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Bottillo I, Laino L, Azzarà A, Lintas C, Cassano I, Di Lazzaro V, Ursini F, Motolese F, Bargiacchi S, Formicola D, Grammatico P, Gurrieri F. A pathogenic variant in the FLCN gene presenting with pure dementia: is autophagy at the intersection between neurodegeneration and cancer? Front Neurosci 2024; 17:1304080. [PMID: 38249578 PMCID: PMC10796570 DOI: 10.3389/fnins.2023.1304080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/08/2023] [Indexed: 01/23/2024] Open
Abstract
Introduction Folliculin, encoded by FLCN gene, plays a role in the mTORC1 autophagy cascade and its alterations are responsible for the Birt-Hogg-Dubé (BHD) syndrome, characterized by follicle hamartomas, kidney tumors and pneumothorax. Patient and results We report a 74-years-old woman diagnosed with dementia and carrying a FLCN alteration in absence of any sign of BHD. She also carried an alteration of MAT1A gene, which is also implicated in the regulation of mTORC1. Discussion The MAT1A variant could have prevented the development of a FLCN-related oncological phenotype. Conversely, our patient presented with dementia that, to date, has yet to be documented in BHD. Folliculin belongs to the DENN family proteins, which includes C9orf72 whose alteration has been associated to neurodegeneration. The folliculin perturbation could affect the C9orf72 activity and our patient could represent the first human model of a relationship between FLCN and C9orf72 across the path of autophagy.
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Affiliation(s)
- Irene Bottillo
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Luigi Laino
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Alessia Azzarà
- Research Unit of Medical Genetics, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Carla Lintas
- Research Unit of Medical Genetics, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Ilaria Cassano
- Research Unit of Medical Genetics, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Vincenzo Di Lazzaro
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Unit of Neurology, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Francesca Ursini
- Unit of Neurology, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Francesco Motolese
- Department of Medicine and Surgery, Unit of Neurology, Neurophysiology, Neurobiology and Psychiatry, Università Campus Bio-Medico di Roma, Rome, Italy
- Unit of Neurology, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Simone Bargiacchi
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Daniela Formicola
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Paola Grammatico
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Fiorella Gurrieri
- Research Unit of Medical Genetics, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- Operative Research Unit of Medical Genetics, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
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Di Giosaffatte N, Grammatico P, Bottillo I. Reply to Fry, L.E.; MacLaren, R.E. Comment on "Di Giosaffatte et al. A Novel Hypothesis on Choroideremia-Manifesting Female Carriers: Could CHM In-Frame Variants Exert a Dominant Negative Effect? A Case Report. Genes 2022, 13, 1268". Genes (Basel) 2023; 14:2161. [PMID: 38136983 PMCID: PMC10742798 DOI: 10.3390/genes14122161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
We express our gratitude to Dr. Fry and Prof. McLaren [...].
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Affiliation(s)
| | | | - Irene Bottillo
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Circ. Gianicolense, 87, 00152 Rome, Italy; (N.D.G.); (P.G.)
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Bottillo I, Savino E, Majore S, Mulargia C, Valiante M, Ferraris A, Rossi V, Svegliati F, Ciccone MP, Brusco F, Grammatico B, Di Giacomo G, Bargiacchi S, D'Angelantonio D, Grammatico P. Two unrelated cases with biallelic CHEK2 variants:a novel condition with constitutional chromosomal instability? Eur J Hum Genet 2023; 31:474-478. [PMID: 36529819 PMCID: PMC10133322 DOI: 10.1038/s41431-022-01270-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 12/03/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022] Open
Abstract
Constitutional heterozygous mutations in CHEK2 gene have been associated with hereditary cancer risk. To date, only a few homozygous CHEK2 mutations have been reported in families with cancer susceptibility. Here, we report two unrelated individuals with a personal and familial cancer history in whom biallelic CHEK2 alterations were identified. The first case resulted homozygous for the CHEK2 c.793-1 G > A (p.Asp265Thrfs*10) variant, and the second one was found to be compound heterozygous for the c.1100delC (p.Thr367Metfs*15) and the c.1312 G > T (p.Asp438Tyr) variants. Multiple cytogenetic anomalies were demonstrated on peripheral lymphocytes of both patients. A literature revision showed that a single other CHEK2 homozygous variant was previously associated to a constitutional randomly occurring multi-translocation karyotype from peripheral blood in humans. We hypothesize that, at least some biallelic CHEK2 mutations might be associated with a novel disorder, further expanding the group of chromosome instability syndromes. Additional studies on larger cohorts are needed to confirm if chromosomal instability could represent a marker for CHEK2 constitutionally mutated recessive genotypes, and to investigate the cancer risk and the occurrence of other anomalies typically observed in chromosome instability syndromes.
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Affiliation(s)
- Irene Bottillo
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy.
| | - Emanuele Savino
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Silvia Majore
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Claudia Mulargia
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Michele Valiante
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Alessandro Ferraris
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Valentina Rossi
- Breast Oncology Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | | | - Maria Pia Ciccone
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Francesca Brusco
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Barbara Grammatico
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Gianluca Di Giacomo
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Simone Bargiacchi
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Daniela D'Angelantonio
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Paola Grammatico
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
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Azzarà A, Rumore R, Brugnoletti F, Tabolacci E, Bottillo I, Sangiorgi E, Gurrieri F. RADX Gene Variant May Predispose to Familial Asperger Syndrome. Genes (Basel) 2023; 14:genes14020301. [PMID: 36833228 PMCID: PMC9957148 DOI: 10.3390/genes14020301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/04/2023] [Accepted: 01/18/2023] [Indexed: 01/25/2023] Open
Abstract
Asperger syndrome (AS) is a pervasive developmental disorder characterized by general impairment in socialization, stereotypical behavior, defective adaptation to the social context usually without intellectual disability, and some high functioning areas related to memory and mathematics. Clinical criteria are not well defined and the etiology is heterogeneous and mostly unknown. Like in typical autism spectrum disorders (ASD), the genetic background plays a crucial role in AS, and often an almost mendelian segregation can be observed in some families. We performed a whole exome sequencing (WES) in three relatives of a family with vertical transmission of AS-ASD to identify variants in candidate genes segregating with the phenotype. Variant p.(Cys834Ser) in the RADX gene was the only one segregating among all the affected family members. This gene encodes a single-strand DNA binding factor, which mediates the recruitment of genome maintenance proteins to sites of replication stress. Replication stress and genome instability have been reported recently in neural progenitor cells derived from ASD patients, leading to a disruption of long neural genes involved in cell-cell adhesion and migration. We propose RADX as a new gene that when mutated could represent a predisposing factor to AS-ASD.
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Affiliation(s)
- Alessia Azzarà
- Research Unit of Medical Genetics, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
| | - Roberto Rumore
- Istituto di Medicina Genomica, Fondazione Policlinico Universitario A. Gemelli IRCCS—Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Fulvia Brugnoletti
- Oncogenetics Unit, Service of Oncology, University Hospital of Geneva, 1205 Geneva, Switzerland
| | - Elisabetta Tabolacci
- Istituto di Medicina Genomica, Fondazione Policlinico Universitario A. Gemelli IRCCS—Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Irene Bottillo
- Division of Medical Genetics, Department of Experimental Medicine, San Camillo-Forlanini Hospital, Sapienza University, 00152 Rome, Italy
| | - Eugenio Sangiorgi
- Istituto di Medicina Genomica, Fondazione Policlinico Universitario A. Gemelli IRCCS—Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Correspondence: ; Tel.: +39-0630154927
| | - Fiorella Gurrieri
- Research Unit of Medical Genetics, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, 00128 Rome, Italy
- Operative Research Unit of Medical Genetics, Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy
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5
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Shi X, Wang H, Zhang R, Liu Z, Guo W, Wang S, Liu X, Lang Y, Bottillo I, Dong B, Shao L. Minigene splicing assays reveal new insights into exonic variants of the SLC12A3 gene in Gitelman syndrome. Mol Genet Genomic Med 2023; 11:e2128. [PMID: 36597580 PMCID: PMC10094094 DOI: 10.1002/mgg3.2128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 09/15/2022] [Accepted: 12/15/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Gitelman syndrome (GS) is a type of salt-losing tubular disease, most of which is caused by SLC12A3 gene variants, and missense variants account for the majority. Recently, the phenomenon of exon skipping, in which variants disrupt normal pre-mRNA splicing, has been related to a variety of diseases. Therefore, we hypothesize that a certain proportion of SLC12A3 variants can result in disease via interfering with the normal splicing process. METHODS We analyzed 342 previously presumed SLC12A3 missense variants using bioinformatics programs and identified candidate variants that may alter the splicing of pre-mRNA through minigene assays. RESULTS Our study revealed that, among ten candidate variants, six variants (c.602G>A, c.602G>T, c.1667C>T, c.1925G>A, c.2548G>C, and c.2549G>C) led to complete or incomplete exon skipping by affecting exonic splicing regulatory elements and/or disturbing canonical splice sites. CONCLUSION It is worth mentioning that this is the largest study on pre-mRNA splicing of SLC12A3 exonic variants. In addition, our study emphasizes the importance of detecting splicing function at the mRNA level in GS and indicates that minigene analysis is a valuable tool for splicing functional assays of variants in vitro.
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Affiliation(s)
- Xiaomeng Shi
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Hong Wang
- Department of Nephrology, Qingdao Eighth People's Hospital, Qingdao, China
| | - Ruixiao Zhang
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Zhiying Liu
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Wencong Guo
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Sai Wang
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China.,Department of Dermatology, Peking University First Hospital, Beijing, China
| | - Xuyan Liu
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Yanhua Lang
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Bingzi Dong
- Department of Endocrinology, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Leping Shao
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
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6
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Di Giosaffatte N, Bottillo I, Laino L, Iaquinta G, Ferraris A, Garzia M, Bargiacchi S, Mulargia C, Angelitti MR, Palumbo F, Grammatico B, Bartolelli C, Salerno MG, Rigacci L, Grammatico P. Discordant cfDNA-NIPT result unraveling a trisomy 12 chronic lymphocytic leukemia in a 37 years old pregnant woman. Prenat Diagn 2022; 42:1000-1003. [PMID: 35506546 PMCID: PMC9546086 DOI: 10.1002/pd.6158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 11/07/2022]
Abstract
What's already known about this topic?
Discordant NIPT results can rarely unravel maternal malignancies, especially when multiple chromosomal imbalances are reported. Both solid and hematological neoplasms have been described.
What does this study add?
This is the first case of a discordant NIPT result due to Chronic Lymphocytic Leukemia associated with trisomy of the chromosome 12. Putative maternal malignancy should be considered and investigated through sensitive techniques even in presence of a single chromosomal anomaly. This must be considered especially when the imbalance is known to recur in hematological neoplasms.
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Affiliation(s)
- Niccolò Di Giosaffatte
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Irene Bottillo
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Luigi Laino
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Giovanni Iaquinta
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Alessandro Ferraris
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Mariagrazia Garzia
- Haematology and Stem Cell Transplantation Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | - Simone Bargiacchi
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Claudia Mulargia
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Maria Rosaria Angelitti
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Fabiana Palumbo
- Haematology and Stem Cell Transplantation Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | - Barbara Grammatico
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Cinzia Bartolelli
- Obstetrics and Gynecology Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | | | - Luigi Rigacci
- Haematology and Stem Cell Transplantation Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | - Paola Grammatico
- Department of Molecular Medicine, Laboratory of Medical Genetics, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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Digilio MC, Dentici ML, Loddo S, Laino L, Calcagni G, Genovese S, Capolino R, Bottillo I, Calvieri G, Dallapiccola B, Marino B, Novelli A, Versacci P. Congenital heart defects in the recurrent 2q13 deletion syndrome. Eur J Med Genet 2021; 65:104381. [PMID: 34763108 DOI: 10.1016/j.ejmg.2021.104381] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 06/11/2021] [Accepted: 11/02/2021] [Indexed: 11/25/2022]
Abstract
The recurrent 2q13 deletion syndrome is a rare genetic disorder associated with developmental delay, cardiac and urogenital malformations, and minor facial anomalies. Congenital heart defects (CHDs) are the most frequent malformations associated with del2q13. Experimental studies in zebrafish suggest that two genes mapping within the 2q13 critical region (FBLN7 and TMEM87B) could confer susceptibility to congenital heart defects in affected individuals. We reviewed the cardiac characteristics in four patients with 2q13 deletion admitted to our hospitals, and in published patients. Two of our patients had congenital heart defects, consisting in partial anomalous pulmonary venous connection, ostium secundum atrial septal defect ostium secundum, and small muscular ventricular septal defect in one of them, and aortic valve insufficiency with partial fusion of two commissures (incomplete bicuspid aortic valve) and mitral valve insufficiency due to trivial mitral valve prolapse in the other. The anatomic types of CHD in del2q13 syndrome are highly variable and distributed widely, including laterality defects, complex atrioventricular septal defect, septal anomalies, and cardiomyopathies. Cardiac evaluation should be part of the clinical workup at diagnosis of 2q13 deletion.
