天津医药

• 细胞与分子生物学 • 上一篇    下一篇

2型糖尿病大鼠脑组织EGFL-7的表达及氨基胍和Baicalein对其的干预作用

王琼,李惠勉   

  1. 郑州大学第二附属医院干部病房
  • 收稿日期:2014-01-07 修回日期:2014-07-18 出版日期:2014-11-15 发布日期:2014-11-15
  • 通讯作者: 王琼

The Expression of EGFL-7in Brain Tissue of Type 2Diabetic Rats and the Adjusting Function of Amioguanidine and Baicalein

WANG Qiong ,LI Hui mian   

  1. Department of The Cadre Ward, The Second Affiliated Hospital of Zhengzhou University
  • Received:2014-01-07 Revised:2014-07-18 Published:2014-11-15 Online:2014-11-15
  • Contact: WANG Qiong

摘要:

【摘要】  目的  研究人表皮生长因子样结构域蛋白-7(EGFL-7)因子在2型糖尿病大鼠脑组织中的表达以及氨基胍、Baicalein干预后对其影响。  方法  48只SD大鼠随机分为正常对照组、糖尿病组、氨基胍组、Baicalein组4组,每组12只。正常对照组给予普通饮食喂养;糖尿病组、氨基胍组、Baicalein组采用高脂高糖饮食联合腹腔注射小剂量链脲佐菌素的方法建立糖尿病大鼠模型。造模成功后,氨基胍组、Baicalein组分别给予氨基胍溶液、Baicalein溶液灌胃,剂量均为150mg/(kg·d),正常对照组、糖尿病组给予等量生理盐水灌胃。16周后,用免疫组织化学法及蛋白免疫印迹法(Western blotting)检测各组大鼠脑组织EGFL-7的表达。  结果  免疫组织化学法及蛋白免疫印迹法均显示,与正常对照组比较,糖尿病组、氨基胍组及Baicalein组EGFL-7的表达均明显增加(P<0.01),与糖尿病组比较,氨基胍组、Baicalein组EGFL7表达明显降低(P<0.01),Baicalein组与氨基胍组比较差异无统计学意义(P>0.05)。  结论  EGFL-7可能参与糖尿病大鼠脑血管增生与重塑,氨基胍、Baicalein在一定程度上抑制其血管增生,其抑制作用可能是通过降低EGFL-7表达来实现的。

关键词: 糖尿病, 2型;人表皮生长因子样结构域蛋白-7;氨基胍;Baicalein;血管增生;血管重塑

Abstract:

[Abstract]???Objective???To investigate the expression of epidermal growth factor-like domain7(EGFL-7) in brain tis?
sue of diabetes mellitus (DM) rats, and the intervene effect of amioguanidine and baicalein thereof.??Methods???Forty-eight SD rats were randomly divided into following four groups: control group, diabetic group, aminoguanidine group and baicalein group (n=12for each group). The control group received only pelleted food and water. Diabetic group, aminoguanidine group and baicalein group were given high fat and sugar diet in combination with small dose of intraperitoneal injection of streptozotocin to establish the diabetic model. And then aminoguanidine group and baicalein group were given aminoguanidine and baicalein150mg/(kg·d) through oral gavaging. Diabetic group and control group were given equivalent saline through oral gavaging. After16-week treatment, the expression of EGFL-7proteins in rat brain was detected by immunohistochemistry and Western blotting methods.??Results???Results of immunohistochemistry and Western blotting assay showed that the expression of EGFL-7was significantly increased in diabetic group, aminoguanidine group and baicalein group compared with that of control group (P<0.01). When compared with diabetic group, the expression of EGFL-7was significantly decreased in aminoguanidine group and baicalein group (P<0.01). There was no significant difference in the EGFL-7expression between aminoguanidine group and baicalein group (P>0.05).???Conclusion????EGFL-7may play an important role in cerebral vascular hyperplasia and remodeling of diabetic rats. Aminoguanidine and baicalein restrained cerebral vessel growth by reducing the expression of EGFL-7.

Key words: diabetes mellitus, type2, EGFL-7, amioguanidine, baicalein, vascular hyperplsia, vascular remodeling