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Zanchetta ME, Barozzi S, Isidori F, Marconi C, Farinasso L, Bottega R, Savoia A, Pecci A, Faleschini M. ACTN1-related thrombocytopenia: Homozygosity for an ACTN1 variant results in a more severe phenotype. Br J Haematol 2024. [PMID: 38594875 DOI: 10.1111/bjh.19457] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 03/20/2024] [Accepted: 03/31/2024] [Indexed: 04/11/2024]
Abstract
ACTN1-related thrombocytopenia is a rare disorder caused by heterozygous variants in the ACTN1 gene characterized by macrothrombocytopenia and mild bleeding tendency. We describe for the first time two patients affected with ACTN1-RT caused by a homozygous variant in ACTN1 (c.982G>A) with mild heart valve defects unexplained by any other genetic variants investigated by WES. Within the reported family, the homozygous sisters have moderate thrombocytopenia and marked platelet macrocytosis with giant platelets, revealing a more severe haematological phenotype compared to their heterozygous relatives and highlighting a significant effect of allelic burden on platelet size. Moreover, we hypothesize that some ACTN1 variants, especially when present in the homozygous state, may also contribute to the cardiac abnormalities.
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Affiliation(s)
| | - Serena Barozzi
- Medical Department, IRCCS Policlinico San Matteo Foundation, Pavia, Italy
| | - Federica Isidori
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Caterina Marconi
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Loredana Farinasso
- Regina Margherita Children Hospital and University of Turin, Turin, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - Anna Savoia
- Department of Engineering for Innovation Medicine, University of Verona, Verona, Italy
| | - Alessandro Pecci
- Medical Department, IRCCS Policlinico San Matteo Foundation, Pavia, Italy
- Department of Internal Medicine, University of Pavia, Pavia, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
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2
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Ammeti D, Marzollo A, Gabelli M, Zanchetta ME, Tretti-Parenzan C, Bottega R, Capaci V, Biffi A, Savoia A, Bresolin S, Faleschini M. A novel mutation in MECOM affects MPL regulation in vitro and results in thrombocytopenia and bone marrow failure. Br J Haematol 2023; 203:852-859. [PMID: 37610030 DOI: 10.1111/bjh.19023] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/21/2023] [Accepted: 07/21/2023] [Indexed: 08/24/2023]
Abstract
MECOM-associated syndrome (MECOM-AS) is a rare disease characterized by amegakaryocytic thrombocytopenia, progressive bone marrow failure, pancytopenia and radioulnar synostosis with high penetrance. The clinical phenotype may also include finger malformations, cardiac and renal alterations, hearing loss, B-cell deficiency and predisposition to infections. The syndrome, usually diagnosed in the neonatal period because of severe thrombocytopenia, is caused by mutations in the MECOM gene, encoding for the transcription factor EVI1. The mechanism linking the alteration of EVI1 function and thrombocytopenia is poorly understood. In a paediatric patient affected by severe thrombocytopenia, we identified a novel variant of the MECOM gene (p.P634L), whose effect was tested on pAP-1 enhancer element and promoters of targeted genes showing that the mutation impairs the repressive activity of the transcription factor. Moreover, we demonstrated that EVI1 controls the transcriptional regulation of MPL, a gene whose mutations are responsible for congenital amegakaryocytic thrombocytopenia (CAMT), potentially explaining the partial overlap between MECOM-AS and CAMT.
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Affiliation(s)
- Daniele Ammeti
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - Antonio Marzollo
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Padua, Italy
| | - Maria Gabelli
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Padua, Italy
- Maternal and Child Health Department, Padua University, Padua, Italy
| | | | - Caterina Tretti-Parenzan
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Padua, Italy
- Maternal and Child Health Department, Padua University, Padua, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - Valeria Capaci
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - Alessandra Biffi
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Padua, Italy
- Maternal and Child Health Department, Padua University, Padua, Italy
| | - Anna Savoia
- Department of Engineering for Innovation Medicine, University of Verona, Verona, Italy
| | - Silvia Bresolin
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Padua, Italy
- Maternal and Child Health Department, Padua University, Padua, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
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3
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Persico I, Fiscarelli I, Pelle A, Faleschini M, Pasini B, Savoia A, Bottega R. Phenotype reversion as "natural gene therapy" in Fanconi anemia by a gene conversion event. Front Genet 2023; 14:1240758. [PMID: 37790699 PMCID: PMC10544911 DOI: 10.3389/fgene.2023.1240758] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/08/2023] [Indexed: 10/05/2023] Open
Abstract
Somatic mosaicism appears as a recurrent phenomenon among patients suffering from Fanconi anemia (FA), but its direct prognostic significance mostly remains an open question. The clinical picture of FA mosaic subjects could indeed vary from just mild features to severe hematologic failure. Here, we illustrate the case of a proband whose FA familiarity, modest signs (absence of hematological anomalies and fertility issues), and chromosome fragility test transition to negative overtime were suggestive of somatic mosaicism. In line with this hypothesis, genetic testing on patient's peripheral blood and buccal swab reported the presence of the only FANCA paternal variant (FANCA:c.2638C>T, p. Arg880*) and of both parental alleles (the additional FANCA:c.3164G>A, p. Arg1055Gln), respectively. Moreover, the SNP analysis performed on the same biological specimens allowed us to attribute the proband's mosaicism status to a possible gene conversion mechanism. Our case clearly depicts the positive association between somatic mosaicism and the proband's favorable clinical course due to the occurrence of the reversion event at the hematopoietic stem cell level. Since this condition concerns only a limited subgroup of FA individuals, the accurate evaluation of the origin and extent of clonality would be key to steer clinicians toward the most appropriate therapeutic decision for their FA mosaic patients.
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Affiliation(s)
- Ilaria Persico
- Genomic Instability DNA Repair Syndromes Group, Joint Research Unit in Genomic Medicine UAB-IR Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Ilaria Fiscarelli
- Dipartimento di Scienze Mediche, Università degli Studi di Torino, Torino, Italy
- SC Genetica Medica U, AOU Città della Salute e della Scienza di Torino, Torino, Italy
| | - Alessandra Pelle
- SC Genetica Medica U, AOU Città della Salute e della Scienza di Torino, Torino, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Barbara Pasini
- Dipartimento di Scienze Mediche, Università degli Studi di Torino, Torino, Italy
- SC Genetica Medica U, AOU Città della Salute e della Scienza di Torino, Torino, Italy
| | - Anna Savoia
- Department of Engineering for Innovation Medicine, University of Verona, Verona, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, Trieste, Italy
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4
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Persico I, Fontana G, Faleschini M, Zanchetta ME, Ammeti D, Cappelli E, Corsolini F, Mosa C, Guarina A, Bogliolo M, Surrallés J, Dufour C, Farruggia P, Savoia A, Bottega R. A self-repair history: compensatory effect of a de novo variant on the FANCA c.2778+83C>G splicing mutation. Front Genet 2023; 14:1209138. [PMID: 37547463 PMCID: PMC10397729 DOI: 10.3389/fgene.2023.1209138] [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: 04/20/2023] [Accepted: 07/05/2023] [Indexed: 08/08/2023] Open
Abstract
Introduction: Fanconi anemia (FA) is a genome instability condition that drives somatic mosaicism in up to 25% of all patients, a phenomenon now acknowledged as a good prognostic factor. Herein, we describe the case of P1, a FA proband carrying a splicing variant, molecularly compensated by a de novo insertion. Methods and Results: Targeted next-generation sequencing on P1's peripheral blood DNA detected the known FANCA c.2778 + 83C > G intronic mutation and suggested the presence of a large deletion on the other allele, which was then assessed by MLPA and RT-PCR. To determine the c.2778 + 83C > G splicing effect, we performed a RT-PCR on P1's lymphoblastoid cell line (LCL) and on the LCL of another patient (P2) carrying the same variant. Although we confirmed the expected alternative spliced form with a partial intronic retention in P2, we detected no aberrant products in P1's sample. Sequencing of P1's LCL DNA allowed identification of the de novo c.2778 + 86insT variant, predicted to compensate 2778 + 83C > G impact. Albeit not found in P1's bone marrow (BM) DNA, c.2778 + 86insT was detected in a second P1's LCL established afterward, suggesting its occurrence at a low level in vivo. Minigene assay recapitulated the c.2778 + 83C > G effect on splicing and the compensatory role of c.2778 + 86insT in re-establishing the physiological mechanism. Accordingly, P1's LCL under mitomycin C selection preserved the FA pathway activity in terms of FANCD2 monoubiquitination and cell survival. Discussion: Our findings prove the role of c.2778 + 86insT as a second-site variant capable of rescuing c.2778 + 83C > G pathogenicity in vitro, which might contribute to a slow hematopoietic deterioration and a mild hematologic evolution.
