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Wincent J, Helgadóttir HT, Sergouniotis F, Salazar Mantero A, Carvalho CMB, Malmgren H, Lindstrand A, Iwarsson E. Genome sequencing differentiates a paracentric inversion from a balanced insertion enabling more accurate preimplantation genetic testing. Acta Obstet Gynecol Scand 2024. [PMID: 38872454 DOI: 10.1111/aogs.14898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 05/13/2024] [Accepted: 05/26/2024] [Indexed: 06/15/2024]
Abstract
INTRODUCTION Distinguishing paracentric inversions (PAIs) from chromosomal insertions has traditionally relied on fluorescent in situ hybridization (FISH) techniques, but recent advancements in high-throughput sequencing have enabled the use of genome sequencing for such differentiation. In this study, we present a 38-year-old male carrier of a paracentric inversion on chromosome 2q, inv (2)(q31.2q34), whose partner experienced recurrent miscarriages. MATERIAL AND METHODS FISH analysis confirmed the inversion, and genome sequencing was employed for detailed characterization. RESULTS Preimplantation genetic testing (PGT) revealed that all assessed embryos were balanced, consistent with the low risk of unbalanced offspring associated with PAIs. While PAI carriers traditionally exhibit low risk of producing unbalanced offspring, exceptions exist due to crossover events within the inversion loop. Although the sample size was limited, the findings align with existing sperm study data, supporting the rare occurrence of unbalanced progeny in PAI carriers. CONCLUSIONS This study highlights the possibility of characterizing PAIs using genome sequencing to enable correct reproductive counseling and PGT decisions. Detailed characterization of a PAI is crucial for understanding potential outcomes and guiding PGT strategies, as accurate knowledge of the inversion size is essential for appropriate method selection in PGT. Given the very low risk of unbalanced offspring in PAI carriers, routine PGT may not be warranted but should be considered in specific cases with a history of unbalanced progeny or recurrent miscarriages. This study contributes to our understanding of PAI segregation and its implications for reproductive outcomes.
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Affiliation(s)
- Josephine Wincent
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Clinical Genetics and Genomics, Karolinska University Hospital, Stockholm, Sweden
| | - Hafdís T Helgadóttir
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Clinical Genetics and Genomics, Karolinska University Hospital, Stockholm, Sweden
| | - Fotios Sergouniotis
- Department of Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Obstetrics and Gynecology, Karolinska University Hospital, Stockholm, Sweden
| | - Angelo Salazar Mantero
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Clinical Genetics and Genomics, Karolinska University Hospital, Stockholm, Sweden
| | | | - Helena Malmgren
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Clinical Genetics and Genomics, Karolinska University Hospital, Stockholm, Sweden
| | - Anna Lindstrand
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Clinical Genetics and Genomics, Karolinska University Hospital, Stockholm, Sweden
| | - Erik Iwarsson
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Clinical Genetics and Genomics, Karolinska University Hospital, Stockholm, Sweden
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Zhang Z, Luo K, Zhang S, Cheng D, Hu L, Tan YQ, Zhang S, Gong F, Xie P, Lin G. Clinical outcomes in carriers of insertional translocation: a retrospective analysis of comprehensive chromosome screening results. F S Rep 2024; 5:55-62. [PMID: 38524217 PMCID: PMC10958698 DOI: 10.1016/j.xfre.2023.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 03/26/2024] Open
Abstract
Objective To evaluate the clinical outcomes in the carriers of insertional translocation (IT). Design Retrospective case series. Setting University-affiliated reproductive medical center. Patients Twenty-three couples with ITs. Intervention No direct interventions were involved; however, this study included patients who underwent preimplantation genetic testing for structural chromosomal rearrangements (PGT-SR). Main Outcome Measure Outcome of preimplantation genetic testing for structural chromosomal rearrangements and percentage of blastocysts available for transfer. Results Among 23 IT carriers, 15 were simple interchromosome ITs (type A), 3 were intrachromosome IT carriers (type B), and 5 were interchromosome IT carriers combined with other translocations (type C). A total of 190 blastocysts from 30 cycles were biopsied, 187 embryos were tested successfully, and only 57 blastocysts (30.5%) from 21 patients were available for transfer (normal or balanced). The unbalanced rearrangement rate of type C was 79.2% (42/53), and the proportion of type A was 50.0% (57/114), which was significantly higher than that of type B (5%, 1/20). In type A, the probability of embryos harboring unbalanced rearrangement in female carriers was 56.0% (51/91), which was higher than that in male carriers (26.1%, 6/23). Furthermore, the haploid autosomal length value of the inserted fragment was correlated linearly with the incidence of abnormal embryos. In type A gametes, most gametes produced by 2:2 separation without crossover, and no 3:1 separation gamete was observed. Conclusions The chance of identifying normal or balanced and mosaic blastocysts per mature oocytes in patients with ITs are 16.6% (67/404). Greater IT complexity results in fewer transferable embryos. For simple interchromosome ITs, female carriers and those with higher haploid autosomal length values have a higher risk of producing embryos with unbalanced rearrangement.
