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Lu W, Zhou J, Rao H, Yuan H, Huang S, Liu Y, Yang B. A Retrospective Analysis of Robertsonian Translocations from a Single Center in China. Reprod Sci 2024; 31:851-856. [PMID: 37932552 PMCID: PMC10912152 DOI: 10.1007/s43032-023-01398-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/27/2023] [Indexed: 11/08/2023]
Abstract
Robertsonian translocations (ROBs) are the most common structural chromosomal abnormalities in the general population, with an estimated incidence rate of 1/1000 births. In this study, we retrospectively analyzed the cases of ROBs from September 2015 to August 2022 and totally identified ROB carriers from 84,569 specimens karyotyped in a single accredited laboratory in China, including 189 cases of balanced ROBs and 3 of mosaic ROBs. Microsoft Excel and descriptive statistics were used to record and analyze the collected data. The male/female ratio of ROBs is 1/1.29, with der(13;14) and der(14;21) being the main karyotypes. Among the 192 patients, 7 were lost to follow-up, 82 had given birth, and 103 were childless (such as miscarriage, fetal chromosomal abnormalities, in vitro fertilization (IVF) failure, or divorce). A total of 44 amniocenteses were performed in 42 couples; ROB cases with natural pregnancies showed that the normal karyotype and balanced ROBs of fetal accounted for 66.67% (16/24), while the results of assisted pregnancies showed 90.00% (18/20). This study represents the largest collections of ROBs in Jiangxi population and reminder that the ROB carriers can achieve the ideal outcome for pregnancy with the appropriate genetic guidance and assisted reproductive technologies (ART).
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Affiliation(s)
- Wan Lu
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Jihui Zhou
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Huihua Rao
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Huizhen Yuan
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Shuhui Huang
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China
| | - Yanqiu Liu
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China.
| | - Bicheng Yang
- Medical Genetic Center, Jiangxi Key Laboratory of Birth Defect Prevention and Control, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China.
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Tian Z, Lian W, Xu L, Long Y, Tang L, Wang H. Robust evidence reveals the reliable rate of normal/balanced embryos for identifying reciprocal translocation and Robertsonian translocation carriers. ZYGOTE 2024; 32:58-65. [PMID: 38083872 DOI: 10.1017/s0967199423000606] [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] [Indexed: 01/16/2024]
Abstract
We aimed to evaluate the reliable rate of normal/balanced embryos for reciprocal translocation and Robertsonian translocation carriers and to provide convincing evidence for clinical staff to conduct genetic counselling regarding common structural rearrangements to alleviate patient anxiety. The characteristics of 39,459 embryos that were sourced from unpublished data and literature were analyzed. The samples consisted of 17,536 embryo karyotypes that were not published and 21,923 embryo karyotypes obtained from the literature. Using the PubMed, Cochrane Library, Web of Science, and Embase databases, specific keywords were used to screen the literature for reciprocal translocation and Robertsonian translocation. The ratio of normal/balanced embryos in the overall data was calculated and analyzed, and we grouped the results according to gender to confirm if there were gender differences. We also divided the data into the cleavage stage and blastocyst stage according to the biopsy period to verify if there was a difference in the ratio of normal/balanced embryos. By combining the unpublished data and data derived from the literature, the average rates of normal/balanced embryos for reciprocal translocation and Robertsonian translocation carriers were observed to be 26.96% (7953/29,495) and 41.59% (4144/9964), respectively. Reciprocal translocation and Robertson translocation exhibited higher rates in male carriers than they did in female carriers (49.60% vs. 37.44%; 29.84% vs. 27.67%). Additionally, the data for both translocations exhibited differences in the normal/balanced embryo ratios between the cleavage and blastocyst stages of carriers for both Robertsonian translocation and reciprocal translocation (36.07% vs 43.43%; 24.88% vs 27.67%). The differences between the two location types were statistically significant (P < 0.05). The normal/balanced ratio of embryos in carriers of reciprocal and RobT was higher than the theoretical ratio, and the values ranged from 26.96% to 41.59%. Moreover, the male carriers possessed a higher number of embryos that were normal or balanced. The ratio of normal/balanced embryos in the blastocyst stage was higher than that in the cleavage stage. The results of this study provide a reliable suggestion for future clinic genetic consulting regarding the rate of normal/balanced embryos of reciprocal translocation and Robertsonian translocation carriers.