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Affiliation(s)
- Ilaria Persico
- Department of Medical Sciences, University of Trieste, Trieste, Italy
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain
- Genomic Instability DNA Repair Syndromes Group, Joint Research Unit in Genomic Medicine UAB-IR Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Giorgia Fontana
- Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, Trieste, Italy
| | | | - Daniele Ammeti
- Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Enrico Cappelli
- Hematology Unit, IRCCS Istituto “G. Gaslini”—Genoa, Genova, Italy
| | - Fabio Corsolini
- LABSIEM—Laboratory for the Study of Inborn Errors of Metabolism—Pediatric Clinic and Endocrinology—IRCCS Istituto “G. Gaslini”—Genoa, Genova, Italy
| | - Clara Mosa
- Pediatric Onco-Hematology, ARNAS Civico Hospital, Palermo, Italy
| | - Angela Guarina
- Pediatric Onco-Hematology, ARNAS Civico Hospital, Palermo, Italy
| | - Massimo Bogliolo
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain
- Genomic Instability DNA Repair Syndromes Group, Joint Research Unit in Genomic Medicine UAB-IR Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Jordi Surrallés
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona, Spain
- Genomic Instability DNA Repair Syndromes Group, Joint Research Unit in Genomic Medicine UAB-IR Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Carlos III Health Institute, Madrid, Spain
| | - Carlo Dufour
- Hematology Unit, IRCCS Istituto “G. Gaslini”—Genoa, Genova, Italy
| | - Piero Farruggia
- Pediatric Onco-Hematology, ARNAS Civico Hospital, Palermo, Italy
| | - Anna Savoia
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health—IRCCS “Burlo Garofolo”, Trieste, Italy
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5
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Marconi C, Pecci A, Palombo F, Melazzini F, Bottega R, Nardi E, Bozzi V, Faleschini M, Barozzi S, Giangregorio T, Magini P, Balduini CL, Savoia A, Seri M, Noris P, Pippucci T. Exome sequencing in 116 patients with inherited thrombocytopenia that remained of unknown origin after systematic phenotype-driven diagnostic workup. Haematologica 2023; 108:1909-1919. [PMID: 36519321 PMCID: PMC10316235 DOI: 10.3324/haematol.2022.280993] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 03/04/2022] [Accepted: 08/29/2022] [Indexed: 11/01/2023] Open
Abstract
Inherited thrombocytopenias (IT) are genetic diseases characterized by low platelet count, sometimes associated with congenital defects or a predisposition to develop additional conditions. Next-generation sequencing has substantially improved our knowledge of IT, with more than 40 genes identified so far, but obtaining a molecular diagnosis remains a challenge especially for patients with non-syndromic forms, having no clinical or functional phenotypes that raise suspicion about specific genes. We performed exome sequencing (ES) in a cohort of 116 IT patients (89 families), still undiagnosed after a previously validated phenotype-driven diagnostic algorithm including a targeted analysis of suspected genes. ES achieved a diagnostic yield of 36%, with a gain of 16% over the diagnostic algorithm. This can be explained by genetic heterogeneity and unspecific genotype-phenotype relationships that make the simultaneous analysis of all the genes, enabled by ES, the most reasonable strategy. Furthermore, ES disentangled situations that had been puzzling because of atypical inheritance, sex-related effects or false negative laboratory results. Finally, ES-based copy number variant analysis disclosed an unexpectedly high prevalence of RUNX1 deletions, predisposing to hematologic malignancies. Our findings demonstrate that ES, including copy number variant analysis, can substantially contribute to the diagnosis of IT and can solve diagnostic problems that would otherwise remain a challenge.
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Affiliation(s)
- Caterina Marconi
- Department of Medical and Surgical Science, University of Bologna, Bologna
| | - Alessandro Pecci
- Department of Internal Medicine, University of Pavia, Pavia, Italy; Medicina Generale 1, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Flavia Palombo
- Department of Medical and Surgical Science, University of Bologna, Bologna
| | - Federica Melazzini
- Department of Internal Medicine, University of Pavia, Pavia, Italy; Medicina Generale 1, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Roberta Bottega
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Elena Nardi
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna
| | - Valeria Bozzi
- Medicina Generale 1, IRCCS Policlinico San Matteo Foundation, Pavia
| | | | - Serena Barozzi
- Medicina Generale 1, IRCCS Policlinico San Matteo Foundation, Pavia
| | | | - Pamela Magini
- Medical Genetics Unit, IRCCS Azienda Ospedaliero Universitaria di Bologna, Policlinico di Sant'Orsola, Bologna
| | | | - Anna Savoia
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy; Department of Medical Sciences, University of Trieste, Trieste
| | - Marco Seri
- Department of Medical and Surgical Science, University of Bologna, Bologna, Italy; Medical Genetics Unit, IRCCS Azienda Ospedaliero Universitaria di Bologna, Policlinico di Sant'Orsola, Bologna.
| | - Patrizia Noris
- Department of Internal Medicine, University of Pavia, Pavia, Italy; Medicina Generale 1, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Tommaso Pippucci
- Medical Genetics Unit, IRCCS Azienda Ospedaliero Universitaria di Bologna, Policlinico di Sant'Orsola, Bologna
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6
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Persico I, Feresin A, Faleschini M, Fontana G, Sirchia F, Faletra F, La Bianca M, Suergiu S, Morgutti M, Maschio M, D'Adamo AP, Raraigh KS, Savoia A, Bottega R. Things come in threes: A new complex allele and a novel deletion within the CFTR gene complicate an accurate diagnosis of cystic fibrosis. Mol Genet Genomic Med 2022; 10:e1926. [PMID: 35348309 PMCID: PMC9184661 DOI: 10.1002/mgg3.1926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 06/07/2021] [Revised: 02/16/2022] [Accepted: 03/08/2022] [Indexed: 11/07/2022] Open
Abstract
Background Despite consolidated guidelines, the clinical diagnosis and prognosis of cystic fibrosis (CF) is still challenging mainly because of the extensive phenotypic heterogeneity and the high number of CFTR variants, including their combinations as complex alleles. Results We report a family with a complicated syndromic phenotype, which led to the suspicion not only of CF, but of a dominantly inherited skeletal dysplasia (SD). Whereas the molecular basis of the SD was not clarified, segregation analysis was central to make a correct molecular diagnosis of CF, as it allowed to identify three CFTR variants encompassing two known maternal mutations and a novel paternal microdeletion. Conclusion This case well illustrates possible pitfalls in the clinical and molecular diagnosis of CF; presence of complex phenotypes deflecting clinicians from appropriate CF recognition, and/or identification of two mutations assumed to be in trans but with an unconfirmed status, which underline the importance of an in‐depth molecular CFTR analysis.
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Affiliation(s)
- Ilaria Persico
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Agnese Feresin
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Giorgia Fontana
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Fabio Sirchia
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Flavio Faletra
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Martina La Bianca
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Sarah Suergiu
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Marcello Morgutti
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Massimo Maschio
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Adamo Pio D'Adamo
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Karen S Raraigh
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anna Savoia
- Department of Medical Sciences, University of Trieste, Trieste, Italy.,Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
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7
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Faleschini M, Ammeti D, Papa N, Alfano C, Bottega R, Fontana G, Capaci V, Zanchetta ME, Pozzani F, Montanari F, Petroni V, Giordano P, Noris P, Giona F, Savoia A. ETV6-related thrombocytopenia: dominant negative effect of mutations as common pathogenic mechanism. Haematologica 2022; 107:2249-2254. [PMID: 35586967 PMCID: PMC9425326 DOI: 10.3324/haematol.2022.280729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Indexed: 11/16/2022] Open
Affiliation(s)
| | - Daniele Ammeti
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Nicole Papa
- Department of Medical Sciences, University of Trieste, Trieste
| | - Caterina Alfano
- Structural Biology and Biophysics Unit, Fondazione Ri.MED, Palermo
| | - Roberta Bottega
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Giorgia Fontana
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Valeria Capaci
- Department of Medical Sciences, University of Trieste, Trieste
| | | | | | | | - Valeria Petroni
- SOSD Pediatric Oncohematology, University Hospital "Ospedali Riuniti", Ancona
| | - Paola Giordano
- Interdisciplinary department of Medicine, Pediatric Unit, University "A.Moro" of Bari, Bari
| | - Patrizia Noris
- Department of Internal Medicine, IRCCS Policlinico San Matteo Foundation, University of Pavia, Pavia
| | - Fiorina Giona
- Department of Translational and Precision Medicine, Sapienza University of Rome, Rome
| | - Anna Savoia
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy; Department of Medical Sciences, University of Trieste, Trieste.
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8
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Bottega R, Marzollo A, Marinoni M, Athanasakis E, Persico I, Bianco AM, Faleschini M, Valencic E, Simoncini D, Rossini L, Corsolini F, La Bianca M, Robustelli G, Gabelli M, Agosti M, Biffi A, Grotto P, Bozzi V, Noris P, Burlina AB, Pio d'Adamo A, Tommasini A, Faletra F, Pastore A, Savoia A. GNE-related thrombocytopenia: evidence for a mutational hotspot in the ADP/substrate domain of the GNE bifunctional enzyme. Haematologica 2021; 107:750-754. [PMID: 34788986 PMCID: PMC8883527 DOI: 10.3324/haematol.2021.279689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Indexed: 11/09/2022] Open
Affiliation(s)
- Roberta Bottega
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Antonio Marzollo
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, 35128 Padua, Italy; Fondazione Città della Speranza, Istituto di Ricerca Pediatrica, Via Ricerca Scientifica, 4, 35127, Padua
| | | | | | - Ilaria Persico
- Department of Medical Sciences, University of Trieste, Trieste, Italy; Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Barcelona
| | | | | | - Erica Valencic
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | | | - Linda Rossini
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, 35128 Padua
| | - Fabio Corsolini
- LABSIEM - Laboratory for the Study of Inborn Errors of Metabolism, Pediatric Clinic and Endocrinology, Istituto Giannina Gaslini, Genova
| | - Martina La Bianca
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | | | - Maria Gabelli
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, 35128 Padua
| | - Massimo Agosti
- Maternal and Child Department, F. Del Ponte Hospital, Varese
| | - Alessandra Biffi
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, 35128 Padua
| | - Paolo Grotto
- Pediatric Department, Hospital of Treviso - Oderzo, Treviso
| | - Valeria Bozzi
- Biotechnology Research Laboratories, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Patrizia Noris
- Biotechnology Research Laboratories, IRCCS Policlinico San Matteo Foundation, Pavia, Italy; Department of Internal Medicine and Medical Therapy, University of Pavia, Pavia
| | - Alberto B Burlina
- Division of Inherited Metabolic Diseases, Regional Center for Expanded Neonatal Screening Department of Women and Children's Health, University Hospital of Padova, Padova
| | - Adamo Pio d'Adamo
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy; Department of Medical Sciences, University of Trieste, Trieste
| | - Alberto Tommasini
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy; Department of Medical Sciences, University of Trieste, Trieste
| | - Flavio Faletra
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Annalisa Pastore
- King's College London, Dept. of Clinical Neuroscience, Denmark Hill Campus, London, United Kingdom; European Synchrotron Radiation Facility 71, Grenoble
| | - Anna Savoia
- Istitute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy; Department of Medical Sciences, University of Trieste, Trieste.
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9
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Bottega R, Persico I, De Seta F, Romano F, Di Lorenzo G. Anti-inflammatory properties of a proprietary bromelain extract (Bromeyal™) after in vitro simulated gastrointestinal digestion. Int J Immunopathol Pharmacol 2021; 35:20587384211034686. [PMID: 34387509 PMCID: PMC8366142 DOI: 10.1177/20587384211034686] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Introduction Bromelain is a complex mixture of thiol proteases and other non-proteolytic constituents, commercially extracted primarily from the pineapple stem. Evidence from several in vitro and in vivo studies highlights its excellent bioavailability, lack of side effects, and broad spectrum of medical efficacies, of which the antiphlogistic properties are among the most valuable ones. Bromelain has indeed been employed for the efficient treatment of many inflammatory disorders, ranging from osteoarthritis and inflammatory bowel diseases to cancer-related inflammation. Methods The aim of the current study was to assess the anti-inflammatory effects of bromelain after gastrointestinal digestion simulated in vitro using stomach, intestinal, and chondrocyte human cellular models (AGS, Caco-2, and SW1353, respectively). Results We successfully demonstrated the capability of bromelain to reduce an inflammatory stimulus by reproducing its exposure to the gastro-enteric environment in vitro and assaying its effect in human cell lines derived from stomach, intestinal, and chondrocytes. Conclusion Consistently with the previously published data, our work underpins the relevance of bromelain in the development of safer and more effective anti-inflammatory therapies.