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Affiliation(s)
- Zhiqi Zhang
- Hospital of Hunan Guangxiu, Hunan Normal University School of Medicine, Hunan, People’s Republic of China
| | - Keli Luo
- NHC Key Laboratory of Human Stem and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, People’s Republic of China
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
| | - Senlin Zhang
- Hospital of Hunan Guangxiu, Hunan Normal University School of Medicine, Hunan, People’s Republic of China
| | - Dehua Cheng
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
| | - Liang Hu
- NHC Key Laboratory of Human Stem and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, People’s Republic of China
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
| | - Yue-Qiu Tan
- NHC Key Laboratory of Human Stem and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, People’s Republic of China
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
| | - Shuoping Zhang
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
| | - Fei Gong
- NHC Key Laboratory of Human Stem and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, People’s Republic of China
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
| | - Pingyuan Xie
- Hospital of Hunan Guangxiu, Hunan Normal University School of Medicine, Hunan, People’s Republic of China
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
- National Engineering and Research Center of Human Stem Cells, Changsha, People’s Republic of China
| | - Ge Lin
- NHC Key Laboratory of Human Stem and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, People’s Republic of China
- Reproductive and Genetic Hospital of CITIC-Xiangya, Hunan, People’s Republic of China
- Clinical Research Center for Reproduction and Genetics, Hunan Province, People’s Republic of China
- National Engineering and Research Center of Human Stem Cells, Changsha, People’s Republic of China
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Jia M, Xue X. Higher chromosomal abnormality rate in blastocysts from a subset of patients with pericentric inversion (Inv) 1 variant. HUM FERTIL 2023; 26:1307-1312. [PMID: 36803371 DOI: 10.1080/14647273.2023.2179896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/20/2022] [Indexed: 02/22/2023]
Abstract
The purpose of this study was to evaluate the incidence of unbalanced chromosome rearrangement in blastocyst-stage embryos from carriers of pericentric inversion of chromosome 1 (PEI-1). A total of 98 embryos from 22 PEI-1 carriers were tested for unbalanced rearrangements, originating from inversion carriers, and overall aneuploidy. Logistic regression analysis indicated that the ratio of inverted segment size to chromosome length was a statistically significant risk factor for unbalanced chromosome rearrangement from PEI-1 carriers (p = 0.003). The optimal cut-off values to predict the risk of unbalanced chromosome rearrangement was 36%, with the incidence being 2.0% in the <36% group and 32.7% in the ≥36% group. The unbalanced embryo rate was 24.4% in male carriers compared to 12.3% in female carriers. Inter-chromosomal effect analysis was performed using 98 blastocysts from PEI-1 carriers and 116 blastocysts from age-matched controls. PEI-1 carriers had similar sporadic aneuploidy rates compared to those of age-matched controls at 32.7 vs. 31.9%, respectively. In conclusion, the risk of unbalanced chromosome rearrangement is affected by inverted segment size in PEI-1 carriers.
