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Xp;Yq Unbalanced Translocation with Pseudoautosomal Region Aberrations in a Natural Two-Generation Transmission. BIOMED RESEARCH INTERNATIONAL 2020; 2020:4976204. [PMID: 33344636 PMCID: PMC7732387 DOI: 10.1155/2020/4976204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 11/12/2020] [Accepted: 11/23/2020] [Indexed: 12/03/2022]
Abstract
Translocations involving X and Y chromosomes rarely occur in humans and may affect reproductive function. We investigated an Xp:Yq unbalanced translocation with pseudoautosomal region (PAR) aberrations in a natural two-generation transmission. We report the case of an azoospermic male and his fertile mother without any other abnormal clinical phenotypes, except for short stature. Cytogenetic methods, including karyotyping and fluorescence in situ hybridization (FISH), revealed the translocation. Chromosomal microarray comparative genomic hybridization (array-CGH) was used to investigate the regions of Xp partial deletion and Yq partial duplication. Final chromosome karyotypes in the peripheral blood of the infertile male and his mother were 46,Y,der(X)t(X;Y)(p22.33;q11.22) and 46,X,der(X)t(X;Y)(p22.33;q11.22), respectively. Short-stature-homeobox gene deletion was responsible for the short stature in both subjects. PAR aberrations and AZFc duplication may be a direct genetic risk factor for spermatogenesis. This report further supports the use of routine karyotype analysis, FISH-based technology, and array-CGH analysis to identify derivative chromosomes in a complex rearrangement.
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Bispo AVS, Burégio-Frota P, Oliveira dos Santos L, Leal GF, Duarte AR, Araújo J, Cavalcante da Silva V, Muniz MTC, Liehr T, Santos N. Y chromosome in Turner syndrome: detection of hidden mosaicism and the report of a rare X;Y translocation case. Reprod Fertil Dev 2015; 26:1176-82. [PMID: 25294360 DOI: 10.1071/rd13207] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Accepted: 09/13/2013] [Indexed: 12/15/2022] Open
Abstract
Turner syndrome (TS) is a common genetic disorder in females associated with the absence of complete or parts of a second sex chromosome. In 5-12% of patients, mosaicism for a cell line with a normal or structurally abnormal Y chromosome is identified. The presence of Y-chromosome material is of medical importance because it results in an increased risk of developing gonadal tumours and virilisation. Molecular study and fluorescence in situ hybridisation approaches were used to study 74 Brazilian TS patients in order to determine the frequency of hidden Y-chromosome mosaicism, and to infer the potential risk of developing malignancies. Additionally, we describe one TS girl with a very uncommon karyotype 46,X,der(X)t(X;Y)(p22.3?2;q11.23) comprising a partial monosomy of Xp22.3?2 together with a partial monosomy of Yq11.23. The presence of cryptic Y-chromosome-specific sequences was detected in 2.7% of the cases. All patients with Y-chromosome-positive sequences showed normal female genitalia with no signs of virilisation. Indeed, the clinical data from Y-chromosome-positive patients was very similar to those with Y-negative results. Therefore, we recommend that the search for hidden Y-chromosome mosaicism should be carried out in all TS cases and not be limited to virilised patients or carriers of a specific karyotype.
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Affiliation(s)
- Adriana Valéria Sales Bispo
- Departamento de Genética, Universidade Federal de Pernambuco. Av. da Engenharia, s/n, Cidade Universitária, 50740-600, Recife, PE, Brasil
| | - Pollyanna Burégio-Frota
- Laboratório de Pesquisa Translacional Prof. C. Anthony Hart, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Rua dos Coelhos 300, Boa Vista, 50070-050, Recife, PE, Brasil
| | - Luana Oliveira dos Santos
- Departamento de Genética, Universidade Federal de Pernambuco. Av. da Engenharia, s/n, Cidade Universitária, 50740-600, Recife, PE, Brasil
| | - Gabriela Ferraz Leal
- Unidade de Genética Pediátrica, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Rua dos Coelhos 300 Boa Vista. 50070-050, Recife, PE, Brasil
| | - Andrea Rezende Duarte
- Unidade de Genética Pediátrica, Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Rua dos Coelhos 300 Boa Vista. 50070-050, Recife, PE, Brasil
| | - Jacqueline Araújo
- Unidade de Endocrinologia Pediátrica, Hospital das Clínicas HC/UFPE, Av. da Engenharia, s/n, Cidade Universitária, 50740-600, Recife, PE, Brasil
| | - Vanessa Cavalcante da Silva
- Laboratório de Erros Inatos do Metabolismo-EIM, Universidade Federal de São Paulo-UNIFESP, Rua Sena Madureira 1500, Vila Mariana, 04021-001, São Paulo, SP, Brasil
| | | | - Thomas Liehr
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743 Jena, Germany
| | - Neide Santos
- Departamento de Genética, Universidade Federal de Pernambuco. Av. da Engenharia, s/n, Cidade Universitária, 50740-600, Recife, PE, Brasil