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Affiliation(s)
- M C Digilio
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy.
| | - M L Dentici
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - S Loddo
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - L Laino
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - G Calcagni
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - S Genovese
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - R Capolino
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - I Bottillo
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - G Calvieri
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - B Dallapiccola
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - B Marino
- Pediatric Cardiology, Department of Pediatrics, Obstetrics and Ginecology, Sapienza University of Rome, Rome, Italy
| | - A Novelli
- Medical Genetics Unit, Medical Genetics Laboratory, Pediatric Cardiology Department, Scientific Rectorate, Bambino Gesù Children Hospital, IRCCS, Rome, Italy
| | - P Versacci
- Pediatric Cardiology, Department of Pediatrics, Obstetrics and Ginecology, Sapienza University of Rome, Rome, Italy
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De Renzi G, Nicolazzo C, Pisegna S, Belardinilli F, Bottillo I, Grammatico P, Giannini G, Gelibter A, Gazzaniga P. 1252P Liquid biopsy to track KRAS G12C mutation at progressive disease in patients with advanced non-small cell lung cancer (NSCLC). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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9
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Zhang R, Chen Z, Song Q, Wang S, Liu Z, Zhao X, Shi X, Guo W, Lang Y, Bottillo I, Shao L. Identification of seven exonic variants in the SLC4A1, ATP6V1B1, and ATP6V0A4 genes that alter RNA splicing by minigene assay. Hum Mutat 2021; 42:1153-1164. [PMID: 34157794 DOI: 10.1002/humu.24246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 06/02/2021] [Accepted: 06/19/2021] [Indexed: 12/25/2022]
Abstract
Primary distal renal tubular acidosis (dRTA) is a rare tubular disease associated with variants in SLC4A1, ATP6V0A4, ATP6V1B1, FOXⅠ1, or WDR72 genes. Currently, there is growing evidence that all types of exonic variants can alter splicing regulatory elements, affecting the precursor messenger RNA (pre-mRNA) splicing process. This study was to determine the consequences of variants associated with dRTA on pre-mRNA splicing combined with predictive bioinformatics tools and minigene assay. As a result, among the 15 candidate variants, 7 variants distributed in SLC4A1 (c.1765C>T, p.Arg589Cys), ATP6V1B1 (c.368G>T, p.Gly123Val; c.370C>T, p.Arg124Trp; c.484G>T, p.Glu162* and c.1102G>A, p.Glu368Lys) and ATP6V0A4 genes (c.322C>T, p.Gln108* and c.1572G>A, p.Pro524Pro) were identified to result in complete or incomplete exon skipping by either disruption of exonic splicing enhancers (ESEs) and generation of exonic splicing silencers, or interference with the recognition of the classic splicing site, or both. To our knowledge, this is the first study on pre-mRNA splicing of exonic variants in the dRTA-related genes. These results highlight the importance of assessing the effects of exonic variants at the mRNA level and suggest that minigene analysis is an effective tool for evaluating the effects of splicing on variants in vitro.
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Affiliation(s)
- Ruixiao Zhang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Zeqing Chen
- Academy for Engineering and Technology, Fudan University, Shanghai, China
| | - Qijing Song
- Emergency Center, People's Hospital of Jimo District, Qingdao, China
| | - Sai Wang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China.,Department of Dermatology, Peking University First Hospital, Beijing, China
| | - Zhiying Liu
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Xiangzhong Zhao
- Central Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaomeng Shi
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Wencong Guo
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Yanhua Lang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Leping Shao
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
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Nicolazzo C, Barault L, Caponnetto S, De Renzi G, Belardinilli F, Bottillo I, Bargiacchi S, Macagno M, Grammatico P, Giannini G, Cortesi E, Di Nicolantonio F, Gazzaniga P. True conversions from RAS mutant to RAS wild-type in circulating tumor DNA from metastatic colorectal cancer patients as assessed by methylation and mutational signature. Cancer Lett 2021; 507:89-96. [PMID: 33744389 DOI: 10.1016/j.canlet.2021.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/11/2021] [Accepted: 03/12/2021] [Indexed: 01/10/2023]
Abstract
The paucity of targeted treatments available in patients with RAS mutant colorectal cancers contributes to the poor prognosis of this patient group compared to those with RAS wild-type disease. Recent liquid biopsy-driven studies have demonstrated that RAS mutant clones might disappear in plasma during the clonal evolution of the disease, opening new unforeseen perspectives for EGFR blockade in these patients. Nevertheless, the lack of detection of RAS mutations in plasma might depend on the low amount of released circulating tumor DNA (ctDNA), making it necessary a more accurate selection of patients with true RAS mutation conversions. In this liquid biopsy-based study, we assessed RAS mutational status in initially RAS-mutant patients at the time of progressive disease from any line of therapy and investigated the incidence of true conversions to plasma RAS wild-type, comparing a colon cancer specific methylation profile with a mutational signature of ctDNA. Globally, considering either mutational panel or methylation profile as reliable tests to confirm or exclude the presence of ctDNA, the percentage of "true RAS converters" was 37.5%. In our series we observed a trend toward a better PFS in patients who received anti-EGFR as second or subsequent treatment lines compared to those who did not.
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Affiliation(s)
- Chiara Nicolazzo
- Cancer Liquid Biopsy Unit, Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena, 324, 00161, Rome, Italy.
| | - Ludovic Barault
- Department of Oncology, University of Torino, Strada Provinciale, 142 km 3,95, 10060, Candiolo, TO, Italy; Candiolo Cancer Institute, FPO - IRCCS, Strada Provinciale, 142 km 3,95, 10060, Candiolo, TO, Italy.
| | - Salvatore Caponnetto
- Department of Radiology, Oncology and Pathology, Sapienza University of Rome, Viale del Policlinico, 155, 00161, Rome, Italy.
| | - Gianluigi De Renzi
- Cancer Liquid Biopsy Unit, Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena, 324, 00161, Rome, Italy.
| | - Francesca Belardinilli
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena, 291, 00161, Rome, Italy.
| | - Irene Bottillo
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Circonvallazione Gianicolense, 87, 00152, Rome, Italy.
| | - Simone Bargiacchi
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Circonvallazione Gianicolense, 87, 00152, Rome, Italy.
| | - Marco Macagno
- Department of Oncology, University of Torino, Strada Provinciale, 142 km 3,95, 10060, Candiolo, TO, Italy; Candiolo Cancer Institute, FPO - IRCCS, Strada Provinciale, 142 km 3,95, 10060, Candiolo, TO, Italy.
| | - Paola Grammatico
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Circonvallazione Gianicolense, 87, 00152, Rome, Italy.
| | - Giuseppe Giannini
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena, 291, 00161, Rome, Italy.
| | - Enrico Cortesi
- Department of Radiology, Oncology and Pathology, Sapienza University of Rome, Viale del Policlinico, 155, 00161, Rome, Italy.
| | - Federica Di Nicolantonio
- Department of Oncology, University of Torino, Strada Provinciale, 142 km 3,95, 10060, Candiolo, TO, Italy; Candiolo Cancer Institute, FPO - IRCCS, Strada Provinciale, 142 km 3,95, 10060, Candiolo, TO, Italy.
| | - Paola Gazzaniga
- Cancer Liquid Biopsy Unit, Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena, 324, 00161, Rome, Italy.
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Pontecorvi P, Bernardini L, Capalbo A, Ceccarelli S, Megiorni F, Vescarelli E, Bottillo I, Preziosi N, Fabbretti M, Perniola G, Benedetti Panici P, Pizzuti A, Grammatico P, Marchese C. Protein-protein interaction network analysis applied to DNA copy number profiling suggests new perspectives on the aetiology of Mayer-Rokitansky-Küster-Hauser syndrome. Sci Rep 2021; 11:448. [PMID: 33432050 PMCID: PMC7801512 DOI: 10.1038/s41598-020-79827-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 12/14/2020] [Indexed: 12/21/2022] Open
Abstract
Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is a rare disease, characterised by the aplasia of vagina and uterus in women with a 46,XX karyotype. Most cases are sporadic, but familial recurrence has also been described. Herein, we investigated an Italian cohort of 36 unrelated MRKH patients to explore the presence of pathogenic copy number variations (CNVs) by array-CGH and MLPA assays. On the whole, aberrations were found in 9/36 (25%) patients. Interestingly, one patient showed a novel heterozygous microduplication at Xp22.33, not yet described in MRKH patients, containing the PRKX gene. Moreover, a novel duplication of a specific SHOX enhancer was highlighted by MLPA. To predict the potential significance of CNVs in MRKH pathogenesis, we provided a network analysis for protein-coding genes found in the altered genomic regions. Although not all of these genes taken individually showed a clear clinical significance, their combination in a computational network highlighted that the most relevant biological connections are related to the anatomical structure development. In conclusion, the results described in the present study identified novel genetic alterations and interactions that may be likely involved in MRKH phenotype determination, so adding new insights into the complex puzzle of MRKH disease.
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Affiliation(s)
- Paola Pontecorvi
- Department of Experimental Medicine, Sapienza Università Di Roma, Viale del Policlinico, 155, 00161, Rome, Italy
| | - Laura Bernardini
- Division of Medical Genetics, IRCCS Casa Sollievo Della Sofferenza Foundation, San Giovanni Rotondo, FG, Italy
| | - Anna Capalbo
- Division of Medical Genetics, IRCCS Casa Sollievo Della Sofferenza Foundation, San Giovanni Rotondo, FG, Italy
| | - Simona Ceccarelli
- Department of Experimental Medicine, Sapienza Università Di Roma, Viale del Policlinico, 155, 00161, Rome, Italy
| | - Francesca Megiorni
- Department of Experimental Medicine, Sapienza Università Di Roma, Viale del Policlinico, 155, 00161, Rome, Italy
| | - Enrica Vescarelli
- Department of Experimental Medicine, Sapienza Università Di Roma, Viale del Policlinico, 155, 00161, Rome, Italy
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza Università di Roma, Rome, Italy
| | - Nicoletta Preziosi
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza Università di Roma, Rome, Italy
| | - Maria Fabbretti
- Division of Medical Genetics, IRCCS Casa Sollievo Della Sofferenza Foundation, San Giovanni Rotondo, FG, Italy
| | - Giorgia Perniola
- Department of Maternal, Infantile and Urological Sciences, Sapienza Università di Roma, Rome, Italy
| | | | - Antonio Pizzuti
- Department of Experimental Medicine, Sapienza Università Di Roma, Viale del Policlinico, 155, 00161, Rome, Italy.,Division of Medical Genetics, IRCCS Casa Sollievo Della Sofferenza Foundation, San Giovanni Rotondo, FG, Italy
| | - Paola Grammatico
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza Università di Roma, Rome, Italy
| | - Cinzia Marchese
- Department of Experimental Medicine, Sapienza Università Di Roma, Viale del Policlinico, 155, 00161, Rome, Italy.
