神经元核心抗原和神经元特异性烯醇化酶在人胚胎小肠发育阶段的表达

 目的：探讨神经元核心抗原（neuronal nuclear antigen,NeuN）和神经元特异性烯醇化酶(neuron-specific enolase, NSE)在人胚胎小肠发育阶段的分布规律及其表达意义。方法：应用免疫组织化学法检测第2~4月龄段共16例人胚胎小肠壁细胞NeuN和NSE的表达、分布状况。结果：第2~4月胎龄段,NSE在人胚胎小肠肌间神经丛内的神经元及神经纤维均呈强阳性表达,在黏膜下层,随着胎龄的增大,NSE阳性表达细胞和纤维数量逐渐增多,在肠腺内均有少量散在分布的NSE阳性细胞;在黏膜层的腺体和上皮组织内均有散在的NeuN阳性细胞分布,随着胎龄的增大,NeuN阳性细胞数量增多;在肌间神经丛,第3月龄段开始,有少量NeuN阳性细胞,随着胎龄的增大, NeuN阳性细胞数量逐渐增多;在黏膜下层,未见NeuN阳性细胞分布。结论: 人胚胎小肠发育阶段,NeuN和NSE在小肠壁的阳性表达和分布不一致,均参与小肠壁神经元及神经内分泌细胞的发育过程。     

癫痫患儿血清神经元特异性烯醇化酶水平变化及临床意义

目的　研究癫痫患儿癫痫发作后血清神经元特异性烯醇化酶 (NSE)的变化。方法　采用放射免疫分析法对11例癫痫患儿发作后 4 8h内血清中NSE进行测定 ,并与 2 2例正常组进行对照。结果　 2 2例正常对照组血清中NSE进行测定值为 (6 .4 6± 3.35 ) μg/L ,癫痫发作组血清中NSE为 (17.4 5± 10 .1) μg/L ,两组比较有显著性差异 (P≤ 0 .0 1)。结论　癫痫发作组NSE水平明显高于正常对照组 ,提示癫痫发作后有一定程度的脑神经元损害。     

神经元特异性烯醇化酶酶联免疫吸附分析技术在体外培养神经元中的应用

ＭＴＴ法是用于反映体外培养神经细胞活性的指标，但对检测细胞活性没有特异性。本实验结合神经元特异性烯醇化酶免疫细胞化学技术特异性强、敏感谢性高的优点与酶联免疫吸附试验酶促底物邻苯二胺呈色形成弥散的可溶性有色产物，通过检测有色溶液的ＯＤ值来比较体外培养过程中神经细胞的活性以及相应的数目，在建立此方法的同时并用此方法检测了人胚脊髓提取液对神经细胞活性的影响。结果证明：分子量小于１０ｋＤ的人胚脊髓提取对体     

脑外伤患者血清神经元特异性烯醇化酶测定及临床意义

为了探讨神经元特异性烯醇化酶 (ＮＳＥ)在脑外伤中的临床意义 ,从生化指标方面进一步了解脑外伤对脑实质的损害程度 ,我们测定了 79例脑外伤患者ＮＳＥ含量。现将结果报告如下。对象和方法一、对象 :急性脑外伤患者 79例 (男 5 1,女 2 8) ,年龄 2 0～6 8岁 ,均经临床确诊。根据我国第八届外科学会制定的分类方法 ,分为轻型 34例 ,中型 30例 ,重型 15例。对照组为健康体检人员 46名 ,无心血管疾病、脑梗塞、脑出血、糖尿病、肝肾疾病等。二、方法 :病人入院后取静脉血 2ｍｌ,分离血清 ,置 - 2 0℃保存待用。ＮＳＥ试剂盒由北京北方生物技术…     

急性脑梗塞患者血清神经元特异性烯醇化酶测定的意义

烯醇化酶 (Ｅｎｄａｓｅ)是参与糖酵解的关键酶 ,由α、β、γ三种亚基以二聚体形式组成五种同工酶 ,其中γγ型特异地存在于神经元和神经内分泌细胞中 ,称为神经元特异性烯醇化酶 (Ｎｅｕｒｏｎｓｐｅｃｉｆｉｃｅｎｏｌａｓｅ ,ＮＳＥ) ,ＮＳＥ占脑内全部可溶性蛋白的 1.5 % [1] ,而正常体液中含量甚微。近年来 ,ＮＳＥ作为神经元损伤的敏感性和特异性标志其与中枢神经系统疾病的关系已引国内外学者的极大关注 ,为探讨急性脑梗塞 (ＣＩ)患者血清ＮＳＥ变化的临床意义 ,现作如下探讨。资料和方法一、资料 :(一 )患者组 :42例 (男 2 7,女 15…     

