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De Maglio G, Pasello G, Follador A, Nardo G, Cortiula F, De Conte A, D’Urso A, Petros G, Girlando S, Miorin M, Polo V, Scquizzato E, Settanni G, Picece V, Veccia A, Indraccolo S. Liquid biopsy in clinical pratice of non-small cell lung cancer (NSCLC): A multi-institutional experience. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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2
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Gava A, Furlan A, Navaglia F, Miorin M, Razetti M, Basso D, Plebani M, Punzi L. [Utility of denaturing high performance liquid chromatography (DHPLC) for the diagnosis of mevalonate kinase deficiency in periodic disease]. Reumatismo 2009; 61:187-96. [PMID: 19888504 DOI: 10.4081/reumatismo.2009.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES We developed a genetic investigation using denaturing high performance liquid chromatography (DHPLC), in order to identify polymorphisms of the gene MVK in patients with autoinflammatory syndrome suspicion. METHODS We evaluated 19 patients affected by recurrent fevers and other clinical manifestations usually found in autoinflammatory syndromes and not correlated with infections or autoimmune disease and 10 healthy controls. IgD level was measured in all patients. Molecular testing was performed in DNA extracted from PBMC and MVK gene was analysed either with DHPLC or with automatic sequencer. Primers for PCR amplifications, amplicon lengths and PCR conditions were designed in our laboratory. RESULTS IgD level was normal in 14 patients. Healthy controls did not show any alteration of the DHPLC-profiles and of the DNA sequences. Twelve patients had at least one altered DHPLC-profile and these data have been confirmed by sequencing. In particular we detected the polymorphisms c.78+61A>G, S52N, S135S, D170D, c.632-18A>G, c.885+24G>A already described in the database INFEVERS. With DHPLC we got the results in shorter time (10 hours/patient) and with lower cost (40 euro/patient) in comparison to direct sequencing (25 hours and 150 euro/patient). CONCLUSIONS High IgD levels do not represent an essential marker for diagnosis of MKD, as already reported in literature. DHPLC is a rapid low cost technique in order to screen mutations in patients with MKD suspicion. Twelve patients carried at the same time D170D and c.632-18A>G: such event suggests that these SNPs could be in linkage disequilibrium and that such polymorphisms could predispose to MKD.
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Affiliation(s)
- A Gava
- Cattedra e UOC di Reumatologia, Dipartimento di Medicina Clinica e Sperimentale, Università degli Studi di Padova, Italia.
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Cabrelle A, Maschio N, Carraro S, Frezzato F, Binotto G, Gattazzo C, Miorin M, Agostini C, Zambello R, Pandolfi F, Semenzato G, Trentin L. Apoptotic effect of cyclosporin a and dexamethasone in malignant cells of patients with B-chronic lymphocytic leukemia. J BIOL REG HOMEOS AG 2009; 23:239-250. [PMID: 20003763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
B-chronic lymphocytic leukemia (B-CLL) is a malignant disorder characterized by the accumulation of the leukemic cells in the G0-G1 phase of the cell cycle and expressing high levels of the anti-apoptotic protein Bcl-2. Since we observed that the treatment of autoimmune complications with Cyclosporine A (CsA) determined in some CLL patients an improvement not only of the autoimmune phenomena, but also of the leukemic process, we evaluated the in vitro cytotoxicity of CsA as compared to Dexamethasone (Dex) on leukemic cells. Leukemic cells obtained from 32 B-CLL patients showed a heterogeneous pattern of spontaneous apoptosis at 24 h interval and this pattern permitted to identify: Group 1 (14/32) with high (>20%) apoptotic rate and Group 2 (18/32) with low cell death. CsA and Dex increased cell death in both groups with a different timing by an apoptotic mechanism that does not involve Bcl-2. Furthermore, in Group 2, CsA-induced apoptosis was significant higher than that observed with Dex both at 4 and 24 h. We suggest that, in B-CLL, CsA has a significant pro-apoptotic activity manifested also in patients with low spontaneous apoptosis. Our observations might be taken into account to consider new therapeutic strategies in B-CLL.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Anti-Inflammatory Agents/pharmacology
- Apoptosis/drug effects
- Cyclosporine/pharmacology
- Dexamethasone/pharmacology
- Female
- G1 Phase/drug effects
- Gene Expression Regulation, Leukemic/drug effects
- Humans
- Immunosuppressive Agents/pharmacology
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Male
- Middle Aged
- Proto-Oncogene Proteins c-bcl-2/biosynthesis
- Resting Phase, Cell Cycle/drug effects
- Time Factors
- Tumor Cells, Cultured
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Affiliation(s)
- A Cabrelle
- Department of Clinical and Experimental Medicine, Hematology and Clinical Immunology Branch, University of Padua, Padua, Italy
