1
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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.
| |
Collapse
|