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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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Puppo IL, Saifitdinova AF, Loginova YA, Kinunen AA, Tonyan ZN, Pastukhova YR, Leontyeva OA, Kuznetsova RA, Chiryaeva OG, Pendina AA, Efimova OA, Tikhonov AV, Petrovskaia-Kaminskaia AV, Dudkina VS, Petrova LI, Polyakova IV, Shcherbak SG, Glotov OS, Bichevaya NK. Y/15 and Y/22 Derivative Chromosomes in Couples with Reproductive Failures: Algorithm of Preimplantation Genetic Testing and Specificity of Inheritance. RUSS J GENET+ 2020. [DOI: 10.1134/s1022795420040110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Mary N, Villagómez DAF, Revay T, Rezaei S, Donaldson B, Pinton A, King WA. Meiotic Synapsis and Gene Expression Altered by a Balanced Y-Autosome Reciprocal Translocation in an Azoospermic Pig. Sex Dev 2018; 12:256-263. [PMID: 30179878 DOI: 10.1159/000491804] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2018] [Indexed: 12/16/2022] Open
Abstract
Meiotic sex chromosome silencing (MSCS) has been argued as a prerequisite for normal meiotic cell division progression during the synaptic prophase I stage. Furthermore, irregular asynapsis of autosomal axes at meiosis may be encompassing the lack of transcriptional activity normally observed for the X and Y sex chromosomes. Therefore, any chromosomal rearrangement compromising the normal mechanism of MSCS and/or the contrary, the normal meiotic transcriptional activity of autosomal chromosomes, may be observed as a meiotic and concomitant spermatogenesis arrest. Previously, we have described a Y-autosome translocation t(Y;13)(p1.3;q3.3) in an azoospermic boar. Its chromosome synapsis behavior by synaptonemal complex immunostaining and FISH analyses is documented here. Histone γH2AX protein foci appeared to be located at unsynapsed chromosomal segments (e.g., X chromosome univalents or unpaired multivalent segments), although interestingly a high proportion of primary spermatocytes showed full paired synaptonemal complex-multivalent configurations which were devoid of a γH2AX focus signal, indicating meiotic chromosome silencing. RT-qPCR analysis of testicular expression showed downregulation of 3 SSC13 genes (MLH1, SOX2, UBE2B) and upregulation of SSCY genes (ZFY, SRY). The irregularity of the normal transcription pattern in case of these genes with proven roles in the testis is in agreement with the cytological observations and could contribute to the observed phenotype.
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An infertile azoospermic male with 45,X karyotype and a unique complex (Y;14); (Y;22) translocation: cytogenetic and molecular characterization. J Assist Reprod Genet 2018; 35:1503-1508. [PMID: 29860576 DOI: 10.1007/s10815-018-1211-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 05/10/2018] [Indexed: 10/14/2022] Open
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5
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Mareri A, Iezzi M, Salvatore A, Ligas C, D'Alessandro E. A unique case of growth hormone and human chorionic gonadotropin treatment in a 45,X male with Y: autosome translocation and literature review. J Pediatr Endocrinol Metab 2016; 29:857-62. [PMID: 27054600 DOI: 10.1515/jpem-2015-0427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 02/22/2016] [Indexed: 11/15/2022]
Abstract
Maleness associated with a 45,X karyotype is a rare condition in childhood. It is usually diagnosed in adult age because of infertility. We report a unique case of an unbalanced translocation t(Y;21) in a 14-year-old boy with 45,X karyotype referred because of short stature, thin habitus and puberty delay. Hormone analysis showed low serum levels of basal testosterone, insulin-like growth factor (IGF-I) and gonadotrophins. Diagnosis of GH deficiency and puberty delay were made. He was treated with human chorionic gonadotropin (hCG) and GH therapy, respectively, for 6 and 24 months.
