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Militaru MS, Babliuc IM, Bloaje-Florică VL, Danci VA, Filip-Deac I, Kutasi E, Simon V, Militaru M, Cătană A. The Impact of Chromosomal Mosaicisms on Prenatal Diagnosis and Genetic Counseling-A Narrative Review. J Pers Med 2024; 14:774. [PMID: 39064028 PMCID: PMC11277968 DOI: 10.3390/jpm14070774] [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: 06/14/2024] [Revised: 07/13/2024] [Accepted: 07/19/2024] [Indexed: 07/28/2024] Open
Abstract
Genetic disorders represent a high-impact diagnosis for both patients and their families. Prenatal screening methods and, when recommended, genetic testing allow parents to make informed decisions about the course a pregnancy is going to take. Although offering certainty about the potential evolution and prognosis of the pregnancy, and then the newborn, is usually not possible, genetic counseling can offer valuable insights into genetic disorders. Chromosomal mosaicisms are genetic anomalies that affect only some cell lines in either the fetus or the placenta or both. They can affect autosomal or heterosomal chromosomes, and they can be either numerical or structural. The prognosis seems to be more severe if the genetic alterations are accompanied by malformations visible in ultrasounds. Several genetic techniques can be used to diagnose certain mosaicisms, depending on their nature. A novel approach in prenatal care is non-invasive prenatal screening (NIPS), also known as non-invasive prenatal testing (NIPT), which, although it does not always have diagnostic value, can provide valuable information about potential genetic anomalies, especially numerical, with high sensitivity (Se).
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Affiliation(s)
- Mariela Sanda Militaru
- Department of Molecular Sciences, Faculty of Medicine, University of Medicine and Pharmacy “Iuliu Hatieganu”, 400012 Cluj-Napoca, Romania; (M.S.M.); (A.C.)
- Regional Laboratory Cluj-Napoca, Department of Medical Genetics, Regina Maria Health Network, 400363 Cluj-Napoca, Romania
| | - Ioana-Mădălina Babliuc
- Department for Mother and Child Health, Pediatric 1, Emergency County Hospital, No. 68 Motilor Street, 400394 Cluj-Napoca, Romania; (I.-M.B.); (V.-A.D.); (V.S.)
| | | | - Valentin-Adrian Danci
- Department for Mother and Child Health, Pediatric 1, Emergency County Hospital, No. 68 Motilor Street, 400394 Cluj-Napoca, Romania; (I.-M.B.); (V.-A.D.); (V.S.)
| | - Iulia Filip-Deac
- County Emergency Clinical Hospital, 50 Dr. Gheorghe Marinescu Street, 540136 Târgu Mureș, Romania;
| | - Enikő Kutasi
- Department of Molecular Sciences, Faculty of Medicine, University of Medicine and Pharmacy “Iuliu Hatieganu”, 400012 Cluj-Napoca, Romania; (M.S.M.); (A.C.)
- Department for Mother and Child Health, Pediatric 1, Emergency County Hospital, No. 68 Motilor Street, 400394 Cluj-Napoca, Romania; (I.-M.B.); (V.-A.D.); (V.S.)
| | - Vasile Simon
- Department for Mother and Child Health, Pediatric 1, Emergency County Hospital, No. 68 Motilor Street, 400394 Cluj-Napoca, Romania; (I.-M.B.); (V.-A.D.); (V.S.)
- Department of Urology, University of Medicine and Pharmacy “Iuliu Hatieganu”, 11 Tăbăcarilor Street, 400139 Cluj-Napoca, Romania
| | - Mihai Militaru
- Pediatric 2 Discipline, University of Medicine and Pharmacy “Iuliu Hatieganu”, Emergency County Hospital, No. 3-5 Clinicilor Street, 400535 Cluj-Napoca, Romania;
| | - Andreea Cătană
- Department of Molecular Sciences, Faculty of Medicine, University of Medicine and Pharmacy “Iuliu Hatieganu”, 400012 Cluj-Napoca, Romania; (M.S.M.); (A.C.)
