دورية أكاديمية
两个伴皮层下囊肿的巨脑性白质脑病家系的产前诊断 ; Prenatal diagnosis of two families with megalencephalic leukoencephalopathy with subcortical cysts
| العنوان: | 两个伴皮层下囊肿的巨脑性白质脑病家系的产前诊断 ; Prenatal diagnosis of two families with megalencephalic leukoencephalopathy with subcortical cysts |
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| المؤلفون: | 曹彬彬, 延会芳, 谢涵, 郭芒芒, 吴晔, 杨慧霞, 潘虹, 陈俊雅, 孙瑜, 吴希如, 姜玉武, 王静敏 |
| المساهمون: | 100034,北京大学第一医院儿科, 10003北京大学第一医院儿科, 10005首都医科大学附属北京天坛医院儿科, 100034,北京大学第一医院妇产科, 100034,北京大学第一医院实验中心 |
| المصدر: | CSCD ; 万方 ; http://d.g.wanfangdata.com.cn/Periodical_zhwcyxzz201703005.aspxTest |
| بيانات النشر: | 中华围产医学杂志 |
| سنة النشر: | 2017 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | 伴皮层下囊肿的巨脑性白质脑病, 遗传性白质脑病, 膜蛋白质类, 产前诊断, Megalencephalic leukoencephalopathy with subcortical cysts, Genetic leukoencephalopathy, Membrane proteins, Prenatal diagnosis |
| الوصف: | 目的 对2个基因诊断明确的伴皮层下囊肿的巨脑性白质脑病(megalencephalic leukoencephalopathy with subcortical cysts,MLC)家系进行遗传咨询和产前分子诊断. 方法 先证者1和2分别于2011年6月和2009年6月在北京大学第一医院儿科就诊,采集先证者及其父母外周静脉血提取基因组DNA,采用DNA测序技术进行MLC1基因检测.先证者之母再次妊娠后,分别通过羊膜腔穿刺(孕21周+4,胎儿1)和绒毛穿刺(孕12周+3,胎儿2)采集羊水及绒毛标本.提取胎儿基因组DNA,应用DNA直接测序技术检测胎儿是否具有与先证者一致的MLC1基因突变类型,并通过聚合酶链反应技术扩增Y染色体性别决定区以及X染色体微卫星标记(AR、DXS6807和DXS6797)进行单体型分析判断胎儿羊水/绒毛中是否有母体细胞污染.胎儿出生后进行验证及电话随访. 结果 先证者l和2具有大头、运动发育落后及典型MLC头颅MRI表现,符合MLC的临床诊断.先证者1MLC1基因检出c.353C＞T(p.T118M)、c.803C＞G (p.T268R)复合杂合突变;先证者2检出c.353C＞T (p.T118M)和c.836T＞C(p.L279P)复合杂合突变.均基因确诊MLC.胎儿1MLC1基因相应位点发现c.803C(野生型)和c.353C＞T(p.T118M)杂合改变;胎儿2相应位点均为野生型(c.353C和c.836T).且胎儿基因组DNA均无母体细胞污染.胎儿1生后基因验证结果与产前诊断结果一致,5月龄时头围及生长发育均正常;胎儿2现生后1个月,无巨颅,尚未进行生后验证. 结论 检测胎儿基因组DNA是否具有与先证者相同的MLC1基因突变类型,可对基因诊断明确的MLC家庭提供准确的产前分子诊断.通过Y染色体性别决定区及3个X染色体微卫星标记进行单体型分析可有效判断胎儿基因组中是否存在母体细胞污染,有助于排除母体细胞污染对产前诊断结果的影响,保证产前诊断结果的可靠性. ; Objectives To provide genetic counseling and prenatal molecular diagnosis for two families with megalencephalic leukoencephalopathy with subcortical cysts (MLC).Methods Two MLC patients (probands 1 and 2) were admitted to the Department of Pediatrics of Peking University First Hospital in June 2011 and June 2009,respectively.Peripheral blood was collected and DNA sequencing was performed for genetic analysis for the two MLC patients and their parents.Amniotic fluid and villus of two fetuses (fetus 1 and 2) were collected at 21+4 and 12+3 weeks of gestational age from their mothers when they were pregnant again.The genomic DNA of the two fetuses was extracted and corresponding sites of MLC1 gene were sequenced.Haplotype analysis using a combination of 3 microsatellite markers (AR,DXS6807 and DXS6797) on chromosome X and sex determining region of Y chromosome was performed to detect maternal cell contamination.Verification of the prenatal molecular diagnosis and follow up study after birth were conducted for both fetuses.Results Macrocephaly,motor development delay and typical findings on brain MRI were identified in the two probands,and were clinically diagnosed with ... |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 1007-9408 |
| العلاقة: | 中华围产医学杂志. 2017, 20(3), 177-182.; 1912832; http://hdl.handle.net/20.500.11897/477195Test |
| DOI: | 10.3760/cma.j.issn.1007-9408.2017.03.005 |
| الإتاحة: | https://doi.org/20.500.11897/477195Test https://doi.org/10.3760/cma.j.issn.1007-9408.2017.03.005Test https://hdl.handle.net/20.500.11897/477195Test |
| رقم الانضمام: | edsbas.63EC81B3 |
| قاعدة البيانات: | BASE |
| تدمد: | 10079408 |
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| DOI: | 10.3760/cma.j.issn.1007-9408.2017.03.005 |