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12
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Wang S, Wang Y, Wang J, Liu Z, Zhang R, Shi X, Han Y, Guo W, Bottillo I, Shao L. Six Exonic Variants in the SLC5A2 Gene Cause Exon Skipping in a Minigene Assay. Front Genet 2020; 11:585064. [PMID: 33250922 PMCID: PMC7674938 DOI: 10.3389/fgene.2020.585064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/20/2020] [Indexed: 01/16/2023] Open
Abstract
Background Familial renal glucosuria is a rare renal tubular disorder caused by SLC5A2 gene variants. Most of them are exonic variants and have been classified as missense variants. However, there is growing evidence that some of these variants can be detrimental by affecting the pre-mRNA splicing process. Therefore, we hypothesize that a certain proportion of SLC5A2 exonic variants can result in disease via interfering with the normal splicing process of the pre-mRNA. Methods We used bioinformatics programs to analyze 77 previously described presumed SLC5A2 missense variants and identified candidate variants that may alter the splicing of pre-mRNA through minigene assays. Results Our study indicated six of 7 candidate variants induced splicing alterations. Variants c.216C > A, c.294C > A, c.886G > C, c.932A > G and c.962A > G may disrupt splicing enhancer motifs and generate splicing silencer sequences resulting in the skipping of exon 3. Variants c.305C > T and c.1129G > A probably disturb splice sites leading to exon skipping. Conclusion To our knowledge, we report, for the first time, SLC5A2 exonic variants that produce alterations in pre-mRNA. Our research reinforces the importance of assessing the consequences for putative point variants at the mRNA level. Additionally, we propose that minigenes function analysis may be valuable to evaluate the impact of SLC5A2 exonic variants on pre-mRNA splicing without patients’ RNA samples.
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Affiliation(s)
- Sai Wang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China.,Department of Dermatology, Peking University First Hospital, Beijing, China
| | - Yixiu Wang
- Department of Hepatic Surgery, Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jinchao Wang
- Yantai Branch of Wenden Osteopathic Hospital, Yantai, China
| | - Zhiying Liu
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Ruixiao Zhang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Xiaomeng Shi
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Yue Han
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Wencong Guo
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Italy
| | - Leping Shao
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
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13
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Pascolini G, Valiante M, Bottillo I, Laino L, Fleischer N, Ferraris A, Grammatico P. Answer to Letter to the Editor regarding the article “Striking phenotypic overlap between Nicolaides-Baraitser and Coffin-Siris syndromes in monozygotic twins with ARID1B intragenic deletion”. Eur J Med Genet 2020; 63:103993. [DOI: 10.1016/j.ejmg.2020.103993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Bottillo I, Valiante M, Menale L, Paiardini A, Papi L, Janson G, Sestini R, Iorio A, De Simone P, Frascione P, Grammatico P. A novel CDKN2A in-frame deletion associated with pancreatic cancer-melanoma syndrome. Dermatol Online J 2020; 26:13030/qt5t22m5gk. [PMID: 32941720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023] Open
Abstract
Pancreatic cancer-melanoma syndrome (PCMS) is an inherited condition in which mutation carriers have an increased risk of malignant melanoma and/or pancreatic cancer. About 30% of PCMS cases carry mutations in CDKN2A. This gene encodes several protein isoforms, one of which, known as p16, regulates the cell-cycle by interacting with CDK4/CDK6 kinases and with several non-CDK proteins. Herein, we report on a novel CDKN2A germline in-frame deletion (c.52_57delACGGCC) found in an Italian family with PCMS. By segregation analysis, the c.52_57delACGGCC was proven to segregate in kindred with cutaneous melanoma (CM), in kindred with CM and pancreatic cancer, and in a single case presenting only with pancreatic cancer. In the literature, duplication mapping in the same genic region has been already reported at the germline level in several unrelated CM cases as a variant of unknown clinical significance. A computational approach for studying the effect of mutational changes over p16 protein structure showed that both the deletion and the duplication of the c.52_57 nucleotides result in protein misfolding and loss of interactors' binding. In conclusion, the present results argue that the quantitative alteration of nucleotides c.52_57 has a pathogenic role in p16 function and that the c.52_57delACGGCC is associated with PCMS.
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Affiliation(s)
- Irene Bottillo
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome.
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15
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Mosca S, Cardinali G, Flori E, Briganti S, Bottillo I, Mileo AM, Maresca V. The PI3K pathway induced by αMSH exerts a negative feedback on melanogenesis and contributes to the release of pigment. Pigment Cell Melanoma Res 2020; 34:72-88. [PMID: 32608114 DOI: 10.1111/pcmr.12910] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 06/15/2020] [Accepted: 06/22/2020] [Indexed: 02/06/2023]
Abstract
The melanocortin-1 receptor (MC1R) belongs to the family of the G protein-coupled receptor (GPCR). Activated GPCRs can promote the phosphoinositide 3-kinase (PI3K) pathway. Few studies deal with the role of the PI3K pathway activation in response to αMSH. On B16-F10 cell line, we investigated the αMSH-dependent modulation of pAKT/AKT, as a key element of the PI3K pathway after rapid and prolonged stimulation. We demonstrated that αMSH triggers a rapid modulation of AKT which culminates in an increase in its phosphorylation. We highlighted a comparable upregulation of pAKT after exposure to αMSH on primary cultures of normal human melanocytes (NHMs) expressing a wild-type MC1R. On B16-F10 cells, NHMs, and an ex vivo model of human skin biopsies, we explored the influence of PI3K/AKT signaling triggered by αMSH, focusing on the control of melanogenesis and pigment release. We showed that the αMSH-dependent PI3K/AKT pathway exerts a negative feedback on melanogenesis and promotes the extracellular release of pigment. We strengthened the role of the PI3K/AKT pathway triggered by αMSH in preserving redox equilibrium and genome integrity, highlighting its role in affecting cell survival.
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Affiliation(s)
- Sarah Mosca
- Laboratory of Cutaneous Physiopathology, San Gallicano Dermatological Institute IRCCS, Rome, Italy
| | - Giorgia Cardinali
- Laboratory of Cutaneous Physiopathology, San Gallicano Dermatological Institute IRCCS, Rome, Italy
| | - Enrica Flori
- Laboratory of Cutaneous Physiopathology, San Gallicano Dermatological Institute IRCCS, Rome, Italy
| | - Stefania Briganti
- Laboratory of Cutaneous Physiopathology, San Gallicano Dermatological Institute IRCCS, Rome, Italy
| | - Irene Bottillo
- Laboratory of Medical Genetics, Department of Molecular Medicine, San Camillo Forlanini Hospital, Sapienza University of Rome, Rome, Italy
| | - Anna M Mileo
- Department of Research Advanced Diagnostic and Technological Innovation - Tumor Immunology and Immunotherapy Unit, IRCCS-Regina Elena National Cancer Institute, Rome, Italy
| | - Vittoria Maresca
- Laboratory of Cutaneous Physiopathology, San Gallicano Dermatological Institute IRCCS, Rome, Italy
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16
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Malapelle U, Pepe F, Pisapia P, Sgariglia R, Nacchio M, De Luca C, Lacalamita R, Tommasi S, Pinto R, Palomba G, Palmieri G, Vacirca D, Barberis M, Bottillo I, Grammatico P, Grillo LR, Costa V, Smeraglio R, Bruzzese D, Troncone G. Harmonization of Next-Generation Sequencing Procedure in Italian Laboratories: A Multi-Institutional Evaluation of the SiRe® Panel. Front Oncol 2020; 10:236. [PMID: 32219061 PMCID: PMC7078327 DOI: 10.3389/fonc.2020.00236] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/12/2020] [Indexed: 01/08/2023] Open
Abstract
Background: Next-generation sequencing (NGS) needs to be validated and standardized to ensure that cancer patients are reliably selected for target treatments. In Italy, NGS is performed in several institutions and harmonization of wet and dry procedures is needed. To this end, a consortium of five different laboratories, covering the most part of the Italian peninsula, was constituted. A narrow gene panel (SiRe®) covering 568 clinically relevant mutations in six different genes (EGFR, KRAS, NRAS, BRAF, cKIT, and PDGFRα) with a predictive role for therapy selection in non-small cell lung cancer (NSCLC), gastrointestinal stromal tumor, colorectal carcinoma (CRC), and melanoma was evaluated in each participating laboratory. Methods: To assess the NGS inter-laboratory concordance, the SiRe® panel, with a related kit and protocol for library preparation, was used in each center to analyze a common set of 20 NSCLC and CRC routine samples. Concordance rate, in terms of mutation detected and relative allelic frequencies, was assessed. Then, each institution prospectively analyzed an additional set of 40 routine samples (for a total of 160 specimens) to assess the reproducibility of the NGS run parameters in each institution. Results: An inter-laboratory agreement of 100% was reached in analyzing the data obtained from the 20 common sample sets; the concordance rate of allelic frequencies distribution was 0.989. The prospective analysis of the run metric parameters obtained by each center locally showed that the analytical performance of the SiRe® panel in the different institutions was highly reproducible. Conclusions: The SiRe® panel represents a robust diagnostic tool to harmonize the NGS procedure in different Italian laboratories.
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Affiliation(s)
- Umberto Malapelle
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Francesco Pepe
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Pasquale Pisapia
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Roberta Sgariglia
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Mariantonia Nacchio
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Caterina De Luca
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Rosanna Lacalamita
- Molecular Diagnostics and Pharmacogenetics Unit, IRCCS Istituto Tumori "Giovanni Paolo II,", Bari, Italy
| | - Stefania Tommasi
- Molecular Diagnostics and Pharmacogenetics Unit, IRCCS Istituto Tumori "Giovanni Paolo II,", Bari, Italy
| | - Rosamaria Pinto
- Molecular Diagnostics and Pharmacogenetics Unit, IRCCS Istituto Tumori "Giovanni Paolo II,", Bari, Italy
| | - Grazia Palomba
- Unit of Cancer Genetics, Institute of Biomolecular Chemistry (ICB), National Research Council (CNR), Sassari, Italy
| | - Giuseppe Palmieri
- Unit of Cancer Genetics, Institute of Biomolecular Chemistry (ICB), National Research Council (CNR), Sassari, Italy
| | - Davide Vacirca
- Pathology Unit, European Institute of Oncology, Milan, Italy
| | | | - Irene Bottillo
- Laboratory of Medical Genetics, Department of Molecular Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Paola Grammatico
- Laboratory of Medical Genetics, Department of Molecular Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Lucia Rosalba Grillo
- Department of Pathology, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Valerio Costa
- Institute of Genetics and Biophysics (CNR), Naples, Italy
| | - Riccardo Smeraglio
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Dario Bruzzese
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Giancarlo Troncone
- Department of Public Health, University of Naples Federico II, Naples, Italy
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17
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Lipari M, Wypasek E, Karpinski M, Tomkiewicz-Pajak L, Laino L, Binni F, Giannarelli D, Rubis P, Petkow-Dimitrow P, Undas A, Grammatico P, Bottillo I. Identification of a variant hotspot in MYBPC3 and of a novel CSRP3 autosomal recessive alteration in a cohort of Polish cases affected by hypertrophic cardiomyopathy. Pol Arch Intern Med 2020; 130:89-99. [DOI: 10.20452/pamw.15130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Bottillo I, Valiante M, Menale L, Paiardini A, Papi L, Janson G, Sestini R, Iorio A, De Simone P, Frascione P, Grammatico P. A novel CDKN2A in-frame deletion associated with pancreatic cancer-melanoma syndrome. Dermatol Online J 2020. [DOI: 10.5070/d3268049891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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19
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Pascolini G, Valiante M, Bottillo I, Laino L, Fleischer N, Ferraris A, Grammatico P. Striking phenotypic overlap between Nicolaides-Baraitser and Coffin-Siris syndromes in monozygotic twins with ARID1B intragenic deletion. Eur J Med Genet 2019; 63:103739. [PMID: 31421289 DOI: 10.1016/j.ejmg.2019.103739] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/05/2019] [Accepted: 08/13/2019] [Indexed: 11/15/2022]
Abstract
The chromatin remodeling AT-Rich interaction domain containing 1B protein (ARID1B) also known as BAF-associated factor, 250-KD, B (BAF250B) codified by the ARID1B gene (MIM#614556), is a small subunit of the mammalian SWI/SNF or BAF complex, an ATP-dependent protein machinery which is able to activate or repress gene transcription, allowing protein access to histones through DNA relaxed conformation. ARID1B gene mutations have been associated with two hereditary syndromic conditions, namely Coffin-Siris (CSS, MIM#135900) and Nicolaides-Baraitser syndromes (NCBRS, MIM#601358), characterized by neurodevelopment delay, craniofacial dysmorphisms and skeletal anomalies. Furthermore, intellectual impairment and central nervous system (CNS) alterations, comprising abnormal corpus callosum, have been associated with mutations in this gene. Moreover, ARID1B anomalies resulted to be involved in neoplastic events and Hirschprung disease. Here we report on two monozygotic male twins, displaying clinical appearance strikingly resembling NCBRS and CSS phenotype, who resulted carriers of a novel 6q25.3 microdeletion, encompassing only part of the ARID1B gene. The deleted segment was not inherited from the only parent tested and afflicted the first exons of the gene, coding for protein disordered region. We also provide, for the first time, a review of previously published ARID1B mutated patients with NCBRS and CSS phenotype and a computer-assisted dysmorphology analysis of NCBRS and ARID1B related CSS individuals, through the Face2Gene suite, confirming the existence of highly overlapping facial gestalt of both conditions. The present findings indicate that ARID1B could be considered a contributing gene not only in CSS but also in NCBRS phenotype, although the main gene related to this latter condition is the SMARCA2 gene (MIM#600014), another component of the BAF complex. So, ARID1B study should be considered in such individuals.