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Affiliation(s)
- Miaomiao Jia
- The ART Center, Northwest Women and Children's Hospital, Xi'an, China
| | - Xia Xue
- The ART Center, Northwest Women and Children's Hospital, Xi'an, China
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Tong J, Jiang J, Niu Y, Zhang T. Do chromosomal inversion carriers really need preimplantation genetic testing? J Assist Reprod Genet 2022; 39:2573-2579. [PMID: 36367623 PMCID: PMC9723079 DOI: 10.1007/s10815-022-02654-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 10/31/2022] [Indexed: 11/13/2022] Open
Abstract
PURPOSE This study aimed to evaluate the rates of euploidy, aneuploidy, and mosaicism in preimplantation genetic testing for structural rearrangements (PGT-SR) cycles from chromosomal inversion carriers. In addition, this work also focused on assessing the impact of some contributors on the incidence of parental originating aneuploidy and mosaicism. METHODS This retrospective review enrolled chromosomal inversion carrier couples of whom the females were under 38 years old undergoing PGT-SR at a single academic reproductive center. Subgroups were divided according to the gender of carriers, the inversion type, and the semen parameters of male carriers (male factor infertility (MF) or non-MF). Patient demographics, cycle characteristics, and PGT-SR outcomes were compared among subgroups. RESULTS A total of 71 PGT-SR cycles from 57 inversion carrier couples were included for analysis. Among the 283 blastocysts, 48.4% were identified as euploidy, 27.9% as aneuploidy, and the remaining 23.7% as mosaicism. Only 32.9% of aneuploid embryos and 1.5% of mosaic embryos involved the parental inversion chromosomes. Notably, the female inversion carriers seemed to produce more parental originating aneuploid embryos than male inversion carriers (45.5% vs 23.9%, p = 0.044). CONCLUSIONS The type of inversion and sperm parameters of male chromosomal inversion carriers did not affect the ploidy status of embryos. The incidence of parental originating aneuploidy in inversion carrier couples is lower than expected. For male chromosomal inversion carriers with normal sperm condition whose female partners are under 38 years old, natural conception combined with prenatal diagnosis could be provided as an option during fertility counseling.
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Affiliation(s)
- Jing Tong
- Center for Reproductive Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200135, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Jianwei Jiang
- Department of Laboratory Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200135, China
| | - Yichao Niu
- Center for Reproductive Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200135, China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China
| | - Ting Zhang
- Center for Reproductive Medicine, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200135, China.
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, China.
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A Mini-Review Regarding the Clinical Outcomes of In Vitro Fertilization (IVF) Following Pre-Implantation Genetic Testing (PGT)-Next Generation Sequencing (NGS) Approach. Diagnostics (Basel) 2022; 12:diagnostics12081911. [PMID: 36010262 PMCID: PMC9406843 DOI: 10.3390/diagnostics12081911] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/30/2022] [Accepted: 08/05/2022] [Indexed: 11/17/2022] Open
Abstract
Background: PGT-based NGS revolutionized the field of reproductive medicine, becoming an integrated component within current assisted reproductive technology (ART) protocols. Methods: We searched the literature published in the last half a decade in four databases (PubMed/Medline, ISI Web of Knowledge, ScienceDirect, and Scopus) between 2018 and 2022. Results: A total of 1388 articles were filtered, from which 60 met, initially, the eligibility criteria, but only 42 were included (≥100 patients/couples—62,465 patients and 6628 couples in total) in the present mini-review. In total, forty-two (70.0%) reported reproductive outcomes, while eighteen (30.0%) had distinct objectives. Furthermore, n = 1, 1.66% of the studies focused on PGT, n = 1, 1.66% on pre-implantation genetic testing for monogenic disorders (PGT-M), n = 3, 5.0% on pre-implantation genetic testing for structural rearrangements (PGT-SR) and n = 55, 91.66% on pre-implantation genetic testing for aneuploidies (PGT-A). Conclusions: PGT using NGS proved to be an excellent companion that folds within the current ascending tendency among couples that require specialty care. We strongly encourage future studies to provide a systematic overview expanded at a larger scale on the role of the PGT-NGS.
