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Dangoni GD, Teixeira ACB, da Costa SS, Scliar MO, Carvalho LML, Silva LN, Novak EM, Vince CSC, Maschietto MC, Sugayama SMM, Odone-Filho V, Krepischi ACV. Germline mutations in cancer predisposition genes among pediatric patients with cancer and congenital anomalies. Pediatr Res 2024; 95:1346-1355. [PMID: 38182823 DOI: 10.1038/s41390-023-03000-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/08/2023] [Accepted: 12/20/2023] [Indexed: 01/07/2024]
Abstract
BACKGROUND Childhood cancer has a poorly known etiology, and investigating the underlying genetic background may provide novel insights. A recognized association exists between non-chromosomal birth defects and childhood cancer susceptibility. METHODS We performed whole-exome sequencing and chromosomal microarray analysis in a cohort of childhood cancer (22 individuals, 50% with congenital anomalies) to unravel deleterious germline variants. RESULTS A diagnostic yield of 14% was found, encompassing heterozygous variants in bona fide dominant Cancer Predisposition Genes (CPGs). Considering candidate and recessive CPGs harboring monoallelic variants, which were also deemed to play a role in the phenotype, the yield escalated to 45%. Most of the deleterious variants were mapped in genes not conventionally linked to the patient's tumor type. Relevant findings were detected in 55% of the syndromic individuals, mostly variants potentially underlying both phenotypes. CONCLUSION We uncovered a remarkable prevalence of germline deleterious CPG variants, highlighting the significance of a comprehensive genetic analysis in pediatric cancer, especially when coupled with additional clinical signs. Moreover, our findings emphasized the potential for oligogenic inheritance, wherein multiple genes synergistically increase cancer risk. Lastly, our investigation unveiled potentially novel genotype-phenotype associations, such as SETD5 in neuroblastoma, KAT6A in gliomas, JAG1 in hepatoblastomas, and TNFRSF13B in Langerhans cell histiocytosis. IMPACT Novel gene-phenotype associations and candidate genes for pediatric cancer were unraveled, such as KAT6A in gliomas, SETD5 in neuroblastoma, JAG1 in hepatoblastomas, and TNFRSF13B in Langerhans cell histiocytosis. Our analysis revealed a high frequency of deleterious germline variants, particularly in cases accompanied by additional clinical signs, highlighting the importance of a comprehensive genetic evaluation in childhood cancer. Our findings also underscored the potential for oligogenic inheritance in pediatric cancer risk. Understanding the cancer etiology is crucial for genetic counseling, often influencing therapeutic decisions and offering valuable insights into molecular targets for the development of oncological therapies.
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Affiliation(s)
- Gustavo D Dangoni
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Anne Caroline B Teixeira
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Silvia S da Costa
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Marília O Scliar
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Laura M L Carvalho
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Luciana N Silva
- Department of Pediatrics, Instituto de Tratamento do Câncer Infantil (ITACI), Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Estela M Novak
- Department of Pediatrics, Instituto de Tratamento do Câncer Infantil (ITACI), Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | | | | | - Sofia M M Sugayama
- Department of Pediatrics, Instituto de Tratamento do Câncer Infantil (ITACI), Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Vicente Odone-Filho
- Department of Pediatrics, Instituto de Tratamento do Câncer Infantil (ITACI), Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Ana Cristina V Krepischi
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil.
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Lorenzo C, Travessa AM, Ferreira AC, Modamio-Høybjør S, Heath KE, Pereira C. Precocious puberty and anal stenosis in an African patient with Rothmund-Thomson syndrome. Am J Med Genet A 2023; 191:280-283. [PMID: 36164748 DOI: 10.1002/ajmg.a.62980] [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: 06/01/2022] [Revised: 08/14/2022] [Accepted: 09/12/2022] [Indexed: 12/14/2022]
Abstract
Rothmund-Thomson syndrome (RTS) is a rare autosomal recessive disorder characterized by a rash that progresses to poikiloderma. Other common features include sparse hair, eyelashes and eyebrows, short stature, variable skeletal abnormalities, dental defects, cataracts, hypogonadism, and an increased risk for cancer, especially osteosarcoma and skin cancer. RTS is caused by biallelic pathogenic variants in ANAPC1 (Type 1 RTS) or RECQL4 (Type 2 RTS). We present an African girl with Type 2 RTS caused by a nonsense variant and an intronic variant in RECQL4. The patient presented precocious puberty, which has not been previously reported in RTS and that was treated with a GnRH analog, and anal stenosis, which has only been reported once. This case highlights the need to consider deep intronic variants in patients with RTS when pathogenic variants in the coding regions and exon/intron boundaries are not identified and expands the phenotypic spectrum of this disorder.