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Mostacciuolo ML, Pastorello E, Vazza G, Miorin M, Angelini C, Tomelleri G, Galluzzi G, Trevisan CP. Facioscapulohumeral muscular dystrophy: epidemiological and molecular study in a north-east Italian population sample. Clin Genet 2009; 75:550-5. [PMID: 19320656 DOI: 10.1111/j.1399-0004.2009.01158.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Facioscapulohumeral muscular dystrophy (FSHD) is an autosomal dominant disease associated with a partial deletion on chromosome 4q35. Few relevant investigations have been reported on its epidemiology and were essentially based on clinical diagnosis, having been performed before recognition of the molecular mutation. We report an epidemiological survey on FSHD patients, in which the diagnosis was obtained by combined clinical and molecular evaluation. The survey concerned the north-east Italian province of Padova, an area of 871,190 inhabitants (1 January 2004). We identified 40 patients affected by FSHD based on clinical diagnosis. In 33 of them, the EcoRI fragment size in the 4q35 region ranged from 14 to 35 kb. Four other patients belonging to the same family harbored a 38-kb fragment. In these four cases, the relationship between the borderline deletion with the mild FSHD phenotype was corroborated by additional haplotype reconstruction and segregation analysis. Interestingly, the same mild facial-sparing clinical pattern was apparent only in one other patient with an EcoRI fragment of 32 kb, suggesting that this unusual FSHD phenotype may be due to very small 4q35 deletions. On the whole, estimating a prevalence rate of 44 x 10(-6), our survey confirmed FSHD as one of the most frequent neuromuscular disorders in Western populations.
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Scquizzato E, Teramo A, Miorin M, Facco M, Piazza F, Noventa F, Trentin L, Agostini C, Zambello R, Semenzato G. Genotypic evaluation of killer immunoglobulin-like receptors in NK-type lymphoproliferative disease of granular lymphocytes. Leukemia 2007; 21:1060-9. [PMID: 17361229 DOI: 10.1038/sj.leu.2404634] [Citation(s) in RCA: 34] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Using polymerase chain reaction (PCR)-based sequence-specific primers, the killer immunoglobulin-like receptor (KIR) genotypes of 35 patients with natural killer (NK)-type lymphoproliferative disease of granular lymphocytes and of 50 normal subjects were investigated to evaluate whether genes coding for activating KIRs were more frequently detected in patients with NK-lymphoproliferative disease of granular lymphocytes (LDGL). Genotype frequency indicated that the most frequently found gene content was eight genes in controls and 14 in patients (P<0.05). The KIR genotype analysis revealed that patient and, surprisingly, control KIR genotypes preferentially consisted of type B haplotypes characterized by the presence of multiple-activating KIRs. Evidence was also provided that the same KIR genotype was shared by a variable number of patients. Interestingly, the recurrent genotypes observed in the patient group were not found in controls. Concerning inhibitory genes, KIR2DL5a and 2DL5b were more frequently detected in patients than in controls (P<0.01), likely representing a discrete feature of the genetic repertoire of the patients. KIR gene repertoire analysis in patients suggests that the susceptibility to NK-LDGL might be related to the presence of activating KIR genes and supports the concept that these receptors may be involved in the priming of granular lymphocytes (GL) proliferation. Population analysis might disclose a genetic background predisposing to this disease.
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Affiliation(s)
- E Scquizzato
- Padua University School of Medicine, Department of Clinical and Experimental Medicine, Hematology and Clinical Immunology Branch, Padova, Italy
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6
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Siciliano G, Manca M, Gennarelli M, Angelini C, Rocchi A, Iudice A, Miorin M, Mostacciuolo M. Epidemiology of myotonic dystrophy in Italy: re-apprisal after genetic diagnosis. Clin Genet 2002; 59:344-9. [PMID: 11359466 DOI: 10.1034/j.1399-0004.2001.590508.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [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: 11/23/2022]
Abstract
Before the discovery of the myotonic dystrophy (DM) gene, the DM epidemiological rates could not be accurately estimated. The aim of this study was to calculate the DM prevalence rates in Padova (North-East Italy) and in four provinces of North-West Tuscany (Central Italy) and, as of 30 June 1999, to do so using molecular genetic testing. A minimum prevalence rate of 9.31x10(-5) inhabitants was found, consistent with epidemiological rates worldwide, and more than two times as high as those of two previous studies conducted in the same areas during the era prior to molecular genetic testing. This study, the first in Italy since the discovery of the DM gene, underlines the importance of direct genetic diagnosis of DM, especially in detecting mildly affected patients, a fundamental step in correctly estimating the risk of disease transmission in affected families.