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MESH Headings
- Adolescent
- Chorionic Gonadotropin/genetics
- Chorionic Gonadotropin/metabolism
- Chorionic Gonadotropin/therapeutic use
- Chromosome Deletion
- Chromosomes, Human, Pair 21
- Chromosomes, Human, X
- Chromosomes, Human, Y
- Cytogenetic Analysis
- Drug Therapy, Combination
- Growth Disorders/etiology
- Growth Disorders/prevention & control
- Human Growth Hormone/genetics
- Human Growth Hormone/metabolism
- Human Growth Hormone/therapeutic use
- Humans
- In Situ Hybridization, Fluorescence
- Male
- Noonan Syndrome/diagnosis
- Noonan Syndrome/drug therapy
- Noonan Syndrome/genetics
- Noonan Syndrome/physiopathology
- Puberty, Delayed/etiology
- Puberty, Delayed/prevention & control
- Recombinant Proteins/metabolism
- Recombinant Proteins/therapeutic use
- Thinness/etiology
- Thinness/prevention & control
- Translocation, Genetic
- Treatment Outcome
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6
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FISH and array CGH characterization of de novo derivative Y chromosome (Yq duplication and partial Yp deletion) in an azoospermic male. Reprod Biomed Online 2015; 31:217-24. [PMID: 26096031 DOI: 10.1016/j.rbmo.2015.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 04/17/2015] [Accepted: 04/21/2015] [Indexed: 12/12/2022]
Abstract
This study presents a 28-year-old infertile male who was referred to the cytogenetic laboratory for chromosomal analysis after 4 years of regular unprotected intercourse in whom non-obstructive azoospermia was revealed. Standard cytogenetic G-banding was performed on metaphase spreads and a de-novo karyotype 46,X,der(Y)(q11.22;p11.3) was identified. This analysis was followed by flourescence in-situ hybridization(FISH) and array comparative genomic hybridization (aCGH). Finally, the patient's karyotype was identified as 46,X,der(Y)(qter→q11.221::p11.31→qter).ish der(Y) (qter+,pter-,SHOX+,SRY+,Ycen+,DYZ3+;DYZ1+,qter+).arrYq11.221q12(14,448,863-59,288,511) x2, Yp11.32p11.31(104,062-266,388) x0. It is proposed that de-novo derivative monocentric Y chromosome with duplicated region Y qter→q11.221::p11.31→qter with partial deletion of Yp PAR1 region most probably can perturb the conjugation of sex chromosomes during first meiotic division of spermatogenic arrested differentiation (development).
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7
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Hemmat M, Hemmat O, Boyar FZ. Isochromosome Yp and jumping translocation of Yq resulting in five cell lines in an infertile male: a case report and review of the literature. Mol Cytogenet 2013; 6:36. [PMID: 24020961 PMCID: PMC3848363 DOI: 10.1186/1755-8166-6-36] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 08/14/2013] [Indexed: 11/25/2022] Open
Abstract
Background Jumping translocations are a rare type of mosaicism in which the same portion of one donor chromosome is translocated to several recipient chromosomes. Constitutional forms of jumping translocations are rare, and the 48 cases reported to date have been associated with both normal and abnormal phenotypes. Concurrence of isochromosome (i) of one arm and translocation of the other is also rare, with seven reported cases. We describe a unique case involving concurrence of i(Yp) and a jumping translocation of Yq to the telomere of chromosomes 12q and 17q, which resulted in five cell lines. Case presentation The patient, an otherwise healthy 35-year-old man, was referred for cytogenetic studies because of absolute azoospermia. He had elevated levels of follicle stimulating hormone and luteinizing hormone, consistent with abnormal spermatogenesis, and decreased levels of free testosterone and inhibin B. G-banded chromosome analysis revealed a mosaic male karyotype involving five abnormal cell lines. One of the cell lines showed loss of chromosome Y and presence of i(Yp) as the sole abnormality. Three cell lines exhibited jumping translocation: two involved 17qter, and the other involved 12qter as the recipient and Yq as the common donor chromosome. One of the cell lines with der(17) additionally showed i(Yp). The other der(17) and der(12) cell lines had a missing Y chromosome. All five cell lines were confirmed by FISH. Subtelomric FISH study demonstrated no loss of chromosome material from the recipient chromosomes at the translocation junctions. Conclusions We postulate that a postzygotic pericentromeric break of the Y chromosome led to formation of isochromosome Yp, whereas Yq formed a jumping translocation through recombination between its internal telomere repeats and telomeric repeats of recipient chromosomes. This in turn led to either pairing or an exchange at the complimentary sequences. Such translocation junctions appear to be unstable and to result in a jumping translocation. Cryptic deletion or disruption of AZF (azoospermic factor) genes at Yq11 during translocation or defective pairing of X and Y chromosomes during meiosis, with abnormal sex vesicle formation and consequent spermatogenetic arrest, might be the main cause of the azoospermia in our patient.
