PPARγ激动剂吡格列酮对创伤性脑损伤后神经细胞凋亡及
ICMA-1表达的影响
邓永兵;刘科;唐文渊;蒋雪
【期刊名称】《中华创伤杂志》 【年(卷),期】2012(028)010
【摘要】Objective To investigate the effects of peroxisome proliferator-activated receptor gamma (PPARγ) agonist pioglitazone on delayed neuronal death,apoptosis of neurocytes,and expression of intercellular adhesion molecule-1 ( ICAM-1 ) following traumatic brain injury (TBI) in rats.Methods Thirty-six Sprague-Dawley rats were randomized into sham injury group,control group and pioglitazone treatment group,with 12 rats in each group.TBI model was established by modified Feeney method.Treatment grouP received intragastric administration of pioglitazone at a dosage of 10 mg/kg,and the sham injury group and the control group were lavaged with isometric 0.2％ dimethyl sulphoxide.Paraffin sections of brain tissues collected at 48 hours after TBI were employed to observe delayed neuronal death,apoptosis of neurocytes and expression of ICAM-1 by Nissl staining,TUNEL staining and immunochemistry respectively.Results ( 1 ) Cell loss rate of Nissl body in the treatment group [ ( 38.59 ± 1.97 ) ％ ]was significantly lower than that of the control group [ (51.25 ± 4.01 ) ％ ] ( P ＜ 0.05 ),but was higher than that of the sham injury group [ (8.65 ± 1.23 ) ％ ] ( P ＜
0.01 ).(2) The number of apoptotic neurocytes of the treatment group (31.67 ± 4.76) was significantly lower than that of the control group (45.33 ± 4.68 ) ( P ＜ 0.05),but was higher than that of the sham injury group ( 16.83 ± 2.04 ) ( P ＜ 0.01 ).(3) The mean optical degree of ICAM-1 positive expression of the treatment group (0.26 ± 0.04) was significantly lower than that of the control group (0.31 ± 0.04) ( P ＜ 0.05 ),but was higher than that of the sham injury group (0.10 ± 0.02 ) ( P ＜ 0.01 ).Conclusions The PPARγagonist pioglitazone can reduce the apoptosis of neurocytes and protect neurons after TBI.Meanwhile,its suppression of ICAM-1 expression is probably a mechanism of the suppression of inflammatory reaction and neural protection.%目的 观察过氧化物酶体增殖物激活受体γ( peroxisome proliferator-activated receptor -γ,PPARγ)激动剂吡格列酮对大鼠创伤性脑损伤(traumatic brain injury,TBI)后迟发性神经元死亡、细胞凋亡及细胞间黏附分子-1(intercellular adhesion molecule-1,ICAM-1)表达的影响. 方法 将36只SD大鼠按随机数字表法分为假致伤组、对照组和吡格列酮治疗组,每组12只.采用改良的Feeney法制作脑创伤模型,治疗组采用吡格列酮(10 mg/kg)灌胃,假致伤组和对照组用等量体积分数0.2％二甲基亚砜灌胃.致伤后48 h取脑组织,石蜡切片,分别行Nissl、TUNEL染色和ICAM -1免疫组化测定,观察迟发性神经元死亡、神经细胞凋亡程度及ICAM-1表达. 结果 (1)治疗组尼氏体脱失细胞率为(38.59±1.97)％,明显低于对照组的(51.25±4.01)％ (P ＜0.05),高于假致伤组的(8.65±1.23)％(P＜0.01)；(2)治疗组神经细胞凋亡计数为31.67±4.76,明显低
于对照组45.33 ±4.68(P＜0.05),高于假致伤组16.83±2.04(P ＜0.01)；(3)治疗组ICAM-1表达阳性细胞的平均吸光度值为0.26±0.04,明显低于对照组0.31±0.04(P ＜0.05),高于假致伤组0.10±0.02(P＜0.01). 结论 PPARγ激动剂吡格列酮能减少TBI后的神经细胞凋亡,保护神经元；其抑制ICAM-1的表达可能是其抑制炎症反应、发挥神经保护作用的机制之一. 【总页数】5页(941-945)
【关键词】过氧化物酶体增殖物激活受体;脑损伤;细胞凋亡;细胞黏附分子 【作者】邓永兵;刘科;唐文渊;蒋雪
【作者单位】400014 重庆市急救医疗中心神经外科;400014 重庆市急救医疗中心神经外科;重庆医科大学第一附属医院神经外科;重庆医科大学生化与分子生物学教研室 【正文语种】中文 【中图分类】 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_chinese-journal-trauma_thesis/0201234574496.html 【相关文献】
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PPARγ激动剂吡格列酮对创伤性脑损伤后神经细胞凋亡及ICMA-1表达的影响
