血红素加氧酶-1基因多态性,神经元特异性烯醇化酶与脑梗死关系的研究

目的 探讨血红素加氧酶-1基因启动子区域GT重复序列[HO-1(GT)n]遗传多态性,神经元特异性烯醇化酶(NSE)与脑梗死的遗传易感性的关系.方法 采用巢式PCR法检测HO-1(GT)n,酶联免疫吸附法(ELISA)检测血清NSE,分析55例急性脑梗死(ACI组)患者和56例对照者的外周血样本.结果 ACI组短GT重复序列分布43.64%明显低于对照组64.29%,差别有统计学意义.在急性脑梗死患者治疗前后均显示短GT重复序列组NSE水平低于长GT重复序列组NSE水平.结论 HO-1基因启动子短重复序列脑梗死患者血清NSE水平较低,HO-1短GT重复序列遗传多态性可能与脑梗死的遗传易感性有关.

Abstract：

Objective To investigate the interrelation between genetic polymorphism of Heme oxygenase-1 genic repeated sequence in promoter region( HO-1 (GT) n) and serum levels of neuron-specific enolase(NSE) in hereditary susceptibility of cerebral infarction. Methods The information and peripheral blood sample came from 55 acute cerebral infarction (ACI group)and 56 healthy people as control group were collected. HO-1 (GT)n was detected by PCR,and NSE was detected by ELISA. Results The number of HO-1 genotype with S allele was significantly different between the ACI group (43.64%) and control group(65.45% ). The level of serum NSE before treatment in ACI-group was significantly different with that of after treatment ACI-group and control group ( P < 0.05 ). Conclusion The ACI patients whose HO-1 genotype with S allele have lower level of serum NSE than the ACI patients whose HO-1 genotype without S allele, and neuron was less damaged. The less repetitive sequence exhibits a reduced risk for ACI.     

流行性乙型脑炎112例临床分析

目的分析流行性乙型脑炎(乙脑)的临床表现与临床流行病学规律,明确该病有效预防措施。方法2003年5月至2007年12月治的112例乙脑的临床资料,观察其临床流行病学特点及临床特征。结果本组112例患者均为儿童,男63例,女49例,年龄4岁～12岁,平均年龄为4.65±0.75岁,其中89(79.46%)例为爆发流行病例,23(20.53%)例为散发流行病例,103(91.96%)例没有乙脑疫苗接种史。以急性起病,高热,头痛、多数患者有意识障碍(96例,85.71%)及癫痫发作(61例,54.46%),发病第二周血清或脑脊液乙脑IgM阳性。本组患者81(72.32%)例临床治愈,18(16.07%)例住院期间死亡。结论本病的临床特征主要为儿童罹患,发热、头痛为常见的临床表现,发病第二周血清或脑脊液乙脑IgM阳性,重症患者死亡率高,而夏秋季发病为其主要临床流行病学特点。乙脑疫苗注射仍是目前主要行之有效的预防措施。     

经颅多普勒超声检测缺血性脑血管病患者颅内血管病变的价值

目的 应用经颅多普勒(TCD)检测缺血性脑血管病患者颅内血管病变情况,为临床提高诊断的准确性提供参考.方法 采用TCD技术检测104例缺血性脑血管病患者(脑梗死、腔隙性脑梗死、TIA)的颅内血管情况,记录颅内动脉的收缩期血流速度(Vs)、搏动指数(PI)等参数.结果 TCD检测到的血管狭窄以MCA为主,其次是TICA;未见明显狭窄的患者,脑血流情况主要为前循环血流增高或椎基底动脉血流减慢;各组病人脑动脉硬化频谱改变比例均高.结论 TCD是诊断颅内脑血管狭窄准确性较高的无创性检查方法.     