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Affiliation(s)
- G Siciliano
- Department of Neuroscience, University of Pisa, Pisa, Italy.
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7
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Haymar D'Ettory R, Baldo V, Miorin M, Carletti M, Bonaventura M, Marcato R, Lunardi E, Trivello R. [Limitations and/or prescriptions in health personnel. Study at a Veneto hospital]. Ann Ig 2001; 13:239-46. [PMID: 11490899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- R Haymar D'Ettory
- Dip. di Medicina Ambientale e Sanità Pubblica, Sede di Igiene, Università degli Studi di Padova
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Rampazzo A, Nava A, Miorin M, Fonderico P, Pope B, Tiso N, Livolsi B, Zimbello R, Thiene G, Danieli GA. ARVD4, a new locus for arrhythmogenic right ventricular cardiomyopathy, maps to chromosome 2 long arm. Genomics 1997; 45:259-63. [PMID: 9344647 DOI: 10.1006/geno.1997.4927] [Citation(s) in RCA: 125] [Impact Index Per Article: 4.6] [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: 02/05/2023]
Abstract
Autosomal dominant arrhythmogenic right ventricular dysplasia (ARVD; MIM 107970) is a genetically heterogeneous cardiomyopathy, which often causes sudden death in juveniles and athletes. Two disease loci were previously mapped respectively to 14q23-q24 (ARVD1) and to 1q42-q43 (ARVD2). A third possible locus was assigned to 14q12-q22. We report here on a linkage study performed on three independent families with recurrence of ARVD characterized by localized involvement of the left ventricle. In these families the disease appears to be transmitted with three polymorphic DNA markers of the chromosome 2 long arm, showing a maximum lod score of 3.46 at theta = 0 for the marker D2S152. The multipoint linkage analysis suggests that the novel ARVD locus, provisionally named ARVD4, maps to 2q32. 1-q32.3, within the chromosomal region including markers D2S152, D2S103, and D2S389.
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Affiliation(s)
- A Rampazzo
- Department of Biology, University of Padua, Padua, I-35121, Italy
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Melacini P, Fanin M, Danieli GA, Villanova C, Martinello F, Miorin M, Freda MP, Miorelli M, Mostacciuolo ML, Fasoli G, Angelini C, Dalla Volta S. Myocardial involvement is very frequent among patients affected with subclinical Becker's muscular dystrophy. Circulation 1996; 94:3168-75. [PMID: 8989125 DOI: 10.1161/01.cir.94.12.3168] [Citation(s) in RCA: 125] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Several cases of Becker's muscular dystrophy (BMD) have been reported, which showed mild or subclinical skeletal muscle involvement with an overt dilated cardiomyopathy. Here, for the first time, a group of 28 patients with BMD who had a subclinical or benign myopathy have been studied through a thorough cardiological assessment. METHODS AND RESULTS Each patient underwent ECG and echocardiographic examinations. Molecular analyses of the dystrophin gene and protein were performed. An unexpectedly high incidence of myocardial involvement was observed among patients affected with subclinical (72%) or benign (60%) BMD. The cardiac involvement appears to develop early from the right ventricle. Both the increase in left ventricular end-diastolic volume and the reduction in the ejection fraction appeared to be age related. Severe left ventricular dilation with reduced ejection fraction, which could be complicated by life-threatening arrhythmias, may occur. Contrary to previous reports, which indicated the involvement of 5'-end mutations in cardiomyopathies as a result of dystrophin gene alterations, this study shows that despite the apparent concentration of deletions in two regions (5'-end and exons 47 through 49), no general conclusions can be drawn regarding the involvement of specific gene mutations in the development of cardiomyopathy. CONCLUSIONS Cardiomyopathy is the main clinical feature and complication in patients affected by subclinical or mild BMD. The cardiac manifestation is characterized by early right ventricular involvement and is later associated with left ventricular impairment. In mild BMD, myocardial damage may develop because the patients, who are unaware of a possible cardiac involvement, are still able to perform strenuous muscle exercise and, through pressure or volume overload, may induce mechanical stress, which is harmful for dystrophin-deficient myocardial cells.
