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Colombo EA, Locatelli A, Cubells Sánchez L, Romeo S, Elcioglu NH, Maystadt I, Esteve Martínez A, Sironi A, Fontana L, Finelli P, Gervasini C, Pecile V, Larizza L. Rothmund-Thomson Syndrome: Insights from New Patients on the Genetic Variability Underpinning Clinical Presentation and Cancer Outcome. Int J Mol Sci 2018; 19:E1103. [PMID: 29642415 PMCID: PMC5979380 DOI: 10.3390/ijms19041103] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/31/2018] [Accepted: 04/03/2018] [Indexed: 11/16/2022] Open
Abstract
Biallelic mutations in RECQL4 gene, a caretaker of the genome, cause Rothmund-Thomson type-II syndrome (RTS-II) and confer increased cancer risk if they damage the helicase domain. We describe five families exemplifying clinical and allelic heterogeneity of RTS-II, and report the effect of pathogenic RECQL4 variants by in silico predictions and transcripts analyses. Complete phenotype of patients #39 and #42 whose affected siblings developed osteosarcoma correlates with their c.[1048_1049del], c.[1878+32_1878+55del] and c.[1568G>C;1573delT], c.[3021_3022del] variants which damage the helicase domain. Literature survey highlights enrichment of these variants affecting the helicase domain in patients with cancer outcome raising the issue of strict oncological surveillance. Conversely, patients #29 and #19 have a mild phenotype and carry, respectively, the unreported homozygous c.3265G>T and c.3054A>G variants, both sparing the helicase domain. Finally, despite matching several criteria for RTS clinical diagnosis, patient #38 is heterozygous for c.2412_2414del; no pathogenic CNVs out of those evidenced by high-resolution CGH-array, emerged as contributors to her phenotype.
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Affiliation(s)
- Elisa A Colombo
- Dipartimento di Scienze della Salute, Università degli Studi di Milano, 20142 Milan, Italy.
| | - Andrea Locatelli
- UO Dermatologia e Venereologia, Asst Papa Giovanni XXIII, 24127 Bergamo, Italy.
| | - Laura Cubells Sánchez
- Department of Dermatology, Consorcio Hospital General Universitario de Valencia, 46014 Valencia, Spain.
| | - Sara Romeo
- Institute of Clinical Sciences, Imperial College London, London W12 0NN, UK.
- MRC London Institute of Medical Sciences, Imperial College London, W12 0NN London, UK.
| | - Nursel H Elcioglu
- Department of Pediatric Genetics, Marmara University Medical School, 34890 Istanbul, Turkey.
- Department of Pediatrics, Eastern Mediterranean University, Mersin 10 Cyprus, Turkey.
| | - Isabelle Maystadt
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, 6041 Charleroi (Gosselies), Belgium.
| | - Altea Esteve Martínez
- Department of Dermatology, Consorcio Hospital General Universitario de Valencia, 46014 Valencia, Spain.
| | - Alessandra Sironi
- Laboratory of Medical Cytogenetics and Molecular Genetics, IRCCS Istituto Auxologico Italiano, 20149 Milan, Italy.
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20133 Milan, Italy.
| | - Laura Fontana
- Dipartimento di Scienze della Salute, Università degli Studi di Milano, 20142 Milan, Italy.
| | - Palma Finelli
- Laboratory of Medical Cytogenetics and Molecular Genetics, IRCCS Istituto Auxologico Italiano, 20149 Milan, Italy.
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20133 Milan, Italy.
| | - Cristina Gervasini
- Dipartimento di Scienze della Salute, Università degli Studi di Milano, 20142 Milan, Italy.
| | - Vanna Pecile
- Institute for Maternal and Child Health, Foundation IRCCS Burlo Garofolo Institute, 34137 Trieste, Italy.
| | - Lidia Larizza
- Laboratory of Medical Cytogenetics and Molecular Genetics, IRCCS Istituto Auxologico Italiano, 20149 Milan, Italy.
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Gui B, Song Y, Hu X, Li H, Qin Z, Su J, Li C, Fan X, Li M, Luo J, Feng Y, Song L, Chen S, Gong C, Shen Y. Novel pathogenic RECQL4 variants in Chinese patients with Rothmund-Thomson syndrome. Gene 2018; 654:110-115. [PMID: 29462647 DOI: 10.1016/j.gene.2018.02.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 02/06/2018] [Accepted: 02/16/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND Rothmund-Thomson syndrome (RTS) is a rare autosomal recessive disorder mainly characterized by cutaneous poikiloderma, sparse hair, short stature and skeletal defects. Deleterious mutations in the RecQ-like DNA helicase type 4 (RECQL4) gene have been detected in approximately two-thirds of RTS cases. METHODS Three Chinese patients from two unrelated families were enrolled for clinical evaluation. Targeted next-generation sequencing (NGS) using a custom panel consisting of 705 short-stature-related genes was performed for the probands. Variants detected by NGS were confirmed by Sanger sequencing and examined in family members. RESULTS The probands presented with characteristic features of severe growth delay, poikiloderma mostly on the face, buttocks and extremities, sparse or absent hair, eyelashes, and eyebrows, forearm reduction defects, small hands with hypoplasia of the middle phalanx (little finger) in one of the probands, epicanthus, hypertelorism, and dental abnormalities. In addition, novel auricle features and other rare facial features, including narrow palpebral fissure, depressed nasal bridge, and small chin were exhibited. Four novel RECQL4 variants were identified, including three pathogenic frameshift variants, c.1724_1725delAC, p.His575fs*7; c.2421dupT, p.Asp808*; c.1770_1807del, p.Pro591fs*2, and one likely pathogenic missense variant, c.691G>A, p.Gly231Ser. CONCLUSION Our study expands the mutational spectrum of RECQL4 gene and reveals novel phenotypes observed in Chinese RTS patients.
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Affiliation(s)
- Baoheng Gui
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Yanning Song
- National Center for Children's Health, China, Center of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, The Capital Medical University, Beijing 100045, PR China
| | - Xuyun Hu
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, PR China
| | - Hongdou Li
- Institute of Reproduction & Development, Hospital and Institute of Obstetrics & Gynecology, Fudan University, Shanghai 200011, PR China
| | - Zailong Qin
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Jiasun Su
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Chuan Li
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Xin Fan
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Mengting Li
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Jingsi Luo
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Ying Feng
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Liping Song
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China
| | - Shaoke Chen
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China.
| | - Chunxiu Gong
- National Center for Children's Health, China, Center of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, The Capital Medical University, Beijing 100045, PR China.
| | - Yiping Shen
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 530002, PR China; Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, PR China; Division of Genetics and Genomics, Boston Children's Hospital, Department of Neurology, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, United States.
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