神经烯醇化酶、突触素和神经纤维丝蛋白在人胚胎心脏组织中的表达

目的探讨神经烯醇化酶(NSE)、突触素(SYN)和神经纤维丝蛋白(NF)在人胚胎心脏组织不同发育阶段的分布特征。方法应用免疫组织化学法,检测第2~4个月胎龄段共16份人胚胎心脏组织内NF、NSE和SYN蛋白的表达,分析其变化规律。结果第2~4个月龄段,NF、NSE和SYN蛋白在人胚胎心脏组织内均有阳性表达。随着胎龄的增大,NF、NSE和SYN在心脏组织内阳性表达强度值逐渐降低。第2个月龄时,NSE、NF和SYN蛋白呈少量阳性表达,阳性表达强度值分别是86.79±7.75、133.03±13.61和114.32±11.12。第3个月龄时,NSE、NF和SYN阳性表达强度值分别是81.89±9.62,119.91±11.70和93.13±13.63。第4个月胎龄时,NSE、NF和SYN阳性表达强度值分别是72.18±11.97,107.02±10.89和91.17±13.81。应用One-Way ANOVA和LSD-t统计学分析第2~4个月龄段人胚胎心脏组织内NSE、NF和SYN蛋白的各自阳性表达强度值,P0.05。结论第2~4个月龄段,NSE、NF和SYN均在人胚胎心肌组织内表达和呈现特定的分布规律,随胎龄增大,心肌组织内NF、NSE和SYN的表达强度逐渐增强。     

神经元特异性烯醇化酶在新生儿HIE及高压氧治疗的临床研究

目的：动态观察神经元特异性烯醇化酶在新生儿缺氧缺血性脑病（HIE）时及高压氧治疗前后水平的变化，以探讨在临床中的意义。方法：应用双抗体夹心法测定HIE病人于入院24h,3d,5d及高压氧治疗前后血清中NSE浓度与对照组比较。结果（1）ME患者24h,3d时血清NSE水平显著高于对照组，P＜0．05，5d时与对照组无差异，P＝0．756。（2）24h血清NSE含量显著高于3d,5d,P=0.0002,3d时血清NSE含量显著高于5d,P=0.038。（3）高压氧治疗后血清中NSE含量显著降低，P＝0．027，结论（1）HIE时血清中NSE含量明显增高，且其升高程度与病情危重程度密切相关。（2）高压氧对治疗HIE有较好的效果，且可改善预后，但一个疗程以不超过五次为宜。     

神经元特异性烯醇化酶光激化学发光免疫分析法的建立

研制检测人血清神经元特异性烯醇化酶(NSE)的光激化学发光免疫分析(AlphaLISA)快速检测试剂盒。采用受体微球用一株NSE单克隆抗体包被,用生物素标记一株单克隆抗体,与链霉亲和素的供体微球共同组成检测试剂盒,优化反应体系并对试剂盒的各项性能指标进行评价。结果显示:自制NSE试剂盒灵敏度为0.149 ng/ml,线性范围为0.149~600ng/ml,分析内、分析间的精密度分别为3.7%~4.3%、3.9%~5.2%,与细胞角蛋白19片段(CYFRA21-1)、非神经元性烯醇化酶(NNE)均无交叉反应,154份临床血清样本用本试剂盒与罗氏化学发光试剂盒检测,其相关系数为0.979。发现自制NSE-AlphaLISA试剂盒的各项性能指标均能达到临床检测要求,可用于临床血清样本NSE浓度的测定。     