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Affiliation(s)
- P Melacini
- Department of Cardiology, University of Padua, Italy
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10
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Todoroya A, Bronzova J, Miorin M, Rosa M, Kremensky I, Danieli GA. Mutation analysis in Duchenne and Becker muscular dystrophy patients from Bulgaria shows a peculiar distribution of breakpoints by intron. Am J Med Genet 1996; 65:40-3. [PMID: 8914739 DOI: 10.1002/(sici)1096-8628(19961002)65:1<40::aid-ajmg6>3.0.co;2-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
For the first time in Bulgaria, a deletion/duplication screening was performed on a group of 84 unrelated Duchenne/Becker muscular dystrophy patients, and the breakpoint distribution in the dystrophin gene was analyzed. Intragenic deletions were detected in 67.8% of patients, and intragenic duplications in 2.4%. A peculiar distribution of deletion breakpoints was found. Only 13.2% of the deletion breakpoints fell in the "classical" hot spot in intron 44, whereas the majority (> 54%) were located within the segment encompassing introns 45-51, which includes intron 50, the richest in breakpoints (16%) in the Bulgarian sample. Comparison with data from Greece and Turkey points at the probable existence of a deletion hot spot within intron 50, which might be a characteristic of populations of the Balkan region.
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Affiliation(s)
- A Todoroya
- Laboratory of Molecular Pathology, University Hospital of Obstetrics and Gynecology, Sofia, Bulgaria
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11
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Angelini C, Fanin M, Freda MP, Martinello F, Miorin M, Melacini P, Siciliano G, Pegoraro E, Rosa M, Danieli GA. Prognostic factors in mild dystrophinopathies. J Neurol Sci 1996; 142:70-8. [PMID: 8902723 DOI: 10.1016/0022-510x(96)00144-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [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: 02/02/2023]
Abstract
One hundred twenty five patients from 105 families were considered, showing in-frame intragenic deletion or duplication of the dystrophin gene and/or abnormal dystrophin on muscle biopsy. According to clinical status of patients, the affection was classified as subclinical, benign, moderate or severe. Significant decrease of dystrophin abundance was observed with increasing clinical severity (p < 0.05). Detailed clinical data were available in 68 patients in whom a long-term follow-up (6-39 years) was obtained. Functional performance at different ages and disease endpoints were recorded in order to analyze the rate of disease progression. We identified three different disease courses: stable, slow and rapid progression. We observed a significantly lower level of dystrophin and immunohistochemical score (p < 0.05 vs. the other courses) in patients with rapid course. Deletion or duplication in the 5' end of the gene was associated with poor prognosis. Prognosis was substantially better, showing a stable course, in patients with large deletions or duplications in the proximal rod region. These subjects often suffered from a cramps/myalgia syndrome or experienced rhabdomyolisis. Cardiac involvement was detected in 65% of cases. A significant increase of right ventricular volume was seen in all clinical groups (p < 0.05). A left ventricular dilation was observed in 25% and a decreased ejection fraction in 29% of our patients. The reduction of ejection fraction and the increase of left ventricular volume were age-related. Since sudden death may occur as a consequence of cardiomyopathy, severe left ventricular dysfunction in dystrophinopathic patients is another important adverse prognostic factor, although not always directly correlated with skeletal muscle impairment.
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Affiliation(s)
- C Angelini
- Department of Neurology, University of Padua, Italy
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Melacini P, Vianello A, Villanova C, Fanin M, Miorin M, Angelini C, Dalla Volta S. Cardiac and respiratory involvement in advanced stage Duchenne muscular dystrophy. Neuromuscul Disord 1996; 6:367-76. [PMID: 8938701 DOI: 10.1016/0960-8966(96)00357-4] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.0] [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: 02/03/2023]
Abstract
This study aimed to describe myocardial involvement, respiratory impairment and pulmonary blood flow abnormalities in advanced-stage Duchenne muscular dystrophy (DMD). Twenty-one wheelchair-bound patients, aged from 10 to 24 yr, underwent electrocardiographic and echocardiographic examination, conventional spirometry, diurnal arterial blood gas analysis, and nocturnal polysomnography (SaO2 monitoring). Diagnosis was confirmed by neurological examination, dystrophin analysis at protein and DNA level. Patients were classified into two groups: group A normoxemic (14 cases) and group B with nocturnal hypoxemia (seven cases). Group A was further split into two subgroups, one without, and one with, left ventricular dilation (A1 = nine patients, end diastolic volume (EDV) = 51 ml m-2, ejection fraction (EF) = 56 per cent; A2 = five patients, EDV = 112 ml m-2, EF = 32 per cent; P < 0.05). Left ventricular regional wall motion abnormalities were found in 55, 40, and 43 per cent of groups A1, A2, and B patients respectively. Analysis of pulsed Doppler pulmonary data highlighted a significant reduction in corrected time to peak velocity in group B patients, when compared with control, A1, and A2 groups respectively. In group A, we observed a direct correlation between ejection fraction and corrected time-to-peak velocity. Two patterns of cardiac involvement may be recognized in advanced-stage DMD: left ventricular wall motion abnormalities and dilated cardiomyopathy. Doppler data which could suggest pulmonary hypertension may be observed in patients with dilated cardiomyopathy, and in patients with nocturnal hypoxemia. Therefore, in the management of advanced-stage DMD, a careful diagnosis of the heart-lung relationship should be performed, and both conventional treatment of heart failure and ventilatory therapy are necessary to improve the quality of life and survival in these patients.
