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1.
目的:建立儿童型脊髓性肌萎缩症(SMA)的特异性基因诊断。方法:应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术,对11例临床诊断为SMA的患儿及21例正常儿童的运动神经元存活(SMN)基因进行了检测。结果:11例SMA患儿的SMN基因外显子7均有缺失。21例正常对照儿童均无SMN基因外显子7缺失。结论:应用PCR-RFLP技术对儿童型SMA患儿进行基因诊断,具有高度敏感性和特异性,简便易行。  相似文献   

2.
目的了解儿童期发作的进行性脊髓性肌萎缩(SMA)患者的运动神经元存活基因(SMN)的缺失,探讨聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法用于SMA疾病的诊断价值。方法应用PCR-RFLP方法对3例SMA可疑患儿及其父母5例的SMN1基因外显子7和8进行了检测,并对其进行基因测序。结果3例SMA可疑患儿中3例均有SMN1基因缺失,为外显子7和8联合缺失。其父母均无SMN1基因缺失。基因测序支持诊断。结论用PCR-RFLP法对高度可疑儿童型SMA的病例进行诊断,具有较高敏感性和特异性,简便易行。  相似文献   

3.
Li Q  Ma Y  Pan Q 《中华医学杂志》2001,81(23):1447-1449
目的:建立一种高效,快速的脊髓性肌萎缩(SMA)的基因诊断与产前诊断的方法。方法:基于运动神经元生存基因(SMN)基因的两个同源拷贝碱基上的差异,采用聚合酶链反应(PCR)-酶切的方法,选择特异的酶切位点对11例SMA患儿进行SMN基因检测。同时采用SMN基因内部及旁侧的C161,C171,C212,C272等4对(CA)n对4个家系进行连锁分析。结果:11例SMA患儿中10例患儿缺失SMNt7,8号外显子,1例患儿仅缺失7号外显子。4个SMA家系中有3个胎儿未发现与先证者完全相同的SMN基因片段,1个胎儿检测到与先证者完全相同的SMN基因片段。结论:该方法快速,简便,适合临床推广。  相似文献   

4.
<正>脊髓性肌萎缩(spinal muscular atrophy,SMA)是一种因脊髓前角运动神经元变性而导致的进行性肌肉无力和瘫痪的遗传性肌肉疾病,可发生于出生至成年的任何时段,婴儿期发病的患儿常引起全身肌肉无力和肌张力减低,病死率高,预后差,多数患儿最终因呼吸道感染及呼吸衰竭而死亡[1-2]。现就1例确诊为SMA的病例作一报告。1 病历摘要1.1 一般资料:患儿男,日龄2 d,因"生后反应差2 d"入院。患儿系第3胎第2产胎  相似文献   

5.
婴儿脊髓性肌萎缩是新生儿期少见病之一,现将我院收治的1例报告如下.  相似文献   

6.
目的:建立儿童型脊髓性肌萎缩症(SMA)的特异性基因诊断平台。方法:应用聚合酶链反应-限制性片断长度多态性(PCR-RFLP)技术,对10例临床诊断为SMA的患儿及15例正常个体的运动神经元存活(SMN)基因第7、第8号外显子进行检测。结果:10例SMA患儿的SMN基因第7、第8外显子全部缺失,而15例正常个体均无SMN基因第7、第8外显子的缺失。结论:应用PCR-RFLP技术对儿童型脊髓性肌萎缩症患儿进行基因诊断具有高度的敏感性和特异性,可作为SMA的诊断方法。  相似文献   

7.
8.
目的评价变性高效液相色谱(denaturing high performance liquid chromatography,DHPLC)技术在儿童型脊髓性肌萎缩症(spinal muscul aratrophy,SMA)基因诊断及携带者基因筛查中的应用价值。方法对35例临床疑诊为儿童型SMA的患者采用临床标准进行诊断。同时,应用DHPLC技术联合双重PCR对所有入选患者、临床标准确诊为SMA患者的双亲以及一份标准对照进行SMN1拷贝数检测,做出基因诊断及判断携带者。结果(1)35例入选患者,临床标准诊断确诊SMA15例,非SMA20例。(2)DHPLC技术检测35例入选患者:15例临床诊断SMA患者中,12例SMN1拷贝数为0,为纯合缺失型SMA患者;2例SMN1拷贝数为1,为杂合缺失型SMA患者;1例SMN1拷贝数为2,为非SMA。20例临床诊断非SMA者,SMN1拷贝数为2,为非SMA。(3)与临床标准诊断相比,DHPLC技术诊断SMA灵敏度为93.3%,特异度为100%。15例临床确诊为SMA患者的28名双亲中,1例SMN1拷贝数为0,6例SMN1拷贝数为2,21例SMN1基因拷贝数为1(为携带者),SMA患者双亲的携带率为75%。结论应用DHPLC技术可以检测出SMN1基因拷贝数,进行SMA基因诊断灵敏度和特异度高,适合临床应用;应用该技术可以进行携带者筛查,为遗传分析和产前诊断提供理论依据。  相似文献   

9.
成人脊髓性肌萎缩1例报告   总被引:2,自引:0,他引:2  
  相似文献   

10.
脊髓性肌萎缩(Spinal Muscular Atrophy,SMA)是指一种由于脊髓前角细胞变性导致的常染色体隐性遗传性疾病,临床上表现为进行性、对称性,肢体近端为主的广泛性迟缓性麻痹与肌萎缩。智力发育及感觉均正常。我科自2001年6月-2005年3月门诊及住院部共诊治5例SMA患儿,现报告如下。  相似文献   