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Affiliation(s)
- Roberta Bottega
- Institute for Maternal and Child Health – IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Ilaria Persico
- Department of Medical Science, University of Trieste, Trieste, Italy
| | - Francesco De Seta
- Institute for Maternal and Child Health – IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Federico Romano
- Institute for Maternal and Child Health – IRCCS “Burlo Garofolo”, Trieste, Italy
- Federico Romano, Department of Obsterics and Gynaecology, IRCCS Burlo Garofolo, via Dell’Istria, 65/1, Trieste 34137, Italy.
| | - Giovanni Di Lorenzo
- Institute for Maternal and Child Health – IRCCS “Burlo Garofolo”, Trieste, Italy
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10
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Faleschini M, Papa N, Morel-Kopp MC, Marconi C, Giangregorio T, Melazzini F, Bozzi V, Seri M, Noris P, Pecci A, Savoia A, Bottega R. Dysregulation of oncogenic factors by GFI1B p32: investigation of a novel GFI1B germline mutation. Haematologica 2021; 107:260-267. [PMID: 33472357 PMCID: PMC8719102 DOI: 10.3324/haematol.2020.267328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/31/2020] [Indexed: 11/10/2022] Open
Abstract
GFI1B is a transcription factor essential for the regulation of erythropoiesis and megakaryopoiesis, and pathogenic variants have been associated with thrombocytopenia and bleeding. Analysing thrombocytopenic families by whole exome sequencing, we identified a novel GFI1B variant (c.648+5G>A), which causes exon 9 skipping and overexpression of a shorter p32 isoform. We report the clinical data of our patients and critically review the phenotype observed in individuals with different GFI1B variants leading to the same effect on the p32 expression. Since p32 is increased in acute and chronic leukemia cells, we tested the expression level of genes playing a role in various type of cancers, including hematological tumors and found that they are significantly dysregulated, suggesting a potential role for GFI1B in carcinogenesis regulation. Increasing the detection of individuals with GFI1B variants will allow us to better characterize this rare disease and determine whether it is associated with an increased risk of developing malignancies.
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Affiliation(s)
| | - Nicole Papa
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
| | - Marie-Christine Morel-Kopp
- Department of Haematology and Transfusion Medicine, Royal North Shore Hospital and Northern Blood Research Centre, Kolling Institute, University of Sydney, Sydney
| | - Caterina Marconi
- Department of Medical and Surgical Sciences, University of Bologna, Bologna
| | | | - Federica Melazzini
- Biotechnology Research Laboratories, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Valeria Bozzi
- Biotechnology Research Laboratories, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Marco Seri
- Department of Medical and Surgical Sciences, University of Bologna, Bologna
| | - Patrizia Noris
- Biotechnology Research Laboratories, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Alessandro Pecci
- Biotechnology Research Laboratories, IRCCS Policlinico San Matteo Foundation, Pavia
| | - Anna Savoia
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy; Department of Medical Sciences, University of Trieste, Trieste.
| | - Roberta Bottega
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste
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11
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Bottega R, Ravera S, Napolitano LMR, Chiappetta V, Zini N, Crescenzi B, Arniani S, Faleschini M, Cortone G, Faletra F, Medagli B, Sirchia F, Moretti M, de Lange J, Cappelli E, Mecucci C, Onesti S, Pisani FM, Savoia A. Genomic integrity and mitochondrial metabolism defects in Warsaw syndrome cells: a comparison with Fanconi anemia. J Cell Physiol 2021; 236:5664-5675. [PMID: 33432587 DOI: 10.1002/jcp.30265] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 12/14/2020] [Accepted: 12/16/2020] [Indexed: 12/25/2022]
Abstract
Warsaw breakage syndrome (WABS), is caused by biallelic mutations of DDX11, a gene coding a DNA helicase. We have recently reported two affected sisters, compound heterozygous for a missense (p.Leu836Pro) and a frameshift (p.Lys303Glufs*22) variant. By investigating the pathogenic mechanism, we demonstrate the inability of the DDX11 p.Leu836Pro mutant to unwind forked DNA substrates, while retaining DNA binding activity. We observed the accumulation of patient-derived cells at the G2/M phase and increased chromosomal fragmentation after mitomycin C treatment. The phenotype partially overlaps with features of the Fanconi anemia cells, which shows not only genomic instability but also defective mitochondria. This prompted us to examine mitochondrial functionality in WABS cells and revealed an altered aerobic metabolism. This opens the door to the further elucidation of the molecular and cellular basis of an impaired mitochondrial phenotype and sheds light on this fundamental process in cell physiology and the pathogenesis of these diseases.
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Affiliation(s)
- Roberta Bottega
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo, Trieste, Italy
| | - Silvia Ravera
- Department of Experimental Medicine, University of Genova, Genova, Italy
| | | | - Viviana Chiappetta
- Istituto di Biochimica e Biologia Cellulare (IBBC), Consiglio Nazionale delle Ricerche (CNR), Naples, Italy
| | - Nicoletta Zini
- CNR-National Research Council of Italy, Institute of Molecular Genetics "Luigi Luca Cavalli-Sforza"-Unit of Bologna, Bologna, Italy.,IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Barbara Crescenzi
- Sezione di Ematologia ed Immunologia Clinica, Centro Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Silvia Arniani
- Sezione di Ematologia ed Immunologia Clinica, Centro Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo, Trieste, Italy
| | - Giuseppe Cortone
- Structural Biology Laboratory, Elettra-Sincrotrone Trieste, Trieste, Italy.,International School for Advanced Studies (SISSA), Trieste, Italy
| | - Flavio Faletra
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo, Trieste, Italy
| | - Barbara Medagli
- Structural Biology Laboratory, Elettra-Sincrotrone Trieste, Trieste, Italy.,Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Fabio Sirchia
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo, Trieste, Italy
| | - Martina Moretti
- Sezione di Ematologia ed Immunologia Clinica, Centro Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Job de Lange
- Amsterdam UMC, Clinical Genetics, Section Oncogenetics, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Enrico Cappelli
- UO Ematologia, IRCCS Istituto Giannina Gaslini, Genova, Italy, Genova, Italy
| | - Cristina Mecucci
- Sezione di Ematologia ed Immunologia Clinica, Centro Ricerche Emato-Oncologiche, University of Perugia, Perugia, Italy
| | - Silvia Onesti
- Structural Biology Laboratory, Elettra-Sincrotrone Trieste, Trieste, Italy
| | - Francesca M Pisani
- Istituto di Biochimica e Biologia Cellulare (IBBC), Consiglio Nazionale delle Ricerche (CNR), Naples, Italy
| | - Anna Savoia
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo, Trieste, Italy.,Department of Medical Sciences, University of Trieste, Trieste, Italy
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12
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Bottega R, Napolitano LMR, Carbone A, Cappelli E, Corsolini F, Onesti S, Savoia A, Gasparini P, Faletra F. Two further patients with Warsaw breakage syndrome. Is a mild phenotype possible? Mol Genet Genomic Med 2019; 7:e639. [PMID: 30924321 PMCID: PMC6503064 DOI: 10.1002/mgg3.639] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 01/15/2019] [Accepted: 02/08/2019] [Indexed: 01/10/2023] Open
Abstract
Background Warsaw Breakage Syndrome (WABS) is an ultra rare cohesinopathy caused by biallelic mutation of DDX11 gene. It is clinically characterized by pre and postnatal growth delay, microcephaly, hearing loss with cochlear hypoplasia, skin color abnormalities, and dysmorphisms. Methods Mutational screening and functional analyses (protein expression and 3D‐modeling) were performed in order to investigate the presence and pathogenicity of DDX11 variant identified in our patients. Results We report the clinical history of two sisters affected by WABS with a pathological mytomicin C test carrying compound heterozygous mutations (c.2507T > C / c.907_920del) of the DDX11 gene. The pathogenicity of this variant was confirmed in the light of a bioinformatic study and protein three‐dimensional modeling, as well as expression analysis. Conclusion These findings further extend the clinical and molecular knowledge about the WABS showing a possible mild phenotype without major malformations or intellectual disability.
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Affiliation(s)
- Roberta Bottega
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Luisa M R Napolitano
- Structural Biology Laboratory, Elettra-Sincrotrone Trieste S.C.p.A., Trieste, Italy
| | - Anna Carbone
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Turin, Italy
| | - Enrico Cappelli
- Clinical and Experimental Hematology Unit, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Fabio Corsolini
- U.O.S.D. Centro di Diagnostica Genetica e Biochimica delle Malattie Metaboliche, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Silvia Onesti
- Structural Biology Laboratory, Elettra-Sincrotrone Trieste S.C.p.A., Trieste, Italy
| | - Anna Savoia
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy.,Department of Medical Science, University of Trieste, Trieste, Italy
| | - Paolo Gasparini
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy.,Department of Medical Science, University of Trieste, Trieste, Italy
| | - Flavio Faletra
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
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13
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Bottega R, Cappellani S, Fabretto A, Spinelli AM, Severini GM, Aloisio M, Faleschini M, Athanasakis E, Bruno I, Faletra F, Pecile V. Could a chimeric condition be responsible for unexpected genetic syndromes? The role of the single nucleotide polymorphism-array analysis. Mol Genet Genomic Med 2019; 7:e546. [PMID: 30628197 PMCID: PMC6418439 DOI: 10.1002/mgg3.546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 09/27/2018] [Revised: 12/04/2018] [Accepted: 12/05/2018] [Indexed: 11/06/2022] Open
Abstract
In this paper, is reported the identification of two chimeric patients, a rare finding if sexual abnormalities are absent. However, their chimeric condition is responsible at least for the Silver-Russell phenotype observed in one of the two patients. By single nucleotide polymorphism-array analyses, it was possible to clearly define the mechanism responsible for this unusual finding, underlining the importance of this technique in bringing out the perhaps submerged world of chimeras.