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Affiliation(s)
- P Melacini
- Department of Cardiology, University of Padua, Italy
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Mostacciuolo ML, Miorin M, Martinello F, Angelini C, Perini P, Trevisan CP. Genetic epidemiology of congenital muscular dystrophy in a sample from north-east Italy. Hum Genet 1996; 97:277-9. [PMID: 8786062 DOI: 10.1007/bf02185752] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.6] [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: 02/02/2023]
Abstract
Congenital muscular dystrophy (CMD) is a heterogeneous disease with autosomic recessive transmission. In an epidemiological study in four provinces of Veneto (region of 2 586 830 inhabitants in north-east Italy), the recorded incidence rate for the period 1979-1993 was 4.65 x 10(-5); the prevalence rate in the year 1993 was 6.8x10(-6). The incidence and the prevalence rates that we have obtained during the course of our investigation represent the first estimates for CMD in Europe and show that this myopathy is among the most frequent neuromuscular diseases with autosomic recessive transmission.
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Affiliation(s)
- M L Mostacciuolo
- Laboratorio di Genetica Umana, Dipartimento di Biologia, Università diPadova, Italy
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Toscano A, Vitiello L, Comi GP, Galvagni F, Miorin M, Prelle A, Fortunato F, Bardoni A, Mora M, Fiumara A. Duplication of dystrophin gene and dissimilar clinical phenotype in the same family. Neuromuscul Disord 1995; 5:475-81. [PMID: 8580729 DOI: 10.1016/0960-8966(95)00008-b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 01/31/2023]
Abstract
We report here three related patients with a duplication of exons 19-41 of the dystrophin gene, having dissimilar clinical phenotype and dystrophin immunohistochemistry. Two brothers aged six and three years had myalgia, proximal muscular weakness and hypertrophic calves, with 10- 20-fold increase of serum creatine kinase. Muscle biopsy showed dystrophic changes and reduced, patchy binding of dystrophin. The clinical and laboratory findings were consistent with a diagnosis of Becker muscular dystrophy with early onset. Their 14-year-old cousin had only mild hyperCKemia. His muscle biopsy was normal with only mild reduction of dystrophin immunostaining. At follow-up, he is still without symptoms and signs at age 19. All three patients had the same gene duplication and an increased dystrophin size of 507 kDa. Expression of the dystrophin-associated glycoproteins adhalin, alpha-dystroglycan, and beta-dystroglycan were normal in the three patients. An intrafamilial variability in patients carrying a partial duplication of the dystrophin gene may be related to a quantitative difference in mRNA.
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Affiliation(s)
- A Toscano
- Clinica Neurologica 2, University of Messina, Italy
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Fanin M, Danieli GA, Cadaldini M, Miorin M, Vitiello L, Angelini C. Dystrophin-positive fibers in Duchenne dystrophy: origin and correlation to clinical course. Muscle Nerve 1995; 18:1115-20. [PMID: 7659105 DOI: 10.1002/mus.880181007] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.7] [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: 01/26/2023]
Abstract
In 132 DMD muscle biopsies we investigated the presence of dystrophin-positive fibers and the relationship of dystrophin immunohistochemical pattern to the clinical severity of the disease. Reverted fibers were detected in 37% of patients; their prevalence increased significantly in each biopsy with age of patients. We suggest that reversion occurs in satellite cells, when muscle differentiation is completed. The longitudinal extent of dystrophin-positive domain spans a maximum length of 900 microns. No correlation was found between the presence of reverted fibers and the clinical severity of DMD, whereas a milder form of Duchenne dystrophy was observed in patients showing a faint reaction in all fibers. The occurrence of reverted fibers is independent of the type of gene mutation; however, a higher proportion of cases with reverted fibers was found among patients with gene duplications.
