A new method for noninvasive prenatal diagnosis of fetal sex was developed by using single cell PEP PCR techniques. Micromamipulation techniques were used to obtain single fetal cells from 273 maternal blood samples...A new method for noninvasive prenatal diagnosis of fetal sex was developed by using single cell PEP PCR techniques. Micromamipulation techniques were used to obtain single fetal cells from 273 maternal blood samples. The genome of single cells was preamplified by PEP and SRY genes were analyzed by PCR method. The SRY genes of 149 samples were detected by the new method among 153 samples carrying male fetus, while 119 out of 120 samples carrying female fetus were proved negative for SRY genes. The sensitivity and specificity of the new method were 97.39 % and 99.17 % respectively and the correct rate was 98.17 %. The new method has the advantage of high sensitivity and specificity in noninvasive prenatal diagnosis of fetal sex and provides the basis of other researches such as sex linked inherited diseases.展开更多
A couple with a proband child of GJB2 （encoding the gap junction protein connexin 26）-associated hearing impairment and a previous pregnancy miscarriage sought for a reproductive solution to bear a healthy child. Ou...A couple with a proband child of GJB2 （encoding the gap junction protein connexin 26）-associated hearing impairment and a previous pregnancy miscarriage sought for a reproductive solution to bear a healthy child. Our study aimed to develop a cus- tomized preconception-to-neonate care trajectory to fulfill this clinical demand by integrating preimplantation genetic diagno- sis （PGD）, noninvasive prenatal testing （NIPT）, and noninvasive prenatal diagnosis （N1PD） into the strategy. Auditory and ge- netic diagnosis of the proband child was carried out to identify the disease causative mutations. The couple then received in-vitro-fertilization treatment, and eight embryos were obtained for day 5 biopsy. PGD was performed by short-tandem-repeat linkage analysis and Sanger sequencing of GJB2 gene. Transfer of a GJB2c.235delC heterozygous embryo resulted in a sin- gleton pregnancy. At the 13th week of gestation, genomic DNA （gDNA） from the trio family and cell-free DNA （cfDNA） from maternal plasma were obtained for assessment of fetal chromosomal aneuploidy and GJB2 mutations. NIPT and NIPD showed the absence of chromosomal aneuploidy and GJB2-associated disease in the fetus, which was later confirmed by inva- sire procedures and postnatal genetic/auditory diagnosis. This strategy successfully prevented the transmission of hearing im- pairment in the newborn, thus providing a valuable experience in reproductive management of similar cases and potentially other monogenic disorders.展开更多
目的:探讨分析无创产前筛查(noninvasive prenatal screening,NIPS)技术在罕见常染色体三体(rare autosomal trisomies,RAT)及染色体拷贝数变异(copy number variation,CNV)筛查中的临床意义。方法:回顾性分析于2017年3月—2023年7月因N...目的:探讨分析无创产前筛查(noninvasive prenatal screening,NIPS)技术在罕见常染色体三体(rare autosomal trisomies,RAT)及染色体拷贝数变异(copy number variation,CNV)筛查中的临床意义。方法:回顾性分析于2017年3月—2023年7月因NIPS提示RAT和(或)CNV高风险在泉州市妇幼保健院·儿童医院产前诊断中心行羊水染色体核型分析及单核苷酸多态性微阵列(single nucleotide polymorphism array,SNParray)检测的108例患者情况。结果:83例NIPS提示RAT高风险者中产前诊断结果异常共15例,阳性预测值为18.07%,分别为1例致病性拷贝数变异(pathogenic copy number variants,pCNV)、9例临床意义不明确(variants of uncertain significance,VOUS)、4例杂合性丢失(loss of heterozygosity,LOH)及1例VOUS+LOH。25例NIPS提示CNV高风险者中产前诊断结果异常共16例,阳性预测值为64.00%,分别为11例pCNV、1例可能致病性拷贝数变异(likely pathogenic copy number variants,lpCNV)及4例VOUS。结论:NIPS技术对于RAT高风险阳性预测值不高,但提示不良妊娠结局风险增加;对于CNV高风险筛查有一定的应用价值。当NIPS提示RAT和染色体CNV高风险,应结合产前诊断结果及超声随访对胎儿预后进行评估,并加强妊娠期监测和管理。展开更多
基金ThisprojectwassupportedbygrantsfromScientificFoundationofMinistryofPublicHealth (No. 96 2112)andHubeiProvincialNaturalSciencesFoundation (No .2 0 01ABB130 )ofChina
文摘A new method for noninvasive prenatal diagnosis of fetal sex was developed by using single cell PEP PCR techniques. Micromamipulation techniques were used to obtain single fetal cells from 273 maternal blood samples. The genome of single cells was preamplified by PEP and SRY genes were analyzed by PCR method. The SRY genes of 149 samples were detected by the new method among 153 samples carrying male fetus, while 119 out of 120 samples carrying female fetus were proved negative for SRY genes. The sensitivity and specificity of the new method were 97.39 % and 99.17 % respectively and the correct rate was 98.17 %. The new method has the advantage of high sensitivity and specificity in noninvasive prenatal diagnosis of fetal sex and provides the basis of other researches such as sex linked inherited diseases.