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Affiliation(s)
- Roberta Bottega
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Stefania Cappellani
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Antonella Fabretto
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | | | | | - Michelangelo Aloisio
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | | | - Irene Bruno
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Flavio Faletra
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Vanna Pecile
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
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14
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Faleschini M, Melazzini F, Marconi C, Giangregorio T, Pippucci T, Cigalini E, Pecci A, Bottega R, Ramenghi U, Siitonen T, Seri M, Pastore A, Savoia A, Noris P. ACTN1 mutations lead to a benign form of platelet macrocytosis not always associated with thrombocytopenia. Br J Haematol 2018; 183:276-288. [PMID: 30351444 DOI: 10.1111/bjh.15531] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 02/22/2018] [Accepted: 06/19/2018] [Indexed: 12/27/2022]
Abstract
The inherited thrombocytopenias (IT) are a heterogeneous group of diseases resulting from mutations in more than 30 different genes. Among them, ACTN1-related thrombocytopenia (ACTN1-RT; Online Mendelian Inheritance in Man: 615193) is one of the most recently identified forms. It has been described as a mild autosomal dominant macrothrombocytopenia caused by mutations in ACTN1, a gene encoding for one of the two non-muscle isoforms of α-actinin. We recently identified seven new unrelated families with ACTN1-RT caused by different mutations. Two of them are novel missense variants (p.Trp128Cys and p.Pro233Leu), whose pathogenic role has been confirmed by in vitro studies. Together with the 10 families we have previously described, our cohort of ACTN1-RT now consists of 49 individuals carrying ACTN1 mutations. This is the largest case series ever collected and enabled a critical evaluation of the clinical aspects of the disease. We concluded that ACTN1-RT is the fourth most frequent form of IT worldwide and it is characterized by platelet macrocytosis in all affected subjects and mild thrombocytopenia in less than 80% of cases. The risk of bleeding, either spontaneous or upon haemostatic challenge, is negligible and there are no other associated defects, either congenital or acquired. Therefore, ACTN1-RT is a benign form of IT, whose diagnosis provides affected individuals and their families with a good prognosis.
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Affiliation(s)
- Michela Faleschini
- Institute for Maternal and Child Health - "IRCCS Burlo Garofolo", Trieste, Italy
| | - Federica Melazzini
- Department of Internal Medicine, IRCCS Policlinico San Matteo Foundation and University of Pavia, Pavia, Italy
| | - Caterina Marconi
- Department of Medical Science, Medical Genetics Unit, Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | | | - Tommaso Pippucci
- Department of Medical Science, Medical Genetics Unit, Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Elena Cigalini
- Department of Internal Medicine, IRCCS Policlinico San Matteo Foundation and University of Pavia, Pavia, Italy
| | - Alessandro Pecci
- Department of Internal Medicine, IRCCS Policlinico San Matteo Foundation and University of Pavia, Pavia, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health - "IRCCS Burlo Garofolo", Trieste, Italy
| | - Ugo Ramenghi
- Pediatric Department, Hematology Unit, University of Torino, Torino, Italy
| | - Timo Siitonen
- Department of Medicine, Oulu University Hospital, Oulu, Finland
| | - Marco Seri
- Department of Medical Science, Medical Genetics Unit, Policlinico Sant'Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Annalisa Pastore
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Anna Savoia
- Institute for Maternal and Child Health - "IRCCS Burlo Garofolo", Trieste, Italy.,Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Patrizia Noris
- Department of Internal Medicine, IRCCS Policlinico San Matteo Foundation and University of Pavia, Pavia, Italy
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15
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Bottega R, Nicchia E, Cappelli E, Ravera S, De Rocco D, Faleschini M, Corsolini F, Pierri F, Calvillo M, Russo G, Casazza G, Ramenghi U, Farruggia P, Dufour C, Savoia A. Hypomorphic FANCA mutations correlate with mild mitochondrial and clinical phenotype in Fanconi anemia. Haematologica 2017; 103:417-426. [PMID: 29269525 PMCID: PMC5830397 DOI: 10.3324/haematol.2017.176131] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 12/14/2017] [Indexed: 11/16/2022] Open
Abstract
Fanconi anemia is a rare disease characterized by congenital malformations, aplastic anemia, and predisposition to cancer. Despite the consolidated role of the Fanconi anemia proteins in DNA repair, their involvement in mitochondrial function is emerging. The purpose of this work was to assess whether the mitochondrial phenotype, independent of genomic integrity, could correlate with patient phenotype. We evaluated mitochondrial and clinical features of 11 affected individuals homozygous or compound heterozygous for p.His913Pro and p.Arg951Gln/Trp, the two residues of FANCA that are more frequently affected in our cohort of patients. Although p.His913Pro and p.Arg951Gln proteins are stably expressed in cytoplasm, they are unable to migrate in the nucleus, preventing cells from repairing DNA. In these cells, the electron transfer between respiring complex I–III is reduced and the ATP/AMP ratio is impaired with defective ATP production and AMP accumulation. These activities are intermediate between those observed in wild-type and FANCA−/− cells, suggesting that the variants at residues His913 and Arg951 are hypomorphic mutations. Consistent with these findings, the clinical phenotype of most of the patients carrying these mutations is mild. These data further support the recent finding that the Fanconi anemia proteins play a role in mitochondria, and open up possibilities for genotype/phenotype studies based on novel mitochondrial criteria.
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Affiliation(s)
- Roberta Bottega
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Elena Nicchia
- Department of Medical Sciences, University of Trieste, Genoa, Italy
| | - Enrico Cappelli
- Clinical and Experimental Hematology Unit, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Silvia Ravera
- Department of Pharmacy (DIFAR), Biochemistry Lab, University of Genoa, Genoa, Italy
| | - Daniela De Rocco
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy
| | - Fabio Corsolini
- U.O.S.D. Centro di Diagnostica Genetica e Biochimica delle Malattie Metaboliche, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Filomena Pierri
- Clinical and Experimental Hematology Unit, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Michaela Calvillo
- Clinical and Experimental Hematology Unit, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Giovanna Russo
- Oncology Hematology Pediatric Unit, "Policlinico - Vittorio Emanuele", University of Catania, Pisa, Italy
| | - Gabriella Casazza
- Pediatric Onco-Hematology, Azienda Ospedaliera/Universitaria Pisana, Pisa, Italy
| | - Ugo Ramenghi
- Department of Pediatric and Public Health Sciences, University of Torino, Palermo, Italy
| | - Piero Farruggia
- Pediatric Onco-Hematology, ARNAS Civico Hospital, Palermo, Italy
| | - Carlo Dufour
- Clinical and Experimental Hematology Unit, "G. Gaslini" Children's Hospital, Genoa, Italy
| | - Anna Savoia
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", Trieste, Italy .,Department of Medical Sciences, University of Trieste, Genoa, Italy
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16
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De Rocco D, Melazzini F, Marconi C, Pecci A, Bottega R, Gnan C, Palombo F, Giordano P, Coccioli MS, Glembotsky AC, Heller PG, Seri M, Savoia A, Noris P. Mutations of RUNX1 in families with inherited thrombocytopenia. Am J Hematol 2017; 92:E86-E88. [PMID: 28240786 DOI: 10.1002/ajh.24703] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 02/22/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Daniela De Rocco
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo; Trieste Italy
| | - Federica Melazzini
- Department of Internal Medicine; IRCCS Policlinico San Matteo Foundation and University of Pavia; Pavia Italy
| | - Caterina Marconi
- Department of Medical and Surgical Science; Policlinico Sant'Orsola Malpighi and University of Bologna; Bologna Italy
| | - Alessandro Pecci
- Department of Internal Medicine; IRCCS Policlinico San Matteo Foundation and University of Pavia; Pavia Italy
| | - Roberta Bottega
- Department of Medical Sciences; University of Trieste; Trieste Italy
| | - Chiara Gnan
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo; Trieste Italy
| | - Flavia Palombo
- Department of Medical and Surgical Science; Policlinico Sant'Orsola Malpighi and University of Bologna; Bologna Italy
| | - Paola Giordano
- Department of Biomedical Science and Human Oncology; Clinical Pediatrics “B. Trambusti,” University of Bari; Bari Italy
| | | | - Ana C. Glembotsky
- IDIM-CONICET; Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires; Buenos Aires Argentina
| | - Paula G. Heller
- IDIM-CONICET; Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires; Buenos Aires Argentina
| | - Marco Seri
- Department of Medical and Surgical Science; Policlinico Sant'Orsola Malpighi and University of Bologna; Bologna Italy
| | - Anna Savoia
- Institute for Maternal and Child Health-IRCCS Burlo Garofolo; Trieste Italy
- Department of Medical Sciences; University of Trieste; Trieste Italy
| | - Patrizia Noris
- Department of Internal Medicine; IRCCS Policlinico San Matteo Foundation and University of Pavia; Pavia Italy
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17
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Bottega R, Nicchia E, Alfano C, Glembotsky AC, Pastore A, Bertaggia-Calderara D, Bisig B, Duchosal MA, Arbesú G, Alberio L, Heller PG, Savoia A. Gray platelet syndrome: Novel mutations of the NBEAL2 gene. Am J Hematol 2017; 92:E20-E22. [PMID: 27870194 DOI: 10.1002/ajh.24610] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 11/17/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Roberta Bottega
- Department of Medical Sciences; University of Trieste; Italy
| | - Elena Nicchia
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo; Trieste Italy
| | | | - Ana C. Glembotsky
- Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires, CONICET; Buenos Aires Argentina
| | | | | | - Bettina Bisig
- Institute of Pathology, CHUV University Hospital and University of Lausanne; Switzerland
| | - Michel A. Duchosal
- Service and Central Laboratory of Hematology; University Hospital of Lausanne (CHUV); Switzerland
| | | | - Lorenzo Alberio
- Service and Central Laboratory of Hematology; University Hospital of Lausanne (CHUV); Switzerland
| | - Paula G. Heller
- Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires, CONICET; Buenos Aires Argentina
| | - Anna Savoia
- Department of Medical Sciences; University of Trieste; Italy
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo; Trieste Italy
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18
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Ravera S, Dufour C, Cesaro S, Bottega R, Faleschini M, Cuccarolo P, Corsolini F, Usai C, Columbaro M, Cipolli M, Savoia A, Degan P, Cappelli E. Evaluation of energy metabolism and calcium homeostasis in cells affected by Shwachman-Diamond syndrome. Sci Rep 2016; 6:25441. [PMID: 27146429 PMCID: PMC4857091 DOI: 10.1038/srep25441] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 04/12/2016] [Indexed: 02/07/2023] Open
Abstract
Isomorphic mutation of the SBDS gene causes Shwachman-Diamond syndrome (SDS). SDS is a rare genetic bone marrow failure and cancer predisposition syndrome. SDS cells have ribosome biogenesis and their protein synthesis altered, which are two high-energy consuming cellular processes. The reported changes in reactive oxygen species production, endoplasmic reticulum stress response and reduced mitochondrial functionality suggest an energy production defect in SDS cells. In our work, we have demonstrated that SDS cells display a Complex IV activity impairment, which causes an oxidative phosphorylation metabolism defect, with a consequent decrease in ATP production. These data were confirmed by an increased glycolytic rate, which compensated for the energetic stress. Moreover, the signalling pathways involved in glycolysis activation also appeared more activated; i.e. we reported AMP-activated protein kinase hyper-phosphorylation. Notably, we also observed an increase in a mammalian target of rapamycin phosphorylation and high intracellular calcium concentration levels ([Ca(2+)]i), which probably represent new biochemical equilibrium modulation in SDS cells. Finally, the SDS cell response to leucine (Leu) was investigated, suggesting its possible use as a therapeutic adjuvant to be tested in clinical trials.