Parkin基因启动子区-258T/G多态性与广西地区散发性帕金森病的相关性分析

目的 探讨广西地区parkin基因启动子区-258T/G多态性与散发性帕金森病(sporadicParkinson's disease,SPD)的相关性及该多态性与PD发病年龄的关系.方法 PCR-RFLP及DNA测序等技术,分析parkin基因-258T/G多态性在PD患者和健康对照者间分布频率的差异.结果 PD组parkin基因-258T/G多态性位点G等位基因频率显著高于正常对照组(55.20%:43.33%,x2=6.898,P<0.05,OR=1.61,95%CI:1.13～2.30);GG基因型频率显著高于对照组(28.00%:18.33%,x2=7.159,P<0.05,OR=2.75,95%CI:1.31-5.77).同时,TG+GG基因型频率亦显著高于对照组(82.40%:68.33%,x2=6.551,P<0.05,OR=2.17,95%CI:1.20～3.93).50岁及50岁以上发病患者G等位基因频率和GG基因型频率显著高于对照组,50岁以下发病患者各频率虽高于正常对照组但差异无统计学意义.结论 Parkin基因核心启动子区-258T/G多态G等位基因可能增加了广西地区PD发病风险,且与PD发病年龄成正相关.     

Parkin基因启动子区-258T/G多态性与广西地区散发性帕金森病的相关性分析

Objective To investigate the association between the-258T/G polymorphism.in the pro-moter of parkin gene and the risk for sporadic parkinson's disease (SPD) in Guangxi Province, and in relationto the age of onset, of PD patients. Methods PCR-RFLP and sequence analysis were used to determine thegenotype of-258T/G polymorphism between all patients and healthy controls. Results The G allele was morecommon in patients than controls (55.20%:43.33% ,x2=6.898, P<0.05, OR=1.61, 95% CI: 1.13 ～2.30). The frequency of GG genotype was higher in patients than in controls (28.00 %: 18.33%, x2=7.159, P<0.05, OR=2.75, 95% CI : 1.31 ～ 5.77). The frequency of TG + GG genotype was higher in pa-tients than in controls (82.40%:68.33%, x2=6.551, P<0.05, OR=2.17.95%CI: 1.20 ～3.93). Afterbeing stratified by onset age, the frequencies of the G allele and GG genotype were significantly higher in pa-tients with onset age over 50 years than those in controls respectively. On the other hand, the frequency was notsignificantly different between the younger onset PD patients and the controls. Conclusion The parkin promot-er-258T/G polymorphism might be a risk factor for PD in Guangxi Province, and the G allele was increasedwith increasing age.     

颈动脉系统TIA病人血液流变学和脑血流速度的改变

目的　探讨颈内动脉系统短暂性脑缺血发作 (TIA)病人的血液流变学和脑血流速度的改变及其临床意义。方法　 6 0例颈内动脉系统 TIA病人均在末次发作后 2 4h内进行血液流变学和脑血流速度测定。结果　 1病人组的全血粘度、血浆粘度、红细胞压积及红细胞聚集性各指标均明显增高 ,与正常对照组比较有显著性差异 ;2绝大多数患者脑动脉有严重狭窄或痉挛存在 ,从而引起脑血流速度的改变。结论　血液粘度增高、颅内动脉的狭窄或痉挛引起的血流动力学障碍是导致颈内动脉系统短暂性脑缺血发作的两种机理     