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Affiliation(s)
- M Fanin
- Department of Neurology, University of Padova, Italy
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Siciliano G, Fanin M, Angelini C, Pollina LE, Miorin M, Saad FA, Freda MP, Muratorio A. Prevalent cardiac involvement in dystrophin Becker type mutation. Neuromuscul Disord 1994; 4:381-6. [PMID: 7981595 DOI: 10.1016/0960-8966(94)90074-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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
Myocardial involvement is frequently present in Xp21-linked muscular dystrophy, due to a lack of dystrophin in cardiac fibres. We describe a 41-yr-old man affected by dilated cardiomyopathy with sporadic episodes of myoglobinuria induced by effort and increased levels of serum creatine kinase. Very mild signs of skeletal myopathy were clinically evident. His mother was affected by an indefinite cardiopathy and suddenly died when she was 36 yr old. Muscle biopsy of the patient showed a dystrophic process. Dystrophin analysis together with a genetic DMD locus study led us to diagnose Becker type muscular dystrophy, with truncated dystrophin and a gene deletion extending from exon 45 to 48. Prevalent cardiac involvement in a Becker type mutation of the dystrophin gene further confirms clinical variability of dystrophinopathies.
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Affiliation(s)
- G Siciliano
- Institute of Neurology Clinic, University of Pisa, Italy
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17
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Galvagni F, Saad FA, Danieli GA, Miorin M, Vitiello L, Mostacciuolo ML, Angelini C. A study on duplications of the dystrophin gene: evidence of a geographical difference in the distribution of breakpoints by intron. Hum Genet 1994; 94:83-7. [PMID: 8034300 DOI: 10.1007/bf02272848] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [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
Starting from a group of 265 Italian patients affected with Duchenne or Becker muscular dystrophy a screening for duplications in the dystrophin gene was performed on 112 cases in which no deletions had previously been detected. The 21 intragenic duplications detected account for 7.9% of the total. Among these, one duplication including exons from 3 to 43 is the largest reported so far. Data from this study were combined with those from the literature and breakpoint distribution by intron was analysed. In general breakpoints occur mostly in the proximal third of the gene, in particular in intron 7. However, both the frequency of duplications and the distribution of breakpoints by intron are different in the Japanese sample compared with the other groups of patients. The role of geographical differentiation of intron sequences by genetic drift and of transposon-like sequences in explaining these differences is discussed.
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Affiliation(s)
- F Galvagni
- Department of Biology, University of Padua, Italy
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Mostacciuolo ML, Miorin M, Vitiello L, Rampazzo A, Fanin M, Angelini C, Danieli GA. Occurrence of two different intragenic deletions in two male relatives affected with Duchenne muscular dystrophy. Am J Med Genet 1994; 50:84-6. [PMID: 8160758 DOI: 10.1002/ajmg.1320500118] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The occurrence of 2 different intragenic deletions (exons 10-44 and exon 45, respectively) is reported in 2 male relatives affected with Duchenne muscular dystrophy, both showing the same haplotype for DNA markers not included in the deleted segment. The 2 different deletions seem to have occurred independently in the same X chromosome. This finding, together with other reports, suggests possibly an increased predisposition to mutations within the DMD locus in some families. Therefore, when dealing with prenatal diagnosis, the investigation on fetal DNA cannot be restricted only to the region in which a mutation was previously identified in the family.
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Mostacciuolo ML, Miorin M, Pegoraro E, Fanin M, Schiavon F, Vitiello L, Saad FA, Angelini C, Danieli GA. Reappraisal of the incidence rate of Duchenne and Becker muscular dystrophies on the basis of molecular diagnosis. Neuroepidemiology 1993; 12:326-30. [PMID: 8309507 DOI: 10.1159/000110334] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [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: 01/29/2023] Open
Abstract
The incidence rates of Duchenne and Becker muscular dystrophies (X-linked recessive) in a given sample of the Italian population were recalculated using the results of DNA and dystrophin analysis. While the incidence rate of Duchenne muscular dystrophy remained unchanged, the new figure for the incidence of Becker muscular dystrophy (7.2 per 100,000 male live births) was much higher than previously reported, since molecular diagnosis revealed additional cryptic cases, but this incidence is still an underestimate.
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