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Affiliation(s)
- Cristina Lorenzo
- Department of Pediatrics, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, EPE, Lisbon, Portugal
| | - André M Travessa
- Medical Genetics Department and ERN-BOND, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, EPE, Lisbon, Portugal.,Faculty of Medicine, Institute of Histology and Developmental Biology, University of Lisbon, Lisbon, Portugal
| | - Ana Cristóvão Ferreira
- Department of Pediatrics, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, EPE, Lisbon, Portugal
| | - Silvia Modamio-Høybjør
- Skeletal Dysplasia Multidisciplinary Unit (UMDE) and ERN-BOND, La Paz University Hospital, Madrid, Spain.,Institute of Medical and Molecular Genetics (INGEMM), La Paz University Hospital, IdiPAZ, Universidad Autónoma de Madrid, Madrid, Spain.,CIBERER (Centro de Investigación Biomédica en Red de Enfermedades Raras), ISCIII, Madrid, Spain
| | - Karen E Heath
- Skeletal Dysplasia Multidisciplinary Unit (UMDE) and ERN-BOND, La Paz University Hospital, Madrid, Spain.,Institute of Medical and Molecular Genetics (INGEMM), La Paz University Hospital, IdiPAZ, Universidad Autónoma de Madrid, Madrid, Spain.,CIBERER (Centro de Investigación Biomédica en Red de Enfermedades Raras), ISCIII, Madrid, Spain
| | - Carla Pereira
- Pediatric Endocrinology Unit, Department of Pediatrics, Hospital de Santa Maria - Centro Hospitalar Universitário Lisboa Norte, EPE, Lisbon, Portugal
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Marchena-Perea EM, Salazar-Hidalgo ME, Gómez-Sanz A, Arranz-Ledo M, Barroso A, Fernández V, Tejera-Pérez H, Pita G, Núñez-Torres R, Pombo L, Morales-Chamorro R, Cano-Cano JM, Soriano MDC, Garre P, Durán M, Currás-Freixes M, de la Hoya M, Osorio A. A Large Case-Control Study Performed in Spanish Population Suggests That RECQL5 Is the Only RECQ Helicase Involved in Breast Cancer Susceptibility. Cancers (Basel) 2022; 14:cancers14194738. [PMID: 36230663 PMCID: PMC9563930 DOI: 10.3390/cancers14194738] [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: 08/24/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary Around 50% of the familial breast cancer (BC) cases are estimated to be caused by variants in low-, moderate-, and high-risk susceptibility genes; however, the other half is of unknown origin. The finding of new susceptibility genes is key to improve diagnosis, take preventive measures, and identify new therapies. In this context, previous studies have discussed whether the genes encoding for the RECQ helicase family could play a role in BC susceptibility, without very conclusive results. To clarify this, in this study, we sequenced the whole coding sequence of the RECQL1, BLM, WRN, RECQL4, and RECQL5 genes in 1993 Spanish BC familial cases and compared it with controls from gnomAD. No association was found for RECQL1, BLM, WRN, and RECQL4; however, we did find an association between RECQL5 and breast cancer as a moderate-risk gene, making it a perfect candidate for further studies. Abstract Around 50% of the familial breast cancer (BC) cases are estimated to be caused by germline variants in known low-, moderate-, and high-risk susceptibility genes, while the other half is of unknown genetic origin. In the present study, we wanted to evaluate the role of the RECQ helicases, some of which have been studied in the past as candidates, with unclear results about their role in the disease. Using next-generation sequencing (NGS) technology, we analyzed the whole coding sequence of BLM, RECQL1, RECQL4, RECQL5, and WRN in almost 2000 index cases from BC Spanish families that had previously tested negative for the known BC susceptibility genes (BRCAX) and compared the results with the controls extracted from gnomAD. Our results suggest that BLM, RECQL1, RECQL4, and WRN do not play a major role in BC susceptibility. However, in the combined analysis, joining the present results with those previously reported in a series of 1334 BC Spanish patients and controls, we found a statistically significant association between Loss of Function (LoF) variants in RECQL5 and BC risk, with an OR of 2.56 (p = 0.009; 95% CI, 1.18–4.98). Our findings support our previous work and places the RECQL5 gene as a new moderate-risk BC gene.