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Affiliation(s)
- Morteza Hemmat
- Cytogenetics Department, Quest Diagnostics Nichols Institute, 33608 Ortega Highway, San Juan Capistrano, CA 92690, USA
| | - Omid Hemmat
- Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
| | - Fatih Z Boyar
- Cytogenetics Department, Quest Diagnostics Nichols Institute, 33608 Ortega Highway, San Juan Capistrano, CA 92690, USA
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Ferfouri F, Boitrelle F, Clement P, Molina Gomes D, Selva J, Vialard F. Sperm FISH analysis of a 44,X,der(Y),t(Y;15)(q12;q10)pat,rob(13;14)(q10;q10)mat complex chromosome rearrangement. Andrologia 2013; 46:576-82. [DOI: 10.1111/and.12112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2013] [Indexed: 01/15/2023] Open
Affiliation(s)
- F. Ferfouri
- Department of Reproductive Biology, Cytogenetics, Gynecology and Obstetrics; Poissy Saint Germain Hospital; Poissy France
- EA 2493; University of Versailles Saint-Quentin-en-Yvelines; Versailles France
| | - F. Boitrelle
- Department of Reproductive Biology, Cytogenetics, Gynecology and Obstetrics; Poissy Saint Germain Hospital; Poissy France
- EA 2493; University of Versailles Saint-Quentin-en-Yvelines; Versailles France
| | | | - D. Molina Gomes
- Department of Reproductive Biology, Cytogenetics, Gynecology and Obstetrics; Poissy Saint Germain Hospital; Poissy France
- EA 2493; University of Versailles Saint-Quentin-en-Yvelines; Versailles France
| | - J. Selva
- Department of Reproductive Biology, Cytogenetics, Gynecology and Obstetrics; Poissy Saint Germain Hospital; Poissy France
- EA 2493; University of Versailles Saint-Quentin-en-Yvelines; Versailles France
| | - F. Vialard
- Department of Reproductive Biology, Cytogenetics, Gynecology and Obstetrics; Poissy Saint Germain Hospital; Poissy France
- EA 2493; University of Versailles Saint-Quentin-en-Yvelines; Versailles France
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9
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Dutta UR, Pidugu VK, Goud CV, Hoefers C, Hagemann M, Dalal A. Identification and molecular cytogenetic characterization of a novel complex Y chromosome rearrangement in a boy with disorder of sexual development. Gene 2013; 519:374-80. [PMID: 23428792 DOI: 10.1016/j.gene.2013.01.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 01/20/2013] [Accepted: 01/28/2013] [Indexed: 11/18/2022]
Abstract
Ambiguous genitalia or disorder of the sexual development is a birth defect where the external genitals do not have the typical appearance of either a male or female. Here we report a boy with ambiguous genitalia and short stature. The cytogenetic analysis by G-banding revealed a small Y chromosome and an additional material on the 15p arm. Further, molecular cytogenetic analysis by Fluorescence in situ hybridization (FISH) using whole chromosome paint probes showed the presence of Y sequences on the 15p arm, confirming that it is a Y;15 translocation. Subsequent, FISH with centromere probe Y showed two signals depicting the presence of two centromeres and differing with a balanced translocation. The dicentric nature of the derivative 15 chromosome was confirmed by FISH with both 15 and Y centromeric probes. Further, the delineation of the Y chromosomal DNA was also done by quantitative real time PCR. Additional Y-short tandem repeat typing was performed to find out the extent of deletion on small Y chromosome. Fine mapping was carried out with 8 Y specific BAC clones which helped in defining the breakpoint regions. MLPA was performed to check the presence or absence of subtelomeric regions and SHOX regions on Y. Finally array CGH helped us in confirming the breakpoint regions. In our study we identified and characterized a novel complex Y chromosomal rearrangement with a complete deletion of the Yq region and duplication of the Yp region with one copy being translocated onto the15p arm. This is the first report of novel and unique Y complex rearrangement showing a deletion, duplication and a translocation in the same patient. The possible mechanism of the rearrangement and the phenotype-genotype correlation are discussed.
