AAV9介导的CTRP9过表达对糖尿病大鼠心肌纤维化的抑制作用
发布时间:2018-07-23 11:53
【摘要】:目的:探讨AAV9介导的CTRP9过表达对糖尿病大鼠心肌纤维化的作用及其机制。方法:45只6周龄健康SD大鼠分为对照组、GFP组和CTRP9组,每组15只。GFP组和CTRP9组腹腔注射链脲佐菌素(STZ)造模,对照组腹腔注射生理盐水;2周后,GFP组和CTRP9组分别经尾静脉缓慢注射携带GFP和CTRP9基因的AAV9,对照组同法给予生理盐水。转染12周后检测血糖及血清CTRP9水平,进行心肌Masson染色并计算胶原容积分数(CVF)以评价大鼠心肌纤维化程度,应用RT-PCR和Western blot分别检测3组大鼠心肌TGF-β1/Smads通路中各因子mRNA和蛋白水平。结果:转染12周后,与GFP组相比,CTRP9组大鼠血清CTRP9上升,血糖降低,CVF也降低(P0.05);同时TGF-β1、Smad2和Smad3 mRNA表达水平降低,Smad7 mRNA表达水平升高(P0.05),α-SMA、TGF-β1和p-Smad2/3蛋白表达水平降低,Smad7蛋白表达升高(P0.05)。结论:AAV9介导的CTRP9过表达可能通过调节TGF-β1/Smads信号通路来抑制糖尿病大鼠的心肌纤维化。
[Abstract]:Aim: to investigate the effect and mechanism of AAV9-mediated CTRP9 overexpression on myocardial fibrosis in diabetic rats. Methods Forty-five 6-week-old healthy SD rats were divided into control group (GFP group) and CTRP9 group (n = 15). Each group was treated with streptozotocin (STZ) by intraperitoneal injection of streptozotocin (STZ). After 2 weeks of intraperitoneal injection of normal saline into the control group, AAV9 carrying GFP and CTRP9 genes was slowly injected into the tail vein of the GFP group and the CTRP9 group, respectively, and the control group was given normal saline with the same method. After 12 weeks of transfection, the levels of blood glucose and serum CTRP9 were detected, myocardial Masson staining and collagen volume fraction (CVF) were used to evaluate the degree of myocardial fibrosis in rats. The levels of mRNA and protein in the TGF- 尾 1/Smads pathway of three groups were detected by RT-PCR and Western blot, respectively. Results: after 12 weeks of transfection, compared with GFP group, serum CTRP9 increased and blood glucose decreased in CTRP9 group (P0.05), while the expression of TGF- 尾 1, Smad2 and Smad3 mRNA decreased significantly (P0.05), and the expression of 伪 -SMA-TGF- 尾 1 and p-Smad2/3 protein decreased (P0.05). Conclusion the overexpression of CTRP9 mediated by AAV9 may inhibit myocardial fibrosis in diabetic rats by regulating the TGF- 尾 1/Smads signaling pathway.
【作者单位】: 郑州大学第二附属医院心血管内科;郑州大学第二附属医院急诊科;
【基金】:河南省医学科技攻关计划项目201503094
【分类号】:R587.2
本文编号:2139327
[Abstract]:Aim: to investigate the effect and mechanism of AAV9-mediated CTRP9 overexpression on myocardial fibrosis in diabetic rats. Methods Forty-five 6-week-old healthy SD rats were divided into control group (GFP group) and CTRP9 group (n = 15). Each group was treated with streptozotocin (STZ) by intraperitoneal injection of streptozotocin (STZ). After 2 weeks of intraperitoneal injection of normal saline into the control group, AAV9 carrying GFP and CTRP9 genes was slowly injected into the tail vein of the GFP group and the CTRP9 group, respectively, and the control group was given normal saline with the same method. After 12 weeks of transfection, the levels of blood glucose and serum CTRP9 were detected, myocardial Masson staining and collagen volume fraction (CVF) were used to evaluate the degree of myocardial fibrosis in rats. The levels of mRNA and protein in the TGF- 尾 1/Smads pathway of three groups were detected by RT-PCR and Western blot, respectively. Results: after 12 weeks of transfection, compared with GFP group, serum CTRP9 increased and blood glucose decreased in CTRP9 group (P0.05), while the expression of TGF- 尾 1, Smad2 and Smad3 mRNA decreased significantly (P0.05), and the expression of 伪 -SMA-TGF- 尾 1 and p-Smad2/3 protein decreased (P0.05). Conclusion the overexpression of CTRP9 mediated by AAV9 may inhibit myocardial fibrosis in diabetic rats by regulating the TGF- 尾 1/Smads signaling pathway.
【作者单位】: 郑州大学第二附属医院心血管内科;郑州大学第二附属医院急诊科;
【基金】:河南省医学科技攻关计划项目201503094
【分类号】:R587.2
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