国际脑血管病杂志
國際腦血管病雜誌
국제뇌혈관병잡지
INTERNATIONAL JOURNAL OF CEREBROVASCULAR DISEASES
2015年
6期
453-458
,共6页
王国峰%刘伯芹%赵玉芳%赵仁亮
王國峰%劉伯芹%趙玉芳%趙仁亮
왕국봉%류백근%조옥방%조인량
脑缺血%再灌注损伤%缺血后处理%脑源性神经营养因子%受体,trkB%神经保护药%大鼠
腦缺血%再灌註損傷%缺血後處理%腦源性神經營養因子%受體,trkB%神經保護藥%大鼠
뇌결혈%재관주손상%결혈후처리%뇌원성신경영양인자%수체,trkB%신경보호약%대서
BrainIschemia%ReperfusionInjury%IschemicPostconditioning%Brain-Derived Neurotrophic Factor%Receptor,trkB%Neuroprotective Agents%Rats
目的:探讨脑源性神经营养因子(brain-derivedneurotrophicfactor,BDNF)和酪氨酸受体激酶B(tyrosine receptor kinase B, TrkB)在脑缺血后适应中的作用。方法 Wistar大鼠随机分为假手术组(9只)、缺血后适应组和缺血再灌注组,后2组根据再灌注时间进一步分为6、12、24、48和72 h亚组(各亚组各9只)。线栓法制作大脑中动脉脑缺血再灌注模型。应用氯化三苯基四氮唑染色法检测梗死体积(假手术组和各亚组各4只),免疫组化染色法检测BDNF和TrkB蛋白表达水平(假手术组和各亚组各5只)。结果缺血后适应组各时间点梗死体积较缺血再灌注组显著缩小[6 h:(143.3±8.7)mm3对(166.8±7.5)mm3,t=4.104,P=0.006;12 h:(151.7±7.8)mm3对(171.6±9.1)mm3,t=3.314, P=0.016;24 h:(159.2±9.3)mm3对(177.1±7.6)mm3, t=3.000, P=0.024;48 h:(166.9±9.6)mm3对(184.9±9.0)mm3, t=2.732, P=0.034;72 h:(172.0±9.1)mm3对(198.1±8.2)mm3,t=2.640,P=0.039],且高倍视野下 BDNF[6 h:(23.98±4.07)个对(18.63±2.5)个,t=2.479, P=0.038;12 h:(27.64±3.18)个对(22.01±3.14)个, t=2.817, P=0.023;24 h:(34.82±4.17)个对(28.46±4.05)个,t=2.446,P=0.040;48 h:(34.30±3.27)个对(26.29±3.26)个,t=3.872, P=0.005;72 h:(28.77±3.53)个对(23.64±3.54)个,t=2.297,P=0.051]和 TrkB[6 h:(33.83±3.90)个对(21.51±3.86)个,t=5.012,P<0.001;12 h:(38.59±4.84)个对(23.41±3.67)个,t=5.586, P<0.001;24 h:(46.07±3.06)个对(28.78±3.61)个, t=8.169, P<0.001;48 h:(47.90±3.30)个对(29.51±3.81)个,t=8.160,P<0.001;72 h:(42.78±4.07)个对(27.46±3.19)个,t=6.623,P<0.001]阳性细胞数量均显著多于缺血再灌注组。结论缺血后适应能上调脑缺血再灌注后BDNF和TrkB蛋白表达水平,缩小梗死体积,BDNF/TrkB在缺血后适应中可能发挥着重要的神经保护作用。
目的:探討腦源性神經營養因子(brain-derivedneurotrophicfactor,BDNF)和酪氨痠受體激酶B(tyrosine receptor kinase B, TrkB)在腦缺血後適應中的作用。方法 Wistar大鼠隨機分為假手術組(9隻)、缺血後適應組和缺血再灌註組,後2組根據再灌註時間進一步分為6、12、24、48和72 h亞組(各亞組各9隻)。線栓法製作大腦中動脈腦缺血再灌註模型。應用氯化三苯基四氮唑染色法檢測梗死體積(假手術組和各亞組各4隻),免疫組化染色法檢測BDNF和TrkB蛋白錶達水平(假手術組和各亞組各5隻)。結果缺血後適應組各時間點梗死體積較缺血再灌註組顯著縮小[6 h:(143.3±8.7)mm3對(166.8±7.5)mm3,t=4.104,P=0.006;12 h:(151.7±7.8)mm3對(171.6±9.1)mm3,t=3.314, P=0.016;24 h:(159.2±9.3)mm3對(177.1±7.6)mm3, t=3.000, P=0.024;48 h:(166.9±9.6)mm3對(184.9±9.0)mm3, t=2.732, P=0.034;72 h:(172.0±9.1)mm3對(198.1±8.2)mm3,t=2.640,P=0.039],且高倍視野下 BDNF[6 h:(23.98±4.07)箇對(18.63±2.5)箇,t=2.479, P=0.038;12 h:(27.64±3.18)箇對(22.01±3.14)箇, t=2.817, P=0.023;24 h:(34.82±4.17)箇對(28.46±4.05)箇,t=2.446,P=0.040;48 h:(34.30±3.27)箇對(26.29±3.26)箇,t=3.872, P=0.005;72 h:(28.77±3.53)箇對(23.64±3.54)箇,t=2.297,P=0.051]和 TrkB[6 h:(33.83±3.90)箇對(21.51±3.86)箇,t=5.012,P<0.001;12 h:(38.59±4.84)箇對(23.41±3.67)箇,t=5.586, P<0.001;24 h:(46.07±3.06)箇對(28.78±3.61)箇, t=8.169, P<0.001;48 h:(47.90±3.30)箇對(29.51±3.81)箇,t=8.160,P<0.001;72 h:(42.78±4.07)箇對(27.46±3.19)箇,t=6.623,P<0.001]暘性細胞數量均顯著多于缺血再灌註組。結論缺血後適應能上調腦缺血再灌註後BDNF和TrkB蛋白錶達水平,縮小梗死體積,BDNF/TrkB在缺血後適應中可能髮揮著重要的神經保護作用。