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Dobek WA, Kim HG, Walls CA, Chorich LP, Tho SP, Wang ZX, McDonough PG, Layman LC. Long-term follow-up of females with unbalanced X;Y translocations-reproductive and nonreproductive consequences. Mol Cytogenet 2015; 8:13. [PMID: 25737742 PMCID: PMC4347569 DOI: 10.1186/s13039-015-0112-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/19/2015] [Indexed: 11/10/2022] Open
Abstract
Background Females with Xp;Yq translocations manifest short stature and normal fertility, but rarely have follow-up. The study purpose was to define the phenotype of a family with t(X;Y)(p22.3;q11.2), determine long-term reproductive function, and compare to all reported female cases. Methods Comprehensive clinical and molecular analyses were performed on the female proband, who had regular menses, normal endocrine function, and three pregnancies spanning seven years--a normal liveborn male and two with unbalanced translocations (liveborn female and stillborn male). Results The translocation truncated KAL1 and deleted 44 genes on der(X). Our report constitutes the longest follow-up of an X;Y translocation female. She had no evidence of Kallmann syndrome, gonadoblastoma, or cardiovascular disease. Detailed analysis of 50 published female cases indicated a uniform lack of follow-up and significant morbidity—intellectual disability (10%), facial dysmorphism (28%), eye abnormalities (14%), and skeletal defects (28%). Conclusions Our findings indicate normal ovarian function to date in a woman with an t(X;Y)(p22.3;q11.2). However, additional published studies in the literature suggest careful follow-up is necessary and contradict the generalization that females with Xp;Yq translocations are usually normal except for short stature. Electronic supplementary material The online version of this article (doi:10.1186/s13039-015-0112-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Whitney A Dobek
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA
| | - Hyung-Goo Kim
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA ; Section of Reproductive Endocrinology, Infertility, & Genetics, Medical College of Georgia, Georgia Regents University, Augusta, GA USA
| | - Cedric A Walls
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA
| | - Lynn P Chorich
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA ; Section of Reproductive Endocrinology, Infertility, & Genetics, Medical College of Georgia, Georgia Regents University, Augusta, GA USA
| | - Sandra Pt Tho
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA ; Section of Reproductive Endocrinology, Infertility, & Genetics, Medical College of Georgia, Georgia Regents University, Augusta, GA USA
| | - Zi-Xuan Wang
- Department of Surgery and Department of Pathology, Anatomy & Cell Biology, Thomas Jefferson University, Philadelphia, PA USA
| | - Paul G McDonough
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA ; Section of Reproductive Endocrinology, Infertility, & Genetics, Medical College of Georgia, Georgia Regents University, Augusta, GA USA
| | - Lawrence C Layman
- Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, Augusta, GA USA ; Section of Reproductive Endocrinology, Infertility, & Genetics, Medical College of Georgia, Georgia Regents University, Augusta, GA USA ; Section of Reproductive Endocrinology, Infertility, & Genetics, Department of Obstetrics & Gynecology, Medical College of Georgia, Georgia Regents University, 1120 15th Street, Augusta, GA USA
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Karyotype determination and reproductive guidance for short stature women with a hidden Y chromosome fragment. Reprod Biomed Online 2013; 27:89-95. [PMID: 23664816 DOI: 10.1016/j.rbmo.2013.03.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 03/21/2013] [Accepted: 03/26/2013] [Indexed: 12/30/2022]
Abstract
Two unrelated couples came to the Reproductive and Genetic Hospital of Citic-Xiangya to ask for reproductive guidance. One couple had an affected son and the other couple had secondary infertility. Conventional GTG banding showed that the women in both couples had a 46,X,add(X)(p22) karyotype. Further molecular cytogenetic studies showed that both women had a 46,X,der(X)t(X;Y)(p22;q11.2) karyotype and that the affected boy had inherited the derivative X chromosome, which resulted in an Xp contiguous gene syndrome. After an assessment of reproductive risk, the first couple conceived naturally and opted for prenatal diagnosis (PND) by amniocentesis. No abnormal karyotypes were found for the twin pregnancy and healthy twin girls were born after a full-term normal pregnancy. The second couple chose to undergo IVF with preimplantation genetic diagnosis (PGD). Two PGD cycles were performed by fluorescence in-situ hybridization. In the first PGD cycle, all three embryos had abnormal hybridization signals. In the second cycle, a male embryo with normal hybridization signals was transferred into the womb and a normal pregnancy was achieved. The results show the importance of detecting the derivative chromosome followed by PND or PGD if a woman carries an Xp;Yq translocation.
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