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Hu X, He WB, Zhang SP, Luo KL, Gong F, Dai J, Zhang Y, Wan ZX, Li W, Yuan SM, Tan YQ, Lu GX, Lin G, Du J. Next-generation sequence-based preimplantation genetic testing for monogenic disease resulting from maternal mosaicism. Mol Genet Genomic Med 2021; 9:e1662. [PMID: 33942572 PMCID: PMC8172198 DOI: 10.1002/mgg3.1662] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 02/21/2021] [Accepted: 03/01/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mosaicism poses challenges for genetic counseling and preimplantation genetic testing for monogenic disorders (PGT-M). NGS-based PGT-M has been extensively used to prevent the transmission of monogenic defects, but it has not been evaluated in the application of PGT-M resulting from mosaicism. METHODS Four women suspected of mosaicism were confirmed by ultra-deep sequencing. Blastocyst trophectoderm cells and polar bodies were collected for whole genome amplification, followed by pathogenic variants detection and haplotype analysis based on NGS. The embryos free of the monogenic disorders were transplantable. RESULTS Ultra-deep sequencing confirmed that the four women harbored somatic mosaic variants, with the proportion of variant cells at 1.12%, 9.0%, 27.60%, and 91.03%, respectively. A total of 25 blastocysts were biopsied and detected during four PGT cycles and 5 polar bodies were involved in one cycle additionally. For each couple, a wild-type embryo was successfully transplanted and confirmed by prenatal diagnosis, resulting in the birth of four healthy infants. CONCLUSIONS Mosaic variants could be effectively evaluated via ultra-deep sequencing, and could be prevented the transmission by PGT. Our work suggested that an NGS-based PGT approach, involving pathogenic variants detection combined with haplotype analysis, is crucial for accurate PGT-M with mosaicism.
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Affiliation(s)
- Xiao Hu
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Wen-Bin He
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Shuo-Ping Zhang
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Ke-Li Luo
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China
| | - Fei Gong
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China
| | - Jing Dai
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yi Zhang
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Zhen-Xing Wan
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Wen Li
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China
| | - Shi-Min Yuan
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yue-Qiu Tan
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China
| | - Guang-Xiu Lu
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China.,National Engineering and Research Center of Human Stem Cell, Changsha, China
| | - Ge Lin
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China.,National Engineering and Research Center of Human Stem Cell, Changsha, China
| | - Juan Du
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China.,Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Stem Cell and Reproduction Engineering, Ministry of Health, Changsha, China
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Tabatabaiefar MA, Pourreza MR, Tahmasebi P, Saki N, Hashemzadeh Chaleshtori M, Salehi R, Mohammadi-Asl J. A Novel Pathologic Variant in OTOF in an Iranian Family Segregating Hereditary Hearing Loss. Otolaryngol Head Neck Surg 2018; 158:1084-1092. [PMID: 29484972 DOI: 10.1177/0194599818759007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Objective Hearing loss (HL) is the most common sensory-neural defect and the most heterogeneous trait in humans, with the involvement of >100 genes, which make a molecular diagnosis problematic. Next-generation sequencing (NGS) is a new strategy that can overcome this problem. Study Design Descriptive experimental study. Setting Diagnostic laboratory. Subjects and Methods A comprehensive family history was obtained, and clinical evaluations and pedigree analysis were performed in a family with multiple individuals with HL. As the first tier, GJB2 was sequenced, and genetic linkage analysis of DFNB1A/B was performed to rule out the most common cause of the disease. Targeted NGS was used to unravel the molecular etiology of the disease in the HL-associated genes in the proband. Two homozygous variants remained in OTOF after proper filtration. Cosegregation and in silico analysis were done. Preimplantation genetic diagnosis (PGD) was accomplished via linkage analysis and direct sequencing of the pathogenic variant. Results Clinical evaluations suggested autosomal recessive nonsyndromic HL. Two homozygous variants, c.367G>A (p.Gly123Ser) and c.1392+1G>A, were identified in cis status. c.1392+1G>A met the criteria for being pathogenic according to the variant interpretation guideline of the American College of Medical Genetics and Genomics. PGD was successfully performed to prevent the recurrence of the disease in the related family. Conclusion A novel OTOF mutation causing HL was identified. Here, we report the effectiveness of the combined application of targeted NGS and PGD in diagnosis and prevention of hereditary HL.
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Affiliation(s)
- Mohammad Amin Tabatabaiefar
- 1 Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- 2 Pediatric Inherited Diseases Research Center, Research Institute for Primordial Prevention of Noncommunicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Reza Pourreza
- 1 Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Parisa Tahmasebi
- 3 Department of Biology, Faculty of Science, Ilam University, Ilam, Iran
| | - Nader Saki
- 4 Department of Otolaryngology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | | | - Rasoul Salehi
- 1 Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Javad Mohammadi-Asl
- 6 Department of Medical Genetics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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