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Ogur C, Kahraman S, Griffin DK, Cinar Yapan C, Tufekci MA, Cetinkaya M, Temel SG, Yilmaz A. PGT for structural chromosomal rearrangements in 300 couples reveals specific risk factors but an interchromosomal effect is unlikely. Reprod Biomed Online 2022; 46:713-727. [PMID: 36803887 DOI: 10.1016/j.rbmo.2022.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/17/2022] [Accepted: 07/25/2022] [Indexed: 11/26/2022]
Abstract
RESEARCH QUESTION What factors affect the proportion of chromosomally balanced embryos in structural rearrangement carriers? Is there any evidence for an interchromosomal effect (ICE)? DESIGN Preimplantation genetic testing outcomes of 300 couples (198 reciprocal, 60 Robertsonian, 31 inversion and 11 complex structural rearrangement carriers) were assessed retrospectively. Blastocysts were analysed either by array-comparative genomic hybridization or next-generation sequencing techniques. ICE was investigated using a matched control group and sophisticated statistical measurement of effect size (φ). RESULTS 300 couples underwent 443 cycles; 1835 embryos were analysed and 23.8% were diagnosed as both normal/balanced and euploid. The overall cumulative clinical pregnancy and live birth rates were 69.5% and 55.8%, respectively. Complex translocations and female age (≥35) were found to be risk factors associated with lower chance of having a transferable embryo (P < 0.001). Based on analysis of 5237 embryos, the cumulative de-novo aneuploidy rate was lower in carriers compared to controls (45.6% versus 53.4%, P < 0.001) but this was a 'negligible' association (φ < 0.1). A further assessment of 117,033 chromosomal pairs revealed a higher individual chromosome error rate in embryos of carriers compared to controls (5.3% versus 4.9%), which was also a 'negligible' association (φ < 0.1), despite a P-value of 0.007. CONCLUSIONS These findings suggest that rearrangement type, female age and sex of the carrier have significant impacts on the proportion of transferable embryos. Careful examination of structural rearrangement carriers and controls indicated little or no evidence for an ICE. This study helps to provide a statistical model for investigating ICE and an improved personalized reproductive genetics assessment for structural rearrangement carriers.
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Affiliation(s)
- Cagri Ogur
- Yildiz Technical University, Department of Bioengineering, Istanbul, Turkey; Igenomix Avrupa Laboratories, Istanbul, Turkey.
| | - Semra Kahraman
- Istanbul Memorial Hospital, ART and Reproductive Genetics Center, Istanbul, Turkey
| | - Darren Karl Griffin
- School of Biosciences, Centre for Interdisciplinary Studies of Reproduction, University of Kent, Canterbury CT2 7NJ, UK
| | - Cigdem Cinar Yapan
- Istanbul Memorial Hospital, ART and Reproductive Genetics Center, Istanbul, Turkey
| | - Mehmet Ali Tufekci
- Istanbul Memorial Hospital, ART and Reproductive Genetics Center, Istanbul, Turkey
| | - Murat Cetinkaya
- Istanbul Memorial Hospital, ART and Reproductive Genetics Center, Istanbul, Turkey
| | - Sehime Gulsun Temel
- Uludag University, Faculty of Medicine, Department of Medical Genetics, Bursa, Turkey.
| | - Alper Yilmaz
- Yildiz Technical University, Department of Bioengineering, Istanbul, Turkey.