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Affiliation(s)
- Erik Michel Marchena-Perea
- Human Cancer Genetics Programme, Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Milton Eduardo Salazar-Hidalgo
- Human Cancer Genetics Programme, Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Alicia Gómez-Sanz
- Molecular Oncology Laboratory (CIBERONC), Hospital Clínico San Carlos, IdISSC, 28040 Madrid, Spain
| | - Mónica Arranz-Ledo
- Cancer Genetics Group, Unidad de Excelencia Instituto de Biología y Genética Molecular, Universidad de Valladolid-Consejo Superior de Investigaciones Científicas (IBGM, UVa-CSIC), 47003 Valladolid, Spain
| | - Alicia Barroso
- Human Cancer Genetics Programme, Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Victoria Fernández
- Human Cancer Genetics Programme, Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Hugo Tejera-Pérez
- Human Cancer Genetics Programme, Human Genotyping Unit (CEGEN), Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Guillermo Pita
- Human Cancer Genetics Programme, Human Genotyping Unit (CEGEN), Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Rocío Núñez-Torres
- Human Cancer Genetics Programme, Human Genotyping Unit (CEGEN), Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Luz Pombo
- Medical Oncology Section, Universitary Hospital Complex of Albacete, 02006 Albacete, Spain
| | - Rafael Morales-Chamorro
- Medical Oncology Section, Hospitalary Compex La Mancha Centro, 13600 Alcázar de San Juan, Spain
| | - Juana María Cano-Cano
- Medical Oncology Service, Universitary General Hospital of Ciudad Real, 13005 Ciudad Real, Spain
| | | | - Pilar Garre
- Molecular Oncology Laboratory (CIBERONC), Hospital Clínico San Carlos, IdISSC, 28040 Madrid, Spain
| | - Mercedes Durán
- Cancer Genetics Group, Unidad de Excelencia Instituto de Biología y Genética Molecular, Universidad de Valladolid-Consejo Superior de Investigaciones Científicas (IBGM, UVa-CSIC), 47003 Valladolid, Spain
| | - María Currás-Freixes
- Human Cancer Genetics Programme, Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - Miguel de la Hoya
- Molecular Oncology Laboratory (CIBERONC), Hospital Clínico San Carlos, IdISSC, 28040 Madrid, Spain
| | - Ana Osorio
- Human Cancer Genetics Programme, Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), 28029 Madrid, Spain
- Genetics Service, Fundación Jiménez Díaz, 28043 Madrid, Spain
- Correspondence: ; Tel.: +34-917-328-002
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Rothmund-Thomson Syndrome-Like RECQL4 Truncating Mutations Cause a Haploinsufficient Low-Bone-Mass Phenotype in Mice. Mol Cell Biol 2021; 41:e0059020. [PMID: 33361189 PMCID: PMC8088275 DOI: 10.1128/mcb.00590-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Rothmund-Thomson syndrome (RTS) is an autosomal recessive disorder characterized by defects in the skeletal system, such as bone hypoplasia, short stature, low bone mass, and an increased incidence of osteosarcoma. RTS type 2 patients have germ line compound biallelic protein-truncating mutations of RECQL4. As existing murine models employ Recql4 null alleles, we have attempted to more accurately model RTS by generating mice with patient-mimicking truncating Recql4 mutations. Truncating mutations impaired the stability and subcellular localization of RECQL4 and resulted in homozygous embryonic lethality and a haploinsufficient low-bone mass phenotype. Combination of a truncating mutation with a conditional Recql4 null allele demonstrated that the skeletal defects were intrinsic to the osteoblast lineage. However, the truncating mutations did not promote tumorigenesis. We utilized murine Recql4 null cells to assess the impact of human RECQL4 mutations using an in vitro complementation assay. While some mutations created unstable protein products, others altered subcellular localization of the protein. Interestingly, the severity of the phenotypes correlated with the extent of protein truncation. Collectively, our results reveal that truncating RECQL4 mutations in mice lead to an osteoporosis-like phenotype through defects in early osteoblast progenitors and identify RECQL4 gene dosage as a novel regulator of bone mass.
