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胰高血糖素样肽素-1对糖尿病患者心肌细胞的保护功能(4)

来源:中国药理学通报 作者:张军;谷翔;黄问银;张
发布于:2017-06-19 共7620字
  本研究首先检测了Bax和Bcl-2的表达变化,研究表明 GLP-1 对细胞凋亡的抑制是否与 Bcl-2 的上调和 Bax 的下调有关。Western blot 实验表明,与正常组相比,AGEs 组的促凋亡蛋白 Bax 表达量明显增加,而抑制凋亡蛋白 Bcl-2 的表达量减少; 而与AGEs 组相比,AGEs + GLP-1 组下调促凋亡蛋白 Bax表达,上调抑制凋亡蛋白 Bcl-2 的表达。本研究结果说明,GLP-1 可能通过调控 Bax 和 Bcl-2 蛋白的表达而缓解氧化损伤。
  
  【Fig 5 Effect of GLP-1on AGEs-inducedapoptosis of H9C2( x珋 ± s,n = 4)##P < 0. 01 vs control;*P < 0. 05 vs AGEs】  
  流式细胞术检测结果显示,GLP-1 作用后,AGEs 所导致的 H9C2 细胞凋亡率减少; AGEs 损伤组细胞 DCFH-DA 荧光强度水平升高,DCFH-DA 是活性氧的指示剂,细胞氧化应激时,ROS 产生增加;GLP-1 处理使 DCF-DA 荧光强度水平降低,说明GLP-1 可以清除活性氧,减轻心肌脂质过氧化,对抗AGEs 引起的氧化应激,减轻细胞损伤。结果说明GLP-1 可能通过调控细胞氧化还原系统,减少AGEs 引起的 ROS 过量堆积,进而保护心肌细胞。
  
  【Fig 6 Effect of GLP-1 on anti-apoptoticBcl-2 and pro-apoptotic Bax expression( x珋 ± s,n = 4)B、C: Show that the protein expression of each group H9C2 was de-termined by Western blot.#P < 0. 05,##P < 0. 01 vs control;*P < 0. 05,**P < 0. 01 vs AGEs group】  
  综上所述,GLP-1 拮抗 AGEs 诱导心肌细胞氧化损伤所导致的凋亡作用,且能通过调控凋亡相关蛋白发挥对心肌细胞保护作用。上述实验结果对GLP-1 抗氧化研究、防治糖尿病心血管并发症等疾病具有重要意义。
  
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原文出处:张军,谷翔,黄问银,张普华,殷嫦嫦,于欢,张义平,王丽丽,李卫东. GLP-1对AGEs诱导H9C2心肌细胞凋亡的保护作用研究[J]. 中国药理学通报,2017,(01):120-126.
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