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Affiliation(s)
- Zhihua Tian
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming650032, China
| | - Wenchang Lian
- Department of Medical Genetics, Yikon Genomics Company, Ltd, Jiangsu Suzhou215021, China
| | - Li Xu
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming650032, China
| | - Yanxi Long
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming650032, China
| | - Li Tang
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming650032, China
| | - Huawei Wang
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming650032, China
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Tonyan ZN, Puppo IL, Saifitdinova AF, Vavilova TV, Glotov AS. Assessment of quadrivalent characteristics influencing chromosome segregation by analyzing human preimplantation embryos from reciprocal translocation carriers. COMPARATIVE CYTOGENETICS 2024; 18:1-13. [PMID: 38298496 PMCID: PMC10825968 DOI: 10.3897/compcytogen.18.115070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 12/21/2023] [Indexed: 02/02/2024]
Abstract
Patterns of meiotic chromosome segregation were analyzed in cleavage stage and blastocyst stage human embryos from couples with autosomal reciprocal translocations (ART). The influence of quadrivalent asymmetry degree, the presence of terminal breakpoints, and the involvement of acrocentric chromosomes in the rearrangement were analyzed to evaluate their contribution to the formation of non-viable embryos with significant chromosomal imbalance due to pathological segregation patterns and to assess the selection of human embryos by the blastocyst stage. A selection of viable embryos resulting from alternate and adjacent-1 segregation and a significant reduction in the detection frequency of the 3 : 1 segregation pattern were observed in human embryos at the blastocyst stage. The presence of terminal breakpoints increased the frequency of 3 : 1 segregation and was also associated with better survival of human embryos resulting from adjacent-1 mode, reflecting the process of natural selection of viable embryos to the blastocyst stage. The demonstrated patterns of chromosome segregation and inheritance of a balanced karyotype in humans will contribute to optimizing the prediction of the outcomes of in vitro fertilization programs and assessing the risks of the formation of unbalanced embryos for ART carriers.
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Affiliation(s)
- Ziravard N. Tonyan
- D. O. Ott Research Institute of Obstetrics, Gynaecology and Reproductology, 3 Mendeleevskaya Line, 199034, Saint Petersburg, RussiaAlmazov National Medical Research CentreSaint PetersburgRussia
- Almazov National Medical Research Centre, 2 Akkuratova Street, 197341, Saint Petersburg, RussiaD. O. Ott Research Institute of Obstetrics, Gynaecology and ReproductologySaint PetersburgRussia
| | - Irina L. Puppo
- Almazov National Medical Research Centre, 2 Akkuratova Street, 197341, Saint Petersburg, RussiaD. O. Ott Research Institute of Obstetrics, Gynaecology and ReproductologySaint PetersburgRussia
- International Centre for Reproductive Medicine, 53/1 Komendantskij prospect, 197350, Saint Petersburg, RussiaInternational Centre for Reproductive MedicineSaint PetersburgRussia
| | - Alsu F. Saifitdinova
- International Centre for Reproductive Medicine, 53/1 Komendantskij prospect, 197350, Saint Petersburg, RussiaInternational Centre for Reproductive MedicineSaint PetersburgRussia
- Department of Human and Animal Anatomy and Physiology, Herzen State Pedagogical University of Russia, 48 Moyka River Embankment, 191186, Saint Petersburg, RussiaHerzen State Pedagogical University of RussiaSaint PetersburgRussia
| | - Tatyana V. Vavilova
- Almazov National Medical Research Centre, 2 Akkuratova Street, 197341, Saint Petersburg, RussiaD. O. Ott Research Institute of Obstetrics, Gynaecology and ReproductologySaint PetersburgRussia
| | - Andrey S. Glotov
- D. O. Ott Research Institute of Obstetrics, Gynaecology and Reproductology, 3 Mendeleevskaya Line, 199034, Saint Petersburg, RussiaAlmazov National Medical Research CentreSaint PetersburgRussia
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Wu S, Zhang J, Guan Y, Ren B, Zhang Y, Liu X, Wang K, Zhang M, Li Z. Effects of chromosomal translocation characteristics on fertilization and blastocyst development - a retrospective cohort study. BMC Med Genomics 2023; 16:273. [PMID: 37915045 PMCID: PMC10619257 DOI: 10.1186/s12920-023-01715-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/24/2023] [Indexed: 11/03/2023] Open