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Schmit M, Bielinsky AK. Congenital Diseases of DNA Replication: Clinical Phenotypes and Molecular Mechanisms. Int J Mol Sci 2021; 22:E911. [PMID: 33477564 PMCID: PMC7831139 DOI: 10.3390/ijms22020911] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 12/19/2022] Open
Abstract
Deoxyribonucleic acid (DNA) replication can be divided into three major steps: initiation, elongation and termination. Each time a human cell divides, these steps must be reiteratively carried out. Disruption of DNA replication can lead to genomic instability, with the accumulation of point mutations or larger chromosomal anomalies such as rearrangements. While cancer is the most common class of disease associated with genomic instability, several congenital diseases with dysfunctional DNA replication give rise to similar DNA alterations. In this review, we discuss all congenital diseases that arise from pathogenic variants in essential replication genes across the spectrum of aberrant replisome assembly, origin activation and DNA synthesis. For each of these conditions, we describe their clinical phenotypes as well as molecular studies aimed at determining the functional mechanisms of disease, including the assessment of genomic stability. By comparing and contrasting these diseases, we hope to illuminate how the disruption of DNA replication at distinct steps affects human health in a surprisingly cell-type-specific manner.
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Affiliation(s)
| | - Anja-Katrin Bielinsky
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA;
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Somatic and germline analysis of a familial Rothmund-Thomson syndrome in two siblings with osteosarcoma. NPJ Genom Med 2020; 5:51. [PMID: 33294214 PMCID: PMC7718910 DOI: 10.1038/s41525-020-00160-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 10/29/2020] [Indexed: 11/10/2022] Open
Abstract
Rothmund–Thomson syndrome (RTS) is characterized by a rash that begins in the first few months of life and eventually develops into poikiloderma. Associated symptoms are alterations in the teeth, sparse hair, thin eyebrows, lack of eyelashes, low stature, bone abnormalities, hematological illnesses, gastrointestinal disease, malnutrition, cataracts, and predisposition to cancer, principally to bone tumors and skin cancer. Diagnostic certitude is provided by a genetic study involving detection of pathogenic variants of the RECQL4 gene. We hereby present a familiar case of RTS in two siblings from a Portuguese family, both diagnosed with osteosarcoma. Genomic analysis (203 genes) of both tumors as well as germline analysis of the RECQL4 gene, thus confirming the syndrome in the family, have been performed. The relevance of clinical recognition of the hallmarks of the disease and thus early diagnosis with early intervention is highlighted.
