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Redox Biology:NAC有助于治疗和预防糖尿病并发症

2017-09-22 Emma MedSci原创

糖尿病是一组由多病因引起的以慢性高血糖为特征的终身性代谢性疾病。长期血糖增高,大血管、微血管受损并危及心、脑、肾、周围神经、眼睛、足等,糖尿病并发症高达100多种,是目前已知并发症最多的一种疾病。

糖尿病是一组由多病因引起的以慢性高血糖为特征的终身性代谢性疾病。长期血糖增高,大血管、微血管受损并危及心、脑、肾、周围神经、眼睛、足等,糖尿病并发症高达100多种,是目前已知并发症最多的一种疾病。研究人员之前的研究发现,糖尿病会加重由中风引起的脑损伤,这和脑中甲基乙二醛(MG)与谷胱甘肽(GSH)之间的状态相关,并且这种损伤能够被N-乙酰半胱氨酸(NAC)逆转。因此研究人员调查了在糖尿病期间,大脑以及全身循环系统中出现亲血栓性表型是否与MG糖基化蛋白的增加有关,NAC是否能够逆转MG糖基化蛋白并且逆转这一过程。

研究人员利用链脲霉素(STZ)诱导形成的1型糖尿病小鼠模型,观察小静脉和小动脉(小脑循环)中的血栓形成。流式细胞术分析血液循环中血小板-白细胞聚集体(PLA),HPLC测量血小板中的GSH和MG水平,ELISA方法定量参与凝血的蛋白质。从17周开始,在饮用水中给予NAC(2mM)3周。20周时western blot检测血小板中MG修饰的蛋白质,谷胱甘肽过氧化物酶-1(GPx-1)和超氧化物歧化酶-1(SOD1)水平。

结果显示,糖尿病能够以时间依赖的方式加速血栓的形成,血液中PLAs显著升高,血小板中MG复合物增加,导致血小板GSH水平,GPx-1和SOD-1表达降低。NAC添加到糖尿病模型后,可以通过增强血小板中GSH和消除MG依赖性GSH来改变全身血管性血栓形成反应,校正抗氧化剂水平,如SOD1和GPx-1。

原始出处: 
Bin Wang, et al. N-acetylcysteine Attenuates Systemic Platelet Activation And Cerebral Vessel Thrombosis In Diabetes. Redox Biol. In Press. doi.org/10.1016/j.redox.2017.09.005

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    2018-03-19 sunylz
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    2018-02-16 丁鹏鹏
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