Abstract
OBJECTIVE To determine the effect of different translocation characteristics on fertilization rate and blastocyst development in chromosomal translocation patients. METHODS This retrospective cohort study was conducted at the Third Affiliated Hospital of Zhengzhou University From January 2017 to December 2022.All couples were diagnosed as reciprocal translocation or Robertsonian translocation by karyotype of peripheral blood lymphocytes test. After adjusting for confounding factors, the effect of chromosomal rearrangement characteristics, such as carrier sex, translocation type, chromosome length and break sites, on fertilization rate and embryo development were analysed separately using multiple linear regression. RESULTS In cases of Robertsonian translocation (RobT), the carrier sex plays an independent role in fertilization rate, and the male carriers was lower than that of female carriers (76.16% vs.86.26%, P = 0.009). In reciprocal translocation (RecT), the carrier sex, chromosome types and break sites had no influence on fertilization rate, blastocyst formation rate (P > 0.05). However, patients with human longer chromosomal (chromosomes 1-5) translocation have a lower available blastocyst formation rate (Group AB vs. Group CD: 41.49%vs.46.01%, P = 0.027). For male carriers, the translocation types was an independent factor affecting the fertilization rate, and the RobT was the negative one (B = - 0.075, P = 0 0.009). In female carriers, we did not observe this difference (P = 0.227). CONCLUSIONS In patients with chromosomal translocation, the fertilization rate may be influenced by carrier sex and translocation type, chromosomes 1-5 translocation may adversely affect the formation of available blastocysts. Break sites have no role in fertilization and blastocyst development.
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Affiliation(s)
- Shanshan Wu
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jianrui Zhang
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yichun Guan
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Bingnan Ren
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yuchao Zhang
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xinmi Liu
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Kexin Wang
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Mingmei Zhang
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhen Li
- Reproductive Medicine Center, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Zhang Z, Zhang L, Wang Y, Bi X, Liang L, Yuan Y, Su D, Wu X. Logistic regression analyses of factors affecting the euploidy of blastocysts undergoing in vitro fertilization and preimplantation genetic testing. Medicine (Baltimore) 2022; 101:e29774. [PMID: 35777007 PMCID: PMC9239646 DOI: 10.1097/md.0000000000029774] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Embryo chromosomal abnormalities are considered as the main cause of low pregnancy rate for in vitro fertilization (IVF). Recently, a new metric of success in assisted reproductive technology, that is, the ability to achieve at least 1 euploid blastocyst for transfer, has been brought into focus among clinicians. Our study aimed to investigate the effects of different factors on the euploidy of blastocysts undergoing IVF and preimplantation genetic testing (PGT). This retrospective observational study included 493 cycles underwent IVF/intracytroplasmatic sperm injection intended to obtain trophectoderm biopsy for PGT from June 2016 to December 2019 at a single academic fertility center. Logistic regression was adopted to analyze the clinical characteristics and embryonic data related to the ability to achieve at least 1 euploid blastocyst for transfer. The study took 1471 blastocysts from 493 cycles as samples for PGT. Among them, 149 cycles (30.22%) had no euploid blastocyst and 344 cycles (69.78%) had at least 1 euploid blastocyst. A multivariate logistic analysis suggested that maternal age >36, abnormal parental karyotype, nonfirst cycles and blastocysts number per cycle <3 were the risk factors for no euploid blastocyst. The parental karyotype, maternal age, number of cycles, and number of blastocysts per cycle were the dominant factors affecting the ability to achieve at least 1 euploid blastocyst for transfer and therefore could be regarded as potential predictors for genetic counseling.