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Affiliation(s)
- Silvia Ravera
- DIFAR-Biochemistry Lab., Department of Pharmacy, University of Genova, 16132 Genova, Italy
| | - Carlo Dufour
- Haematology Unit, Istituto Giannina Gaslini, 16148 Genova, Italy
| | - Simone Cesaro
- Oncoematologia Pediatrica, Azienda Ospedaleira universitaria Integrata, Verona, Italy
| | - Roberta Bottega
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Michela Faleschini
- Institute for Maternal and Child Health – IRCCS Burlo Garofolo, Trieste, Italy
| | - Paola Cuccarolo
- S. C. Mutagenesis, IRCCS AOU San Martino – IST (Istituto Nazionale per la Ricerca sul Cancro), CBA Torre A2, 16123 Genova, Italy
| | - Fabio Corsolini
- Centro Diagnostica Genetica e Biochimica Malattie Metaboliche, Istituto Giannina Gaslini, 16148 Genova, Italy
| | - Cesare Usai
- Institute of Biophysics, National Research Council, 16149 Genova, Italy
| | - Marta Columbaro
- SC Laboratory of Musculoskeletal Cell Biology, IOR, Bologna, Italy
| | - Marco Cipolli
- Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria, Piazzale Stefani, 1-37126 Verona, Italy
| | - Anna Savoia
- Institute for Maternal and Child Health – IRCCS Burlo Garofolo, Trieste, Italy
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Paolo Degan
- S. C. Mutagenesis, IRCCS AOU San Martino – IST (Istituto Nazionale per la Ricerca sul Cancro), CBA Torre A2, 16123 Genova, Italy
| | - Enrico Cappelli
- Haematology Unit, Istituto Giannina Gaslini, 16148 Genova, Italy
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19
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Nicchia E, Benedicenti F, De Rocco D, Greco C, Bottega R, Inzana F, Faleschini M, Bonin S, Cappelli E, Mogni M, Stanzial F, Svahn J, Dufour C, Savoia A. Clinical aspects of Fanconi anemia individuals with the same mutation of FANCF identified by next generation sequencing. ACTA ACUST UNITED AC 2015; 103:1003-10. [PMID: 26033879 DOI: 10.1002/bdra.23388] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Fanconi anemia (FA) is a rare genetic disease characterized by congenital malformations, aplastic anemia and increased risk of developing malignancies. FA is genetically heterogeneous as it is caused by at least 17 different genes. Among these, FANCA, FANCC, and FANCG account for approximately 85% of the patients whereas the remaining genes are mutated in only a small percentage of cases. For this reason, the molecular diagnostic process is complex and not always extended to all the FA genes, preventing the characterization of individuals belonging to rare groups. METHODS The FA genes were analyzed using a next generation sequencing approach in two unrelated families. RESULTS The analysis identified the same, c.484_485del, homozygous mutation of FANCF in both families. A careful examination of three electively aborted fetuses in one family and one affected girl in the other indicated an association of the FANCF loss-of-function mutation with a severe phenotype characterized by multiple malformations. CONCLUSION The systematic use of next generation sequencing will allow the recognition of individuals from rare complementation groups, a better definition of their clinical phenotypes, and consequently, an appropriate genetic counseling.
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Affiliation(s)
- Elena Nicchia
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Francesco Benedicenti
- Genetic Counseling Service, Department of Pediatrics, Regional Hospital of Bolzano, Bolzano, Italy
| | - Daniela De Rocco
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Chiara Greco
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Roberta Bottega
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Francesca Inzana
- Genetic Counseling Service, Department of Pediatrics, Regional Hospital of Bolzano, Bolzano, Italy
| | | | - Serena Bonin
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Enrico Cappelli
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Massimo Mogni
- Human Genetics Laboratory "E.O. Ospedali Galliera", Genoa, Italy
| | - Franco Stanzial
- Genetic Counseling Service, Department of Pediatrics, Regional Hospital of Bolzano, Bolzano, Italy
| | - Johanna Svahn
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Carlo Dufour
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Anna Savoia
- Department of Medical Sciences, University of Trieste, Trieste, Italy.,Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
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20
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Ravera S, Capanni C, Tognotti D, Bottega R, Columbaro M, Dufour C, Cappelli E, Degan P. Inhibition of metalloproteinase activity in FANCA is linked to altered oxygen metabolism. J Cell Physiol 2015; 230:603-9. [PMID: 25161103 DOI: 10.1002/jcp.24778] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 08/18/2014] [Indexed: 01/03/2023]
Abstract
Bone marrow (BM) failure, increased risk of myelodysplastic syndrome, acute leukaemia and solid tumors, endocrinopathies and congenital abnormalities are the major clinical problems in Fanconi anemia patients (FA). Chromosome instability and DNA repair defects are the cellular characteristics used for the clinical diagnosis. However, these biological defects are not sufficient to explain all the clinical phenotype of FA patients. The known defects are structural alteration in cell cytoskeleton, altered structural organization for intermediate filaments, nuclear lamina, and mitochondria. These are associated with different expression and/or maturation of the structural proteins vimentin, mitofilin, and lamin A/C suggesting the involvement of metalloproteinases (MPs). Matrix metalloproteinases (MMP) are involved in normal physiological processes such as human skeletal tissue development, maturation, and hematopoietic reconstitution after bone marrow suppression. Current observations upon the eventual role of MPs in FA cells are largely inconclusive. We evaluated the overall MPs activity in FA complementation group A (FANCA) cells by exposing them to the antioxidants N-acetyl cysteine (NAC) and resveratrol (RV). This work supports the hypothesis that treatment of Fanconi patients with antioxidants may be important in FA therapy.
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Affiliation(s)
- Silvia Ravera
- DIFAR-Biochemistry Lab., Department of Pharmacology, University of Genova, Genova, Italy
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21
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De Rocco D, Bottega R, Cappelli E, Cavani S, Criscuolo M, Nicchia E, Corsolini F, Greco C, Borriello A, Svahn J, Pillon M, Mecucci C, Casazza G, Verzegnassi F, Cugno C, Locasciulli A, Farruggia P, Longoni D, Ramenghi U, Barberi W, Tucci F, Perrotta S, Grammatico P, Hanenberg H, Ragione FD, Dufour C, Savoia A. Molecular analysis of Fanconi anemia: the experience of the Bone Marrow Failure Study Group of the Italian Association of Pediatric Onco-Hematology. Haematologica 2014. [DOI: 10.3324/haematol.2014.116004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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22
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Noris P, Schlegel N, Klersy C, Heller PG, Civaschi E, Pujol-Moix N, Fabris F, Favier R, Gresele P, Latger-Cannard V, Cuker A, Nurden P, Greinacher A, Cattaneo M, De Candia E, Pecci A, Hurtaud-Roux MF, Glembotsky AC, Muñiz-Diaz E, Randi ML, Trillot N, Bury L, Lecompte T, Marconi C, Savoia A, Balduini CL, Bayart S, Bauters A, Benabdallah-Guedira S, Boehlen F, Borg JY, Bottega R, Bussel J, De Rocco D, de Maistre E, Faleschini M, Falcinelli E, Ferrari S, Ferster A, Fierro T, Fleury D, Fontana P, James C, Lanza F, Le Cam Duchez V, Loffredo G, Magini P, Martin-Coignard D, Menard F, Mercier S, Mezzasoma A, Minuz P, Nichele I, Notarangelo LD, Pippucci T, Podda GM, Pouymayou C, Rigouzzo A, Royer B, Sie P, Siguret V, Trichet C, Tucci A, Saposnik B, Veneri D. Analysis of 339 pregnancies in 181 women with 13 different forms of inherited thrombocytopenia. Haematologica 2014; 99:1387-94. [PMID: 24763399 DOI: 10.3324/haematol.2014.105924] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Pregnancy in women with inherited thrombocytopenias is a major matter of concern as both the mothers and the newborns are potentially at risk of bleeding. However, medical management of this condition cannot be based on evidence because of the lack of consistent information in the literature. To advance knowledge on this matter, we performed a multicentric, retrospective study evaluating 339 pregnancies in 181 women with 13 different forms of inherited thrombocytopenia. Neither the degree of thrombocytopenia nor the severity of bleeding tendency worsened during pregnancy and the course of pregnancy did not differ from that of healthy subjects in terms of miscarriages, fetal bleeding and pre-term births. The degree of thrombocytopenia in the babies was similar to that in the mother. Only 7 of 156 affected newborns had delivery-related bleeding, but 2 of them died of cerebral hemorrhage. The frequency of delivery-related maternal bleeding ranged from 6.8% to 14.2% depending on the definition of abnormal blood loss, suggesting that the risk of abnormal blood loss was increased with respect to the general population. However, no mother died or had to undergo hysterectomy to arrest bleeding. The search for parameters predicting delivery-related bleeding in the mother suggested that hemorrhages requiring blood transfusion were more frequent in women with history of severe bleedings before pregnancy and with platelet count at delivery below 50 × 10(9)/L.
