Wnt-β-catenin信号分子在急性肾损伤大鼠肾组织中的表达及意义

摘要

Objective:To explore the Wnt-β-catenin signal molecule expression level in acute kidney injury rats renal tissue. Methods:A total of 48 rats accorded to the random number table method were divided into normal control group ( Control group) ,sham operation group ( Sham group) and ischemia reperfusion group ( IRI group) ,each group with 16 rats,Control group was given normal fed,IRI group were established ischemia reperfusion injury rats model,Sham group opened dorsal skin and then wound was closed. 4 rats were sacrificed respectively at 1,3,5,7 d after surgery,the pathological changes of kidney tissue were observed in the three groups,and the serum creatinine,urea level was detected in the three groups. Wnt4,β-catenin,Lrp6 protein expression was detected in three groups of rats by Western blot,Wnt4,β-catenin,Lrp6 mRNA in renal tissues were detected by Real-time quantitative RT-PCR. Results:There was no significant difference in renal injury score and serum creatinine between Control group and Sham group (P>0. 05),IRI group kidney injury score and serum creatinine,urea first increased and then gradually decreased,which was the highest in 3 d after surgery,IRI group renal injury score and serum creatinine,urea were significantly higher than those in Control group and Sham group 1,3,5,7 d after surgery (P<0. 05). There was no significant difference in Wnt4,β-catenin,Lrp6 protein between Control group and Sham group (P>0. 05),IRI group Wnt4,β-catenin,Lrp6 protein gradually increased,which reached to peak at 5 d after surgery,and then gradually decreased,IRI group Wnt4,β-catenin,Lrp6 protein were significantly higher than those in Control group and Sham group 1,3,5,7 d after surgery(P<0. 05). There was no significant difference in Wnt4,β-catenin,Lrp6 mRNA between Control group and Sham group (P>0. 05),IRI group Wnt4,β-catenin,Lrp6 mRNA gradually increased,which reached to peak at 3 d after surgery,and then gradually decreased,IRI group Wnt4,β-catenin,Lrp6 mRNA were significantly higher than those in Control group and Sham group 1,3,5,7 d after surgery (P<0. 05). Conclusion: The expression of Wnt-β-catenin signal molecule are significantly increase in acute kidney injury,and the activation of Wnt-β-catenin signal pathway is involved in the repair process of renal tissue.%目的：：探讨Wnt-β-catenin信号分子在急性肾损伤大鼠肾组织中的表达。方法：将48只大鼠按照随机数字表法分为正常对照组(Control组)、假手术组(Sham组)和缺血再灌注组(IRI组),每组16只；Control组正常喂养,IRI组建立大鼠缺血再灌注损伤模型,Sham组背侧切开后直接将伤口关闭。分别于术后第1天、第3天、第5天、第7天处死4只大鼠,观察三组大鼠肾脏组织病理学改变,并检测三组大鼠血肌酐、尿素氮水平；采用免疫印迹法检测三组大鼠肾脏组织 Wnt4、β-catenin、Lrp6蛋白表达,实时定量RT-PCR检测肾脏组织Wnt4、β-catenin、Lrp6 mRNA表达。结果：Control组、Sham组各时段肾脏损伤评分、血肌酐比较差异无统计学意义( P>0.05)；IRI组术后第1天至第7天肾脏损伤评分、血肌酐、尿素氮先上升后逐渐降低,其中术后第3天肾脏损伤评分、肌酐、尿素氮最高；IRI组术后1、3、5、7 d肾脏损伤评分、血肌酐、尿素氮显著高于Control组、Sham组(P<0.05)。 Control组、Sham组各时段 Wnt4、β-catenin、Lrp6蛋白表达差异无统计学意义(P>0.05)；IRI group术后 Wnt4、β-catenin、Lrp6蛋白逐渐增加,至术后第5天达表达高峰,随后逐渐降低；IRI 组术后1、3、5、7 d Wnt4、β-catenin、Lrp6蛋白均显著高于Control组、Sham组(P<0.05)；Control组、Sham组各时段Wnt4、β-catenin、Lrp6 mRNA表达差异无统计学意义(P>0.05)；IRI group术后 Wnt4、β-catenin、Lrp6 mRNA显著增加,至术后第3天达表达高峰,随后逐渐降低；IRI组术后1、3、5、7 d Wnt4、β-catenin、Lrp6 mRNA均显著高于Control组、Sham组( P<0.05)。结论：Wnt-β-catenin信号分子在急性肾损伤组织中表达显著增加,激活的Wnt-β-catenin信号通路参与了肾脏组织的修复过程。