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Affiliation(s)
- Zhiping Zhang
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Lei Zhang
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Yaoqin Wang
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Xingyu Bi
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Lixia Liang
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Yuan Yuan
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Dan Su
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
| | - Xueqing Wu
- Center of Reproductive Medicine, Affiliated Children’s Hospital of Shanxi & Women Health Center of Shanxi Medicine University, Taiyuan, Shanxi, China
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Nakano T, Ammae M, Satoh M, Mizuno S, Nakaoka Y, Morimoto Y. Analysis of clinical outcomes and meiotic segregation modes following preimplantation genetic testing for structural rearrangements using aCGH/NGS in couples with balanced chromosome rearrangement. Reprod Med Biol 2022; 21:e12476. [PMID: 35781920 PMCID: PMC9243298 DOI: 10.1002/rmb2.12476] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 06/13/2022] [Accepted: 06/13/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose To retrospectively evaluate the effectiveness of PGT‐SR by array comparative genomic hybridization (aCGH) or next‐generation sequencing (NGS) in preventing recurrent miscarriages. Methods Thirty one couples with balanced translocation who underwent 68 PGT‐SR cycles between 2012 and 2020 were evaluated. A total of 242 blastocysts were biopsied for aCGH or NGS. The genetically transferable blastocysts were transferred in the subsequent frozen‐thawed single embryo transfer cycle. Results The genetically transferable blastocyst rate was 21.2% (51/241). Thirty five genetically transferable blastocysts were transferred into the uterine cavity. The clinical pregnancy rate was 57.1% (20/35), and the ongoing pregnancy rate was 100.0% (20/20). The incidence of interchromosomal effect (ICE) was influenced by ovarian stimulation protocol, female age, and carrier's gender, but dependent on the types of balanced translocation carriers. Furthermore, there was no significant difference in meiotic segregation modes in ovarian stimulation protocols and carrier's gender. Interestingly, the incidence of adjacent‐1 segregation in ≧40 years group increased significantly compared with <35 years group. Conclusions For the first time in Japan, we show the effectiveness of PGT‐SR using aCGH or NGS, which enables comprehensive analysis of chromosomes, in the prevention of recurrent miscarriages. Furthermore, our results may support better genetic counseling of balanced translocation carriers for PGT‐SR cycles.
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Snider AC, Darvin T, Spor L, Akinwole A, Cinnioglu C, Kayali R. Criteria to evaluate patterns of segmental and complete aneuploidies in preimplantation genetic testing for aneuploidy results suggestive of an inherited balanced translocation or inversion. F S Rep 2021; 2:72-79. [PMID: 34223276 PMCID: PMC8244368 DOI: 10.1016/j.xfre.2020.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/19/2020] [Accepted: 12/12/2020] [Indexed: 11/01/2022] Open
Abstract
Objective To define criteria for determining when preimplantation genetic testing for aneuploidy (PGT-A) results are suggestive of a potential balanced chromosomal rearrangement in the egg or sperm source and warrant karyotyping. Design Performance evaluation of criteria developed to assess PGT-A results for patterns of imbalances suggestive of a balanced chromosomal rearrangement in the egg or sperm source. Setting A single PGT-A laboratory and multiple in vitro fertilization centers. Patients Reproductive couples who underwent routine PGT-A testing. Interventions Karyotyping of reproductive couples for whom patterns of imbalances observed in PGT-A results suggested a balanced chromosomal rearrangement in the egg or sperm source. Main Outcome Measures Correct or incorrect flagging of predicted translocation in either the egg or sperm source based on chromosome analysis. Results Proposed criteria correctly predicted a balanced reciprocal translocation in 97% of cases (n = 33), a (13;14) Robertsonian translocation in all cases (n = 3), and an inversion in all cases (n = 2). Other criteria evaluated were determined to be ineffective because of relatively low occurrences that met the criteria and/or low predictive value. Conclusions Our results showed that the proposed criteria were effective for evaluating patterns of imbalances observed in PGT-A results suggestive of a potential chromosomal rearrangement in the egg or sperm source. Our proposed criteria can be employed by clinicians in the in vitro fertilization setting in combination with a patient's reproductive history to identify PGT-A patients who are likely carriers of balanced chromosomal rearrangements.