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Affiliation(s)
- Patrizia Noris
- Department of Internal Medicine, University of Pavia-IRCCS Policlinico San Matteo Foundation, Italy
| | - Nicole Schlegel
- National Reference Centre on Inherited Platelet Disorders and Service d'Hématologie Biologique, CHU Robert Debré and Paris 7 Denis Diderot University, Paris, France
| | - Catherine Klersy
- Service of Biometry and Statistics, IRCCS Policlinico San Matteo Foundation, Pavia, Italy
| | - Paula G Heller
- Institute of Medical Research Alfredo Lanari, University of Buenos Aires, Argentina
| | - Elisa Civaschi
- Department of Internal Medicine, University of Pavia-IRCCS Policlinico San Matteo Foundation, Italy
| | - Nuria Pujol-Moix
- Universitat Autònoma de Barcelona, Institut de Recerca Biomèdica Sant Pau, Spain
| | - Fabrizio Fabris
- Department of Medicine-DIMED, University of Padova Medical School, Italy
| | - Remi Favier
- AP-HP, Armand Trousseau Children's Hospital, Haematological Laboratory, French Reference Center for Inherited Platelet disorders, Paris, France Inserm UMR1009, Villejuif, France
| | - Paolo Gresele
- Department of Internal Medicine, University of Perugia, Italy
| | - Véronique Latger-Cannard
- Centre de Compétence Nord-Est des Pathologies Plaquettaires from the frame of the Reference French Centre, France Service d'Hématologie Biologique, Centre Hospitalo-Universitaire, Nancy, France
| | - Adam Cuker
- Department of Medicine and Department of Pathology & Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Paquita Nurden
- Plateforme Technologique et d'Innovation Biomédicale, Hôpital Xavier Arnozan, Pessac, France
| | | | - Marco Cattaneo
- Medicina III, Ospedale San Paolo, Dipartimento di Scienze della Salute, Università degli Studi di Milano, Italy
| | - Erica De Candia
- Servizio Malattie Emorragiche e Trombotiche, Istituto di Medicina Interna e Geriatria, Policlinico Agostino Gemelli, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Alessandro Pecci
- Department of Internal Medicine, University of Pavia-IRCCS Policlinico San Matteo Foundation, Italy
| | - Marie-Françoise Hurtaud-Roux
- National Reference Centre on Inherited Platelet Disorders and Service d'Hématologie Biologique, CHU Robert Debré and Paris 7 Denis Diderot University, Paris, France
| | - Ana C Glembotsky
- Institute of Medical Research Alfredo Lanari, University of Buenos Aires, Argentina
| | - Eduardo Muñiz-Diaz
- Immunohematology Department, Banc de Sang i Teixits de Catalunya, Barcelona, Spain
| | - Maria Luigia Randi
- Department of Medicine-DIMED, University of Padova Medical School, Italy
| | - Nathalie Trillot
- Institut d'Hématologie-Transfusion, Pôle Biologie Pathologie Génétique, CHRU, Lille, France
| | - Loredana Bury
- Department of Internal Medicine, University of Perugia, Italy
| | - Thomas Lecompte
- Département des Spécialités de Médecine, Service d'Hématologie, Hôpitaux Universitaires de Genève, Suisse Université de Genève, Faculté de Médecine, Suisse
| | - Caterina Marconi
- Genetica Medica, Dipartimento di Scienze Mediche Chirurgiche, Policlinico Sant'Orsola-Malpighi, University of Bologna, Italy
| | - Anna Savoia
- Department of Medical Sciences, University of Trieste, Italy Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Carlo L Balduini
- Department of Internal Medicine, University of Pavia-IRCCS Policlinico San Matteo Foundation, Italy
| | - Sophie Bayart
- Service d'Hémostase Bio-Clinique, Centre Régional de traitement des maladies hémorragiques de Rennes-Bretagne, CHU de Rennes, Rennes, France
| | - Anne Bauters
- Institut d'Hématologie-Transfusion, Pôle Biologie Pathologie Génétique, CHRU Lille, France
| | | | - Françoise Boehlen
- Division of Angiology and Haemostasis, Department of Medical Specialisations, Faculty of Medicine and University Hospitals of Geneva, Geneva, Switzerland Geneva Platelet Group, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | | | - Roberta Bottega
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - James Bussel
- Weill Medical College of Cornell University, New York, NY, USA
| | - Daniela De Rocco
- Department of Medical Sciences, University of Trieste, Trieste, Italy
| | - Emmanuel de Maistre
- Service d'hématologie Biologie, Centre Hospitalo-Universitaire Dijon, France
| | | | | | - Silvia Ferrari
- Department of Medicine-DIMED; University of Padova Medical School, Padova, Italy
| | - Alina Ferster
- Unité d'Hémato-Oncologie pédiatrique, Hôpital Universitaire des Enfants Reine Fabiola, Bruxelles, Belgique
| | - Tiziana Fierro
- Department of Internal Medicine, University of Perugia, Perugia, Italy
| | | | - Pierre Fontana
- Division of Angiology and Haemostasis, Department of Medical Specialisations, Faculty of Medicine and University Hospitals of Geneva, Geneva, Switzerland Geneva Platelet Group, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Chloé James
- Laboratoire d'Hématologie and National Reference Centre on Inherited Platelet Disorders, CHU Haut Lévêque, Pessac, France
| | | | | | - Giuseppe Loffredo
- Department of Oncology, Azienda Santobono-Pausilipon, Pausilipon Hospital, Napoli, Italy
| | - Pamela Magini
- Genetica Medica, Dipartimento di Scienze Mediche Chirurgiche, Policlinico Sant'Orsola-Malpighi - University of Bologna, Bologna, Italy
| | | | - Fanny Menard
- Centre Hospitalier de la côte basque, Bayonne, France
| | - Sandra Mercier
- Service de Génétique Clinique, Centre de Référence Anomalies du Développement du Grand Ouest, CHU Rennes-Hôpital Sud, Rennes, France
| | | | - Pietro Minuz
- Department of Medicine and Haematology, University Hospital of Verona, Verona, Italy
| | - Ilaria Nichele
- Department of Cell Therapy and Hematology, San Bortolo Hospital, Vicenza, Italy
| | | | - Tommaso Pippucci
- Genetica Medica, Dipartimento di Scienze Mediche Chirurgiche, Policlinico Sant'Orsola-Malpighi - University of Bologna, Bologna, Italy
| | - Gian Marco Podda
- Medicina III, Ospedale San Paolo, Dipartimento di Scienze della Salute, Università degli Studi di Milano, Italy
| | - Catherine Pouymayou
- Laboratoire d'Hématologie and National Reference Centre on Inherited Platelet Disorders, CHU La Timone, Marseille, France
| | - Agnes Rigouzzo
- AP-HP, Armand Trousseau children Hospital, Department of Anesthesiology, Paris, France
| | - Bruno Royer
- Hématologie clinique et thérapie cellulaire, CHU Amiens, France
| | - Pierre Sie
- Laboratoire d'Hématologie and National Reference Centre of Inherited Platelet Disorders, CHU Rangueil, Toulouse, France
| | - Virginie Siguret
- Service d' Hématologie Biologique, CHU Hôpital Européen Georges Pompidou, Paris, France
| | - Catherine Trichet
- Service de Biologie Clinique Secteur Hématologie, CH Victor Dupouy, Argenteuil, France
| | - Alessandra Tucci
- Hematology Unit, Spedali Civili Hospital and University of Brescia, Brescia, Italy
| | - Béatrice Saposnik
- National Reference Centre on Inherited Platelet Disorders and Service d'Hématologie Biologique, CHU Robert Debré and Paris 7 Denis Diderot University, Paris, France
| | - Dino Veneri
- Department of Medicine and Haematology, University Hospital of Verona, Verona, Italy
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23
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De Rocco D, Bottega R, Cappelli E, Cavani S, Criscuolo M, Nicchia E, Corsolini F, Greco C, Borriello A, Svahn J, Pillon M, Mecucci C, Casazza G, Verzegnassi F, Cugno C, Locasciulli A, Farruggia P, Longoni D, Ramenghi U, Barberi W, Tucci F, Perrotta S, Grammatico P, Hanenberg H, Della Ragione F, Dufour C, Savoia A. Molecular analysis of Fanconi anemia: the experience of the Bone Marrow Failure Study Group of the Italian Association of Pediatric Onco-Hematology. Haematologica 2014; 99:1022-31. [PMID: 24584348 DOI: 10.3324/haematol.2014.104224] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Fanconi anemia is an inherited disease characterized by congenital malformations, pancytopenia, cancer predisposition, and sensitivity to cross-linking agents. The molecular diagnosis of Fanconi anemia is relatively complex for several aspects including genetic heterogeneity with mutations in at least 16 different genes. In this paper, we report the mutations identified in 100 unrelated probands enrolled into the National Network of the Italian Association of Pediatric Hematoly and Oncology. In approximately half of these cases, mutational screening was carried out after retroviral complementation analyses or protein analysis. In the other half, the analysis was performed on the most frequently mutated genes or using a next generation sequencing approach. We identified 108 distinct variants of the FANCA, FANCG, FANCC, FANCD2, and FANCB genes in 85, 9, 3, 2, and 1 families, respectively. Despite the relatively high number of private mutations, 45 of which are novel Fanconi anemia alleles, 26% of the FANCA alleles are due to 5 distinct mutations. Most of the mutations are large genomic deletions and nonsense or frameshift mutations, although we identified a series of missense mutations, whose pathogenetic role was not always certain. The molecular diagnosis of Fanconi anemia is still a tiered procedure that requires identifying candidate genes to avoid useless sequencing. Introduction of next generation sequencing strategies will greatly improve the diagnostic process, allowing a rapid analysis of all the genes.