목적:탐토뇌원성신경영양인자(brain-derivedneurotrophicfactor,BDNF)화락안산수체격매B(tyrosine receptor kinase B, TrkB)재뇌결혈후괄응중적작용。방법 Wistar대서수궤분위가수술조(9지)、결혈후괄응조화결혈재관주조,후2조근거재관주시간진일보분위6、12、24、48화72 h아조(각아조각9지)。선전법제작대뇌중동맥뇌결혈재관주모형。응용록화삼분기사담서염색법검측경사체적(가수술조화각아조각4지),면역조화염색법검측BDNF화TrkB단백표체수평(가수술조화각아조각5지)。결과결혈후괄응조각시간점경사체적교결혈재관주조현저축소[6 h:(143.3±8.7)mm3대(166.8±7.5)mm3,t=4.104,P=0.006;12 h:(151.7±7.8)mm3대(171.6±9.1)mm3,t=3.314, P=0.016;24 h:(159.2±9.3)mm3대(177.1±7.6)mm3, t=3.000, P=0.024;48 h:(166.9±9.6)mm3대(184.9±9.0)mm3, t=2.732, P=0.034;72 h:(172.0±9.1)mm3대(198.1±8.2)mm3,t=2.640,P=0.039],차고배시야하 BDNF[6 h:(23.98±4.07)개대(18.63±2.5)개,t=2.479, P=0.038;12 h:(27.64±3.18)개대(22.01±3.14)개, t=2.817, P=0.023;24 h:(34.82±4.17)개대(28.46±4.05)개,t=2.446,P=0.040;48 h:(34.30±3.27)개대(26.29±3.26)개,t=3.872, P=0.005;72 h:(28.77±3.53)개대(23.64±3.54)개,t=2.297,P=0.051]화 TrkB[6 h:(33.83±3.90)개대(21.51±3.86)개,t=5.012,P<0.001;12 h:(38.59±4.84)개대(23.41±3.67)개,t=5.586, P<0.001;24 h:(46.07±3.06)개대(28.78±3.61)개, t=8.169, P<0.001;48 h:(47.90±3.30)개대(29.51±3.81)개,t=8.160,P<0.001;72 h:(42.78±4.07)개대(27.46±3.19)개,t=6.623,P<0.001]양성세포수량균현저다우결혈재관주조。결론결혈후괄응능상조뇌결혈재관주후BDNF화TrkB단백표체수평,축소경사체적,BDNF/TrkB재결혈후괄응중가능발휘착중요적신경보호작용。
ObjectiveToinvestigatetherolesofbrain-derivedneurotrophicfactor(BDNF)and tyrosine receptor kinase B (TrkB) in ischemic postconditioning. Methods Wistar rats w ere randomly assigned to three groups:a sham operation (9 rats), an ischemic postconditioning, and an ischemia-reperfusion group. According to the reperfusion time, the latter 2 groups w ere redivided into 6, 12, 24, 48, and 72 h subgroups (9 rats in each subgroups). A middle cerebral artery occluded by suture method for a cerebral ischemia-reperfusion model. Triphenyl tetrazolium staining w as used to detect infarct volume (P=4). Immunohisto-chemical staining w as used to detect the expression levels of BDNF and TrkB proteins (P=5). Results The infarct volumes in the ischemic postconditioning group w ere reduced significantly compared w ith those in the ischemia-reperfusion group (6 h:143.3 ±8.7 mm3 vs.166.8 ±7.5 mm3, t=4.104, P=0.006;12 h:151.7 ±7.8 mm3 vs.171.6 ±9.1 mm3, t=3.314, P=0.016; 24 h: 159.2 ±9.3 mm3 vs.177.1 ± 7.6 mm3, t=3.000, P=0.024;48 h:166.9 ±9.6 mm3 vs.184.9 ±9.0 mm3, t=2.732, P=0.034;72 h:172.0 ±9.1 mm3 vs.198.1 ±8.2 mm3, t=2.640, P=0.039), and the positive cel numbers of BDNF (6 h:23.98 ±4.07 vs.18.63 ±2.5, t=2.479, P=0.038;12 h:27.64 ±3.18 vs.22.01 ±3.14, t=2.817, P=0.023;24 h:34.82 ±4.17 vs.28.46 ±4.05, t=2.446, P=0.040; 48 h:34.30 ±3.27 vs.26.29 ± 3.26, t=3.872, P=0.005;72 h:28.77 ±3.53 vs.23.64 ±3.54, t=2.297, P=0.051) and TrkB (6 h:33.83 ±3.90 vs.21.51 ±3.86, t=5.012, P<0.001; 12 h:38.59 ±4.84 vs.23.41 ±3.67, t=5.586, P<0.001;24 h:46.07 ±3.06 vs.28.78 ±3.61, t=8.169, P<0.001; 48 h:47.90 ±3.30 vs.29.51 ± 3.81, t=8.160, P<0.001; 72 h:42.78 ±4.07 vs.27.46 ±3.19, t=6.623, P<0.001) per high-pow er field at each time point in the ischemic postconditioning group w ere significantly more than those in the ischemia-reperfusion group. Conclusions Ischemic postconditioning upregulates the expressions levels of BDNF and TrkB proteins after ischemia-reperfusion and reduces cerebral infarct volumes. BDNF/TrkB may play an important neuroprotective effect in ischemic postconditioning.