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ID:14425168
大小:283.50 KB
页数:4页
时间:2018-07-28
《脊髓小脑性共济失调合并房间隔缺损家系的遗传学研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、脊髓小脑性共济失调合并房间隔缺损家系的遗传学研究周丹1郭洪2白云2迟路湘1*(400038重庆,第三军医大学:西南医院心血管内科1,基础医学部医学遗传学教研室)[摘要]目的对一个脊髓小脑共济失调(英文全称,SCA)合并先天性房间隔缺损家系进行临床资料分析和分子遗传学研究。方法分别对SCA和房间隔缺损两个疾病表型完整添加病例来源,包括有:医院、科室、例数、性别、平均年龄(中位年龄)、入选时间段、入院诊断、门诊或是住院病人等……进行临床诊断、家系调查和系谱分析,通过聚合酶链式反应和直接测序的方法对收集到的家系成员分别进行脊髓小脑性共济失调
2、和房间隔缺损相关致病基因进行突变检测和共分离分析。结果该家系4代共有脊髓小脑共济失调现症和已故患者15名,呈常染色体显性遗传模式,病史回顾示家系患者均无明确诱因出现行走不稳、饮水呛咳、言语不清等共济失调的临床特征,基因诊断发现该家系患者SCA3致病基因CAG异常扩增。此外,在家系中还发现包括先证者在内的5名先天性房缺患者,对房缺相关基因进行突变筛查发现3名房缺患者均携带有MYH6基因编码区的一个错义突变c.1154C>T,导致第385位氨基酸由丝氨酸变为亮氨酸(Ser385Leu),其余家系成员无此突变。结论该家系中SCA和ASD两种
3、独立的疾病表型都分别以常染色体显性遗传的方式传递,并且分别由SCA3的致病基因和MYH6基因的突变导致。[关键词]脊髓小脑性共济失调;房间隔缺损;突变;家系中图分类号:R394.3GeneticAnalysisofaSpinocerebellarAtaxiaFamilyCombinedwithAtrialSeptalDefectsZhouDan1,GuoHong2,BaiYun2,ChiLuXiang1(1DepartmentofCardiology,SouthwestHospital,ThirdMilitaryMedicalUniv
4、ersity;2DepartmentofMedicalGenetics,CollegeofBasicMedicalScience,ThirdMilitaryMedicalUniversity,Chongqing,400038)[Abstract]英文摘要语法、措辞需要大力修改;内容根据中文摘要修改ObjectiveTodogeneticandclinicanalysisinanautosomaldominantspinocerebellarataxiafamilycombinedwithcongenitalatrialseptalde
5、fect.MethodsFamilyinvestigation,pedigreeanalysisandclinicaldiagnosiswereperformedonthetwodiseasephenotyperespectively.MutationdetectionofthediseasegenesassociatedwithSCAandASDbypolymerasechainreaction(PCR)withdirectDNAsequencing.ResultsBothSCAandASDwasinheritedinanautos
6、omaldominantmodeinthisfamilywascharacterizedasanautosomaldominantinheritance.Therewere15SCAfamilialpatients,whoappearedwalkinginstability,dysphagiaandslurredspeechafterthirty-yearsold.GeneticdiagnosisdemonstratedtheCAGrepeatsizesofSCA3causativegenewereabnormallyexpanded
7、.MutationscreenmentoftheASDassociatedgenesalsorevealedacodingmutationofMYH6(c.1154C>T)inthe5ASDpatients.TheCAGamplificationofSCA3andc.1111bothco-segregatedwithdiseasephenotypesindependently.ConclusionThereweretwoindependentdiseaseinthisfamilyinheritedasanautosomaldomina
8、ntmode,whichresultedfromdifferentpathogenicmutationofdifferentdiseasegenes.[Keywords]SpinocerebellarAtaxias(SC
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