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Affiliation(s)
| | - Roberta Bottega
- Department of Medical Sciences, University of Trieste, Italy
| | - Enrico Cappelli
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Simona Cavani
- Human Genetics laboratory, "E.O. Ospedali Galliera", Genoa, Italy
| | - Maria Criscuolo
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Italy
| | - Elena Nicchia
- Department of Medical Sciences, University of Trieste, Italy
| | - Fabio Corsolini
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Chiara Greco
- Pediatric Onco-Hematology, "Azienda Ospedaliero Universitaria Pisana", Pisa, Italy
| | - Adriana Borriello
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Italy
| | - Johanna Svahn
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Marta Pillon
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | | | | | - Federico Verzegnassi
- Pediatric Onco-Hematology, "Azienda Ospedaliero Universitaria Pisana", Pisa, Italy
| | - Chiara Cugno
- Pediatric Onco-Hematology, "Fondazione IRCCS Policlinico San Matteo", Pavia, Italy
| | - Anna Locasciulli
- Department of Pediatric and Pediatric Hematology, S.Camillo Hospital, Rome, Italy
| | - Piero Farruggia
- Pediatric Onco-Hematology, ARNAS Civico Hospital, Palermo, Italy
| | - Daniela Longoni
- Pediatrics Unit, University of Milano-Bicocca, Fondazione MBBM, Ospedale San Gerardo, Monza, Italy
| | - Ugo Ramenghi
- Department of Pediatric and Public Health Sciences, Sapienza Università di Roma, Firenze, Italy
| | - Walter Barberi
- Dipartimento di Biotecnologia Cellulari ed Ematologia, Sapienza Università di Roma, Firenze, Italy
| | - Fabio Tucci
- Pediatric Onco-Hematology, "Azienda Ospedaliero-Universitaria" Meyer, Firenze, Italy
| | | | - Paola Grammatico
- Department of Molecular Medicine, "La Sapienza" University, Rome, Italy
| | - Helmut Hanenberg
- Department of Otorhinolaryngology & Head/Neck Surgery, Heinrich Heine University School of Medicine, Duesseldorf, Germany Pediatric Hematology/Oncology, Wells Center for Pediatric Research, Department of Pediatrics, The Riley Hospital, Indiana University School of Medicine, Indianapolis, IN, USA Department of Medical & Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Fulvio Della Ragione
- Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Italy
| | - Carlo Dufour
- Clinical and Experimental Hematology Unit, G. Gaslini Children's Hospital, Genoa, Italy
| | - Anna Savoia
- Department of Medical Sciences, University of Trieste, Italy Pediatric Onco-Hematology, "Azienda Ospedaliero Universitaria Pisana", Pisa, Italy
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De Rocco D, Zieger B, Platokouki H, Heller PG, Pastore A, Bottega R, Noris P, Barozzi S, Glembotsky AC, Pergantou H, Balduini CL, Savoia A, Pecci A. MYH9-related disease: five novel mutations expanding the spectrum of causative mutations and confirming genotype/phenotype correlations. Eur J Med Genet 2012; 56:7-12. [PMID: 23123319 PMCID: PMC3546164 DOI: 10.1016/j.ejmg.2012.10.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/21/2012] [Indexed: 11/24/2022]
Abstract
MYH9-related disease (MYH9-RD) is a rare autosomal dominant syndromic disorder caused by mutations in MYH9, the gene encoding for the heavy chain of non-muscle myosin IIA (myosin-9). MYH9-RD is characterized by congenital macrothrombocytopenia and typical inclusion bodies in neutrophils associated with a variable risk of developing sensorineural deafness, presenile cataract, and/or progressive nephropathy. The spectrum of mutations responsible for MYH9-RD is limited. We report five families, each with a novel MYH9 mutation. Two mutations, p.Val34Gly and p.Arg702Ser, affect the motor domain of myosin-9, whereas the other three, p.Met847_Glu853dup, p.Lys1048_Glu1054del, and p.Asp1447Tyr, hit the coiled-coil tail domain of the protein. The motor domain mutations were associated with more severe clinical phenotypes than those in the tail domain.
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Affiliation(s)
- Daniela De Rocco
- Institute for Maternal and Child Health, IRCCS "Burlo Garofolo", Trieste, Italy
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25
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Bottega R, Pecci A, De Candia E, Pujol-Moix N, Heller PG, Noris P, De Rocco D, Podda GM, Glembotsky AC, Cattaneo M, Balduini CL, Savoia A. Correlation between platelet phenotype and NBEAL2 genotype in patients with congenital thrombocytopenia and α-granule deficiency. Haematologica 2012; 98:868-74. [PMID: 23100277 DOI: 10.3324/haematol.2012.075861] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The gray platelet syndrome is a rare inherited bleeding disorder characterized by macrothrombocytopenia and deficiency of alpha (α)-granules in platelets. The genetic defect responsible for gray platelet syndrome was recently identified in biallelic mutations in the NBEAL2 gene. We studied 11 consecutive families with inherited macrothrombocytopenia of unknown origin and α-granule deficiency. All of them underwent NBEAL2 DNA sequencing and evaluation of the platelet phenotype, including a systematic assessment of the α-granule content by immunofluorescence analysis for α-granule secretory proteins. We identified 9 novel mutations hitting the two alleles of NBEAL2 in 4 probands. They included missense, nonsense and frameshift mutations, as well as nucleotide substitutions that altered the splicing mechanisms as determined at the RNA level. All the individuals with NBEAL2 biallelic mutations showed almost complete absence of platelet α-granules. Interestingly, the 13 individuals assumed to be asymptomatic because carriers of a mutated allele had platelet macrocytosis and significant reduction of the α-granule content. However, they were not thrombocytopenic. In the remaining 7 probands, we did not identify any NBEAL2 alterations, suggesting that other genetic defect(s) are responsible for their platelet phenotype. Of note, these patients were characterized by a lower severity of the α-granule deficiency than individuals with two NBEAL2 mutated alleles. Our data extend the spectrum of mutations responsible for gray platelet syndrome and demonstrate that macrothrombocytopenia with α-granule deficiency is a genetic heterogeneous trait. In terms of practical applications, the screening of NBEAL2 is worthwhile only in patients with macrothrombocytopenia and severe reduction of the α-granules. Finally, individuals carrying one NBEAL2 mutated allele have mild laboratory abnormalities, suggesting that even haploinsufficiency has an effect on platelet phenotype.
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Affiliation(s)
- Roberta Bottega
- Department of Medical Sciences, University of Trieste, Trieste, Italy
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26
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Noris P, Perrotta S, Bottega R, Pecci A, Melazzini F, Civaschi E, Russo S, Magrin S, Loffredo G, Di Salvo V, Russo G, Casale M, De Rocco D, Grignani C, Cattaneo M, Baronci C, Dragani A, Albano V, Jankovic M, Scianguetta S, Savoia A, Balduini CL. Clinical and laboratory features of 103 patients from 42 Italian families with inherited thrombocytopenia derived from the monoallelic Ala156Val mutation of GPIbα (Bolzano mutation). Haematologica 2011; 97:82-8. [PMID: 21933849 DOI: 10.3324/haematol.2011.050682] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Bernard-Soulier syndrome is a very rare form of inherited thrombocytopenia that derives from mutations in GPIbα, GPIbβ, or GPIX and is typically inherited as a recessive disease. However, some years ago it was shown that the monoallelic c.515C>T transition in the GPIBA gene (Bolzano mutation) was responsible for macrothrombocytopenia in a few Italian patients. DESIGN AND METHODS Over the past 10 years, we have searched for the Bolzano mutation in all subjects referred to our institutions because of an autosomal, dominant form of thrombocytopenia of unknown origin. RESULTS We identified 42 new Italian families (103 cases) with a thrombocytopenia induced by monoallelic Bolzano mutation. Analyses of the geographic origin of affected pedigrees and haplotypes indicated that this mutation originated in southern Italy. Although the clinical expression was variable, patients with this mutation typically had a mild form of Bernard-Soulier syndrome with mild thrombocytopenia and bleeding tendency. The most indicative laboratory findings were enlarged platelets and reduced GPIb/IX/V platelet expression; in vitro platelet aggregation was normal in nearly all of the cases. CONCLUSIONS Our study indicates that monoallelic Bolzano mutation is the most frequent cause of inherited thrombocytopenia in Italy, affecting 20% of patients recruited at our institutions during the last 10 years. Because many people from southern Italy have emigrated during the last century, this mutation may have spread to other countries.
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Affiliation(s)
- Patrizia Noris
- Istituto di Ricovero e Cura a Carattere Scientifico Policlinico San Matteo Foundation, University of Pavia, Pavia, Italy.
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Savoia A, Pastore A, De Rocco D, Civaschi E, Di Stazio M, Bottega R, Melazzini F, Bozzi V, Pecci A, Magrin S, Balduini CL, Noris P. Clinical and genetic aspects of Bernard-Soulier syndrome: searching for genotype/phenotype correlations. Haematologica 2010; 96:417-23. [PMID: 21173099 DOI: 10.3324/haematol.2010.032631] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Bernard-Soulier syndrome is a severe bleeding disease due to a defect of GPIb/IX/V, a platelet complex that binds the von Willebrand factor. Due to the rarity of the disease, there are reports only on a few cases compromising any attempt to establish correlations between genotype and phenotype. In order to identify any associations, we describe the largest case series ever reported, which was evaluated systematically at the same center. DESIGN AND METHODS Thirteen patients with the disease and seven obligate carriers were enrolled. We collected clinical aspects and determined platelet features, including number and size, expression of membrane glycoproteins, and ristocetin induced platelet aggregation. Mutations were identified by direct sequencing of the GP1BA, GP1BB, and GP9 genes and their effect was shown by molecular modeling analyses. RESULTS Patients all had a moderate thrombocytopenia with giant platelets and a bleeding tendency whose severity varied among individuals. Consistent with expression levels of GPIbα always lower than 10% of control values, platelet aggregation was absent or severely reduced. Homozygous mutations were identified in the GP1BA, GP1BB and GP9 genes; six were novel alterations expected to destabilize the conformation of the respective protein. Except for obligate carriers of a GP9 mutation with a reduced GPIb/IX/V expression and defective aggregation, all the other carriers had no obvious anomalies. CONCLUSIONS Regardless of mutations identified, the patients' bleeding diathesis did not correlate with thrombocytopenia, which was always moderate, and platelet GPIbα expression, which was always severely impaired. Obligate carriers had features similar to controls though their GPIb/IX/V expression showed discrepancies. Aware of the limitations of our cohort, we cannot define any correlations. However, further investigations should be encouraged to better understand the causes of this rare and underestimated disease.
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Affiliation(s)
- Anna Savoia
- Department of Reproductive and Developmental Sciences and Public Medicine Sciences, University of Trieste, Trieste, Italy.