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Xie P, Hu L, Peng Y, Tan YQ, Luo K, Gong F, Lu G, Lin G. Risk Factors Affecting Alternate Segregation in Blastocysts From Preimplantation Genetic Testing Cycles of Autosomal Reciprocal Translocations. Front Genet 2022; 13:880208. [PMID: 35719400 PMCID: PMC9201810 DOI: 10.3389/fgene.2022.880208] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/11/2022] [Indexed: 11/23/2022] Open
Abstract
Reciprocal translocations are the most common structural chromosome rearrangements and may be associated with reproductive problems. Therefore, the objective of this study was to analyze factors that can influence meiotic segregation patterns in blastocysts for reciprocal translocation carriers. Segregation patterns of quadrivalents in 10,846 blastocysts from 2,871 preimplantation genetic testing cycles of reciprocal translocation carriers were analyzed. The percentage of normal/balanced blastocysts was 34.3%, and 2:2 segregation was observed in 90.0% of the blastocysts. Increased TAR1 (ratio of translocated segment 1 over the chromosome arm) emerged as an independent protective factor associated with an increase in alternate segregation (p = 0.004). Female sex and involvement of an acrocentric chromosome (Acr-ch) were independent risk factors that reduced alternate segregation proportions (p < 0.001). Notably, a higher TAR1 reduced the proportion of adjacent-1 segregation (p < 0.001); a longer translocated segment and female sex increased the risk of adjacent-2 segregation (p = 0.009 and p < 0.001, respectively). Female sex and involvement of an Acr-ch enhanced the ratio of 3:1 segregation (p < 0.001 and p = 0.012, respectively). In conclusion, autosomal reciprocal translocation carriers have reduced proportions of alternate segregation in blastocysts upon the involvement of an Acr-ch, female sex, and lower TAR1. These results may facilitate more appropriate genetic counseling for couples with autosomal reciprocal translocation regarding their chances of producing normal/balanced blastocysts.
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Affiliation(s)
- Pingyuan Xie
- Hunan Normal University School of Medicine, Changsha, China
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
| | - Liang Hu
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yangqin Peng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yue-qiu Tan
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Keli Luo
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Fei Gong
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Guangxiu Lu
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Ge Lin
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Development and Carcinogenesis, Changsha, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
- *Correspondence: Ge Lin,
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Zheng W, Hu H, Zhang S, Xu X, Gao Y, Gong F, Lu G, Lin G. The comprehensive variant and phenotypic spectrum of TUBB8 in female infertility. J Assist Reprod Genet 2021; 38:2261-2272. [PMID: 33970371 DOI: 10.1007/s10815-021-02219-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 05/02/2021] [Indexed: 12/13/2022] Open
Abstract
PURPOSE TUBB8 is a gene that is frequently analysed in the genetic diagnosis of female infertility; 102 variants of this gene have been identified. However, the evaluation of its pathogenicity and the resulting phenotypes vary. Here, we aimed to identify novel TUBB8 variants as well as to summarize the reported variants and phenotypes in order for them to be included in genetic counselling analyses. METHODS We performed whole exome sequencing to screen for candidate variants in 100 infertile female subjects and 100 controls who were able to conceive naturally. All variants were confirmed by Sanger sequencing. The effects of the variants in oocytes/arrested embryos were assessed by morphological observations, polar body biopsies, and chromosome analysis. A molecular modelling analysis was used to evaluate the possible effects of variants on protein secondary structure. RESULTS We identified 29 TUBB8 variants, of which 20 were novel and five were maternally inherited. We identified three of a total of six recurrent variants that were specific for complete cleavage failure. Moreover, we obtained evidence that TUBB8 variants with large polar bodies had chromosome segregation errors. CONCLUSIONS Our study expands the spectrum of TUBB8 variants, particularly for embryonic arrest. Together with the extant knowledge of TUBB8 variants, this study provides a foundation for the genetic counselling of female infertility.
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Affiliation(s)
- Wei Zheng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China
| | - Huiling Hu
- Laboratory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
| | - Shuoping Zhang
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China
| | - Xilin Xu
- Laboratory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
| | - Yong Gao
- Wuhan BGI Clinical Laboratory Co., Ltd., Wuhan, 430075, China
| | - Fei Gong
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China.,Laboratory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
| | - Guangxiu Lu
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China.,Laboratory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
| | - Ge Lin
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, 410008, China. .,Laboratory of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China.
