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El Amrani Z, Elalaoui SC, Jdioui W, Sbiti A, Ratbi I, Liehr T, Sefiani A, Natiq A. Complex translocation leading to13q interstitial deletion in a Moroccan child with retinoblastoma and intellectual disability. Ophthalmic Genet 2022; 43:689-692. [PMID: 35658784 DOI: 10.1080/13816810.2022.2083183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Retinoblastoma (RB) is the most common malignant intraocular tumor in children; it affects their eyes often even prenatally. RB may be sporadic or familial, due to germinal mutation in RB1 gene or by abnormal chromosomal abnormalities involving RB1 gene, located in 13q14. Monosomy of subband 13q14 as a partial deletion can also be responsible for RB with additional symptoms. The latter may be RB associated with psychomotor retardation, macrocephaly, broad forehead, thick earlobes, and bulbous nose. MATERIALS AND METHODS We present here the case of a boy from a consanguineous marriage with bilateral retinoblastoma, intellectual disability and facial dysmorphic features. Classical and molecular cytogenetics were used to recognize genotype-phenotype association. RESULTS The karyotype showed a three way translocation involving chromosomes 5, 12 and 13. Further molecular cytogenetics analysis revealed a deletion of 13q14 involving the tumor suppressor gene RB1. CONCLUSION This case highlights the impact of classical and molecular cytogenetics in diagnosis of rare genetic syndromes and for the genetic counselling of patients and their families. Pure molecular karyotyping analyses would miss the underlying chromosomal mechanism leading to the rearrangement.
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Affiliation(s)
- Zhour El Amrani
- RABAT Research team in genomics and molecular epidemiology of genetic diseases, Genomics Center of Human Pathologies, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Morocco
| | - Siham Chafai Elalaoui
- RABAT Research team in genomics and molecular epidemiology of genetic diseases, Genomics Center of Human Pathologies, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Morocco
| | - Wafae Jdioui
- médicale, Centre des consultations et des explorations externes, Hopital d'enfants, CHU Ibn SinaConsultation de génétique, Rabat, Marocco
| | - Aziza Sbiti
- RABAT Research team in genomics and molecular epidemiology of genetic diseases, Genomics Center of Human Pathologies, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Morocco
| | - Ilham Ratbi
- RABAT Research team in genomics and molecular epidemiology of genetic diseases, Genomics Center of Human Pathologies, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Morocco
| | - Thomas Liehr
- Institute of Human Genetics, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Abdelaziz Sefiani
- RABAT Research team in genomics and molecular epidemiology of genetic diseases, Genomics Center of Human Pathologies, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Morocco
| | - Abdelhafid Natiq
- RABAT Research team in genomics and molecular epidemiology of genetic diseases, Genomics Center of Human Pathologies, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Morocco
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Fabian ID, Khetan V, Stacey AW, Allen Foster, Ademola-Popoola DS, Berry JL, Cassoux N, Chantada GL, Hessissen L, Kaliki S, Kivelä TT, Luna-Fineman S, Munier FL, Reddy MA, Rojanaporn D, Blum S, Sherief ST, Staffieri SE, Theophile T, Waddell K, Ji X, Astbury NJ, Bascaran C, Burton M, Zondervan M, Bowman R. Sex, gender, and retinoblastoma: analysis of 4351 patients from 153 countries. Eye (Lond) 2021; 36:1571-1577. [PMID: 34272514 PMCID: PMC9307655 DOI: 10.1038/s41433-021-01675-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 06/14/2021] [Accepted: 06/25/2021] [Indexed: 01/26/2023] Open
Abstract
Objective To investigate in a large global sample of patients with retinoblastoma whether sex predilection exists for this childhood eye cancer. Methods A cross-sectional analysis including 4351 treatment-naive retinoblastoma patients from 153 countries who presented to 278 treatment centers across the world in 2017. The sex ratio (male/female) in the sample was compared to the sex ratio at birth by means of a two-sided proportions test at global level, country economic grouping, continent, and for selected countries. Results For the entire sample, the mean retinoblastoma sex ratio, 1.20, was higher than the weighted global sex ratio at birth, 1.07 (p < 0.001). Analysis at economic grouping, continent, and country-level demonstrated differences in the sex ratio in the sample compared to the ratio at birth in lower-middle-income countries (n = 1940), 1.23 vs. 1.07 (p = 0.019); Asia (n = 2276), 1.28 vs. 1.06 (p < 0.001); and India (n = 558), 1.52 vs. 1.11 (p = 0.008). Sensitivity analysis, excluding data from India, showed that differences remained significant for the remaining sample (χ2 = 6.925, corrected p = 0.025) and for Asia (χ2 = 5.084, corrected p = 0.036). Excluding data from Asia, differences for the remaining sample were nonsignificant (χ2 = 2.205, p = 0.14). Conclusions No proof of sex predilection in retinoblastoma was found in the present study, which is estimated to include over half of new retinoblastoma patients worldwide in 2017. A high male to female ratio in Asian countries, India in specific, which may have had an impact on global-level analysis, is likely due to gender discrimination in access to care in these countries, rather than a biological difference between sexes.