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Cai Y, Ding M, Zhang Y, Sun Y, Lin F, Diao Z, Zhou J. A mathematical model for predicting the number of transferable blastocysts in next-generation sequencing-based preimplantation genetic testing. Arch Gynecol Obstet 2021; 305:241-249. [PMID: 34218301 DOI: 10.1007/s00404-021-06050-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 03/27/2021] [Indexed: 12/23/2022]
Abstract
PURPOSE To investigate the clinical factors that could be used predict the number of transferable blastocysts in preimplantation genetic testing (PGT) cycles based on next-generation sequencing (NGS) and formed form a mathematical model to predict the chance likelihood of obtaining one transferable blastocyst, which is helpful for genetic counseling. METHODS This retrospective study enrolled couples undergoing PGT cycles for chromosomal structural rearrangement (PGT-SR, n = 363, 202 with reciprocal translocation carriers, 131 with Robertsonian translocation carriers, 30 with inversion carriers), monogenic diseases (PGT-M, n = 47), and for Aneuploidies (PGT-A, n = 132) from January 2015 to October 2018. Stepwise multiple linear regression analysis was used to identify the factors relevant for obtaining at least one transferable blastocyst. The factors that predict the number of biopsied blastocysts were further analyzed. RESULTS The transferable blastocyst rates were 29.94, 41.99, 49.09, 41.42, and 44.37% in the reciprocal translocation carrier, Robertsonian translocation carrier, inversion carrier, PGT-M, and PGT-A cycles, respectively. The number of transferable blastocysts in these cycles were 0.3004 × the number of biopsied blastocysts (NBB) - 0.0031, 0.4063 × NBB + 0.0460, 0.5762 × NBB - 0.3128, 0.3611 × NBB + 0.1910, and 0.4831 × NBB - 0.0970, respectively. Furthermore, the number of MII oocytes and female age were clinical predictors of NBB in reciprocal translocation and PGT-A couples, while the number of MII oocytes was the only clinical predictor in Robertsonian translocation carriers, inversion carriers, and PGT-M couples. CONCLUSIONS The number of biopsied blastocysts was the only clinical predictor of the ability to obtain a transferable blastocyst in PGT cycles; therefore, for clinical practice, theoretically the minimum numbers of biopsied blastocysts is 4 in reciprocal translocation carrier and 3 in couples undergoing PGT for other reasons. The number of MII oocytes and female age were clinical predictors of the number of biopsied blastocysts. With the mathematical models in our study as a reference, in clinical practice, clinicians will be able to conduct a more targeted genetic consultation for different kinds of PGT patients.
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Affiliation(s)
- Yunni Cai
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China
| | - Min Ding
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China
| | - YuTing Zhang
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China
| | - Yanxin Sun
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China
| | - Fei Lin
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China
| | - Zhenyu Diao
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China
| | - Jianjun Zhou
- Reproductive Medicine Center, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321#, Nanjing, 210008, Jiangsu, People's Republic of China.