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Xie P, Li Y, Cheng D, Hu L, Tan Y, Luo K, Gong F, Lu G, Lin G. Preimplantation genetic testing results of blastocysts from 12 non-Robertsonian translocation carriers with chromosome fusion and comparison with Robertsonian translocation carriers. Fertil Steril 2021; 116:174-180. [PMID: 33676754 DOI: 10.1016/j.fertnstert.2020.11.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 11/05/2020] [Accepted: 11/20/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To investigate the effects of non-Robertsonian translocation with chromosome fusion (N-RBCF) on preimplantation embryos. DESIGN Case series. SETTING University-affiliated center. PATIENT(S) Twelve couples with N-RBCF. INTERVENTION(S) Assisted reproduction with preimplantation genetic testing in chromosomal structural rearrangement (PGT-SR). MAIN OUTCOME MEASURE(S) Normal embryo rate, unbalanced translocation rate. RESULT(S) PGT was performed in 12 N-RBCF carriers, of whom 4 carried Y-autosome fusions and 8 autosomal fusions. A total of 12 (63.2%) of 19 blastocysts exhibited normal/balanced embryos, and only one (5.3%) embryo exhibited unbalanced translocations among Y-autosome fusion cases. In contrast to these findings, the percentage of normal/balanced blastocysts in 8 autosomal N-RBCF cases was 28.2% (11/39), whereas the unbalanced translocation rate was 53.8%. Furthermore, the percentage of normal/balanced embryos in the Robertsonian translocation group was significantly higher than that of the 8 autosomal N-RBCF (48.7% vs. 28.2%) cases. The rates of abnormality from chromosomal fusion in the 8 autosomal N-RBCF cases were significantly higher than those noted in the Robertsonian translocation (53.8% vs. 31.4%) subjects. The results of the stratified analysis according to the carrier's sex demonstrated that the rates of unbalanced translocation were significantly higher in the male autosomal N-RBCF subjects than those from the corresponding Robertsonian translocation (55% vs. 19.7%) cases. CONCLUSION(S) A low number of unbalanced translocations was identified in blastocysts from N-RBCF subjects who carried the Y fusion. The risk of unbalanced translocation in autosomal N-RBCF was higher than that of the Robertsonian translocation, notably in male carriers.
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Affiliation(s)
- Pingyuan Xie
- Hunan Normal University School of Medicine, Changsha, People's Republic of China; National Engineering and Research Center of Human Stem Cell, Changsha, People's Republic of China
| | - Yiqing Li
- Hunan Normal University, Changsha, People's Republic of China
| | - Dehua Cheng
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China
| | - Liang Hu
- National Engineering and Research Center of Human Stem Cell, Changsha, People's Republic of China; Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China
| | - Yueqiu Tan
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China
| | - Keli Luo
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China
| | - Fei Gong
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China
| | - Guangxiu Lu
- National Engineering and Research Center of Human Stem Cell, Changsha, People's Republic of China; Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China
| | - Ge Lin
- National Engineering and Research Center of Human Stem Cell, Changsha, People's Republic of China; Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, People's Republic of China; Laboratory of Reproductive and Stem Cell Engineering, Key Lab National Health and Family Planning Commission, Central South University, Changsha, People's Republic of China.
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10
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Yuan P, Zheng L, Ou S, Zhao H, Li R, Luo H, Tan X, Zhang Q, Wang W. Evaluation of chromosomal abnormalities from preimplantation genetic testing to the reproductive outcomes: a comparison between three different structural rearrangements based on next-generation sequencing. J Assist Reprod Genet 2021; 38:709-718. [PMID: 33409753 DOI: 10.1007/s10815-020-02053-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 12/28/2020] [Indexed: 10/22/2022] Open
Abstract
PURPOSE The aim of this study was to determine factors affecting the chromosome imbalance in blastocysts and reproductive outcomes by a comparison between the reciprocal translocation (REC), inversion (INV), and Robertsonian translocation (ROB) carriers. METHODS Couples with one partner carrying translocation or inversion underwent preimplantation genetic testing for chromosomal structural rearrangement (PGT-SR) cycles, including 215 PGT-SR cycles performed in subsequent 164 frozen-thawed embryo transfer cycles and 61 prenatal diagnoses of fetuses and 59 normal live birth babies. A total of 899 samples were processed by whole-genome amplification followed by next-generation sequencing (NGS). Karyotype and chromosome microarray analyses were used to confirm the PGT results from the amniotic fluid samples. RESULTS A total of 843 blastocysts from 124 REC, 21 INV, and 35 ROB carriers were diagnosed by PGT-SR. The percentage of unbalanced blastocysts was significantly higher in REC than in INV and ROB carriers (64.31% vs. 28.05% vs. 37.02%). Stratification analysis of female carrier age and gonadotropin doses showed no significant increase in unbalanced chromosomal abnormalities in the three groups. Also, the different breakpoints in chromosomal arms did not affect the rate of unbalanced chromosomes in the embryos. Logistic regression indicated blastocyst quality as a statistically significant risk factor associated with unbalanced chromosomal abnormalities from translocation carriers (P < 0.001). The source of abnormalities in the three groups showed significant differences such that the abnormalities in REC mostly originated from parental translocation but the abnormalities in INV were mainly de novo variations. 