遗忘型轻度认知障碍与血管紧张素转换酶的基因多态性和血清水平关系的研究

Objective To study the relationship among amnestic mild cognitive impairment(aMCI)and the angiotensin-converting enzyme(ACE)gene polymorphism of intron 16 insertion/deletion(I/D)and serum ACE level.Methods One hundred and eighty subjects(60-85 years)were divided into aMCI group(n=90)and normal control group(n=90)through a series of neuropsychologcal evaluating.The intron 16 I/D polymorphism of ACE gene was analyzed by means of polymerase chain reaction(PCR).The serum ACE levels were measured by using ultraviolet spectrophotometry.Results The scores of neuropsychological tests in aMCI patients were significantly poorer than that in controls(all P＜0.01).The frequencies of DD genotype and D aliele of ACE gene were significantly different between aMCI patients and controls(all P＜0.01).The frequencies of DD genotype and D allele were higher in aMCI patients than controls(23%vs.16%;57%vs.43%).ACE genotype was correlated with delayed recall in Auditory Verbal Memory Test(AVMT),delay recall in Complex Figure Test,Category Fluency Test and Symbol Digit Modalities Test(all P＜0.05),in which DD and DI genotype was lower than Ⅱ genotype(P＜0.05).A significant difference in serum ACE level was observed among the three genotypes in both aMCI and control group(DD＞DI＞II;P＜0.01).AVMT-delay recall had significant correlations with serom ACE level in aMCI group(r=-0.249,P＜0.05).Conclusions The ACE gene I/D polymorphism may be correlated with aMCI,with D allele possibly being a genetic risk factor for the development of aMCI.The higher serum ACE level my possibly play a role in the episodic memory impairment of aMCI.     

遗忘型轻度认知障碍与血管紧张素转换酶的基因多态性和血清水平关系的研究

Objective To study the relationship among amnestic mild cognitive impairment(aMCI)and the angiotensin-converting enzyme(ACE)gene polymorphism of intron 16 insertion/deletion(I/D)and serum ACE level.Methods One hundred and eighty subjects(60-85 years)were divided into aMCI group(n=90)and normal control group(n=90)through a series of neuropsychologcal evaluating.The intron 16 I/D polymorphism of ACE gene was analyzed by means of polymerase chain reaction(PCR).The serum ACE levels were measured by using ultraviolet spectrophotometry.Results The scores of neuropsychological tests in aMCI patients were significantly poorer than that in controls(all P＜0.01).The frequencies of DD genotype and D aliele of ACE gene were significantly different between aMCI patients and controls(all P＜0.01).The frequencies of DD genotype and D allele were higher in aMCI patients than controls(23%vs.16%;57%vs.43%).ACE genotype was correlated with delayed recall in Auditory Verbal Memory Test(AVMT),delay recall in Complex Figure Test,Category Fluency Test and Symbol Digit Modalities Test(all P＜0.05),in which DD and DI genotype was lower than Ⅱ genotype(P＜0.05).A significant difference in serum ACE level was observed among the three genotypes in both aMCI and control group(DD＞DI＞II;P＜0.01).AVMT-delay recall had significant correlations with serom ACE level in aMCI group(r=-0.249,P＜0.05).Conclusions The ACE gene I/D polymorphism may be correlated with aMCI,with D allele possibly being a genetic risk factor for the development of aMCI.The higher serum ACE level my possibly play a role in the episodic memory impairment of aMCI.     

急性脑梗死患者外周血sE-选择素?sL-选择素水平变化及其临床意义

目的:探讨急性脑梗死患者外周血sE-选择素、sL-选择素表达水平的变化、临床意义.方法:对30例急性脑梗死患者采用酶联免疫吸附技术(EUsA)定量测定发病<72 h、7天时外周血血清sE-选择素、sL-选择素的表达水平,并与20例健康者作对照.结果:发病<72 h、7天时外周血sE-选择素的表达水平分别为(10.49±8.70)ng/ml、(5.74±4.40)ng/ml,均显著高于对照组(均P<0.01);且与发病<72 h相比,发病7天时下降明显,其差异有显著性(P<0.01).发病<72 h、7天时外周血sL-选择素的表达水平分别为(4.29±2.22)ng/ml、(4.27±2.11)ng/ml,均显著低于对照组(均P<0.01);7天与<72 h相比其表达水平差异无显著性(P0.05).结论:急性脑梗死时患者外周血sE-选择素表达上调而sL-选择素表达下调;它们可能参与了急性脑梗死的病理过程,对临床治疗有参考价值.     

选择素与缺血性脑血管病

黏附分子在炎症反应和血栓形成等病理生理学过程中起重要作用。选择素家族与缺血性脑血管病的关系密切。文章就P、E和L选择素的作用、特征、相互关系以及与缺血性脑血管病的关系做了综述。     

糖尿病并发脑梗死的病理生理学

研究发现，糖尿病患者的脑梗死发病率显著增高且预后更差。然而，糖尿病患者的卒中危险因素极为复杂。文章从葡萄糖和脂质代谢紊乱、高血压、胰岛素抵抗和高胰岛素血症、血管舒缩功能障碍、脂联素和黏附分子表达的改变以及基因多态性等方面对该领域的研究进展进行了综述。     

慢性低氧低糖培养对大鼠海马神经元α-和β-分泌酶活性的影响

目的 探讨慢性低氧低糖培养对大鼠海马神经元α-和β-分泌酶活性的影响.方法 取新生24h的wistar大鼠海马神经元培养,用慢性低氧低糖进行干预,MTT法检测神经元细胞活力,直接荧光法检测α、β-分泌酶活性.结果 低氧低糖组较对照组细胞活力降低,具有显著性差异（P＜0.05）,低氧低糖培养海马神经元12 h的α-分泌酶活性升高（P＜0.0001）,低氧低糖培养海马神经元12、24、36 h的β-分泌酶活性升高（P=0.0032、0.0018、＜0.0001）.结论 慢性低氧低糖培养对海马神经元具有毒性,可能与其升高β-分泌酶活性使具有神经营养作用的sAPPα降低和具有神经毒性作用的Aβ升高有关.     