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Mostafa Nayel D, Salah El Din Mahrous H, El Din Khalifa E, Kholeif S, Mohamed Elhady G. The Effect of Teratozoospermia on Sex Chromosomes in Human Embryos. APPLICATION OF CLINICAL GENETICS 2021; 14:125-144. [PMID: 33732009 PMCID: PMC7959001 DOI: 10.2147/tacg.s299349] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 02/19/2021] [Indexed: 01/02/2023]
Abstract
Purpose The aim of this study is to evaluate the effect of abnormal semen morphology on the frequency of sex chromosomal abnormalities in embryos obtained by ICSI, which represents the first to be studied in Egyptian population. Methods Forty-two couples suffering from male infertility due to teratozoospermia were divided into two groups: patients with severe and moderate teratozoospermia (group A and B, respectively). All involved couples were subjected to careful history taking and had a normal clinical examination and karyotype. Females were subjected to hormonal assays, pelvic ultrasound, hysterosalpingography and yielded normal results, while male partners were subjected to computerized semen analysis. Preimplantation genetic diagnosis was performed for all suitably developed embryos including embryo biopsy, fixation of biopsied cells and fluorescent in situ hybridization (FISH) analysis. Results Couples included in the two groups were found to be homogenous in terms of age of both partners and duration of infertility. Interpretation of FISH results was performed by evaluation of embryos’ chromosomal constitution as regards abnormalities in chromosomes X, Y and 18. Twenty-seven embryos (48.2%) were found chromosomally abnormal in group A, while only 14 embryos (25.0%) were found chromosomally abnormal in group B. Aneuploidies involved only sex chromosomes were tripled in group A embryos when compared to their frequency in group B embryos (26.8% and 8.3%, respectively) with statistically significant difference between the two groups (p=0.002). Monosomies were the most common type of aneuploidy and were significantly higher in group A (14.3%) when compared to group B (3.6%) (p=0.047). Embryos with mosaic abnormalities were more common in group A (12.5%) when compared to group B (3.6%), however not statistically significantly different (p= 0.162). A significant difference between the two studied groups as regards the total number of potentially viable chromosomal abnormalities detected and the potentially viable sex chromosomal aneuploidies detected (p<0.001 and p=0.002), respectively. Conclusion The cases with severe teratozoospermia undergoing ICSI treatment can display a higher rate of sex chromosome aneuploidies in their embryos (threefold) than cases with moderate teratozoospermia.
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Affiliation(s)
- Dalia Mostafa Nayel
- Department of Human Genetics, Medical Research Institute, Alexandria University, Alexandria, Egypt
| | | | - Emad El Din Khalifa
- Department of Obstetrics and Gynecology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Soha Kholeif
- Department of Human Genetics, Medical Research Institute, Alexandria University, Alexandria, Egypt
| | - Ghada Mohamed Elhady
- Department of Human Genetics, Medical Research Institute, Alexandria University, Alexandria, Egypt
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Benn P. Uniparental disomy: Origin, frequency, and clinical significance. Prenat Diagn 2021; 41:564-572. [PMID: 33179335 DOI: 10.1002/pd.5837] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/28/2020] [Accepted: 09/29/2020] [Indexed: 02/06/2023]
Abstract
Uniparental disomy (UPD) is defined as two copies of a whole chromosome derived from the same parent. There can be multiple mechanisms that lead to UPD; these are reviewed in the context of contemporary views on the mechanism leading to aneuploidy. Recent studies indicate that UPD is rare in an apparently healthy population and also rare in spontaneous abortion tissues. The most common type of UPD is a maternal heterodisomy (both maternal allele sets present). Isodisomy (a duplicated single set of alleles) or segmental loss of heterozygosity is sometimes encountered in SNP-based microarray referrals. Decisions regarding the most appropriate follow-up testing should consider the possibility of consanguinity (that will generally involve multiple regions), an imprinted gene disorder (chromosomes 6, 7, 11, 14, 15, 20), expression of an autosomal recessive disorder, and an occult aneuploid cell line that may be confined to the placenta. Upd(16)mat, per se, does not appear to be associated with an abnormal phenotype. UPD provides an insight into the history of early chromosome segregation error and understanding the rates and fate of these events are of key importance in the provision of fertility management and prenatal healthcare.