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Affiliation(s)
- Usha R Dutta
- Centre for DNA Fingerprinting and Diagnostics, Nampally, Hyderabad-500 001, India.
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Novel Y chromosome breakpoint in an infertile male with a de novo translocation t(Y;16): a case report. J Assist Reprod Genet 2012; 29:1427-30. [PMID: 23151880 PMCID: PMC3528878 DOI: 10.1007/s10815-012-9886-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 10/29/2012] [Indexed: 11/08/2022] Open
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Affiliation(s)
- Horacio Rivera
- Instituto Mexicano del Seguro Social and Universidad de Guadalajara, Guadalajara, Mexico
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12
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Meiotic segregation of X-autosome translocation in two carriers and implications for assisted reproduction. Reprod Biomed Online 2009; 18:850-5. [DOI: 10.1016/s1472-6483(10)60036-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Mancini A, Zollino M, Leone E, Grande G, Festa R, Lecce R, Pontecorvi A, Neri G. A case of 45,X male: genetic reevaluation and hormonal and metabolic follow-up in adult age. Fertil Steril 2008; 90:2011.e17-21. [PMID: 18778815 DOI: 10.1016/j.fertnstert.2008.07.1723] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2008] [Revised: 07/04/2008] [Accepted: 07/09/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To report a case of a 45,X man, a rare condition with a clinical course that has not been dealt with by any previous article in the literature. DESIGN Case report. SETTING University Genetic Center and Endocrine Clinic. PATIENT(S) A 41-year-old man, already known by our genetics center for a 45,X chromosome constitution and a normal male differentiation, came back with requests on his sexual and fertility potential. Twenty-one years ago, high-resolution analysis of prometaphase chromosomes revealed additional euchromatic material on a 15-p chromosome, and in situ hybridization with Y-specific probe pDP105 gave positive signal on 15p11.2, suggesting a t(Yp;15p) translocation. INTERVENTION(S) Fluorescence in situ hybridization analyses on metaphase chromosomes, standard oral glucose tolerance test, dynamic hormone assays, semen analysis, and dual-energy x-ray absorptiometry. MAIN OUTCOME MEASURE(S) Reexamination at clinical, genetic, hormonal, and metabolic level. RESULT(S) The derivative chromosome 15 was characterized as der(15)(Ypter-->q11.21::15p11.2-->qter). The patient's findings satisfied the criteria of the metabolic syndrome. Hypergonadotropinemic hypotestosteronemia was diagnosed. CONCLUSION(S) Our study offers new insights into the natural history of this condition and suggests that hypogonadism could play a role in the development of metabolic syndrome.