血清神经元特异性烯醇化酶对小细胞肺癌的诊断价值探讨

肺癌是最常见的恶性肿瘤之一 ,而其中小细胞肺癌恶性程度最高、转移较早 ,据文献报道 ,临床确诊时 ,约 5 0 %已有远处转移。但小细胞肺癌 (ｓｍａｌｌｃｅｌｌｌｕｎｇｃａｎｃｅｒ,ＳＣＬＣ)对放疗较为敏感 ,早期诊断、早期治疗可延长病人生存期。为探讨血清神经元特异性烯醇化酶 (ｎｅｕｒｏｎｓｐｅｃｉｆｉｃｅｎｏｌａｓｅ,ＮＳＥ)对ＳＣＬＣ患者的诊断价值 ,我们应用放射免疫分析法对 2 9例小细胞肺癌患者及 4 0例正常人血清进行了ＮＳＥ的检测。材料和方法一、临床资料 :(一 )小细胞肺癌 (ＳＣＬＣ)组 :2 9例 (男 2 1,女 8) ,年龄 2 …     

增殖性细胞核抗原和c-Fos蛋白参与调控人胚胎脊髓的发育

Objective To explore effects of proliferating cell nuclear antigen (PCNA)and c-Fos protein on the early and middle embryonic development of the human spinal cord. Methods Using immunohistochemical method, the expression of PCNA and c-Fos were investigated in the central canal, anterior horn and posterior horn of spinal cord of 16 human embryos aged at the second to fourth month of gestation. Results At the second month of gestation, there were the positive PCNA immunohistochemical reaction in the central canal and alar plate of the spinal cord, but not in the basal plate. The c-Fos immunohistochemical positive reaction were localized in the epithelial cells of the central canal, alar plate and basal plate of the spinal cord. Following growth, the positive immunohistochemical staining for PCNA was also found in the epithelial cells of the central canal, anterior horn, and posterior horn of the spinal cord. The average intensity and cell number of the c-Fos immunohistochemical positive profiles decreased first, and then increased in spinal cord anterior horn (EM>P /EM><0.01), but no changes was found in the posterior horn of the spinal cord. Conclusion PCNA and c-Fos proteins may regulate the growth and development of the neuroepithelial cells of the neural tube of the human embryo.     

微管相关蛋白2和巢蛋白在人胚胎脊髓的表达

目的 探讨微管相关蛋白2(MAP-2)和巢蛋白在人胚胎脊髓发育阶段的分布规律及其表达意义.方法 应用免疫组织化学法,检测第2、3、4月龄段共16例人胚胎脊髓前角、中央管及后角中MAP-2和巢蛋白的表达、分布状况.结果 第2～4个月龄段,人胚胎脊髓内均可见巢蛋白表达阳性的神经纤维分布,随着胎龄的增大,脊髓前角处巢蛋白阳性...     

神经纤维丝蛋白、神经烯醇化酶和突触素在人胚胎舌组织中的表达

目的 探讨神经纤维丝蛋白（NF）、神经烯醇化酶(NSE)和突触素(SYN)在人胚胎舌组织不同发育阶段的分布特征。 方法 应用免疫组织化学法,检测第2～4个月胎龄段共16份人胚胎舌组织内NF、NSE和SYN蛋白的表达,分析其变化规律。 结果 第2～4个月龄段,NF、NSE和SYN蛋白在人胚舌组织内均有阳性表达。随着胎龄的增大,NF、NSE和SYN在舌组织内阳性表达数量增多,表达强度逐渐增强。第2个月龄时,NF、NSE和SYN蛋白呈少量弱阳性表达,阳性表达强度值分别是135.83±24.62、136.57±15.23和139.84±21.40。第3个月龄时,NF、NSE和SYN阳性表达强度值分别是96.04±23.37、94.89±22.52和90.65±21.08。第4个月胎龄时,NF、NSE和SYN阳性表达强度值分别是79.02±20.90、76.78±21.27和83.43±25.90。应用 One-Way ANOVA和 LSD-t统计学方法,分析第2～4个月龄段人胚胎舌组织内NF、NSE和SYN蛋白的各自阳性表达强度值,P＜0.01。 结论 第2～4个月龄段,人胚胎舌组织内NF、NSE和SYN的表达强度值随胎龄增大而降低,它们均参与调控人胚胎舌内神经系统和舌肌的分化发育。     

Distribution of neurofilament protein and neuron-specific enolase in peripheral neuronal tumours

Summary Peripheral neuronal tumours were studied by the peroxidase-antiperoxidase (PAP) method for the presence of the neurofilament protein (NFP) and neuron-specific enolase (NSE). All cases of ganglioneuromas and ganglioneuroblastomas were positive for NFP and NSE. Both markers were observed only in tumour cells showing differentiation towards ganglion cells. Of the 14 cases of neuroblastoma, 8 were positive for NFP and 12 were positive for NSE. NSE was detected in most neuroblastic tumour cells. However, NFP was found in neuroblasts with signs of differentiation, such as nuclear enlargement, but not in immature, small round cells. NFP was present in cell bodies as well as in cytoplasmic processes of partially differentiated neuroblasts. The majority of pseudorosettes showed no NFP stain. Thus, antibodies against both NFP and NSE are useful in the diagnosis of peripheral neuronal tumours. Moreover, the presence of NFP seemed to be related to the degree of tumour cell differentiation.     

