摘要
目的探讨急性脑缺血再灌注损伤大鼠肿瘤坏死因子-α(TNF-α)、白细胞介素-10(IL-10)和细胞凋亡的变化规律及吡格列酮(Pioglitazone,PGZ)干预对上述指标的影响。方法将84只SD大鼠随机分为PGZ组(n=42)及对照组(n=42),前者通过改良Zea-longa法建立脑缺血再灌注损伤模型后立即经尾静脉注射10 mg/kg的PGZ,对照组则用同等剂量的生理盐水代替PGZ,以后各组分别每24小时腹腔注射1次等量PGZ/生理盐水,直至SD大鼠被处死,并以伤后处死时间分为7个亚组,分别为1 h、3 h、6 h、12 h、24 h、3 d和7 d,每个亚组各6只。取缺血灶周围组织采用免疫组织化学方法检测并比较脑组织中TNF-α及IL-10的蛋白表达,同时采用TUNEL法观察并比较细胞凋亡情况。结果 PGZ组TNF-α蛋白表达量较对照组明显下降(P<0.05),而IL-10显著上升(P<0.05),且两组中二者均呈显著负相关(P<0.01);同时PGZ组脑组织细胞凋亡数量较对照组也有所下降(P<0.05)。结论脑缺血再灌注损伤后,吡格列酮可能通过降低TNF-α的活性上调IL-10的表达,减轻炎症反应,阻止神经细胞进一步凋亡,从而对缺血再灌注损伤大鼠神经细胞发挥保护作用。
Objective To investigate the changes of TNF-α, IL-10 and cell apoptosis of cerebral ischemia-reperfusion injury and the influence of Pioglitazone(PGZ) on these parameters in rats. Methods Eighty-four male SD rats were ran-domly divided into two groups, PGZ group (n=42) and the control group (n=42). The PGZ group was treated with improved Zea-longa method and received tail vein injections of PGZ (10 mg/kg) immediately after injury, the control group re-ceived tail vein injections with the same dose sodium chloride injection immediately, after injury and repeat one time everyday until the rats was killed. Each group was divided into seven subgroups by sacrificed time after injury, those were 1 h, 3 h, 6 h, 12 h, 24 h, 3 d, and 7 d, each subgroup got 6 rats. Each subgroup were randomly selected three rats after being killed, detected the expression of TNF-α and IL-10 of rats contusion peri tissues brain tissue by using im munohistochemical methods, while using TUNEL method to observe the peri cell apoptosis after brain contusion. Results The expression of TNF-α in each PGZ group was significantly decreased but the IL-10 was significant ly increased compared with the control group (P<0.05),and a significant negative correlation between the both of parameters in two groups as well (P<0.01);At the same time the number of apoptotic cells was decreasing (P<0.05). Conclusion Pioglita-zone is probably through the route of relieving inflammation response, reducing the change of secondary brain injury af-ter traumatic brain injury and decreasing neural cell apoptosis, and then provide protection of neurocytes.
出处
《中国现代医生》
2014年第35期1-4,共4页
China Modern Doctor
基金
广西自然科学基金(2012GXNSFAA053102)
