA及蛋白表达水平上调。结论 TGF-β1诱导的肾小管上皮细胞CDH6及纤维化相关因子表达上调,伴随上皮细胞向间质表型转化,可能参与单侧输尿管梗阻诱导的小鼠肾脏纤维化的发展。     

缺氧诱导因子-1α在肾间质纤维化中的表达及意义

目的：探讨缺氧诱导因子-1α（HIF-1α）致肾间质纤维化的作用。方法：60只雄性SD大鼠随机分为假手术组（SOR）和单侧输尿管梗阻（UUO）模型组。术后第3天,第7天,第14天各处死大鼠10只,肾组织行HE染色并观察病理变化。采用免疫组织化学和荧光定量逆转录聚合酶链反应（Q-RT-PCR）法检测肾脏组织中HIF-1α、CTGF、TGF-β1蛋白和mRNA表达。结果：与假手术组相比,模型组大鼠肾脏病理损害进行性加重;HIF-1α、CTGF、TGF-β1蛋白表达随梗阻时间的延长逐渐增加;与假手术组相比HIF-lα、CTGF、TGF-β1mRNA表达明显增加（P〈0.05）;相关分析显示,模型组第3天HIF-lαmRNA表达与CTGFmRNA,TGF-β1mRNA表达分别呈正相关（r=0.748,0.659,P〈0.05）,模型组第7天组HIF-1αmRNA分别和CTGFmRNA、TGF-β1mRNA呈正相关（分别为r=0.663,0.645,P〈0.05）,模型组第14天组HIF-1αmRNA分别和CTGFmRNA、TGF-β1mRNA呈正相关（分别为r=0.515,0.752,P〈0.05）。结论：HIF-1α可能通过调节CTGF、TGF-β1的表达参与了肾间质纤维化发生和发展的过程。     

Wnt-7a蛋白抑制单侧输尿管梗阻小鼠肾脏上皮细胞-间充质细胞转分化

目的 观察Wnt-7a蛋白对单侧输尿管梗阻(UUO)模型小鼠肾脏纤维化的拮抗作用.方法 18只雄性C57BL/6小鼠按随机数字法分为假手术组、UUO模型组和Wnt-7a蛋白治疗组,每组6只.于术后7d处死小鼠,留取梗阻侧肾组织,行Masson染色观察肾间质纤维化程度;免疫组化染色检测肾组织E-钙黏蛋白、α-平滑肌肌动蛋白( α-SMA)、波形蛋白的表达;Western印迹法测定肾皮质中E-钙黏蛋白和 α-SMA的表达.结果 术后第7天,与假手术组相比,模型组体质量显著下降(P＜0.05),肾组织间质纤维化相对面积显著增多(P＜0.05),肾组织α-SMA及波形蛋白的表达显著增加(P＜0.05),E-钙黏蛋白表达显著减少(P＜0.05).与模型组相比,Wnt-7a蛋白治疗组体质量无明显改变(P＞0.05),肾组织间质纤维化相对面积显著减少(P＜0.05),α-SMA及波形蛋白的表达显著减少(P＜0.05),E-钙黏蛋白表达显著增高(P＜0.05).结论 Wnt-7a蛋白可以抑制肾脏上皮细胞,间充质细胞转分化的发生而减轻肾脏纤维化.