中国产前诊断杂志(电子版)
中國產前診斷雜誌(電子版)
중국산전진단잡지(전자판)
CHINESE JOURNAL OF PRENATAL DIAGNOSIS(ELECTRONIC VERSION)
2014年
4期
37-42
,共6页
徐盈%张建芳%郭芬芬%黎昱%燕凤%徐慧%任菊霞%宋婷婷%王德堂%辛晓燕%陈必良
徐盈%張建芳%郭芬芬%黎昱%燕鳳%徐慧%任菊霞%宋婷婷%王德堂%辛曉燕%陳必良
서영%장건방%곽분분%려욱%연봉%서혜%임국하%송정정%왕덕당%신효연%진필량
单基因病%产前分子诊断%脊髓性肌萎缩症%苯丙酮尿症%先天性软骨发育不全
單基因病%產前分子診斷%脊髓性肌萎縮癥%苯丙酮尿癥%先天性軟骨髮育不全
단기인병%산전분자진단%척수성기위축증%분병동뇨증%선천성연골발육불전
monogenic disease%prenatal molecular diagnosis%spinal muscular atrophy%PKU%achon-droplasia
目的:探讨脊髓性肌萎缩症(SMA)、苯丙酮尿症(PKU)和先天性软骨发育不全(ACH)产前基因诊断的高效的临床检测方法。方法根据不同单基因病的基因突变类型,本研究应用 DHPLC 技术对1例 SMA 阳性家族史的胎儿绒毛样本进行 SMN1基因7号外显子缺失检测,选择正常人及 SMA 患者作对照。通过直接测序法分别对 PKU 家系和 ACH 家系的患者、表型正常的个体及其胎儿进行 PAH致病基因和 FGFR3基因第10外显子进行检测。结果SMA 阳性家系中,胎儿未检测到 SMN1基因7号外显子的纯合缺失,建议继续妊娠,结果顺利产出1名正常儿。PKU 阳性家系通过检测发现患者在PAH 基因上确实存在无义突变,c.781C>T(p.Arg261Ter)和错义突变 c.842C>T(p.Pro281Leu),均为杂合子。但是胎儿与患者母亲的突变类型一致,为携带者,不发病,建议继续妊娠。软骨发育不全患者送检标本 FGFR3基 因 外 显 子10发现1处序列异常,为 c.1138G > A,导致编码氨基酸改变Gly380Arg,但其胎儿羊水标本检测 FGFR3基因外显子10未发现序列异常。结论根据单基因病不同的基因突变类型,选择合适的方法可快速、准确地实现单基因病产前基因的诊断,尽早避免单基因病患儿的出生。
目的:探討脊髓性肌萎縮癥(SMA)、苯丙酮尿癥(PKU)和先天性軟骨髮育不全(ACH)產前基因診斷的高效的臨床檢測方法。方法根據不同單基因病的基因突變類型,本研究應用 DHPLC 技術對1例 SMA 暘性傢族史的胎兒絨毛樣本進行 SMN1基因7號外顯子缺失檢測,選擇正常人及 SMA 患者作對照。通過直接測序法分彆對 PKU 傢繫和 ACH 傢繫的患者、錶型正常的箇體及其胎兒進行 PAH緻病基因和 FGFR3基因第10外顯子進行檢測。結果SMA 暘性傢繫中,胎兒未檢測到 SMN1基因7號外顯子的純閤缺失,建議繼續妊娠,結果順利產齣1名正常兒。PKU 暘性傢繫通過檢測髮現患者在PAH 基因上確實存在無義突變,c.781C>T(p.Arg261Ter)和錯義突變 c.842C>T(p.Pro281Leu),均為雜閤子。但是胎兒與患者母親的突變類型一緻,為攜帶者,不髮病,建議繼續妊娠。軟骨髮育不全患者送檢標本 FGFR3基 因 外 顯 子10髮現1處序列異常,為 c.1138G > A,導緻編碼氨基痠改變Gly380Arg,但其胎兒羊水標本檢測 FGFR3基因外顯子10未髮現序列異常。結論根據單基因病不同的基因突變類型,選擇閤適的方法可快速、準確地實現單基因病產前基因的診斷,儘早避免單基因病患兒的齣生。
목적:탐토척수성기위축증(SMA)、분병동뇨증(PKU)화선천성연골발육불전(ACH)산전기인진단적고효적림상검측방법。방법근거불동단기인병적기인돌변류형,본연구응용 DHPLC 기술대1례 SMA 양성가족사적태인융모양본진행 SMN1기인7호외현자결실검측,선택정상인급 SMA 환자작대조。통과직접측서법분별대 PKU 가계화 ACH 가계적환자、표형정상적개체급기태인진행 PAH치병기인화 FGFR3기인제10외현자진행검측。결과SMA 양성가계중,태인미검측도 SMN1기인7호외현자적순합결실,건의계속임신,결과순리산출1명정상인。PKU 양성가계통과검측발현환자재PAH 기인상학실존재무의돌변,c.781C>T(p.Arg261Ter)화착의돌변 c.842C>T(p.Pro281Leu),균위잡합자。단시태인여환자모친적돌변류형일치,위휴대자,불발병,건의계속임신。연골발육불전환자송검표본 FGFR3기 인 외 현 자10발현1처서렬이상,위 c.1138G > A,도치편마안기산개변Gly380Arg,단기태인양수표본검측 FGFR3기인외현자10미발현서렬이상。결론근거단기인병불동적기인돌변류형,선택합괄적방법가쾌속、준학지실현단기인병산전기인적진단,진조피면단기인병환인적출생。
Objective To investigate methods for prenatal diagnosis of spinal muscular atrophy (SMA), PKU and achondroplasia (ACH).Method Different test methods are applied based on different muta-tional pattern.The chorionic villus of 1 fetus with SMA positive family history was collected.The exon 7 of telomeric survial motor neuron (SMN1)gene was detected by DHPLC.Normal member and SMA pa-tient were selected as controls.The hot mutation in exon 10 of FGFR3 gene and PAH gene were detected by DNA sequencing in patients,normal phenotype individuals and pregnancy fetus.Results ‘Homozy-gous deletion of the SMN1 exon7 wasn′t detected in pregnancy fetus.The pedigree diagnosed as negative continued to pregnancy,and gave birth to a normal baby.c.781C>T (p.Arg261Ter)and c.842C>T (p. Pro281Leu)mutations of PAH gene were detected in patient with PKU positive family history.Fortunate-ly,Sequencing analysis revealed the fetus shows the mutation of PAH gene as same as his mother c.842C>T (p.Pro281Leu).The pedigree diagnosed as carrier continued to pregnancy.The mother of the fetus diagnosed as achondroplasia had G1138A mutation,but the fetus had normal nucleotide at nucleotide 1138 in exton 10 of FGFR3,therefore were excluded from achondroplasia.Conclusions The application of dif-ferent test methods is efficient and practical ways in different monogenic disease.