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Affiliation(s)
- Peter Benn
- Department of Genetics and Genome Sciences, UConn Health, Farmington, Connecticut, USA
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In vitro fertilization outcomes after preimplantation genetic testing for chromosomal structural rearrangements comparing fluorescence in-situ hybridization, microarray comparative genomic hybridization, and next-generation sequencing. F S Rep 2020; 1:249-256. [PMID: 34223252 PMCID: PMC8244371 DOI: 10.1016/j.xfre.2020.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/18/2020] [Accepted: 09/21/2020] [Indexed: 12/22/2022] Open
Abstract
Objective To compare in vitro fertilization (IVF) outcomes for preimplantation genetic testing for chromosomal structural rearrangements (PGT-SR) using various testing platforms. Design Retrospective cohort. Setting Large academic IVF center. Patient(s) Fifty-one balanced translocation carriers undergoing IVF with PGT-SR who completed a total of 91 cycles, including 31 fluorescence in-situ hybridization (FISH), 24 microarray comparative genomic hybridization (aCGH), and 36 next-generation sequencing (NGS) testing cycles. Intervention(s) PGT-SR. Main Outcome Measure(s) Primary outcome of live-birth rate and secondary outcomes including implantation rate, clinical loss rate, and percentages of normal or balanced, unbalanced, and aneuploid embryos detected. Result(s) There was no statistically significant difference in LBR, though there was a tendency toward a higher LBR for NGS testing (14 of 19, 73.7%) compared with FISH (8 of 18, 44.4%) and aCGH (10 of 20, 50.0%). The implantation rate was statistically significantly higher for NGS (16 of 20, 80.0%) compared with FISH (11 of 25, 44.0%) and aCGH (16 of 30, 53.3%). There was no statistically significant difference in clinical pregnancy losses. There was a lower percentage of normal or balanced embryos with FISH (12.5%) compared with aCGH (23.7%) and with NGS (20.7%). Conclusion(s) This is the first report of PGT-SR outcomes for translocation carriers directly comparing PGT-SR using FISH, aCGH, and NGS. Our findings suggest an improvement in pregnancy outcomes parallel to the advancement in technology and are reassuring for continued use of NGS for this population.
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Interchromosomal effect in carriers of translocations and inversions assessed by preimplantation genetic testing for structural rearrangements (PGT-SR). J Assist Reprod Genet 2019; 36:2547-2555. [PMID: 31696386 DOI: 10.1007/s10815-019-01593-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 09/24/2019] [Indexed: 02/06/2023] Open
Abstract
PURPOSE Balanced carriers of structural rearrangements have an increased risk of unbalanced embryos mainly due to the production of unbalanced gametes during meiosis. Aneuploidy for other chromosomes not involved in the rearrangements has also been described. The purpose of this work is to know if the incidence of unbalanced embryos, interchromosomal effect (ICE) and clinical outcomes differ in carriers of different structural rearrangements. METHODS Cohort retrospective study including 359 preimplantation genetic testing cycles for structural rearrangements from 304 couples was performed. Comparative genomic hybridisation arrays were used for chromosomal analysis. The results were stratified and compared according to female age and carrier sex. The impact of different cytogenetic features of chromosomal rearrangements was evaluated. RESULTS In carriers of translocations, we observed a higher percentage of abnormal embryos from day 3 biopsies compared with day 5/6 biopsies and for reciprocal translocations compared with other rearrangements. We observed a high percentage of embryos with aneuploidies for chromosomes not involved in the rearrangement that could be attributed to total ICE (aneuploid balanced and unbalanced embryos). No significant differences were observed in these percentages between types of rearrangements. Pure ICE (aneuploid balanced embyos) was independent of female age only for Robertsonian translocations, and significantly increased in day 3 biopsies for all types of abnormalities. Furthermore, total ICE for carriers of Robertsonian translocations and biopsy on day 3 was independent of female age too. High ongoing pregnancy rates were observed for all studied groups, with higher pregnancy rate for male carriers. CONCLUSION We observed a higher percentage of abnormal embryos for reciprocal translocations. No significant differences for total ICE was found among the different types of rearrangements, with higher pure ICE only for Robertsonian translocations. There was a sex effect for clinical outcome for carriers of translocations, with higher pregnancy rate for male carriers. The higher incidence of unbalanced and aneuploid embryos should be considered for reproductive counselling in carriers of structural rearrangements.