- Regional Laboratory Cluj-Napoca, Department of Medical Genetics, Regina Maria Health Network, 400363 Cluj-Napoca, Romania
- Department of Oncogenetics, Institute of Oncology, “Prof. Dr. I. Chiricuță”, 400015 Cluj-Napoca, Romania
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Lan F, Chen Z, Lin X. Systematic analysis and evaluation of chromosome aberrations in major birth defects associated with infertility. Intractable Rare Dis Res 2024; 13:29-35. [PMID: 38404732 PMCID: PMC10883841 DOI: 10.5582/irdr.2023.01100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 02/27/2024] Open
Abstract
Previous studies have indicated an elevated risk of infertility in certain birth defects, including congenital heart disease (CHD), hypospadias, cryptorchidism, and disorders of sexual development (DSD). Although the identification of chromosomal abnormalities or chromosomal aberrations (CAs) is crucial for the diagnosis of these conditions, the assessment of CAs in these disorders remains unclear, and few large-scale studies have been conducted at multiple centers. The aim of the current study was to systematically evaluate the prevalence of CAs in CHD, hypospadias, cryptorchidism, and DSD. Studies reporting CAs in these birth defects were retrospectively analyzed from 1991- 2023, using online databases such as PubMed and Google scholar as well as preprints and references from related literature. Comprehensive screening, data acquisition, and systematic assessments of the identified literature were performed. Ultimately, searches yielded a total of 7,356 samples from 14 published articles on CHD, 298 hypospadias cases from 4 published articles, 1,681 cryptorchidism cases from 4 published articles, and 2,876 DSD cases from 7 published articles. Carrier rates of CAs varied widely among these studies and conditions. A retrospective analysis revealed that CHD was associated with the highest carrier rate (26%) for CAs, followed by DSD (21%), hypospadias (9%), and cryptorchidism (5%). A subtype analysis of CAs indicated a higher prevalence of numerical abnormalities among the reported cases. Therefore, considering CAs in birth defects associated with infertility is imperative. This provides a foundation for the further clinical implementation of chromosomal screening and enhancing high-risk screening for individuals in the real world.
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Affiliation(s)
- Fuying Lan
- Department of Urology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhongzhong Chen
- Department of Urology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Urogenital Development Research Center, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoling Lin
- Department of Urology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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He Y, Guo L, Zheng L, Ren C, Wang T, Lu J. Clinical and molecular cytogenetic findings and pregnancy outcomes of fetuses with isochromosome Y. Mol Cytogenet 2022; 15:32. [PMID: 35927742 PMCID: PMC9351221 DOI: 10.1186/s13039-022-00611-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/21/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The mosaic forms and clinical phenotypes of fetuses with isochromosome Y are difficult to predict. Therefore, we summarized the cases of nine fetuses with isochromosome Y identified in prenatal diagnosis with a combination of molecular cytogenetic techniques, providing clinical evidence for prenatal genetic counseling. METHODS The prenatal diagnosis and pregnancy outcomes of nine fetuses with isochromosome Y were obtained by a retrospective analysis. Isochromosome Y was identified prenatally by different approaches, such as conventional karyotyping, chromosomal microarray analysis (CMA), quantitative fluorescent polymerase chain reaction (QF-PCR) and fluorescence in situ hybridization (FISH). RESULTS Seven idic(Y) fetuses and two i(Y) fetuses were identified. One fetus was complete for i(Y)(p10), and the rest with 45,X had mosaic forms. A break and fusion locus was identified in Yp11.3 in one fetus, in Yq11.22 in six fetuses and in Yp10 in two fetuses. The CMA results suggested that different deletions and duplications were found on the Y chromosome. The deletion fragments ranged from 4.7 Mb to the entire Y chromosome, and the duplication fragments ranged from 10.4 to 18.0 Mb. QF-PCR analysis suggested that the AZF region was intact in one fetus, four fetuses had AZFb+c+d deletion, one fetus had AZFa+b+c+d deletion, and one fetus had AZFc+d deletion. Finally, four healthy male neonates were delivered successfully, but the parents of the remaining five fetuses, including three healthy and two unhealthy fetuses, chose to terminate their pregnancies. CONCLUSION The fetus and neonate phenotype of prenatally detected isochromosome Y usually is that of a normally developed male, ascertained in the absence of other indicators of a fetal structural anomaly. Our study provides clinical reference materials for risk assessment and permits better prenatally counseling and preparation of parents facing the birth of isochromosome Y fetuses.