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Affiliation(s)
- Ido Didi Fabian
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK. .,The Goldschleger Eye Institute, Sheba Medical Center, Tel Hashomer, Tel-Aviv University, Tel-Aviv, Israel.
| | | | - Andrew W Stacey
- Department of Ophthalmology, University of Washington, Seattle, WA, USA
| | - Allen Foster
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK
| | - Dupe S Ademola-Popoola
- University of Ilorin Teaching Hospital, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - Jesse L Berry
- Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Nathalie Cassoux
- Institut Curie, Université de Paris Medicine Paris V Descartes, Paris, France
| | | | - Laila Hessissen
- Pediatric Hematology and Oncology Department of Rabat, Mohammed V University, Rabat, Morocco
| | - Swathi Kaliki
- The Operation Eyesight Universal Institute for Eye Cancer, L V Prasad Eye Institute, Hyderabad, India
| | - Tero T Kivelä
- Ocular Oncology Service, Department of Ophthalmology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Sandra Luna-Fineman
- Hematology/Oncology/SCT, Center for Global Health, Children's Hospital Colorado, University of Colorado, Aurora, CO, USA
| | - Francis L Munier
- Jules-Gonin Eye Hospital, Fondation Asile de Aveugles, University of Lausanne, Lausanne, Switzerland
| | - M Ashwin Reddy
- The Royal London Hospital, Barts Health NHS Trust, London, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Duangnate Rojanaporn
- Department of Ophthalmology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sharon Blum
- The Goldschleger Eye Institute, Sheba Medical Center, Tel Hashomer, Tel-Aviv University, Tel-Aviv, Israel
| | - Sadik T Sherief
- Department of Ophthalmology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | - Sandra E Staffieri
- Department of Ophthalmology, Royal Children's Hospital, Parkville, VIC, Australia
| | | | | | - Xunda Ji
- Department of Ophthalmology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Nicholas J Astbury
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK
| | - Covadonga Bascaran
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK
| | - Matthew Burton
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK
| | - Marcia Zondervan
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK
| | - Richard Bowman
- International Centre for Eye Helath, London School of Hygiene & Tropical Medicine, London, UK.,Ophthalmology Department, Great Ormond Street Children's Hospital, London, UK
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Tsutsumi M, Hattori H, Akita N, Maeda N, Kubota T, Horibe K, Fujita N, Kawai M, Shinkai Y, Kato M, Kato T, Kawamura R, Suzuki F, Kurahashi H. A female patient with retinoblastoma and severe intellectual disability carrying an X;13 balanced translocation without rearrangement in the RB1 gene: a case report. BMC Med Genomics 2019; 12:182. [PMID: 31806026 PMCID: PMC6896736 DOI: 10.1186/s12920-019-0640-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 11/29/2019] [Indexed: 12/02/2022] Open
Abstract
Background Female carriers of a balanced X; autosome translocation generally undergo selective inactivation of the normal X chromosome. This is because inactivation of critical genes within the autosomal region of the derivative translocation chromosome would compromise cellular function. We here report a female patient with bilateral retinoblastoma and a severe intellectual disability who carries a reciprocal X-autosomal translocation. Case presentation Cytogenetic and molecular analyses, a HUMARA (Human androgen receptor) assay, and methylation specific PCR (MSP) and bisulfite sequencing were performed using peripheral blood samples from the patient. The patient’s karyotype was 46,X,t(X;13)(q28;q14.1) by G-banding analysis. Further cytogenetic analysis located the entire RB1 gene and its regulatory region on der(X) with no translocation disruption. The X-inactivation pattern in the peripheral blood was highly skewed but not completely selected. MSP and deep sequencing of bisulfite-treated DNA revealed that an extensive 13q region, including the RB1 promoter, was unusually methylated in a subset of cells. Conclusions The der(X) region harboring the RB1 gene was inactivated in a subset of somatic cells, including the retinal cells, in the patient subject which acted as the first hit in the development of her retinoblastoma. In addition, the patient’s intellectual disability may be attributable to the inactivation of the der(X), leading to a 13q deletion syndrome-like phenotype, or to an active X-linked gene on der (13) leading to Xq28 functional disomy.
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Affiliation(s)
- Makiko Tsutsumi
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Hiroyoshi Hattori
- Department of Clinical Genetics, National Hospital Organization, Nagoya Medical Center, Nagoya, Japan.,Department of Pediatrics, National Hospital Organization, Nagoya Medical Center, Nagoya, Japan
| | - Nobuhiro Akita
- Department of Pediatrics, National Hospital Organization, Nagoya Medical Center, Nagoya, Japan
| | - Naoko Maeda
- Department of Pediatrics, National Hospital Organization, Nagoya Medical Center, Nagoya, Japan
| | - Toshinobu Kubota
- Department of Ophthalmology, National Hospital Organization, Nagoya Medical Center, Nagoya, Japan
| | - Keizo Horibe
- Department of Pediatrics, National Hospital Organization, Nagoya Medical Center, Nagoya, Japan
| | - Naoko Fujita
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.,Genome and Transcriptome Analysis Center, Fujita Health University, Toyoake, Japan
| | - Miki Kawai
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yasuko Shinkai
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Maki Kato
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Takema Kato
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Rie Kawamura
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Fumihiko Suzuki
- Center for Collaboration in Research and Education, Fujita Health University, Toyoake, Japan
| | - Hiroki Kurahashi
- Division of Molecular Genetics, Institute for Comprehensive Medical Science, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
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Tommerup N. Mendelian cytogenetics. Chromosome rearrangements associated with mendelian disorders. J Med Genet 1993; 30:713-27. [PMID: 8411066 PMCID: PMC1016528 DOI: 10.1136/jmg.30.9.713] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- N Tommerup
- Danish Centre for Human Genome Research, John F Kennedy Institute, Glostrup, Denmark
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