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7
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Maciaszek JL, Oak N, Chen W, Hamilton KV, McGee RB, Nuccio R, Mostafavi R, Hines-Dowell S, Harrison L, Taylor L, Gerhardt EL, Ouma A, Edmonson MN, Patel A, Nakitandwe J, Pappo AS, Azzato EM, Shurtleff SA, Ellison DW, Downing JR, Hudson MM, Robison LL, Santana V, Newman S, Zhang J, Wang Z, Wu G, Nichols KE, Kesserwan CA. Enrichment of heterozygous germline RECQL4 loss-of-function variants in pediatric osteosarcoma. Cold Spring Harb Mol Case Stud 2019; 5:mcs.a004218. [PMID: 31604778 PMCID: PMC6824257 DOI: 10.1101/mcs.a004218] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 08/28/2019] [Indexed: 02/07/2023] Open
Abstract
Patients harboring germline pathogenic biallelic variants in genes involved in the recognition and repair of DNA damage are known to have a substantially increased cancer risk. Emerging evidence suggests that individuals harboring heterozygous variants in these same genes may also be at heightened, albeit lesser, risk for cancer. Herein, we sought to determine whether heterozygous variants in RECQL4, the gene encoding an essential DNA helicase that is defective in children with the autosomal recessive cancer-predisposing condition Rothmund-Thomson syndrome (RTS), are associated with increased risk for childhood cancer. To address this question, we interrogated germline sequence data from 4435 pediatric cancer patients at St. Jude Children's Research Hospital and 1127 from the National Cancer Institute Therapeutically Applicable Research to Generate Effective Treatment (TARGET) database and identified 24 (0.43%) who harbored loss-of-function (LOF) RECQL4 variants, including five of 249 (2.0%) with osteosarcoma (OS). These RECQL4 variants were significantly overrepresented in children with OS, the cancer most frequently observed in patients with RTS, as compared to 134,187 noncancer controls in the Genome Aggregation Database (gnomAD v2.1; P = 0.00087, odds ratio [OR] = 7.1, 95% CI, 2.9-17). Nine of the 24 (38%) individuals possessed the same c.1573delT (p.Cys525Alafs) variant located in the highly conserved DNA helicase domain, suggesting that disruption of this domain is central to oncogenesis. Altogether these data expand our understanding of the genetic factors predisposing to childhood cancer and reveal a novel association between heterozygous RECQL4 LOF variants and development of pediatric OS.
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Affiliation(s)
- Jamie L Maciaszek
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Ninad Oak
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Wenan Chen
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Kayla V Hamilton
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Rose B McGee
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Regina Nuccio
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Roya Mostafavi
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Stacy Hines-Dowell
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Lynn Harrison
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Leslie Taylor
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Elsie L Gerhardt
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Annastasia Ouma
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Michael N Edmonson
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Aman Patel
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Joy Nakitandwe
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Alberto S Pappo
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Elizabeth M Azzato
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Sheila A Shurtleff
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - David W Ellison
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - James R Downing
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Melissa M Hudson
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Leslie L Robison
- Department of Epidemiology and Cancer Control, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Victor Santana
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Scott Newman
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Jinghui Zhang
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Zhaoming Wang
- Department of Epidemiology and Cancer Control, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Gang Wu
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Kim E Nichols
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Chimene A Kesserwan
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
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Yadav S, Thakur S, Kohlhase J, Bhari N, Kabra M, Gupta N. Report of Two Novel Mutations in Indian Patients with Rothmund-Thomson Syndrome. J Pediatr Genet 2019; 8:163-167. [PMID: 31406625 DOI: 10.1055/s-0039-1684017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 02/23/2019] [Indexed: 02/01/2023]
Abstract
Rothmund-Thomson syndrome (RTS) is a rare autosomal recessive disorder caused by mutations in RECQL4 and has characteristic clinical features. We report two unrelated phenotypically diverse patients (cases 1 and 2) with RTS having novel variants in RECQL4 gene . Case-1 was evaluated for poor growth and recurrent fractures and skin lesions. Case-2 presented at 4 months with failure to thrive and radial ray defect and developed poikilodermatous skin lesions after infancy. Both cases were confirmed to have homozygous pathogenic variants in RECQL4 . Both patients have normal intellect and are on supportive therapy. The presence of characteristic poikiloderma lesions with specific distribution and skeletal anomalies in a patient with proportionate short stature is a clue toward the diagnosis of RTS.
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Affiliation(s)
- Sakshi Yadav
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Thakur
- Division of Genetic and Fetal Medicine, Fortis Hospital, Delhi and Apollo Hospital, New Delhi, India
| | | | - Neetu Bhari
- Department of Skin, All India Institute of Medical Sciences, New Delhi, India
| | - Madhulika Kabra
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Neerja Gupta
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
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