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Farhood H, Gao X, Son K, Yang YY, Lazo JS, Huang L, Barsoum J, Bottega R, Epand RM. Cationic liposomes for direct gene transfer in therapy of cancer and other diseases. Ann N Y Acad Sci 1994; 716:23-34; discussion 34-5. [PMID: 8024197 DOI: 10.1111/j.1749-6632.1994.tb21701.x] [Citation(s) in RCA: 88] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Cationic liposomes can mediate efficient delivery of DNA and DNA/protein complex to mammalian cells in vitro and in vivo. Cationic cholesterol derivatives mixed with phosphatidylethanolamine and sonicated to form small unilamellar vesicles can complex with DNA and mediate the entry into the cytosol from the endosome compartment. One of the liposome formulations, DC-Chol liposomes, is used in a gene therapy clinical trial for melanoma. Recently, we exploited these cationic liposomes for the delivery of trans-activating protein factors to regulate and control the expression of delivered transgenes in a protein dose-dependent manner. Bacteriophage T7 RNA polymerase was co-delivered with a reporter gene under the control of T7 promoter to allow cytoplasmic expression of the gene. Human immunodeficiency virus-1 transactivating protein was also codelivered with a reporter gene under the control of HIV-1 long terminal repeat. Finally, human tumor cells selected for cis-platin resistance or isolated from patients who have failed cis-platin therapy are highly transfectable with cationic liposomes. These results suggest a serial therapy protocol with cis-platin and gene therapy for malignancy.
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Affiliation(s)
- H Farhood
- Department of Pharmacology, University of Pittsburgh School of Medicine, Pennsylvania 15261
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Farhood H, Bottega R, Epand RM, Huang L. Effect of cationic cholesterol derivatives on gene transfer and protein kinase C activity. Biochim Biophys Acta 1992; 1111:239-46. [PMID: 1420259 DOI: 10.1016/0005-2736(92)90316-e] [Citation(s) in RCA: 196] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Four different cationic derivatives of cholesterol were synthesized which contain either a tertiary or a quaternary amino head group, with and without a succinyl spacer-arm. Their ability to inhibit protein kinase C (PKC) activity was measured in a detergent mixed micellar solution. Derivatives containing a quaternary amino head group were effective inhibitors (Ki approx. 12 and 59 microM) of PKC and derivatives containing a tertiary amino head group were approx. 4-20-fold less inhibitory. Liposomes containing an equimolar mixture of dioleoylphosphatidylethanolamine (DOPE) and a cationic cholesterol derivative were tested for the DNA-mediated transfection activity in mouse L929 cells. Highest activity was found with the derivative with low PKC inhibitory activity and with a succinyl spacer-arm. The transfection activity of this tertiary amine derivative, N,N-dimethylethylenediaminyl succinyl cholesterol was dependent on DOPE as a helper lipid; liposomes containing dioleoylphosphatidylcholine and this derivative had little activity. The transfection protocol of this new cationic liposome reagent was optimized with respect to the ratio of liposome/DNA, dose of the complex and time of incubation with cells. Several adherent cell lines could be efficiently transfected with this liposome reagent without any apparent cytotoxicity. However, the transfection activity was strongly inhibited by the presence of serum components.
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Affiliation(s)
- H Farhood
- Cell, Molecular and Developmental Biology Program, University of Tennessee, Knoxville
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Abstract
A large number of PKC inhibitors are positively charged. We evaluated the structural features of cationic amphiphiles which are necessary for inhibiting PKC. Many of these compounds were derivatives of cholesterol, which possesses a hydrophobic backbone which does not perturb hydrocarbon packing in membrane bilayers. In addition, they contain a tertiary or quaternary nitrogen functionality in the head group. All designed cholesterol-based amphiphiles inhibit PKC activity; the potency of the amphiphile correlates with the presence of positive charge. Quaternary ammonium amphiphiles are 10-fold more potent than their tertiary amine counterparts, generally inhibiting in the 10-60 microM range using the Triton mixed micelle assay. Aside from charge, factors such as the structure of the amine-containing head group, its length from the hydrocarbon moiety, or the number of amine groups on the amphiphile did not markedly influence inhibitor potency. In contrast, the hydrocarbon backbone did influence potency: cationic amphiphiles containing a steroid backbone were more potent inhibitors of PKC than their straight-chain analogues. Changing the nature of the hydrocarbon from a sterol to an alkyl group lowers the pK of the amine head group so that the straight-chain analogues are no longer cationic in the conditions in the PKC assay. The results of these studies suggest that a combination of positive charge and a bilayer-stabilizing structural characteristic provides a basis for the rational design of PKC inhibitors.
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Affiliation(s)
- R Bottega
- Department of Biochemistry, McMaster University, Hamilton, Ontario, Canada
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31
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Abstract
The role of the 2-amino group of sphingosine on the in vitro inhibition of protein kinase C was investigated by comparing protein kinase C activity in the presence and absence of sphingosine at various pH's. Inhibition by sphingosine was found to be pH dependent. Above pH 7.75, sphingosine has little or no inhibitory effect. In fact, at pH 8.5, sphingosine slightly enhances enzyme activity above that which occurs when the enzyme is stimulated by diacylglycerol and phosphatidylserine. After correcting for electrostatic repulsion, we find that the intrinsic pK for sphingosine in Triton micelles is 8.5. Inhibition of protein kinase C by sphingosine at physiological pH's therefore correlates with the presence of a positive charge.
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Affiliation(s)
- R Bottega
- Department of Biochemistry, McMaster University, Hamilton, Ontario, Canada
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Epand RM, Stafford AR, Bottega R, Ball EH. Studies on the mechanism of action of a bilayer stabilizing inhibitor of protein kinase C: cholesterylphosphoryldimethylethanolamine. Biosci Rep 1989; 9:315-28. [PMID: 2775861 DOI: 10.1007/bf01114684] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Cholesterylphosphoryldimethylethanolamine is a zwitterionic compound which is a good bilayer stabilizer. As has been found with many other compounds having these properties, cholesterylphosphoryldimethylethanolamine is found to be a potent inhibitor of protein kinase C in both vesicle and micelle assay systems. The kinetics of the inhibition in Triton X-100 micelles was non-competitive with respect to ATP, histone, diolein, phorbol ester and Ca2+. It has a Ki of about 30 microns. The inhibition kinetics as a function of phosphatidylserine concentration is more complex but suggestive of competitive inhibition. Cholesterylphosphoryldimethylethanolamine does not prevent the partitioning of protein kinase C into the membrane. This inhibitor lowers the Ca2+-phosphatidylserine-independent phosphorylation of protamine sulfate by protein kinase C and directly affects the catalytic segment of the enzyme generated by tryptic hydrolysis. Thus, this zwitterionic bilayer stabilizing inhibitor of protein kinase C both competes with the binding of phosphatidylserine as well as affects the active site of protein kinase C.
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Affiliation(s)
- R M Epand
- Department of Biochemistry, McMaster University, Hamilton, Ontario, Canada
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Epand RM, Bottega R. Determination of the phase behaviour of phosphatidylethanolamine admixed with other lipids and the effects of calcium chloride: implications for protein kinase C regulation. Biochim Biophys Acta 1988; 944:144-54. [PMID: 3179286 DOI: 10.1016/0005-2736(88)90427-0] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The phase behaviour of 1-palmitoyl-2-oleoylphosphatidylethanolamine (POPE) was studied by differential scanning calorimetry and 31P-NMR spectroscopy. Modulation of the phase behaviour of POPE by 1-palmitoyl-2-oleoylphosphatidylserine (POPS). 1-palmitoyl-2-oleoylphosphatidylcholine (POPC), 1,2-di-olein (DOG), CaCl2, MgCl2, and combinations of these substances was studied. The bilayer-forming lipids, POPS and POPC, raise the bilayer-to-hexagonal phase-transition temperature of POPE. The POPC has a greater effect than POPS, probably because the former lipid is more miscible with POPE. Addition of 10 mM CaCl2 has little effect on the phase-transitions of POPE/POPC mixtures, but it greatly decreases the effectiveness of POPS in raising the bilayer-to-hexagonal phase-transition temperature of POPE. The effectiveness of DOG in lowering the phase-transition temperature of POPE is also greatly reduced in the presence of 10 mM CaCl2. This phenomenon may play a role in the negative feedback regulation of protein kinase C.
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Affiliation(s)
- R M Epand
- Department of Biochemistry, McMaster University Health Sciences Centre, Hamilton, Ontario, Canada
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Epand RM, Stafford AR, Cheetham JJ, Bottega R, Ball EH. The relationship between the bilayer to hexagonal phase transition temperature in membranes and protein kinase C activity. Biosci Rep 1988; 8:49-54. [PMID: 3395673 DOI: 10.1007/bf01128971] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
A number of substances affect the activity of protein kinase C. Among uncharged and zwitterionic compounds, those which activate protein kinase C also lower the bilayer to hexagonal phase transition temperature of dielaidoylphosphatidylethanolamine while substances which inhibit protein kinase C raise this transition temperature. Using this criteria, we have identified 3 beta-chloro-5-cholestene, 5 beta-cholan-24-ol and eicosane as new protein kinase C activators and have shown that Z-Ser-Leu-NH2, Z-Gly-Leu-NH2, Z-Tyr-Leu-NH2, cyclosporin A and cholestan-3 beta, 5 alpha, 6 beta-triol are protein kinase C inhibitors.
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Affiliation(s)
- R M Epand
- Department of Biochemistry, McMaster University Health Sciences Centre, Hamilton, Ontario
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Abstract
Cholesterol lowers the bilayer to hexagonal phase transition temperature of phosphatidylethanolamines up to a mole fraction of about 0.1. At cholesterol mole fractions above about 0.3, the effect of this sterol is to stabilize the bilayer phase. The relatively weak effects of cholesterol in altering the bilayer to hexagonal phase transition temperature can be explained on the basis of lateral phase separation. This is indicated by the horizontal liquidus line for the gel to liquid-crystalline transition in the phase diagram for mixtures of cholesterol with dielaidoylphosphatidylethanolamine (DEPE) as well as the fact that cholesterol does not greatly decrease the cooperativity of the bilayer to hexagonal phase transition. The enthalpy of this latter transition increased with increasing mole fractions of cholesterol. Two oxidation products of cholesterol are 5-cholesten-3 beta,7 alpha-diol and cholestan-3 beta,5 alpha,6 beta-triol. Compared with cholesterol, 5-cholesten-3 beta,7 alpha-diol had a greater effect in decreasing the bilayer to hexagonal phase transition temperature and broadening this transition. It is suggested that its effectiveness is due to its greater solubility in the DEPE. In contrast, cholestan-3 beta,5 alpha,6 beta-triol raises the bilayer to hexagonal phase transition temperature of DEPE. This is due to its larger and more hydrophilic head group. In addition, its length, being shorter than that of DEPE, would not allow it to pack efficiently in a hexagonal phase arrangement. We suggest that this same effect is responsible for cholesterol raising the bilayer to hexagonal phase transition temperature at higher mole fractions.
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