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Affiliation(s)
- Yiqun He
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, 521-523 Xingnan Road, Guangzhou, 511442, Guangdong, China
| | - Li Guo
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, 521-523 Xingnan Road, Guangzhou, 511442, Guangdong, China
| | - Laiping Zheng
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, 521-523 Xingnan Road, Guangzhou, 511442, Guangdong, China
| | - Congmian Ren
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, 521-523 Xingnan Road, Guangzhou, 511442, Guangdong, China
| | - Ting Wang
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, 521-523 Xingnan Road, Guangzhou, 511442, Guangdong, China
| | - Jian Lu
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, 521-523 Xingnan Road, Guangzhou, 511442, Guangdong, China.
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Xu Y, Pang Q. Repetitive DNA Sequences in the Human Y Chromosome and Male Infertility. Front Cell Dev Biol 2022; 10:831338. [PMID: 35912115 PMCID: PMC9326358 DOI: 10.3389/fcell.2022.831338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 05/24/2022] [Indexed: 11/13/2022] Open
Abstract
The male-specific Y chromosome, which is well known for its diverse and complex repetitive sequences, has different sizes, genome structures, contents and evolutionary trajectories from other chromosomes and is of great significance for testis development and function. The large number of repetitive sequences and palindrome structure of the Y chromosome play an important role in maintaining the stability of male sex determining genes, although they can also cause non-allelic homologous recombination within the chromosome. Deletion of certain Y chromosome sequences will lead to spermatogenesis disorders and male infertility. And Y chromosome genes are also involved in the occurrence of reproductive system cancers and can increase the susceptibility of other tumors. In addition, the Y chromosome has very special value in the personal identification and parentage testing of male-related cases in forensic medicine because of its unique paternal genetic characteristics. In view of the extremely high frequency and complexity of gene rearrangements and the limitations of sequencing technology, the analysis of Y chromosome sequences and the study of Y-gene function still have many unsolved problems. This article will introduce the structure and repetitive sequence of the Y chromosome, summarize the correlation between Y chromosome various sequence deletions and male infertility for understanding the repetitive sequence of Y chromosome more systematically, in order to provide research motivation for further explore of the molecules mechanism of Y-deletion and male infertility and theoretical foundations for the transformation of basic research into applications in clinical medicine and forensic medicine.
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Affiliation(s)
- Yong Xu
- Department of Emergency Surgery, Jining NO 1 People’s Hospital, Jining, China
| | - Qianqian Pang
- Institute of Forensic Medicine and Laboratory Medicine, Jining Medical University, Jining, China
- *Correspondence: Qianqian Pang,
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Chen CP, Chern SR, Chen SW, Wu FT, Lee CC, Chen LF, Chen YY, Wang W. High-level mosaicism for 45,X in 45,X/46,X,idic(Y)(q11.2) at amniocentesis in a pregnancy with a favorable outcome and postnatal progressive decrease of the 45,X cell line. Taiwan J Obstet Gynecol 2022; 61:528-531. [PMID: 35595452 DOI: 10.1016/j.tjog.2022.03.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/03/2022] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVE We present prenatal diagnosis of high-level mosaicism for 45,X in 45,X/46,X,idic(Y)(q11.2) at amniocentesis in a pregnancy with a favorable outcome and postnatal progressive decrease of the 45,X cell line. CASE REPORT A 36-year-old, gravida 4, para 3, woman underwent amniocentesis at 17 weeks of gestation because of advanced maternal age. Amniocentesis revealed a karyotype of 45,X[22]/46,X,idic(Y)(q11.2)[4]. Prenatal ultrasound was unremarkable, and the fetus had normal male external genitalia. Repeat amniocentesis was performed at 20 