星形胶质细胞对神经干细胞分化的影响

目的:研究表明,星形胶质细胞产生一系列可溶性因子和膜相关因子,对中枢神经系统的发育和功能的成熟起了重要的作用。将星形胶质细胞和神经干细胞在互不接触的情况下进行共培养,探讨星形胶质细胞对神经干细胞分化的影响。方法:实验于2005-03/2006-02在广西医科大学实验中心完成。①实验材料:生后0～2d新生SD大鼠由广西医科大学实验动物中心提供。②实验方法:分离培养新生大鼠海马神经干细胞。采用化学法、差速贴壁法和振荡法分离纯化新生大鼠脑组织星形胶质细胞,以胶质纤维酸性蛋白标记星形胶质细胞,应用免疫细胞化学染色法进行细胞纯度鉴定。将星形胶质细胞和神经干细胞在互不接触的情况下进行共培养:共培养组是将培养瓶中的星形胶质细胞用胰蛋白酶消化成单细胞悬液,加入完全培养液,待细胞均匀长满后,换神经干细胞基础培养液,孵育24h后,将涂有多聚赖氨酸的盖玻片放入6孔板中,将传代1个月的神经干细胞球种到盖玻片上,同时更换神经干细胞基础培养液继续培养。对照组是单纯接种神经干细胞球于置有多聚赖氨酸涂布盖玻片的6孔培养板内。③实验评估:采用免疫细胞化学染色法观察神经干细胞分化后神经元特异性烯醇化酶、胶质纤维酸性蛋白和酪氨酸羟化酶表达。结果:纯化的星形胶质细胞胶质纤维酸性蛋白抗体标记阳性,细胞纯度达95%。星形胶质细胞与神经干细胞共培养时,神经干细胞贴壁分化加快,神经元特异性烯醇化酶阳性细胞及酪氨酸羟化酶阳性细胞明显多于对照组(P<0.05)。结论:星形胶质细胞可诱导神经干细胞向神经元细胞,包括多巴胺神经元细胞分化,提示星形胶质细胞支持神经元发生,可能是星形胶质细胞及其分泌的因子维持并延长了神经元存活,降低了凋亡比率所致。     

干细胞移植治疗帕金森病的研究进展

帕金森病(PD)是一种常见的神经系统变性疾病,其病理改变的最大特点是病变只侵犯中脑的多巴胺(DA)能神经元,导致纹状体内DA的减少从而引起运动迟缓,静止性震颤,肌肉强直等锥体外系症状。自20世纪90年代初开始应用胎儿脑组织移植治疗PD以来,已有大约350例患者接受了胎脑移植手术[     

Parkin基因启动子区-258T/G多态性与广西地区散发性帕金森病的相关性分析

Objective To investigate the association between the-258T/G polymorphism.in the pro-moter of parkin gene and the risk for sporadic parkinson's disease (SPD) in Guangxi Province, and in relationto the age of onset, of PD patients. Methods PCR-RFLP and sequence analysis were used to determine thegenotype of-258T/G polymorphism between all patients and healthy controls. Results The G allele was morecommon in patients than controls (55.20%:43.33% ,x2=6.898, P<0.05, OR=1.61, 95% CI: 1.13 ～2.30). The frequency of GG genotype was higher in patients than in controls (28.00 %: 18.33%, x2=7.159, P<0.05, OR=2.75, 95% CI : 1.31 ～ 5.77). The frequency of TG + GG genotype was higher in pa-tients than in controls (82.40%:68.33%, x2=6.551, P<0.05, OR=2.17.95%CI: 1.20 ～3.93). Afterbeing stratified by onset age, the frequencies of the G allele and GG genotype were significantly higher in pa-tients with onset age over 50 years than those in controls respectively. On the other hand, the frequency was notsignificantly different between the younger onset PD patients and the controls. Conclusion The parkin promot-er-258T/G polymorphism might be a risk factor for PD in Guangxi Province, and the G allele was increasedwith increasing age.     

颈动脉系统TIA的血流动力学与发病机制初探

目的 探讨颈内动脉系统短暂性脑缺血发作（TIA）患者的血流动力学与发病的关系。方法 84例颈内动脉系统TIA患者均在末次发作后24h内进行经颅多谱勒（TCD）和血流动力学指数（CVDI）测定。结果 （1）TCD显示绝大多数患者脑动脉有严重狭窄或痉挛存在,从而引起脑血流速度的改变。（2）患者组与对照组CV-DI比较,零压顺应性（Co)明显下降,脑血管阻力（R）,特性阻抗（ZC）、脉搏波波速（WV）,动态阻力（DR）,临界压力（CP）增高,具有统计学意义,病灶侧与健侧比较,Co的下降及R、DR的增高具有统计学意义。结论 血流动力学的障碍是引起颈内动脉系统短暂性脑缺血发作的机制之一。