Immunocytochemical reactivity of breast cancer tissue with antibodies to neuron-specific enolase and an adenocarcinoma-associated glycolipid antigen

Summary The immunocytochemical reactivity of breast cancers to antibodies raised against neuron-specific enolase (NSE), carcinoembryonic antigen (CEA) and an adenocarcinoma-associated glycolipid antigen (IR-14) was studied in relation to the long-term outcome of the neoplastic disease.The patients whose tumours exhibited reactivity with the IR-14 and anti-NSE antibodies had a considerably better 5-year and long-term survival than those without such reactivity. Assessment of DNA-ploidy of the tumour cells was also relevant for long-term prognosis, immunohistochemistry giving additional prognostic information among aneuploid tumours. Reactivity with polyclonal CEA antibodies was of no prognostic value.It is suggested that tumors carrying the IR-14 reactive epitope, which was originally isolated from circulating antigen-antibody complexes, might evoke a favourable immune response and thus improve the survival of the patient.     

nNOS、VEGF和Bcl-2蛋白在人胚胎发育中脊髓前角的表达及意义

目的 探讨神经元型一氧化氮合酶(nNOS)、血管内皮生长因子(VEGF)和B细胞淋巴瘤/白血病-2(Bcl-2)蛋白在人胚胎发育早期脊髓前角中的分布规律及其表达意义. 方法 应用免疫组织化学法检测第2、3、4月龄段,人胚胎脊髓前角中nNOS、VEGF和Bcl-2蛋白的表达. 结果 在第2～4个月龄段,nNOS和Bcl-2蛋白在人胚胎脊髓前角组织细胞中由弱阳性表达逐渐变为阳性表达.在第2个月龄段,VEGF蛋白在人胚胎脊髓前角组织中均呈阴性表达;第3～4个月龄段,VEGF蛋白在人胚胎脊髓前角组织细胞中由弱阳性表达逐渐变为阳性表达. 结论 nNOS、Bcl-2和VEGF蛋白与人胚胎脊髓前角神经元的生长发育关系密切.     

Cell death in developing human spinal cord

Cell death in the developing human spinal cord was investigated in 5–12 week human conceptuses using immunohistochemical and TUNEL methods. Expression of pro-apoptotic (Fas-receptor, caspase-3) and anti-apoptotic (bcl-2) markers and marker for internucleosomal fragmentation (TUNEL) were analysed in the cranial and caudal parts of the human spinal cord. In early developmental stages (5–6 weeks) of the cranial spinal cord, bcl-2 positive cells were seen in the ventricular zone and in the roof plate, while in the caudal part they were seen surrounding the central lumen. Subsequently, bcl-2 expression appeared in the basal plates of the grey matter and in the spinal ganglia, and from the seventh week on they also appeared in the intermediate horn of the grey matter. In the fetal period, bcl-2 expression appeared in the dorsal horns of the grey matter (9 weeks) but ceased in the ventricular zone (12 weeks) . In the trunk region, TUNEL-positive cells were found in ventricular and mantle zones along the whole length of the spinal cord. Caspase-3 positive cells and Fas-receptor positive cells appeared only in the grey matter of the cranial segments (head and trunk) of the spinal cord, but they were missing in the caudal parts. Caspase-3 dependant pathway, probably activated by Fas-receptor, seems to operate only in the cranial part of the human spinal cord. In the caudal (sacrococcygeal and tail) parts, cells seem to die by caspase-3 independent pathway. The interplay of pro-apoptotic and anti-apoptotic factors may be associated with cranial spinal cord morphogenesis, adjustment of cells number and selective survival of neurons, while in the caudal regions these factors cause massive cell death associated with regression of the caudal spinal cord.