机构地区:[1]新疆维吾尔自治区人民医院神经内科,乌鲁木齐830001
出 处:《中华神经科杂志》2013年第6期392-396,共5页Chinese Journal of Neurology
基 金:国家自然科学基金资助项目(81060104);新疆维吾尔自治区自然科学基金资助项目(2010211A56)
摘 要:目的观察抑制磷酸腺苷活化蛋白激酶(AMPK)活性对小鼠脑缺血再灌注损伤后小胶质细胞形态、功能及炎性因子的影响,探讨抑制AMPK活性的神经保护作用机制。方法120只雄性昆明小鼠,采用随机数字法分为假手术组、缺血再灌注组、缺血再灌注治疗组(每组均40只)。缺血再灌注治疗组于缺血时腹腔注射AMPK特异性抑制剂compoundC(20mg/kg)。采用线栓法制作小鼠大脑中动脉栓塞模型,再灌注24h后观察神经功能缺损评分、脑梗死体积、小胶质细胞特异性标志物离子钙接头蛋白(Ibal)表达,测定诱导型一氧化氮合酶(iNOS)、尼克酰胺腺嘌呤二核苷酸磷酸氧化酶2(gp91phox)、肿瘤坏死因子仅(TNF—α)和白细胞介素-1β(IL-1β)的表达。结果脑缺血再灌注损伤后,缺血再灌注治疗组较缺血再灌注组神经功能缺损评分和脑梗死体积显著减小;假手术组小鼠有少量Ibal[每高倍视野(5.97±1.26)个]、iNOS[每高倍视野(6.25±2.02)个]、gp91phoxmRNA(0.010±0.007)、TNF—α.[(249.62±48.37)pg/mg]和IL-1β[(107.41±11.77)pg/mg]表达,缺血再灌注组Ibal[每高倍视野(11.36±1.18)个,P=0.000]、iNOS[每高倍视野(16.38±2.43)个,P=0.000]、gp91^phoxRNA(0.240±0.067,P=0.000)、TNF—α[(442.92±97.59)pg/mg,P=0.002]、IL-1β[(209.09±24.69)pg/mg,P=0.000]表达显著增加,与缺血再灌注组比较,缺血再灌注治疗组Ibal[每高倍视野(7.60±1.62)个,P=0.000]、iNOS[每高倍视野(9.32±2.20)个,P=0.000]、TNF—α[(290.60±61.40)pg/mg,P=0.007]、IL-1β[(142.61±20.60)pg/mg,P=0.000]表达显著降低,gp91phoxmRNA(0.170±0.055,P=0.052)表达有下降趋势,但无统计学意义。结论抑制AMPK活性具有神经保护作用,其机制可能与抑制小胶质细胞的活化及减少iNOS、gp9Objective To observe the effect of inhibition of adenosine monophosphate activated protein kinase (AMPK) on shape, function and inflammatory factor of mieroglia for mice after cerebral ischemia-reperfusion injury and the action mechanism of AMPK inhibition on neuroprotective effects. Methods One hundred and twenty male Kunming mice were randomly divided into sham group, ischemia- reperfusion group, ischemia-reperfusion therapy group (all n = 40 ). Each mouse in ischemia-reperfusion therapy group was given an intraperitoneal inject of compound C (20 mg/kg) after oeelusion. A mode of middle cerebral artery occlusion was made by insertion of a thread through internal carotid artery. After 24 hours of reperfusion, neurological deficit scores, infarct volume and expression of specific marker for microglia of ionized calcium-binding adaptor molecule 1 ( Ibal ) were investigated, and the expressions of inducible nitric oxide synthase (iNOS), nicotinamide adenine dinucleotide phosphate oxidase 2 (gp91phox), tumor necrosis factor-α (TNF-α) and interleukin-1β ( IL-1β ) were determined. Results After cerebral ischemia-reperfusion injury, neurological deficit scores and infarct volume of ischemia-reperfusion therapy group were significantly reduced compared with ischemia-reperfusion group. Small amount of Ibal ( (5.97 ± 1.26)/HP), iNOS ( (6. 25 ±2. 02)/HP), gp91vhox mRNA (0. 010 +0. 007), TNF-α( (249.62 ±48.37) pg/mg) and IL-1 β( (107.41 ±11.77) pg/mg) expressions were observed in sham group. The expressions of Ibal, iNOS, gp91phox mRNA, TNF-α and IL-1β in ischemia-reperfusion group increased significantly to (11.36±1. 18)/HP(P=0.000), (16. 38 ±2. 43 )/HP ( P =0.000), 0.240 ±0.067(P=0.000), (442. 92 ±97.59) pg/mg(P =0. 002) and (209. 09 ±24. 69) pg/mg (P =0. 000) respectively. Compared with ischemia-reperfusion group, the expressions of Ibal, iNOS, TNF-α and IL-1 β in ischemia-reperfusion therapy group
关 键 词:脑缺血 再灌注损伤 AMP活化蛋白激酶类 小神经胶质细胞 一氧化氮合 酶 肿瘤坏死因子α
分 类 号:R743.3[医药卫生—神经病学与精神病学]
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