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Affiliation(s)
- Giulia Pascolini
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy.
| | - Michele Valiante
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Irene Bottillo
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Luigi Laino
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | | | - Alessandro Ferraris
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Paola Grammatico
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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20
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Han Y, Zhao X, Wang S, Wang C, Tian D, Lang Y, Bottillo I, Wang X, Shao L. Eleven novel SLC12A1 variants and an exonic mutation cause exon skipping in Bartter syndrome type I. Endocrine 2019; 64:708-718. [PMID: 30790175 DOI: 10.1007/s12020-019-01856-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 01/28/2019] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Bartter syndrome type I (BS1) has been rarely reported in large groups. On the other hand, the phenomenon of exon skipping, in which exonic mutations result in abnormal splicing, has been reported to be associated with various diseases. Specifically, mutations that result in the disruption of exonic splicing enhancers (ESEs) and/or the creation of exonic splicing silencers (ESSs) can promote exon skipping. However, the aberrant exon skipping caused by an exonic variant in such splicing regulatory elements (SREs) sequences has never been reported in the causal gene of SLC12A1 in BS1. METHODS We analyze the variants in nine Chinese families with BS1, including eight with antenatal BS (aBS) and one presenting as classical BS (cBS), by next-generation sequencing. Then we used bioinformatics programs to analyze all these variants found in this study and identify candidate mutations that may induce exon skipping. Furthermore, the effects of identified variants were classified according to the 2015 American College of Medical Genetics and Genomics (ACMG) standards and guidelines. RESULTS Fifteen different variants of SLC12A1 gene were identified, including 11 novel ones. Two of the nine probands were homozygotes, the rest seven ones were compound heterozygotes. One candidate variant (c.1435C>G), not only significantly reduced ESEs scores but also markedly increased ESSs scores, were further investigated by mini-gene splicing assay, and found this single-nucleotide substitution causes abnormal splicing in vitro (exclusion of exon 11). Finally, among 15 variants, 9, 3, and 3 were classified as "pathogenic variants", "likely pathogenic variants", "variants with uncertain significance", respectively. CONCLUSION These data would enrich the human gene mutation database (HGMD) and would provide valuable references to the genetic counseling and diagnosis of BS1 for Chinese population. Additionally, our results suggest that aberrant exon skipping is one previously unrecognized mechanism by which an exonic variant in SLC12A1 can lead to BS1.
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Affiliation(s)
- Yue Han
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, 266071, Qingdao, People's Republic of China
- Central Laboratory, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China
| | - Xiangzhong Zhao
- Central Laboratory, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China
| | - Sai Wang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, 266071, Qingdao, People's Republic of China
- Central Laboratory, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China
| | - Cui Wang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, 266071, Qingdao, People's Republic of China
- Central Laboratory, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China
| | - Dongxu Tian
- Department of Urology, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China
| | - Yanhua Lang
- Department of Nursing, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, 00185, Italy
| | - Xinsheng Wang
- Department of Urology, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China.
| | - Leping Shao
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, 266071, Qingdao, People's Republic of China.
- Central Laboratory, The Affiliated Hospital of Qingdao University, 266003, Qingdao, People's Republic of China.
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Zhang R, Wang J, Wang Q, Han Y, Liu X, Bottillo I, Lang Y, Shao L. Identification of a novel TSC2 c.3610G > A, p.G1204R mutation contribute to aberrant splicing in a patient with classical tuberous sclerosis complex: a case report. BMC Med Genet 2018; 19:173. [PMID: 30236073 PMCID: PMC6149227 DOI: 10.1186/s12881-018-0686-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 09/12/2018] [Indexed: 01/27/2023]
Abstract
Background Tuberous sclerosis complex (TSC) is an autosomal dominant disorder characterized by hamartomas in any organ systems. Mutations in the TSC1 or TSC2 gene lead to the dysfunction of hamartin or tuberin proteins, which cause tuberous sclerosis complex. Case presentation We describe the clinical characteristics of patients from a Chinese family with tuberous sclerosis complex and analyze the functional consequences of their causal genetic mutations. A novel heterozygous mutation (c.3610G > A) at the last nucleotide of exon 29 in TSC2 was identified. On the protein level, this variant was presumed to be a missense mutation (p.Gly1204Arg). However, the splicing assay revealed that this mutation also leads to the whole TSC2 exon 29 skipping, besides the wild-type transcript. The mutated transcript results in an in-frame deletion of 71 amino acids (p.Gly1133_Thr1203del) and its ratio with the normal splice product is of about 44:56. Conclusions The novel c.3610G > A TSC2 mutation was identified in association with tuberous sclerosis complex. And it was proven to code both for a missense-carrying transcript (56%), and for an isoform lacking exon 29 (44%). Electronic supplementary material The online version of this article (10.1186/s12881-018-0686-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ruixiao Zhang
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, People's Republic of China.,Central Laboratory, the Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China
| | - Jianhong Wang
- Organ Transplantation Center, the Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China
| | - Qing Wang
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China
| | - Yue Han
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, People's Republic of China.,Central Laboratory, the Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China
| | - Xuejun Liu
- Department of Radiology, the Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, 00185, Rome, Italy
| | - Yanhua Lang
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, People's Republic of China
| | - Leping Shao
- Department of Nephrology, the Affiliated Qingdao Municipal Hospital of Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, People's Republic of China. .,Central Laboratory, the Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China.
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22
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Lu J, Zhao X, Paiardini A, Lang Y, Bottillo I, Shao L. Familial hypomagnesaemia, Hypercalciuria and Nephrocalcinosis associated with a novel mutation of the highly conserved leucine residue 116 of Claudin 16 in a Chinese patient with a delayed diagnosis: a case report. BMC Nephrol 2018; 19:181. [PMID: 30005619 PMCID: PMC6045852 DOI: 10.1186/s12882-018-0979-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 06/28/2018] [Indexed: 01/23/2023] Open
Abstract
Background Sixty mutations of claudin 16 coding gene have been reported in familial hypomagnesemia with hypercalciuria and nephrocalcinosis (FHHNC) patients. Recent investigations revealed that a highly conserved glycine-leucine-tryptophan (115G-L-W117) motif in the first extracellular segment (ESC1) of claudin 16 might be essential for stabilization of the appropriately folded ECS1 structure and conservation of normal claudin 16 function. However, neither missense nor nonsense mutation has ever been described in this motif. Our study aimed at identifying mutations in a Chinese patient with FHHNC and exploring the association between genotype and phenotype. Case presentation A 33-year-old female presented with 4 years history of recurrent acute pyelonephritis without other notable past medical history. Her healthy parents, who aged 56 and 53 respectively, were second cousins, and her only sibling died from renal failure without definite cause at age 25. Renal ultrasound imaging demonstrated atrophic kidneys and bilateral nephrocalcinosis. The laboratory workup revealed impaired renal function (Stage CKD IV), hypocalcemia and mild hypomagnesemia, accompanied with marked renal loss of magnesium and hypercalciuria. During the follow-up, treatment with calcitriol and calcium but not with magnesium was difficult to achieve normal serum calcium levels, whereas her serum magnesium concentration fluctuated within normal ranges. In the end, the patient unavoidably reached ESRD at 36 years old. The clinical features and family history suggested the diagnosis of FHHNC. To make a definite diagnosis, we use whole-exome sequencing to identify the disease-causing mutations and Sanger sequencing to confirm the mutation co-segregation in the family. As a result, a novel homozygous mutation (c.346C > G, p.Leu116Val) in 115G-L-W117 motif of claudin 16 was identified. Her parents, grandmother and one of her cousins carried heterozygous p.Leu116Val, whereas 200 unrelated controls did not carry this mutation. Conclusions We described a delayed diagnosis patient with FHHNC in the Chinese population and identified a novel missense mutation in the highly conserved 115G-L-W117 motif of claudin 16 for the first time. According to the reported data and the information deduced from 3D modeling, we speculate that this mutation probably reserve partial residual function which might be related to the slight phenotype of the patient. Electronic supplementary material The online version of this article (10.1186/s12882-018-0979-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jingru Lu
- Department of Nephrology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, China.,Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao, 266555, China
| | - Xiangzhong Zhao
- Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao, 266555, China
| | - Alessandro Paiardini
- Dipartimento di Scienze Biochimiche "A. Rossi Fanelli", Sapienza - Università di Roma, 00185, Rome, Italy
| | - Yanhua Lang
- Department of Nephrology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Leping Shao
- Department of Nephrology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, China. .,Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao, 266555, China.
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Brancati F, Camerota L, Colao E, Vega-Warner V, Zhao X, Zhang R, Bottillo I, Castori M, Caglioti A, Sangiuolo F, Novelli G, Perrotti N, Otto EA. Biallelic variants in the ciliary gene TMEM67 cause RHYNS syndrome. Eur J Hum Genet 2018; 26:1266-1271. [PMID: 29891882 DOI: 10.1038/s41431-018-0183-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 04/27/2018] [Accepted: 05/08/2018] [Indexed: 11/09/2022] Open
Abstract
A rare syndrome was first described in 1997 in a 17-year-old male patient presenting with Retinitis pigmentosa, HYpopituitarism, Nephronophthisis and Skeletal dysplasia (RHYNS). In the single reported familial case, two brothers were affected, arguing for X-linked or recessive mode of inheritance. Up to now, the underlying genetic basis of RHYNS syndrome remains unknown. Here we applied whole-exome sequencing in the originally described family with RHYNS to identify compound heterozygous variants in the ciliary gene TMEM67. Sanger sequencing confirmed a paternally inherited nonsense c.622A > T, p.(Arg208*) and a maternally inherited missense variant c.1289A > G, p.(Asp430Gly), which perturbs the correct splicing of exon 13. Overall, TMEM67 showed one of the widest clinical continuum observed in ciliopathies ranging from early lethality to adults with liver fibrosis. Our findings extend the spectrum of phenotypes/syndromes resulting from biallelic TMEM67 variants to now eight distinguishable clinical conditions including RHYNS syndrome.