11.
Childhood onsetspinalmuscularatrophy(SMA)isoneofthemostcommonautosomalrecessivegeneticdisorderscharacterizedby degenerationoftheanteriorhorncellsofthespinal cord1andprogressivesymmetricallimbmuscle atrophyandweakness.Thediseaseaffects1in6000to10000newborns2,3and1in40to60individualcarriers.3Severepatientswiththis diseasewilldieofrespiratorymuscleparalysis,and afewsurvivorsdevelopdyskinesia.Twocandidate geneshavebeenisolatedanddetectedinSMA patients:thesurvivalmotorneuron(SMN)gene andtheneur…  相似文献   

12.
13.
Spinal muscular atrophy (SMA) is a common Pautosomal recessive neuromuscular disorder (1in 6000 to 10 000 births) caused by mutations in the SMN1 gene at 5q13. More than 90%-98% of SMA patients show homozygous deletion of SMN1, which has proved to be useful in the diagnosis of SMA. But it is hampered because of the existence of a highly homologous gene, SMN2. Based on nucleotide mismatches between SMN1 and SMN2, the following two DNA tests are usually performed: single-strand conformational polymorphism (SSCP) and polymerase chain reaction (PCR) followed by a restriction enzyme digestion.In this study we developed a new method for rapid genetic diagnosis of SMA by denaturing high-performance liquid chromatography (DHPLC), which is based on different retention of homoduplexes and heteroduplexes in detecting the homozygous deletion of SMN1. Both genetic and prenatal diagnoses were performed successfully for a SMA family by DHPLC, which was confirmed as a rapid and effective technique for detecting the deletion of SMN1.  相似文献   

14.
目的:研究中国人群中进行性脊髓性肌萎缩症(spinal muscular atrophy,SMA)患者中神经元存活基因(survival motor neuron,SMN)外显子7及神经元调亡抑制蛋白基因(neuronal apoptosis inhinbitory protein gene,NAIP)外显子5缺失情况,进一步探讨这2个SMN基因外显子7区域和55例患儿NAIP基因外显子5的缺失进行检测。结果:SMN基因外显子7区域纯合缺失率分别为:SMAI型92%(23/25);Ⅱ型90%(27/30)。患儿双亲中有2例母亲的1例父亲也有纯合缺失。在55例SMA患儿中未检测到有NAIP基因外显子5的纯合缺失,仅发现2例杂合性缺失。结论:中国人SMA患者中SMN  相似文献   

15.
Spinalmuscularatrophy (SMA)isanautosomalreces siveneuromusculardegenerationoftheanteriorhorncellsofthespinalcordandbrainstem .Thisdegenerationresultsinoneofthemostcommondiseasesrelatedtomusclefatigueandatrophy[1] .SMAdiseasesareclassifiedintofourcategorie…  相似文献   

16.
Objective: Spinal muscular atrophy(SMA), an autosomal recessive neuromuscular degen-eration of the anterior horn ceils of the spinal cord and brain stem, results in one of the most common dis-eases with muscle fatigue and atrophy. Most SMA cases including all the types are due to the homozygous deletion of at least exon 7 within the survival motor neuron 1 (SMN-1) gene. Although a ““golden stand-ard““ assay ( PCR with mismatch primer followed by enzyme digestion) is very reliable for the identifica-tion of homozygous SMN-1 deletion, the carrier detection of heterozygous SMN-1 deletion remains a chal-lenge. Methods: Some PCR-based gene dosage assays or multiplex PCR allow for the determination of the copy number of SMN-1 gene to identify heterozygous deletion, but these procedures are often time consuming and available on a limited clinical basis. Recently developed MLPA (multiplex ligation-de-to establish the copy number of the SMN gene. We performed a validation for simultaneous detection of homozygous SMN-1 deletions of SMA patients and heterozygous SMN-1 deletions of SMA carriers in a sim-ple assay using a MLPA-SMA assay specific reagent. Results: Six out of 20 patients with SMA were found to have homozygous SMN-1 deletion, confirmed by the PCR/digestion assay. All 4 parents of the children with SMA had heterozygous SMN-1 deletion, confirmed by an independent relative quantitative analysis. Conclusion: MLPA provides a simple, rapid and accurate method of simultaneously detecting homozygous deletions and heterozygous deletions in a sinzle assay for both SMN-1 and SMN-2 zenes.  相似文献   

17.
目的:建立儿童型脊髓性肌萎缩症(CSMA)的特异性产前基因诊断平台.方法:通过应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术,首先对7例家系中的CSMA先证者进行基因诊断,并检测到其运动神经元存活基因(SMNt)第7、8外显子全部缺失,然后抽取孕妇羊水,盐析法提取羊水中的胎儿DNA,运用PCR-RFLP方法对胎儿SMNt基因第7、8外显子进行检测.结果:1例胎儿的SMNt基因第7、8外显子缺失,提示其为CSMA患者;其余6例胎儿均无SMNt基因第7、8外显子的缺失,提示为正常胎儿,且出生后检测为正常.结论:应用PCR-RFLP技术对有CSMA家族史的家系进行产前基因诊断具有高度的敏感性和特异性,可作为CSMA可靠的产前诊断方法.  相似文献   

18.
目的探讨成年起病的脊肌萎缩症(SMA)患者的运动神经元存活基因SMN的缺失情况。方法用聚合酶链反应-酶切技术对15例SMA病人及33例正常对照的外显子7进行检测,明确有无缺失。结果3例SMA的SMN基因外显子7纯合缺失,其余12例和对照组均阴性。结论SMN基因外显子7缺失可作为成年起病SMA的辅助诊断,以提示SMA遗传的异质性。  相似文献   

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