weeks of gestation, and the second amniocentesis revealed a karyotype of 45,X[24]/46,X,idic(Y)(q11.2)[3]. Simultaneous interphase fluorescence in situ hybridization (FISH) analysis on uncultured amniocytes revealed that 60% (62/103 cells) were Y-deleted cells. After genetic counseling, the parents decided to continue the pregnancy, and a 3020-g male baby was delivered with a body length of 52 cm, normal male genital organs and no phenotypic abnormalities. The karyotypes of cord blood, umbilical cord and placenta were 45,X[20]/46,X,idic(Y)(q11.2)[20], 45,X[31]/46,X,idic(Y)(q11.2)[9] and 45,X[40], respectively. At age one month, FISH analysis on urinary cells and buccal mucosal cells revealed 11.5% (7/61 cells) and 13.6% (16/118 cells), respectively for mosaicism for the Y-deleted cells. At age five month, the karyotype of peripheral blood was 45,X[9]/46,X,idic(Y)(q11.2)[31]. FISH analysis on buccal mucosal cells showed no abnormal Y-deleted cell (0/101 cells). At age 11 month, the karyotype of peripheral blood was 45,X[5]/46,X,idic(Y)(q11.2)[35]. FISH analysis on 102 buccal mucosal cells showed no abnormal signals. The infant was doing well with normal physical and psychomotor development. CONCLUSION High-level mosaicism for 45,X in 45,X/46,X,idic(Y)(q11.2) at amniocentesis can be associated with a favorable outcome and progressive decrease of the 45,X cell line.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Institute of Clinical and Community Health Nursing, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
| | - Schu-Rern Chern
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
| | - Shin-Wen Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Fang-Tzu Wu
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chen-Chi Lee
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Li-Feng Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Yun-Yi Chen
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
| | - Wayseen Wang
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
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Liu Y, Wang G, Zhang F, Dai L. An NGS-based approach to identify Y-chromosome variation in non-obstructive azoospermia. Andrologia 2021; 53:e14201. [PMID: 34350635 DOI: 10.1111/and.14201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/13/2021] [Accepted: 07/16/2021] [Indexed: 11/29/2022] Open
Abstract
Copy number variations (CNVs), including deletions and duplications on the Y chromosome, are known genetic factors in azoospermia. Therefore, it is important to identify novel pathogenic CNVs related to azoospermia. In this study, we compared CNVs detected by STS-PCR and NGS in 107 individuals with nonobstructive azoospermia (NOA). STS-PCR analysis revealed that 8.14% (9/107) of patients had AZF deletions. The highest percentage of deletions was located in the AZFc region, followed by AZFa and AZFb+c. Positive CNVs, including four duplications, six deletions and three complex CNVs, were detected using NGS methods in 12.15% (13/107) of NOA patients. Both the duplications and deletions detected in q11.223 were confirmed to increase the genetic risk for NOA. A comparison between the STS-PCR results and NGS methods revealed concordant CNV-positive results in 4 of 107 cases (3.74%). The discrepancies included 6 cases with CNVs identified by NGS but not detected by STS-PCR, and two cases were detected by STS-PCR but not by NGS. Notably, four duplications were not identified and three complex CNVs were detected as simple deletions using STS-PCR analysis. The NGS method provides comprehensive results in detecting Y chromosome-linked CNVs, including deletions and duplications, which might broaden our understanding of NOA.
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Affiliation(s)
- Yongjie Liu
- Reproductive Center, Yinchuan Maternity and Child Health Care Hospital, Yinchuan, China
| | - Guoping Wang
- Reproductive Center, Yinchuan Maternity and Child Health Care Hospital, Yinchuan, China
| | - Fan Zhang
- Reproductive Center, Yinchuan Maternity and Child Health Care Hospital, Yinchuan, China
| | - Liang Dai
- Reproductive Center, Yinchuan Maternity and Child Health Care Hospital, Yinchuan, China
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