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Affiliation(s)
- Francesco Brancati
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy. .,Laboratory of Molecular and Cell Biology, Istituto Dermopatico dell'Immacolata (IDI) IRCCS, Rome, Italy.
| | - Letizia Camerota
- Laboratory of Molecular and Cell Biology, Istituto Dermopatico dell'Immacolata (IDI) IRCCS, Rome, Italy
| | - Emma Colao
- Medical Genetics Unit, Mater Domini University Hospital, Catanzaro, Italy
| | - Virginia Vega-Warner
- Division of Nephrology, Department of Pediatrics and Communicable Diseases, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
| | - Xiangzhong Zhao
- Central Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ruixiao Zhang
- Department of Nephrology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Marco Castori
- Division of Medical Genetics, IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Foggia, Italy
| | - Alfredo Caglioti
- Nephrology and Dialysis Unit, Mater Domini University Hospital, Catanzaro, Italy
| | - Federica Sangiuolo
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Giuseppe Novelli
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Nicola Perrotti
- Department of Health Sciences, University of Catanzaro Magna Graecia, Catanzaro, Italy
| | - Edgar A Otto
- Division of Nephrology, Department of Internal Medicine, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
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Shao L, Cui L, Lu J, Lang Y, Bottillo I, Zhao X. A novel mutation in exon 9 of Cullin 3 gene contributes to aberrant splicing in pseudohypoaldosteronism type II. FEBS Open Bio 2018; 8:461-469. [PMID: 29511623 PMCID: PMC5832971 DOI: 10.1002/2211-5463.12389] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 11/26/2017] [Accepted: 01/12/2018] [Indexed: 01/30/2023] Open
Abstract
Pseudohypoaldosteronism type II (PHAII) is a rare renal tubular disease that is inherited in an autosomal dominant manner. Mutations in four genes (WNK1,WNK4,CUL3, and KLHL3) have been identified to be responsible for this disease. Cullin 3 (CUL3) and KLHL3 are subunits of Cullin–RING E3 ubiquitin ligase complexes, and the serine–threonine kinases WNK1 and WNK4 are substrates of this ubiquitin ligase. For CUL3, all mutations associated with PHAII exclusively lead to exon 9 skipping. In this study, we identified a Chinese PHAII kindred caused by a novel synonymous mutation (c.1221A > G p.Glu407Glu) in CUL3, and explored its effects on exon 9 abnormal splicing through an in vitro splicing assay and study of the patients’ RNA. We obtained evidence that this synonymous mutation leads to complete exon 9 skipping, and in silico bioinformatics analysis demonstrated that the CUL3 c.1221A > G mutation might decrease the ratio of exonic splicing enhancers and silencers. This is the first report of PHAII in Chinese patients with a novel CUL3 mutation. Our findings add a novel pathogenic splicing variant to the CUL3 mutational spectrum and provide reference for further research on mechanisms of splicing modulation and development of potential therapeutic reagents for PHAII.
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Affiliation(s)
- Leping Shao
- Department of Nephrology The Affiliated Hospital of Qingdao University Qingdao China
| | - Li Cui
- Department of Nephrology The Affiliated Hospital of Qingdao University Qingdao China
| | - Jingru Lu
- Department of Nephrology The Affiliated Hospital of Qingdao University Qingdao China
| | - Yanhua Lang
- Department of Nephrology The Affiliated Hospital of Qingdao University Qingdao China
| | - Irene Bottillo
- Division of Medical Genetics Department of Molecular Medicine Sapienza University San Camillo-Forlanini Hospital Rome Italy
| | - Xiangzhong Zhao
- Central Laboratory The Affiliated Hospital of Qingdao University Qingdao China
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25
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Gerbino A, Bottillo I, Milano S, Lipari M, Zio RD, Morlino S, Mola MG, Procino G, Re F, Zachara E, Grammatico P, Svelto M, Carmosino M. Functional Characterization of a Novel Truncating Mutation in Lamin A/C Gene in a Family with a Severe Cardiomyopathy with Conduction Defects. Cell Physiol Biochem 2017; 44:1559-1577. [PMID: 29197877 DOI: 10.1159/000485651] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 11/01/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Truncating LMNA gene mutations occur in many inherited cardiomyopathy cases, but the molecular mechanisms involved in the disease they cause have not yet been systematically investigated. Here, we studied a novel frameshift LMNA variant (p.D243Gfs*4) identified in three members of an Italian family co-segregating with a severe form of cardiomyopathy with conduction defects. METHODS HEK293 cells and HL-1 cardiomyocytes were transiently transfected with either Lamin A or D243Gfs*4 tagged with GFP (or mCherry). D243Gfs*4 expression, cellular localization and its effects on diverse cellular mechanisms were evaluated with western blotting, laser-scanning confocal microscopy and video-imaging analysis in single cells. RESULTS When expressed in HEK293 cells, GFP- (or mCherry)-tagged LMNA D243Gfs*4 colocalized with calnexin within the ER. ER mislocalization of LMNA D243Gfs*4 did not significantly induce ER stress response, abnormal Ca2+ handling and apoptosis when compared with HEK293 cells expressing another truncated mutant of LMNA (R321X) which similarly accumulates within the ER. Of note, HEK293-LMNA D243Gfs*4 cells showed a significant reduction of connexin 43 (CX43) expression level, which was completely rescued by activation of the WNT/β-catenin signaling pathway. When expressed in HL-1 cardiomyocytes, D243Gfs*4 significantly impaired the spontaneous Ca2+ oscillations recorded in these cells as result of propagation of the depolarizing waves through the gap junctions between non-transfected cells surrounding a cell harboring the mutation. Furthermore, mCh-D243Gfs*4 HL-1 cardiomyocytes showed reduced CX43-dependent Lucifer Yellow (LY) loading and propagation. Of note, activation of β-catenin rescued both LY loading and LMNA D243Gfs*4 -HL-1 cells spontaneous activity propagation. CONCLUSION Overall, the present results clearly indicate the involvement of the aberrant CX43 expression/activity as a pathogenic mechanism for the conduction defects associated to this LMNA truncating alteration.
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Affiliation(s)
- Andrea Gerbino
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Irene Bottillo
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Serena Milano
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Martina Lipari
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Roberta De Zio
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Silvia Morlino
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Maria Grazia Mola
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Giuseppe Procino
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Federica Re
- Cardiology Division, Cardiac Arrhythmia Center and Cardiomyopathies Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | - Elisabetta Zachara
- Cardiology Division, Cardiac Arrhythmia Center and Cardiomyopathies Unit, San Camillo-Forlanini Hospital, Rome, Italy
| | - Paola Grammatico
- Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Maria Svelto
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Monica Carmosino
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano, Potenza, Italy
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26
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Bottillo I, La Starza R, Radio FC, Molica C, Pedace L, Pierini T, De Bernardo C, Stingeni L, Bargiacchi S, Paiardini A, Janson G, Mecucci C, Grammatico P. A novel germline mutation in CDK4 codon 24 associated to familial melanoma. Clin Genet 2017; 93:934-935. [PMID: 29124743 DOI: 10.1111/cge.13129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/21/2017] [Accepted: 08/23/2017] [Indexed: 11/28/2022]
Affiliation(s)
- I Bottillo
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - R La Starza
- Molecular Medicine Laboratory, Department of Medicine, CREO, University of Perugia, Perugia, Italy
| | - F C Radio
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - C Molica
- Molecular Medicine Laboratory, Department of Medicine, CREO, University of Perugia, Perugia, Italy
| | - L Pedace
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - T Pierini
- Molecular Medicine Laboratory, Department of Medicine, CREO, University of Perugia, Perugia, Italy
| | - C De Bernardo
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - L Stingeni
- Section of Clinical, Allergological and Venereological Dermatology, Department of Medicine, University of Perugia, Perugia, Italy
| | - S Bargiacchi
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - A Paiardini
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University, Rome, Italy
| | - G Janson
- Department of Biochemical Sciences "A. Rossi Fanelli", Sapienza University, Rome, Italy
| | - C Mecucci
- Molecular Medicine Laboratory, Department of Medicine, CREO, University of Perugia, Perugia, Italy
| | - P Grammatico
- Division/Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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Laino L, Bottillo I, Piedimonte C, Bernardini L, Torres B, Grammatico B, Bargiacchi S, Mulargia C, Calvani M, Cardona F, Castori M, Grammatico P. Clinical and molecular characterization of a boy with intellectual disability, facial dysmorphism, minor digital anomalies and a complex IL1RAPL1 intragenic rearrangement. Eur J Paediatr Neurol 2016; 20:971-976. [PMID: 27470653 DOI: 10.1016/j.ejpn.2016.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/22/2016] [Accepted: 07/02/2016] [Indexed: 01/16/2023]
Abstract
X-linked intellectual disability accounts for 10-12% of cases of cognitive impairment in males. Mutations in IL1RAPL1 are an emerging form of apparently non-syndromic X-linked intellectual disability. We report a 8-year-old intellectually disabled boy with speech delay, and unusual facial and digital anomalies who showed a novel and complex IL1RAPL1 rearrangement. It was defined by two intragenic non-contiguous duplications inherited from the unaffected mother. Chromosome X inactivation study on the mother's blood leukocytes, urinary sediment and buccal swab did not show a significant skewed inactivation. Comparison with previously described patients with IL1RAPL1 disruption was carried. Although data on craniofacial features were scanty in many papers, subtle facial dysmorphism with a thin upper lip seemed a quietly represented picture without any other genotype-phenotype correlations. Our study expands the molecular repertoire of IL1RAPL1 mutations in intellectual disability and points out the need of more accurate clinical descriptions to better define the related phenotype.
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Affiliation(s)
- Luigi Laino
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy.
| | - Irene Bottillo
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Caterina Piedimonte
- Department of Pediatrics and Child Neuropsychiatry, Sapienza University, Policlinico Umberto I University Hospital, Rome, Italy
| | - Laura Bernardini
- Unit of Cytogenetics, Mendel Laboratory, Casa Sollievo della Sofferenza Foundation, San Giovanni Rotondo, FG, Italy
| | - Barbara Torres
- Unit of Cytogenetics, Mendel Laboratory, Casa Sollievo della Sofferenza Foundation, San Giovanni Rotondo, FG, Italy
| | - Barbara Grammatico
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Simone Bargiacchi
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Claudia Mulargia
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Mauro Calvani
- Division of Pediatrics, San Camillo-Forlanini Hospital, Rome, Italy
| | - Francesco Cardona
- Department of Pediatrics and Child Neuropsychiatry, Sapienza University, Policlinico Umberto I University Hospital, Rome, Italy
| | - Marco Castori
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Paola Grammatico
- Laboratory of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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28
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Zhao X, Cui L, Lang Y, Liu T, Lu J, Wang C, Tuffery-Giraud S, Bottillo I, Wang X, Shao L. A recurrent deletion in the SLC5A2 gene including the intron 7 branch site responsible for familial renal glucosuria. Sci Rep 2016; 6:33920. [PMID: 27666404 PMCID: PMC5036194 DOI: 10.1038/srep33920] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 09/06/2016] [Indexed: 12/31/2022] Open
Abstract
Familial renal glycosuria (FRG) is caused by mutations in the SLC5A2 gene, which codes for Na+-glucose co-transporters 2 (SGLT2). The aim of this study was to analyze and identify the mutations in 16 patients from 8 families with FRG. All coding regions, including intron-exon boundaries, were analyzed using PCR followed by direct sequence analysis. Six mutations in SLC5A2 gene were identified, including five missense mutations (c.393G > C, p.K131N; c.1003A > G, p.S335G; c.1343A > G, p.Q448R; c.1420G > C, p.A474P; c.1739G > A, p.G580D) and a 22-bp deletion in intron 7 (c.886(-10_-31)del) removing the putative branch point sequence. By the minigene studies using the pSPL3 plasmids, we confirmed that the deletion c.886(-10_-31)del acts as a splicing mutation. Furthermore, we found that this deletion causes exclusion of exon 8 in the SCL5A2 transcript in patients. The mutation c.886(-10_-31)del was present in 5 (62.5%) of 8 families, and accounts for about 37.5% of the total alleles (6/16). In conclusion, six mutations resulting in FRG were found, and the c.886(-10_-31)del may be the high frequency mutation that can be screened in FRG patients with uniallelic or negative SLC5A2 mutations.