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Chen CP, Lin SP, Tsai FJ, Wang TH, Chern SR, Wang W. Characterization of a de novo unbalanced Y;autosome translocation in a 45,X mentally retarded male and literature review. Fertil Steril 2008; 90:1198.e11-8. [PMID: 18304539 DOI: 10.1016/j.fertnstert.2007.11.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2007] [Revised: 11/19/2007] [Accepted: 11/19/2007] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To describe the molecular and cytogenetic characterization of a de novo unbalanced Y;autosome translocation in a 45,X mentally retarded male. DESIGN Descriptive case study and literature review. SETTING Tertiary medical center. PATIENT(S) A 17-year-old 45,X mentally retarded male with no stigmata of Turner syndrome. INTERVENTION(S) Molecular and cytogenetic investigations, physical examination, and hormonal assays. MAIN OUTCOME MEASURE(S) Cytogenetic analysis, fluorescence in situ hybridization (FISH), array comparative genomic hybridization (CGH), and polymorphic DNA marker analysis. RESULT(S) The FISH showed a Y/18p translocation. Array CGH revealed a loss of distal chromosome 18p material and a loss of part of Yq material corresponding to deletions of chromosomal segments of 18pter-->18p11.2 and Yq11.221-->Yqter. Polymorphic DNA markers analysis showed that the X chromosome was of maternal origin and the deletion of 18p was of paternal origin. CONCLUSION(S) This study confirms the usefulness of array CGH in the detection of subtle chromosomal rearrangements resulting in an unbalanced Y;autosome translocation.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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Kékesi A, Erdei E, Török M, Drávucz S, Tóth A. Segregation of chromosomes in spermatozoa of four Hungarian translocation carriers. Fertil Steril 2007; 88:212.e5-11. [PMID: 17274993 DOI: 10.1016/j.fertnstert.2006.11.097] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2006] [Revised: 10/10/2006] [Accepted: 11/15/2006] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To determine the segregation pattern of the translocated chromosomes in spermatozoa of human males with translocations. DESIGN Retrospective case-control study. SETTING Hospital-based genetic laboratory for reproductive biology. PATIENT(S) A carrier with Y-autosome reciprocal translocation, two with autosome-autosome reciprocal translocations, and one with Robertsonian translocation. INTERVENTION(S) Blood sample and sperm sample collection from each translocation carrier. MAIN OUTCOME MEASURE(S) Fluorescence in situ hybridization on lymphocyte slides to characterize each translocation case. Fluorescence in situ hybridization with specific DNA probes for each of the sperm samples to characterize the chromosomes involved in the rearrangement and to evaluate the possible interchromosomal effect for chromosomes 18, X, and Y. RESULT(S) Each translocation carrier showed a specific mode of segregation pattern of the translocated chromosomes, confirming the dependence on chromosomes involved in the translocation. The highest frequency from alternate segregation was with the carrier of Robertsonian translocation (90.9%), and the lowest was with the carrier of Y-autosome translocation (29.7%). No evidence of an interchromosomal effect for chromosomes 18, X, and Y were detected. CONCLUSION(S) Depending on the rate of the genetically normal and abnormal segregation modes, we can evaluate the chance of having a healthy proband. These results ensure more accurate genetic counseling for patients in assisted reproduction centers.
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Affiliation(s)
- Anna Kékesi
- Department of Obstetrics and Gynecology, Medical Health Center, Budapest, Hungary
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Morales C, Soler A, Bruguera J, Madrigal I, Alsius M, Obon M, Margarit E, Sánchez A. Pseudodicentric 22;Y translocation transmitted through four generations of a large family without phenotypic repercussion. Cytogenet Genome Res 2007; 116:319-23. [PMID: 17431332 DOI: 10.1159/000100418] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2006] [Accepted: 12/22/2006] [Indexed: 11/19/2022] Open
Abstract
The most frequent Y-autosome translocations involve an acrocentric autosome and they are frequently familial with neither phenotypic nor reproductive repercussion. However, different Y-autosome translocations have been related to infertility, due to abnormal pairing of the X and Y chromosomes at meiosis and an abnormal XY-body formation or by the disruption of the AZFs (Azoospermic Factor). Rare forms of Y-autosome translocations are those resulting in an unbalanced 45-chromosome karyotype that includes a dicentric Y+autosome chromosome. We describe a new case of a familial pseudodicentric 22;Y that is carried by 19 male members of a large family without phenotypic repercussion. Cytogenetic analysis, fluorescence in situ hybridisation (FISH) and subtelomeric Multiplex Ligation-dependent Probe Amplification (MLPA) assay have been performed. All male members of the family showed the karyotype 45,X,psu dic(22;Y)(p11.2;qter).ish psu dic(22;Y) (SRY+,DYZ3+,D14/D22Z1+). In conclusion, the presence of the dicentric chromosome in the male members of the family reported does not seem to interfere with the correct progression of spermatogenesis.