基金supported by the National Program on Key Basic Research Project(2014CB943001 and 2012CB944700)the National Natural Science Foundation of China(81120108009 and 81530032)+3 种基金the National Health and Family Planning Commission of the People's Republic of China(201402004)Science and Technology Plan of Guangdong Province(2013B022000005)Guangdong Enterprise Key Laboratory of Human Disease Genomics(2011A060906007)Shenzhen Engineering Laboratory for Birth Defects Screening([2011]861)
文摘A couple with a proband child of GJB2 （encoding the gap junction protein connexin 26）-associated hearing impairment and a previous pregnancy miscarriage sought for a reproductive solution to bear a healthy child. Our study aimed to develop a cus- tomized preconception-to-neonate care trajectory to fulfill this clinical demand by integrating preimplantation genetic diagno- sis （PGD）, noninvasive prenatal testing （NIPT）, and noninvasive prenatal diagnosis （N1PD） into the strategy. Auditory and ge- netic diagnosis of the proband child was carried out to identify the disease causative mutations. The couple then received in-vitro-fertilization treatment, and eight embryos were obtained for day 5 biopsy. PGD was performed by short-tandem-repeat linkage analysis and Sanger sequencing of GJB2 gene. Transfer of a GJB2c.235delC heterozygous embryo resulted in a sin- gleton pregnancy. At the 13th week of gestation, genomic DNA （gDNA） from the trio family and cell-free DNA （cfDNA） from maternal plasma were obtained for assessment of fetal chromosomal aneuploidy and GJB2 mutations. NIPT and NIPD showed the absence of chromosomal aneuploidy and GJB2-associated disease in the fetus, which was later confirmed by inva- sire procedures and postnatal genetic/auditory diagnosis. This strategy successfully prevented the transmission of hearing im- pairment in the newborn, thus providing a valuable experience in reproductive management of similar cases and potentially other monogenic disorders.
文摘目的:探讨分析无创产前筛查(noninvasive prenatal screening,NIPS)技术在罕见常染色体三体(rare autosomal trisomies,RAT)及染色体拷贝数变异(copy number variation,CNV)筛查中的临床意义。方法:回顾性分析于2017年3月—2023年7月因NIPS提示RAT和(或)CNV高风险在泉州市妇幼保健院·儿童医院产前诊断中心行羊水染色体核型分析及单核苷酸多态性微阵列(single nucleotide polymorphism array,SNParray)检测的108例患者情况。结果:83例NIPS提示RAT高风险者中产前诊断结果异常共15例,阳性预测值为18.07%,分别为1例致病性拷贝数变异(pathogenic copy number variants,pCNV)、9例临床意义不明确(variants of uncertain significance,VOUS)、4例杂合性丢失(loss of heterozygosity,LOH)及1例VOUS+LOH。25例NIPS提示CNV高风险者中产前诊断结果异常共16例,阳性预测值为64.00%,分别为11例pCNV、1例可能致病性拷贝数变异(likely pathogenic copy number variants,lpCNV)及4例VOUS。结论:NIPS技术对于RAT高风险阳性预测值不高,但提示不良妊娠结局风险增加;对于CNV高风险筛查有一定的应用价值。当NIPS提示RAT和染色体CNV高风险,应结合产前诊断结果及超声随访对胎儿预后进行评估,并加强妊娠期监测和管理。