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Affiliation(s)
- Xiangzhong Zhao
- Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao 266555, China
| | - Li Cui
- Department of Nephrology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Yanhua Lang
- Department of Nephrology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Ting Liu
- Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao 266555, China.,Department of Nephrology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Jingru Lu
- Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao 266555, China.,Department of Nephrology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Cui Wang
- Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao 266555, China.,Department of Nephrology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Sylvie Tuffery-Giraud
- Laboratory of Genetics of Rare Diseases, EA7402, University of Montpellier, F-34000, France
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Circ. Gianicolense, 87, Padiglione Morgagni 00152, Rome, Italy
| | - Xinsheng Wang
- Urology, Affiliated Hospital, Qingdao University, Qingdao 266003, China
| | - Leping Shao
- Central Laboratory, The Affiliated Hospital of Qingdao University, 1677 Wutaishan Road, Qingdao 266555, China.,Department of Nephrology, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
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Bottillo I, Giordano C, Cerbelli B, D'Angelantonio D, Lipari M, Polidori T, Majore S, Bertini E, D'Amico A, Giannarelli D, De Bernardo C, Masuelli L, Musumeci F, Avella A, Re F, Zachara E, d'Amati G, Grammatico P. A novel LAMP2 mutation associated with severe cardiac hypertrophy and microvascular remodeling in a female with Danon disease: a case report and literature review. Cardiovasc Pathol 2016; 25:423-31. [PMID: 27497751 DOI: 10.1016/j.carpath.2016.07.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/19/2016] [Accepted: 07/20/2016] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Danon disease (DD) is a rare disorder characterized by cardiomyopathy, intellectual disability, and proximal myopathy. It is caused by mutations in the LAMP2 gene on X chromosome. Female patients most often present with late-onset cardiomyopathy and slow disease progression, but early-onset cases with unfavorable prognosis have been reported. CASE REPORT We describe the clinical, pathological, and molecular features of a novel LAMP2 c.453delT mutation in a female patient with severe hypertrophic cardiomyopathy, Wolff Parkinson White (WPW) syndrome and rapid progression to heart failure, requiring heart transplant. Immunohistochemical analysis of LAMP2 in the explanted heart revealed a mosaic pattern of distribution, with discrete clusters of either stained or unstained cardiac myocytes, the latter being more frequent in the septum. These findings paralleled X chromosome inactivation within the myocardium. Interestingly, multiple foci of microscarring were found on histology in the Left Ventricle (LV) free wall and septum, in a close spatial relationship with remodeling and severe stenosis of intramural coronary arterioles. CONCLUSIONS Our findings suggest that several features may contribute to the early and severe cardiac phenotype in female DD patients. The type of mutation may account for the early disease onset, while both the inhomogeneous distribution of LAMP2 loss and the presence of microvascular remodeling may be determinant in the rapid progression to heart failure.
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Affiliation(s)
- Irene Bottillo
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy.
| | - Carla Giordano
- Department of Radiological, Oncological and Pathological Sciences, Sapienza University of Rome, Rome, Italy
| | - Bruna Cerbelli
- Department of Radiological, Oncological and Pathological Sciences, Sapienza University of Rome, Rome, Italy
| | - Daniela D'Angelantonio
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Martina Lipari
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Taisia Polidori
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Silvia Majore
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Enrico Bertini
- Unit for Muscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Adele D'Amico
- Unit for Muscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Diana Giannarelli
- Biostatistic Unit, Regina Elena National Cancer Institute, Rome, Italy
| | - Carmelilia De Bernardo
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Laura Masuelli
- Department of Experimental Medicine, Sapienza University, Rome, Italy
| | - Francesco Musumeci
- Department of Cardiac Surgery, San Camillo-Forlanini Hospital, Rome, Italy
| | - Andrea Avella
- Cardiomyopathies Unit, Division of Cardiology and Cardiac Arrhythmias, San Camillo-Forlanini Hospital, Rome, Italy
| | - Federica Re
- Cardiomyopathies Unit, Division of Cardiology and Cardiac Arrhythmias, San Camillo-Forlanini Hospital, Rome, Italy
| | - Elisabetta Zachara
- Cardiomyopathies Unit, Division of Cardiology and Cardiac Arrhythmias, San Camillo-Forlanini Hospital, Rome, Italy
| | - Giulia d'Amati
- Department of Radiological, Oncological and Pathological Sciences, Sapienza University of Rome, Rome, Italy
| | - Paola Grammatico
- Medical Genetics Laboratory, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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Bottillo I, D’Angelantonio D, Caputo V, Paiardini A, Lipari M, De Bernardo C, Majore S, Castori M, Zachara E, Re F, Grammatico P. Prediction and visualization data for the interpretation of sarcomeric and non-sarcomeric DNA variants found in patients with hypertrophic cardiomyopathy. Data Brief 2016; 7:607-13. [PMID: 27054166 PMCID: PMC4802523 DOI: 10.1016/j.dib.2016.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/16/2016] [Accepted: 03/01/2016] [Indexed: 11/13/2022] Open
Abstract
Genomic technologies are redefining the understanding of genotype–phenotype relationships and over the past decade, many bioinformatics algorithms have been developed to predict functional consequences of single nucleotide variants. This article presents the data from a comprehensive computational workflow adopted to assess the biomedical impact of the DNA variants resulting from the experimental study “Molecular analysis of sarcomeric and non-sarcomeric genes in patients with hypertrophic cardiomyopathy” (Bottillo et al., 2016) [1]. Several different independently methods were employed to predict the functional consequences of alleles that result in amino acid substitutions, to study the effect of some DNA variants over the splicing process and to investigate the impact of a sequence variant with respect to the evolutionary conservation.
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Bottillo I, D'Angelantonio D, Caputo V, Paiardini A, Lipari M, De Bernardo C, Giannarelli D, Pizzuti A, Majore S, Castori M, Zachara E, Re F, Grammatico P. Molecular analysis of sarcomeric and non-sarcomeric genes in patients with hypertrophic cardiomyopathy. Gene 2016; 577:227-35. [DOI: 10.1016/j.gene.2015.11.048] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/20/2015] [Accepted: 11/29/2015] [Indexed: 10/22/2022]
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Castori M, Bottillo I, Morlino S, Barone C, Cascone P, Grammatico P, Laino L. Variability in a three-generation family with Pierre Robin sequence, acampomelic campomelic dysplasia, and intellectual disability due to a novel ∼1 Mb deletion upstream of SOX9, and including KCNJ2 and KCNJ16. ACTA ACUST UNITED AC 2015; 106:61-8. [PMID: 26663529 DOI: 10.1002/bdra.23463] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Campomelic dysplasia and acampomelic campomelic dysplasia (ACD) are allelic disorders due to heterozygous mutations in or around SOX9. Translocations and deletions involving the SOX9 5' regulatory region are rare causes of these disorders, as well as Pierre Robin sequence (PRS) and 46,XY gonadal dysgenesis. Genotype-phenotype correlations are not straightforward due to the complex epigenetic regulation of SOX9 expression during development. METHODS We report a three-generation pedigree with a novel ∼1 Mb deletion upstream of SOX9 and including KCNJ2 and KCNJ16, and ascertained for dominant transmission of PRS. RESULTS Further characterization of the family identified subtle appendicular anomalies and a variable constellation of axial skeletal features evocative of ACD in several members. Affected males showed learning disability. CONCLUSION The identified deletion was smaller than all other chromosome rearrangements associated with ACD. Comparison with other reported translocations and deletions involving this region allowed further refining of genotype-phenotype correlations and an update of the smallest regions of overlap associated with the different phenotypes. Intrafamilial variability in this pedigree suggests a phenotypic continuity between ACD and PRS in patients carrying mutations in the SOX9 5' regulatory region.
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Affiliation(s)
- Marco Castori
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Silvia Morlino
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Chiara Barone
- Center for Genetic Counseling and Reproductive Teratology, Maternal and Child Health Department, Garibaldi Nesima Hospital, Catania, Italy
| | - Piero Cascone
- Division of Maxillo-Facial Surgery, Sapienza University, Policlinico Umberto I Hospital, Rome, Italy
| | | | - Paola Grammatico
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Luigi Laino
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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Wang X, Zhao X, Wang X, Yao J, Zhang F, Lang Y, Tuffery-Giraud S, Bottillo I, Shao L. Two Novel HOGA1 Splicing Mutations Identified in a Chinese Patient with Primary Hyperoxaluria Type 3. Am J Nephrol 2015; 42:78-84. [PMID: 26340091 DOI: 10.1159/000439232] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Twenty-six HOGA1 mutations have been reported in primary hyperoxaluria (PH) type 3 (PH3) patients with c.700 + 5G>T accounting for about 50% of the total alleles. However, PH3 has never been described in Asians. METHODS A Chinese child with early-onset nephrolithiasis was suspected of having PH. We searched for AGXT, GRHPR and HOGA1 gene mutations in this patient and his parents. All coding regions, including intron-exon boundaries, were analyzed using PCR followed by direct sequence analysis. RESULTS Two heterozygous mutations not previously described in the literature about HOGA1 were identified (compound heterozygous). One mutation was a successive 2 bp substitution at the last nucleotide of exon 6 and at the first nucleotide of intron 6, respectively (c.834_834 + 1GG>TT), while the other one was a guanine to adenine substitution of the last nucleotide of exon 6 (c.834G>A). Direct sequencing analysis failed to find these mutations in 100 unrelated healthy subjects and the functional role on splicing of both variants found in this study was confirmed by a minigene assay based on the pSPL3 exon trapping vector. In addition, we found a SNP in this family (c.715G>A, p.V239I). There were no mutations detected in AGXT and GRHPR. CONCLUSION Two novel HOGA1 mutations were identified in association with PH3. This is the first description and investigation on mutant gene analysis of PH3 in an Asian.
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Castori M, Bottillo I, Laino L, Morlino S, Grammatico B, Grammatico P. An additional patient with 3q27.3 microdeletion syndrome. J Child Neurol 2015; 30:500-4. [PMID: 25038125 DOI: 10.1177/0883073814539557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 05/15/2014] [Indexed: 12/17/2022]
Abstract
The 3q27.3 microdeletion syndrome has been recently delineated in 7 subjects from 5 families sharing a 1.4 Mb smallest region of overlap. This condition appears recognizable by the association of Marfanoid habitus, mild but distinctive facial dysmorphism, intellectual disability, psychosis, and mood disorder. Here, we describe an additional 17-year-old man with an ~7.7-Mb deletion encompassing the 3q27.3 microdeletion critical region, previously run undetected at standard karyotyping. The constellation of major clinical findings overlaps with those reported in the 7 previously published patients and thus confirms the existence of a strongly recognizable syndrome linked to imbalance of 3q27.3. The role of AHSG and, possibly, of other genes in determining the 3q27.3 microdeletion habitus is discussed by comparison of the deleted segments. The involvement of adjacent loci and genes, such as OPA1 and GP5, may contribute in this patient to novel satellite features, such as optic atrophy and subclinical coagulopathy.
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Affiliation(s)
- Marco Castori
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Luigi Laino
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Silvia Morlino
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Barbara Grammatico
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
| | - Paola Grammatico
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, Rome, Italy
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Laino L, Majore S, Preziosi N, Grammatico B, De Bernardo C, Scommegna S, Rapone AM, Marrocco G, Bottillo I, Grammatico P. Disorders of sex development: a genetic study of patients in a multidisciplinary clinic. Endocr Connect 2014; 3:180-92. [PMID: 25248670 PMCID: PMC4195882 DOI: 10.1530/ec-14-0085] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Sex development is a process under genetic control directing both the bi-potential gonads to become either a testis or an ovary, and the consequent differentiation of internal ducts and external genitalia. This complex series of events can be altered by a large number of genetic and non-genetic factors. Disorders of sex development (DSD) are all the medical conditions characterized by an atypical chromosomal, gonadal, or phenotypical sex. Incomplete knowledge of the genetic mechanisms involved in sex development results in a low probability of determining the molecular definition of the genetic defect in many of the patients. In this study, we describe the clinical, cytogenetic, and molecular study of 88 cases with DSD, including 29 patients with 46,XY and disorders in androgen synthesis or action, 18 with 46,XX and disorders in androgen excess, 17 with 46,XY and disorders of gonadal (testicular) development, 11 classified as 46,XX other, eight with 46,XX and disorders of gonadal (ovarian) development, and five with sex chromosome anomalies. In total, we found a genetic variant in 56 out of 88 of them, leading to the clinical classification of every patient, and we outline the different steps required for a coherent genetic testing approach. In conclusion, our results highlight the fact that each category of DSD is related to a large number of different DNA alterations, thus requiring multiple genetic studies to achieve a precise etiological diagnosis for each patient.