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Affiliation(s)
- C Morales
- Fundació Clínic per a la Recerca Biomèdica, Barcelona, Spain
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Wimmer R, Schempp W, Gopinath PM, Nagarajappa CS, Chandra N, Palaniappan I, Hansmann I. A family case of fertile human 45,X,psu dic(15;Y) males. Cytogenet Genome Res 2006; 115:94-8. [PMID: 16974089 DOI: 10.1159/000094806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2005] [Accepted: 01/27/2006] [Indexed: 11/19/2022] Open
Abstract
We report on a familial case including four male probands from three generations with a 45,X,psu dic(15;Y)(p11.2;q12) karyotype. 45,X is usually associated with a female phenotype and only rarely with maleness, due to translocation of small Y chromosomal fragments to autosomes. These male patients are commonly infertile because of missing azoospermia factor regions from the Y long arm. In our familial case we found a pseudodicentric translocation chromosome, that contains almost the entire chromosomes 15 and Y. The translocation took place in an unknown male ancestor of our probands and has no apparent effect on fertility and phenotype of the carrier. FISH analysis demonstrated the deletion of the pseudoautosomal region 2 (PAR2) from the Y chromosome and the loss of the nucleolus organizing region (NOR) from chromosome 15. The formation of the psu dic(15;Y) chromosome is a reciprocal event to the formation of the satellited Y chromosome (Yqs). Statistically, the formation of 45,X,psu dic(15;Y) (p11.2;q12) is as likely as the formation of Yqs. Nevertheless, it has not been described yet. This can be explained by the dicentricity of this translocation chromosome that usually leads to mitotic instability and meiotic imbalances. A second event, a stable inactivation of one of the two centromeres is obligatory to enable the transmission of the translocation chromosome and thus a stably reduced chromosome number from father to every son in this family.
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Affiliation(s)
- R Wimmer
- Institut für Humangenetik, Klinikum der Ludwig-Maximilians-Universität, München, Germany.
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Brisset S, Izard V, Misrahi M, Aboura A, Madoux S, Ferlicot S, Schoevaert D, Soufir JC, Frydman R, Tachdjian G. Cytogenetic, molecular and testicular tissue studies in an infertile 45,X male carrying an unbalanced (Y;22) translocation: case report. Hum Reprod 2005; 20:2168-72. [PMID: 15845593 DOI: 10.1093/humrep/dei034] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
(Y;autosome) translocations have been reported in association with male infertility. Different mechanisms have been suggested to explain the male infertility, such as deletion of the azoospermic factor (AZF) on the long arm of the Y chromosome, or meiosis impairment. We describe a new case with a de novo unbalanced translocation t(Y;22) and discuss the genotype-phenotype correlation. A 36 year old male with azoospermia was found to have a mosaic 45,X/46,X, + mar karyotype. Fluorescence in situ hybridization (FISH) showed the presence of a derivative Y chromosome containing the short arm, the centromere and a small proximal part of the long-arm euchromatin of the Y chromosome and the long arm of chromosome 22. The unstable small marker chromosome included the short arm and the centromere of chromosome 22. This unbalanced translocation t(Y;22)(q11.2;q11.1) generated the loss of the long arm of the Y chromosome involving a large part of AZFb, AZFc and Yq heterochromatin regions. Testicular tissue analyses showed sperm in the wet preparation. Our case shows the importance of documenting (Y;autosome) translocations with molecular and testicular tissue analyses.
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Affiliation(s)
- S Brisset
- Service de Génétique et Reproduction and Service de Gynécologie-Obstétrique, Hôpital Antoine Béclère, 92140 Clamart, France.
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Kellermayer R, Czakó M, Kiss-László Z, Gyuris P, Kozári A, Melegh B, Kosztolányi G. α-thalassemia/mental retardation syndrome in a 45,X male. Am J Med Genet A 2005; 132A:431-3. [PMID: 15633163 DOI: 10.1002/ajmg.a.30499] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
An unbalanced Y;autosome translocation leading to a male with a 45,X karyotype is rare with about 30 published cases. A male with a 45,X karyotype as a result of a unique, submicroscopic, unbalanced Y;16 translocation is presented with alpha-thalassemia/mental retardation syndrome.
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Affiliation(s)
- Richard Kellermayer
- Department of Medical Genetics and Child Development, University of Pécs, Hungary.
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Current awareness in prenatal diagnosis. Prenat Diagn 2002; 22:638-44. [PMID: 12124707 DOI: 10.1002/pd.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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