遗忘型轻度认知障碍与血管紧张素转换酶的基因多态性和血清水平关系的研究

Objective To study the relationship among amnestic mild cognitive impairment(aMCI)and the angiotensin-converting enzyme(ACE)gene polymorphism of intron 16 insertion/deletion(I/D)and serum ACE level.Methods One hundred and eighty subjects(60-85 years)were divided into aMCI group(n=90)and normal control group(n=90)through a series of neuropsychologcal evaluating.The intron 16 I/D polymorphism of ACE gene was analyzed by means of polymerase chain reaction(PCR).The serum ACE levels were measured by using ultraviolet spectrophotometry.Results The scores of neuropsychological tests in aMCI patients were significantly poorer than that in controls(all P＜0.01).The frequencies of DD genotype and D aliele of ACE gene were significantly different between aMCI patients and controls(all P＜0.01).The frequencies of DD genotype and D allele were higher in aMCI patients than controls(23%vs.16%;57%vs.43%).ACE genotype was correlated with delayed recall in Auditory Verbal Memory Test(AVMT),delay recall in Complex Figure Test,Category Fluency Test and Symbol Digit Modalities Test(all P＜0.05),in which DD and DI genotype was lower than Ⅱ genotype(P＜0.05).A significant difference in serum ACE level was observed among the three genotypes in both aMCI and control group(DD＞DI＞II;P＜0.01).AVMT-delay recall had significant correlations with serom ACE level in aMCI group(r=-0.249,P＜0.05).Conclusions The ACE gene I/D polymorphism may be correlated with aMCI,with D allele possibly being a genetic risk factor for the development of aMCI.The higher serum ACE level my possibly play a role in the episodic memory impairment of aMCI.     

遗忘型轻度认知障碍与血管紧张素转换酶的基因多态性和血清水平关系的研究

Objective To study the relationship among amnestic mild cognitive impairment(aMCI)and the angiotensin-converting enzyme(ACE)gene polymorphism of intron 16 insertion/deletion(I/D)and serum ACE level.Methods One hundred and eighty subjects(60-85 years)were divided into aMCI group(n=90)and normal control group(n=90)through a series of neuropsychologcal evaluating.The intron 16 I/D polymorphism of ACE gene was analyzed by means of polymerase chain reaction(PCR).The serum ACE levels were measured by using ultraviolet spectrophotometry.Results The scores of neuropsychological tests in aMCI patients were significantly poorer than that in controls(all P＜0.01).The frequencies of DD genotype and D aliele of ACE gene were significantly different between aMCI patients and controls(all P＜0.01).The frequencies of DD genotype and D allele were higher in aMCI patients than controls(23%vs.16%;57%vs.43%).ACE genotype was correlated with delayed recall in Auditory Verbal Memory Test(AVMT),delay recall in Complex Figure Test,Category Fluency Test and Symbol Digit Modalities Test(all P＜0.05),in which DD and DI genotype was lower than Ⅱ genotype(P＜0.05).A significant difference in serum ACE level was observed among the three genotypes in both aMCI and control group(DD＞DI＞II;P＜0.01).AVMT-delay recall had significant correlations with serom ACE level in aMCI group(r=-0.249,P＜0.05).Conclusions The ACE gene I/D polymorphism may be correlated with aMCI,with D allele possibly being a genetic risk factor for the development of aMCI.The higher serum ACE level my possibly play a role in the episodic memory impairment of aMCI.     

急性脑梗死患者外周血CD54、CD42b的变化与临床意义

目的:探讨急性脑梗死患者外周血CD54、CD42b表达的变化、临床意义以及两指标间是否存在相关性。方法:用流式细胞仪测定29例(正常)对照者与30例急性脑梗死患者发病72h内、7天及14天时外周血CD54、CD42b的表达。结果:与对照组相比,除CD42b的表达在急性脑梗死发病14天时接近对照组外,其余各值均有显著改变,CD54表达上调而CD42b表达下调。结论:CD54、CD42b之间无相关性,是相对独立的指标;它们可能参与了急性脑梗死的病理过程,对临床治疗有参考价值。     

轻度认知功能损害患者负性情绪与脑缺血指数研究

目的:探讨轻度认知功能损害(MCI)患者负性情绪与脑缺血指数的关系。方法:用Zung抑郁自评量表(SDS)、Zung焦虑自评量表(SAS)和Hachinski缺血指数量表(HIS)对MCI组(98例MCI患者)进行测试,并与国内常模或对照组(98名健康人)比较。结果:MCI组存在明显抑郁、焦虑,SDS和SAS评分均显著高于国内常模(P<0.05,0.01);MCI组HIS评分显著高于对照组[(1.58±0.96)分,(0.64±0.74)分,P<0.05];SDS及SAS评分与HIS评分呈显著正相关。结论:MCI患者常伴有负性情绪,慢性缺血可能是MCI的高危因素,MCI患者脑缺血越明显则抑郁和焦虑症状越重。