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Affiliation(s)
- Luigi Laino
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Silvia Majore
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Nicoletta Preziosi
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Barbara Grammatico
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Carmelilia De Bernardo
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Salvatore Scommegna
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Anna Maria Rapone
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Giacinto Marrocco
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Irene Bottillo
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
| | - Paola Grammatico
- Department of Molecular MedicineMedical Genetics, San Camillo-Forlanini Hospital, Sapienza University, A.O. San Camillo-Forlanini, Padiglione Morgagni, I piano, UOC Laboratorio di Genetica Medica, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatrics and HematologySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, ItalyPsychology DepartmentSan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Dipartimento di Pscicologia, Circonvallazione Gianicolense 87, Rome 00152, ItalyDepartment of Pediatric SurgerySan Camillo-Forlanini Hospital, A.O. San Camillo-Forlanini, Padiglione Baccelli, II piano, Pediatria ed Ematologia Pediatrica, Circonvallazione Gianicolense 87, Rome 00152, Italy
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Pinna V, Lanari V, Daniele P, Consoli F, Agolini E, Margiotti K, Bottillo I, Torrente I, Bruselles A, Fusilli C, Ficcadenti A, Bargiacchi S, Trevisson E, Forzan M, Giustini S, Leoni C, Zampino G, Digilio MC, Dallapiccola B, Clementi M, Tartaglia M, De Luca A. p.Arg1809Cys substitution in neurofibromin is associated with a distinctive NF1 phenotype without neurofibromas. Eur J Hum Genet 2014; 23:1068-71. [PMID: 25370043 DOI: 10.1038/ejhg.2014.243] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 09/26/2014] [Accepted: 10/01/2014] [Indexed: 02/05/2023] Open
Abstract
Analysis of 786 NF1 mutation-positive subjects with clinical diagnosis of neurofibromatosis type 1 (NF1) allowed to identify the heterozygous c.5425C>T missense variant (p.Arg1809Cys) in six (0.7%) unrelated probands (three familial and three sporadic cases), all exhibiting a mild form of disease. Detailed clinical characterization of these subjects and other eight affected relatives showed that all individuals had multiple cafè-au-lait spots, frequently associated with skinfold freckling, but absence of discrete cutaneous or plexiform neurofibromas, Lisch nodules, typical NF1 osseous lesions or symptomatic optic gliomas. Facial features in half of the individuals were suggestive of Noonan syndrome. Our finding and revision of the literature consistently indicate that the c.5425C>T change is associated with a distinctive, mild form of NF1, providing new data with direct impact on genetic counseling and patient management.
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Affiliation(s)
- Valentina Pinna
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
| | - Valentina Lanari
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
| | - Paola Daniele
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
| | - Federica Consoli
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
| | - Emanuele Agolini
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
| | - Katia Margiotti
- 1] IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy [2] PRABB-Centro Integrato di Ricerca, Campus Bio-Medico University, Rome, Italy
| | - Irene Bottillo
- 1] IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy [2] Division of Medical Genetics, Department of Molecular Medicine, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy
| | - Isabella Torrente
- 1] IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy [2] San Camillo-Forlanini Hospital, Rome, Italy
| | - Alessandro Bruselles
- Dipartimento di Ematologia, Oncologia e Medicina Molecolare, Istituto Superiore di Sanità, Rome, Italy
| | - Caterina Fusilli
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
| | - Anna Ficcadenti
- Pediatric Division, Department of Clinical Sciences, Rare Diseases Regional Centre, Polytechnic University of Marche Ospedali Riuniti, Ancona, Italy
| | - Sara Bargiacchi
- Genetics and Molecular Medicine Unit, Anna Meyer Children's University Hospital, Florence, Italy
| | - Eva Trevisson
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Padova, Italy
| | - Monica Forzan
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Padova, Italy
| | - Sandra Giustini
- Department of Dermatology, Sapienza University of Rome, Policlinico Umberto I, Rome, Italy
| | - Chiara Leoni
- Istituto di Clinica Pediatrica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Giuseppe Zampino
- Istituto di Clinica Pediatrica, Università Cattolica del Sacro Cuore, Rome, Italy
| | | | | | - Maurizio Clementi
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Padova, Italy
| | - Marco Tartaglia
- Dipartimento di Ematologia, Oncologia e Medicina Molecolare, Istituto Superiore di Sanità, Rome, Italy
| | - Alessandro De Luca
- IRCCS-Casa Sollievo della Sofferenza Hospital, Mendel Institute, Rome, Italy
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Castori M, Bottillo I, D'Angelantonio D, Morlino S, De Bernardo C, Scassellati Sforzolini G, Silvestri E, Grammatico P. A 22-Week-Old Fetus with Nager Syndrome and Congenital Diaphragmatic Hernia due to a Novel SF3B4 Mutation. Mol Syndromol 2014; 5:241-4. [PMID: 25337072 DOI: 10.1159/000365769] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2014] [Indexed: 11/19/2022] Open
Abstract
Nager syndrome, or acrofacial dysostosis type 1 (AFD1), is a rare multiple malformation syndrome characterized by hypoplasia of first and second branchial arches derivatives and appendicular anomalies with variable involvement of the radial/axial ray. In 2012, AFD1 has been associated with dominant mutations in SF3B4. We report a 22-week-old fetus with AFD1 associated with diaphragmatic hernia due to a previously unreported SF3B4 mutation (c.35-2A>G). Defective diaphragmatic development is a rare manifestation in AFD1 as it is described in only 2 previous cases, with molecular confirmation in 1 of them. Our molecular finding adds a novel pathogenic splicing variant to the SF3B4 mutational spectrum and contributes to defining its prenatal/fetal phenotype.
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Affiliation(s)
- Marco Castori
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Irene Bottillo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Daniela D'Angelantonio
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Silvia Morlino
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Carmelilia De Bernardo
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, Rome, Italy
| | | | - Evelina Silvestri
- Unit of Fetal and Neonatal Pathology, Division of Pathology, San Camillo-Forlanini Hospital, Rome, Italy
| | - Paola Grammatico
- Division of Medical Genetics, Department of Molecular Medicine, Sapienza University, Rome, Italy
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Bottillo I, Castori M, De Bernardo C, Fabbri R, Grammatico B, Preziosi N, Scassellati GS, Silvestri E, Spagnuolo A, Laino L, Grammatico P. Prenatal diagnosis and post-mortem examination in a fetus with thrombocytopenia-absent radius (TAR) syndrome due to compound heterozygosity for a 1q21.1 microdeletion and a RBM8A hypomorphic allele: a case report. BMC Res Notes 2013; 6:376. [PMID: 24053387 PMCID: PMC3849061 DOI: 10.1186/1756-0500-6-376] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 09/17/2013] [Indexed: 11/14/2022] Open
Abstract
Background Thrombocytopenia–absent radius syndrome is a rare autosomal recessive disorder characterized by megakaryocytic thrombocytopenia and longitudinal limb deficiencies mostly affecting the radial ray. Most patients are compound heterozygotes for a 200 kb interstitial microdeletion in 1q21.1 and a hypomorphic allele in RBM8A, mapping in the deleted segment. At the moment, the complete molecular characterization of thrombocytopenia–absent radius syndrome is limited to a handful of patients mostly ascertained in the pediatric age Case presentation We report on a fetus with bilateral upper limb deficiency found at standard prenatal ultrasound examination. The fetus had bilateral radial agenesis and humeral hypo/aplasia with intact thumbs, micrognathia and urinary anomalies, indicating thrombocytopenia–absent radius syndrome. Molecular studies demonstrated compound heterozygosity for the 1q21.1 microdeletion and the RBM8A rs139428292 variant at the hemizygous state, inherited from the mother and father, respectively Conclusion The molecular information allowed prenatal diagnosis in the following pregnancy resulting in the birth of a healthy carrier female. A review was carried out with the attempt to the trace the fetal ultrasound presentation of thrombocytopenia–absent radius syndrome and discussing opportunities for second-tier molecular studies within a multidisciplinary setting.
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Affiliation(s)
- Irene Bottillo
- Department of Molecular Medicine, Medical Genetics, San Camillo-Forlanini Hospital, Sapienza University, Rome, Italy.
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Ruggieri M, Mastrangelo M, Spalice A, Mariani R, Torrente I, Polizzi A, Bottillo I, Di Biase C, Iannetti P. Bilateral (opercular and paracentral lobular) polymicrogyria and neurofibromatosis type 1. Am J Med Genet A 2011; 155A:582-5. [PMID: 21344624 DOI: 10.1002/ajmg.a.33318] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Accepted: 12/16/2009] [Indexed: 11/07/2022]
Abstract
Anecdotal cases of polymicrogyria (PMG; a malformation of cortical development consisting of an excessive number of small gyri with abnormal lamination) in patients with neurofibromatosis type 1 (NF1) have been described; however, the cases were unilateral and had negative NF1 genetic testing. We describe an 11-year-old girl with NF1 manifesting as a complex epileptic syndrome, including partial seizures secondarily generalized and status epilepticus, who had in association, bilateral, asymmetrical (opercular and paracentral lobular) PMG. She had a 1-bp deletion (c.1862delC) in exon 12b of the NF1 gene. It is notable that, given the key role played by the NF1 gene product, neurofibromin, in normal brain development, and the relatively high frequency of other brain findings in NF1, there are not more NF1 cases with brain malformations manifesting as PMG.
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Affiliation(s)
- Martino Ruggieri
- Department of Formative Processes, University of Catania, Italy.
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Radio FC, Bernardini L, Loddo S, Bottillo I, Novelli A, Mingarelli R, Dallapiccola B. TBX2 gene duplication associated with complex heart defect and skeletal malformations. Am J Med Genet A 2010; 152A:2061-6. [PMID: 20635360 DOI: 10.1002/ajmg.a.33506] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report on a patient with mild mental retardation, prenatal onset growth retardation, cerebellar hypoplasia, and complex heart defect including: interventricular septal defect, patent foramen ovale, aortic coarctation, tricuspid valve insufficiency, mitral valve stenosis, and minor skeletal anomalies with hypo-aplasia of the distal phalanges. A SNP-array analysis detected a de novo duplication of 17q23.2, encompassing the TBX2 gene. Animal models argue for a key role of Tbx2 during cardiac and limb development. Accordingly, we hypothesize that the heart malformation and mild digital anomalies found in this patient could be related to TBX2 gene overexpression, suggesting parallel consequences of TBX2 gene dosage imbalances in animals and in humans.
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Affiliation(s)
- Francesca Clementina Radio
- Casa Sollievo della Sofferenza Hospital, IRCSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
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Bottillo I, Torrente I, Lanari V, Pinna V, Giustini S, Divona L, De Luca A, Dallapiccola B. Germline mosaicism in neurofibromatosis type 1 due to a paternally derived multi-exon deletion. Am J Med Genet A 2010; 152A:1467-73. [PMID: 20503322 DOI: 10.1002/ajmg.a.33386] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We report on the clinical and molecular features of a family in which neurofibromatosis type 1 (NF1) occurred in two of three siblings born to unaffected parents and in one granddaughter. Linkage analysis showed that the two affected siblings and the daughter of one of them shared the same paternal allele, whereas they had inherited different maternal alleles. We detected a disease-causing deletion (c.4773-3622-?_5749+?del) encompassing three NF1 gene exons in affected individuals. This mutation occurred on the paternally derived allele, arguing for a germline mosaicism in the probands' father. Real-time PCR showed that the mutation was present in about 10-17% of the paternal sperms. Current results confirm that germline mosaicism can explain the recurrence of NF1 in offspring of unaffected parents.