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Cai Y, Ding M, Lin F, Diao Z, Zhang N, Sun H, Zhou J. Evaluation of preimplantation genetic testing based on next-generation sequencing for balanced reciprocal translocation carriers. Reprod Biomed Online 2019; 38:669-675. [PMID: 30885668 DOI: 10.1016/j.rbmo.2018.12.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 11/26/2018] [Accepted: 12/12/2018] [Indexed: 12/15/2022]
Abstract
RESEARCH QUESTION Can next-generation sequencing (NGS) based on copy number variation sequencing (CNV-Seq) identify normal/balanced embryos in balanced reciprocal translocation carriers and what are their reproductive outcomes? DESIGN One hundred couples with balanced reciprocal translocation who underwent a total of 134 preimplantation genetic testing (PGT) cycles between January 2015 and October 2017 were evaluated. Trophectoderm cells of blastocysts were biopsied for CNV-Seq-based NGS. All the balanced/normal blastocysts were vitrified and cryopreserved. Single balanced/normal blastocysts were warmed and transferred in the subsequent frozen embryo transfer (FET) cycle. RESULTS During the study period, 400 blastocysts were analysed by NGS-PGT, of which 109 (27.25%) were balanced and euploid. A total of 52 blastocysts were transferred in the FET cycle. Clinical pregnancy was confirmed in 34 women (65.38%), with a miscarriage rate of 2.94%; 26 healthy term babies were born, including 24 singletons and one set of twins, while eight couples had ongoing pregnancies. Amniocentesis revealed a fetal chromosome status that was consistent with the NGS-PGT results. Female carriers had a significantly higher blastocyst rate than did the male carriers (37.01% versus 31.27%, P = 0.04). The transferable blastocyst rate was higher in couples treated with gonadotrophin-releasing hormone (GnRH) antagonist than in those treated with GnRH agonist (38.20% versus 24.37%, P = 0.01). However, neither carrier sex nor ovarian stimulation protocol influenced the clinical pregnancy rate. CONCLUSIONS CNV-Seq-based NGS is an efficient and reliable PGT method for balanced reciprocal translocation.
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Affiliation(s)
- Yunni Cai
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing Jiangsu 210008, China
| | - Min Ding
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing Jiangsu 210008, China
| | - Fei Lin
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital, The Affiliated Hospital to Nanjing University Medical School, Nanjing Jiangsu 210008, China
| | - Zhenyu Diao
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital, The Affiliated Hospital to Nanjing University Medical School, Nanjing Jiangsu 210008, China
| | - Ningyuan Zhang
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital, The Affiliated Hospital to Nanjing University Medical School, Nanjing Jiangsu 210008, China
| | - Haixiang Sun
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital, The Affiliated Hospital to Nanjing University Medical School, Nanjing Jiangsu 210008, China
| | - Jianjun Zhou
- Reproductive Medicine Centre, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing Jiangsu 210008, China; Reproductive Medicine Centre, Nanjing Drum Tower Hospital, The Affiliated Hospital to Nanjing University Medical School, Nanjing Jiangsu 210008, China.
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Cuman C, Beyer CE, Brodie D, Fullston T, Lin JI, Willats E, Zander-Fox D, Mullen J. Defining the limits of detection for chromosome rearrangements in the preimplantation embryo using next generation sequencing. Hum Reprod 2018; 33:1566-1576. [DOI: 10.1093/humrep/dey227] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/24/2018] [Accepted: 06/11/2018] [Indexed: 01/09/2023] Open
Affiliation(s)
- C Cuman
- Monash IVF, 1/152 Clayton Rd, Clayton, Victoria, Australia
| | - C E Beyer
- Monash IVF, 1/152 Clayton Rd, Clayton, Victoria, Australia
| | - D Brodie
- Monash IVF, 1/152 Clayton Rd, Clayton, Victoria, Australia
| | - T Fullston
- Repromed, 180 Fullarton Road, Dulwich, South Australia, Australia
| | - J I Lin
- Monash IVF, 1/152 Clayton Rd, Clayton, Victoria, Australia
| | - E Willats
- Monash IVF, 1/152 Clayton Rd, Clayton, Victoria, Australia
| | - D Zander-Fox
- Repromed, 180 Fullarton Road, Dulwich, South Australia, Australia
| | - J Mullen
- Monash IVF, 1/152 Clayton Rd, Clayton, Victoria, Australia
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