164 blastocysts were transferred, and there were no significant differences in the clinical pregnancy rate and miscarriage rate. A total of 59 healthy babies were born, and there were no significant differences in the gender ratio and birth height, except the birth weight of boys between INV and ROB groups (P = 0.02). The results of amniocentesis revealed that more fetuses have normal chromosomal karyotypes than balanced carriers, particularly in the REC group. CONCLUSIONS Reciprocal translocation carriers have more risk of unbalanced rearrangement, but embryonic chromosome abnormalities of inversion carriers come mainly from de novo variations. This is the first study specifically comparing three different PGT-SRs using the NGS method and evaluating their reproductive outcomes. Our findings will provide the reciprocal translocation, inversion, and Robertsonian translocation carrier couples with more accurate genetic counseling on the reproductive risk of chromosomal imbalance.
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Affiliation(s)
- Ping Yuan
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Lingyan Zheng
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Songbang Ou
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Haijing Zhao
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Ruiqi Li
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - HongJiao Luo
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Xin Tan
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Qingxue Zhang
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China
| | - Wenjun Wang
- IVF Center, Department of Obstetrics and Gynecology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, 510120, Guangdong, China.
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11
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Shao Y, Li J, Lu J, Li H, Zhu Y, Jiang W, Yan J. Clinical outcomes of Preimplantation genetic testing (PGT) application in couples with chromosomal inversion, a study in the Chinese Han population. Reprod Biol Endocrinol 2020; 18:79. [PMID: 32758287 PMCID: PMC7405424 DOI: 10.1186/s12958-020-00635-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 07/29/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Chromosomal inversion was considered to have adverse effects on pregnancy outcomes through abnormal gametogenesis. The purpose of this retrospective study was to investigate whether preimplantation genetic testing (PGT) improves pregnancy outcomes for couples with chromosomal inversion. METHODS A total of 188 cycles from 165 couples with one chromosomal inversion carrier were divided into two groups: PGT (136 cycles, 125 couples) and non-PGT (52 cycles, 50 couples). Biochemical pregnancy, clinical pregnancy, ongoing pregnancy, miscarriage and live birth rates of their first transfer cycles, as well as cumulative live birth rates of each cycle and euploidy rates, were analyzed. RESULTS There were no statistically significant differences in the pregnancy outcomes between the two groups. The euploidy rate of pericentric inversion carriers was not higher than that of paracentric inversion carriers in PGT group (60.71% vs 50.54%, P = 0.073). Similarly, the euploid rate of male carriers was not higher than that of female carriers (61.2% vs 56.1%, P = 0.256). CONCLUSIONS Due to limitation of retrospective study and small sample size, our current data showed that PGT cannot provide prominent benefits for inversion carriers in the Chinese Han population. Further prospective randomized controlled trials are needed to evaluate the effects of PGT.
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Affiliation(s)
- Yuhan Shao
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China
| | - Jing Li
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China
| | - Juanjuan Lu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China
| | - Hongchang Li
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China
| | - Yueting Zhu
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China
| | - Wenjie Jiang
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China
| | - Junhao Yan
- Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.
- National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, 250012, Shandong, China.
- Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, 250012, Shandong, China.
- Shandong Provincial Clinical Medicine Research Center for Reproductive Health, Shandong University, Jinan, 250012, Shandong, China.
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