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Affiliation(s)
- Irene Bottillo
- IRCCS, Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo, Italy
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Brancati F, Fortugno P, Bottillo I, Lopez M, Josselin E, Boudghene-Stambouli O, Agolini E, Bernardini L, Bellacchio E, Iannicelli M, Rossi A, Dib-Lachachi A, Stuppia L, Palka G, Mundlos S, Stricker S, Kornak U, Zambruno G, Dallapiccola B. Mutations in PVRL4, encoding cell adhesion molecule nectin-4, cause ectodermal dysplasia-syndactyly syndrome. Am J Hum Genet 2010; 87:265-73. [PMID: 20691405 PMCID: PMC2917716 DOI: 10.1016/j.ajhg.2010.07.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2010] [Revised: 06/28/2010] [Accepted: 07/08/2010] [Indexed: 11/20/2022] Open
Abstract
Ectodermal dysplasias form a large disease family with more than 200 members. The combination of hair and tooth abnormalities, alopecia, and cutaneous syndactyly is characteristic of ectodermal dysplasia-syndactyly syndrome (EDSS). We used a homozygosity mapping approach to map the EDSS locus to 1q23 in a consanguineous Algerian family. By candidate gene analysis, we identified a homozygous mutation in the PVRL4 gene that not only evoked an amino acid change but also led to exon skipping. In an Italian family with two siblings affected by EDSS, we further detected a missense and a frameshift mutation. PVRL4 encodes for nectin-4, a cell adhesion molecule mainly implicated in the formation of cadherin-based adherens junctions. We demonstrated high nectin-4 expression in hair follicle structures, as well as in the separating digits of murine embryos, the tissues mainly affected by the EDSS phenotype. In patient keratinocytes, mutated nectin-4 lost its capability to bind nectin-1. Additionally, in discrete structures of the hair follicle, we found alterations of the membrane localization of nectin-afadin and cadherin-catenin complexes, which are essential for adherens junction formation, and we found reorganization of actin cytoskeleton. Together with cleft lip and/or palate ectodermal dysplasia (CLPED1, or Zlotogora-Ogur syndrome) due to an impaired function of nectin-1, EDSS is the second known "nectinopathy" caused by mutations in a nectin adhesion molecule.
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Affiliation(s)
- Francesco Brancati
- Department of Biomedical Sciences, Gabriele d'Annunzio University, Chieti, Italy.
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Luigetti M, Pizzuti A, Bartoletti S, Houlden H, Pirro C, Bottillo I, Madia F, Conte A, Tonali P, Sabatelli M. Triple A syndrome: A novel compound heterozygous mutation in the AAAS gene in an Italian patient without adrenal insufficiency. J Neurol Sci 2010; 290:150-2. [DOI: 10.1016/j.jns.2009.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Revised: 12/03/2009] [Accepted: 12/04/2009] [Indexed: 12/21/2022]
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Sinibaldi L, Harifi G, Bottillo I, Iannicelli M, El Hassani S, Brancati F, Dallapiccola B. A novel homozygous splice site mutation in the HPGD gene causes mild primary hypertrophic osteoarthropathy. Clin Exp Rheumatol 2010; 28:153-157. [PMID: 20406614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2009] [Accepted: 10/14/2009] [Indexed: 05/29/2023]
Abstract
OBJECTIVES Homozygous mutations in HPGD gene, encoding 15-hydroxyprostaglandin dehydrogenase, have recently been associated with primary hypertrophic osteoarthropathy (PHO). So far, only 7 HPGD alterations are known. In order to expand this mutational spectrum and better delineate the HPGD-related phenotype, we report the clinical and molecular characterisation of a 13-year-old boy and compare his features to known mutated patients. METHODS The HPGD gene exons 1-7 and exon-intron junctions were analysed by direct sequencing. Previously published HPGD-mutated patients were systematically reviewed based on the original clinical description. RESULTS A novel homozygous c.217+1G>A mutation affecting the obligatory donor splice site of HPGD exon 2 was identified in our proband who showed a mild form of PHO. Review of HPGD-mutated patients outlined all patients manifested digital clubbing, periostosis and acro-osteolysis. Hyperhidrosis (92%), arthralgia (65%) and eczema (33%) were variably associated features. Pachydermia (54%) was mild and mostly limited to palms and sole; cutis vertigis gyrata, blepharoptosis and severe skin thickening were never observed. Besides digital clubbing, PHO infants often presented patent ductus arteriosus (PDA) (32%) and delayed cranial sutures closure (55%). CONCLUSIONS The present findings broaden the allelic spectrum of HPGD gene to include a novel c.217+1G>A mutation. Mutated patients display a homogeneous phenotype mainly consisting in digital clubbing, periostosis, acro-osteolysis, hyperhidrosis and mild pachydermia. Earliest manifestations include delayed closure of the cranial sutures and PDA. In conclusion, the information reported herein would facilitate the diagnosis of PHO due to HPGD mutations.
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Affiliation(s)
- L Sinibaldi
- CSS-Mendel Institute, Casa Sollievo della Sofferenza Hospital, Rome, Italy
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Bottillo I, Ahlquist T, Brekke H, Danielsen SA, van den Berg E, Mertens F, Lothe RA, Dallapiccola B. Germline and somaticNF1mutations in sporadic and NF1-associated malignant peripheral nerve sheath tumours. J Pathol 2009; 217:693-701. [DOI: 10.1002/path.2494] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Carbone A, Bernardini L, Valenzano F, Bottillo I, De Simone C, Capizzi R, Capalbo A, Romano F, Novelli A, Dallapiccola B, Amerio P. Array-based comparative genomic hybridization in early-stage mycosis fungoides: recurrent deletion of tumor suppressor genes BCL7A, SMAC/DIABLO, and RHOF. Genes Chromosomes Cancer 2008; 47:1067-75. [PMID: 18663754 DOI: 10.1002/gcc.20601] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The etiology of mycosis fungoides (MF), the most frequent form of cutaneous T cell lymphoma (CTCL), is poorly understood. No specific genetic aberration has been detected, especially in early-stage disease, possibly due to the clinical and histological heterogeneity of patient series and to the different sources of malignant cells (skin, blood, or lymph node) included in most studies. Frozen skin biopsies from 16 patients with early-stage MF were studied using array-based comparative genomic hybridization. A DNA pool from healthy donors was used as the reference. Results demonstrated recurrent loss of 19, 7p22.1-p22.3, 7q11.1-q11.23, 9q34.12, 12q24.31, and 16q22.3-q23.1, and gain of 8q22.3-q23.1 and 21q22.12. The 12q24.31 region was recurrently deleted in 7/16 patients. Real-time PCR investigation for deletion of genes BCL7A, SMAC/DIABLO, and RHOF-three tumor suppressor genes with a putative role in hematological malignancies-demonstrated that they were deleted in 9, 10, and 13 cases, respectively. The identified genomic alterations and individual genes could yield important insights into the early steps of MF pathogenesis.
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Affiliation(s)
- Angelo Carbone
- Department of Dermatology, Catholic University of the Sacred Heart, Rome, Italy.
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De Luca A, Bottillo I, Dasdia MC, Morella A, Lanari V, Bernardini L, Divona L, Giustini S, Sinibaldi L, Novelli A, Torrente I, Schirinzi A, Dallapiccola B. Deletions of NF1 gene and exons detected by multiplex ligation-dependent probe amplification. J Med Genet 2007; 44:800-8. [PMID: 18055911 PMCID: PMC2652822 DOI: 10.1136/jmg.2007.053785] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2007] [Revised: 08/10/2007] [Accepted: 08/13/2007] [Indexed: 11/04/2022]
Abstract
To estimate the contribution of single and multi-exon NF1 gene copy-number changes to the NF1 mutation spectrum, we analysed a series of 201 Italian patients with neurofibromatosis type 1 (NF1). Of these, 138 had previously been found, using denaturing high-performance liquid chromatography or protein truncation test, to be heterozygous for intragenic NF1 point mutations/deletions/insertions, and were excluded from this analysis. The remaining 63 patients were analysed using multiplex ligation-dependent probe amplification (MLPA), which allows detection of deletions or duplications encompassing >or=1 NF1 exons, as well as entire gene deletions. MLPA results were validated using real-time quantitative PCR (qPCR) or fluorescent in situ hybridisation. MLPA screening followed by real-time qPCR detected a total of 23 deletions. Of these deletions, six were single exon, eight were multi-exon, and nine were of the entire NF1 gene. In our series, deletions encompassing >or=1 NF1 exons accounted for approximately 7% (14/201) of the NF1 gene mutation spectrum, suggesting that screening for these should now be systematically included in genetic testing of patients with NF1.
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Affiliation(s)
- A De Luca
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
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Bottillo I, De Luca A, Schirinzi A, Guida V, Torrente I, Calvieri S, Gervasini C, Larizza L, Pizzuti A, Dallapiccola B. Functional analysis of splicing mutations in exon 7 of NF1 gene. BMC Med Genet 2007; 8:4. [PMID: 17295913 PMCID: PMC1802069 DOI: 10.1186/1471-2350-8-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2006] [Accepted: 02/12/2007] [Indexed: 11/29/2022]
Abstract
Background Neurofibromatosis type 1 is one of the most common autosomal dominant disorders, affecting about 1:3,500 individuals. NF1 exon 7 displays weakly defined exon-intron boundaries, and is particularly prone to missplicing. Methods In this study we investigated the expression of exon 7 transcripts using bioinformatic identification of splicing regulatory sequences, and functional minigene analysis of four sequence changes [c.910C>T (R304X), c.945G>A/c.946C>A (Q315Q/L316M), c.1005T>C (N335N)] identified in exon 7 of three different NF1 patients. Results Our results detected the presence of three exonic splicing enhancers (ESEs) and one putative exonic splicing silencer (ESS) element. The wild type minigene assay resulted in three alternative isoforms, including a transcript lacking NF1 exon 7 (NF1ΔE7). Both the wild type and the mutated constructs shared NF1ΔE7 in addition to the complete messenger, but displayed a different ratio between the two transcripts. In the presence of R304X and Q315Q/L316M mutations, the relative proportion between the different isoforms is shifted toward the expression of NF1ΔE7, while in the presence of N335N variant, the NF1ΔE7 expression is abolished. Conclusion In conclusion, it appears mandatory to investigate the role of each nucleotide change within the NF1 coding sequence, since a significant proportion of NF1 exon 7 mutations affects pre-mRNA splicing, by disrupting exonic splicing motifs and modifying the delicate balance between aberrantly and correctly spliced transcripts.
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Affiliation(s)
- Irene Bottillo
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
- Department of Experimental Medicine and Pathology, University of Rome "La Sapienza", Rome, Italy
| | - Alessandro De Luca
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
- Department of Experimental Medicine and Pathology, University of Rome "La Sapienza", Rome, Italy
| | - Annalisa Schirinzi
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
- Department of Experimental Medicine and Pathology, University of Rome "La Sapienza", Rome, Italy
| | - Valentina Guida
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
| | - Isabella Torrente
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
| | - Stefano Calvieri
- Department of Dermatology-Venereology and Plastic and Reconstructive Surgery, University of Rome "La Sapienza", Rome, Italy
| | - Cristina Gervasini
- Division of Medical Genetics, San Paolo School of Medicine, University of Milan, Milan, Italy
| | - Lidia Larizza
- Division of Medical Genetics, San Paolo School of Medicine, University of Milan, Milan, Italy
| | - Antonio Pizzuti
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
- Department of Experimental Medicine and Pathology, University of Rome "La Sapienza", Rome, Italy
| | - Bruno Dallapiccola
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy
- Department of Experimental Medicine and Pathology, University of Rome "La Sapienza", Rome, Italy
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Bernardini L, Palka C, Ceccarini C, Capalbo A, Bottillo I, Mingarelli R, Novelli A, Dallapiccola B. Complex rearrangement of chromosomes 7q21.13-q22.1 confirms the ectrodactyly-deafness locus and suggests new candidate genes. Am J Med Genet A 2007; 146A:238-44. [DOI: 10.1002/ajmg.a.32093] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Sarkozy A, Schirinzi A, Lepri F, Bottillo I, De Luca A, Pizzuti A, Tartaglia M, Digilio MC, Dallapiccola B. Clinical lumping and molecular splitting of LEOPARD and NF1/NF1-Noonan syndromes. Am J Med Genet A 2007; 143A:1009-11. [PMID: 17366582 DOI: 10.1002/ajmg.a.31666] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Anna Sarkozy
- IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Rome, Italy.
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