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Aquila I, Sacco MA, Cordasco F, Ricci P. Forensic case of a pregnant woman with Marfan syndrome. BMJ Case Rep 2020; 13:13/12/e229959. [PMID: 33370936 DOI: 10.1136/bcr-2019-229959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Isabella Aquila
- University Magna Graecia of Catanzaro, Institute of Legale Medicine, Catanzaro, Italy
| | - Matteo Antonio Sacco
- University Magna Graecia of Catanzaro, Institute of Legale Medicine, Catanzaro, Italy
| | - Fabrizio Cordasco
- University Magna Graecia of Catanzaro, Institute of Legale Medicine, Catanzaro, Italy
| | - Pietrantonio Ricci
- University Magna Graecia of Catanzaro, Institute of Legale Medicine, Catanzaro, Italy
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Fuster-García C, García-García G, Jaijo T, Fornés N, Ayuso C, Fernández-Burriel M, Sánchez-De la Morena A, Aller E, Millán JM. High-throughput sequencing for the molecular diagnosis of Usher syndrome reveals 42 novel mutations and consolidates CEP250 as Usher-like disease causative. Sci Rep 2018; 8:17113. [PMID: 30459346 PMCID: PMC6244211 DOI: 10.1038/s41598-018-35085-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 10/17/2018] [Indexed: 01/09/2023] Open
Abstract
Usher syndrome is a rare disorder causing retinitis pigmentosa, together with sensorineural hearing loss. Due to the phenotypic and genetic heterogeneity of this disease, the best method to screen the causative mutations is by high-throughput sequencing. In this study, we tested a semiconductor chip based sequencing approach with 77 unrelated patients, as a molecular diagnosis routine. In addition, Multiplex Ligation-dependent Probe Amplification and microarray-based Comparative Genomic Hybridization techniques were applied to detect large rearrangements, and minigene assays were performed to confirm the mRNA processing aberrations caused by splice-site mutations. The designed panel included all the USH causative genes (MYO7A, USH1C, CDH23, PCDH15, USH1G, CIB2, USH2A, ADGRV1, WHRN and CLRN1) as well as four uncertainly associated genes (HARS, PDZD7, CEP250 and C2orf71). The outcome showed an overall mutation detection ratio of 82.8% and allowed the identification of 42 novel putatively pathogenic mutations. Furthermore, we detected two novel nonsense mutations in CEP250 in a patient with a disease mimicking Usher syndrome that associates visual impairment due to cone-rod dystrophy and progressive hearing loss. Therefore, this approach proved reliable results for the molecular diagnosis of the disease and also allowed the consolidation of the CEP250 gene as disease causative for an Usher-like phenotype.
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Affiliation(s)
- Carla Fuster-García
- Grupo de Investigación en Biomedicina Molecular, Celular y Genómica, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, Spain
| | - Gema García-García
- Grupo de Investigación en Biomedicina Molecular, Celular y Genómica, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, Spain.
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain.
| | - Teresa Jaijo
- Grupo de Investigación en Biomedicina Molecular, Celular y Genómica, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, Spain
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain
- Unidad de Genética y Diagnóstico Prenatal, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Neus Fornés
- Grupo de Investigación en Biomedicina Molecular, Celular y Genómica, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, Spain
| | - Carmen Ayuso
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain
- Servicio de Genética, Fundación Jiménez Díaz, University Hospital, Instituto de Investigación Sanitaria Fundación Jiménez Díaz IIS-FJD, UAM, Madrid, Spain
| | | | | | - Elena Aller
- Grupo de Investigación en Biomedicina Molecular, Celular y Genómica, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, Spain
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain
- Unidad de Genética y Diagnóstico Prenatal, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - José M Millán
- Grupo de Investigación en Biomedicina Molecular, Celular y Genómica, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, Spain
- CIBER de Enfermedades Raras (CIBERER), Madrid, Spain
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Zhang M, Zhou Y, Peng Y, Jin L. Two rare missense mutations in the fibrillin‑1 gene associated with atypical cardiovascular manifestations in a Chinese patient affected by Marfan syndrome. Mol Med Rep 2018; 18:877-881. [PMID: 29845260 PMCID: PMC6059719 DOI: 10.3892/mmr.2018.9041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 03/21/2017] [Indexed: 12/03/2022] Open
Abstract
The present report aimed to evaluate the results of screen mutations of the fibrillin (FBN) 1 gene and analyze the symptoms in one Chinese patient clinically diagnosed with Marfan syndrome (MFS). Clinical data were collected and FBN1 gene sequencing was performed. Genomic DNA was extracted from the blood sample of the patient. All 65 exons were screened using a polymerase chain reaction assay. The diagnosis of MFS was confirmed via identification of symptoms presenting in the skeletal system (arachnodactyly, walker wrist and thumb signs) and the ocular system (ectopia lentis), in addition to a positive family history. The patient's cardiovascular manifestations (dilatation of the four cardiac chambers, severe mitral valve regurgitation and a large saccular aneurysm of the non-coronary sinus of Valsalva) were atypical to those that most frequently occur in cases of MFS. Following gene sequencing, two novel heterozygous mutations of the FBN-1 gene were identified: c.3442C>G in exon 27, proline replaced with alanine (p. Pro1148Ala) and c.6388G>A in exon 52, glutamic acid replaced with lysine (p. Glu2130Lys). The clinical symptoms and family history were important in the diagnosis of MFS, however the atypical signs that presented in the cardiovascular system may be associated with the disease, and may be noted for further cases in the future. Gene sequencing further verified the correct diagnosis of MFS.
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Affiliation(s)
- Miao Zhang
- Department of Cardiology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Yaqi Zhou
- Department of Cardiology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Yang Peng
- Department of Cardiology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Lijun Jin
- Department of Cardiology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
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Qiao J, Zhu F, Xu L, Liu Z, Sun X, Qian B, Jiang Q, Zhu Z, Qiu Y. Accuracy of pedicle screw placement in patients with Marfan syndrome. BMC Musculoskelet Disord 2017; 18:123. [PMID: 28327138 PMCID: PMC5361807 DOI: 10.1186/s12891-017-1490-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/14/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There is no study concerning safety and accuracy of pedicle screw placement in Marfan syndrome. The objective of this study is to investigate accuracy and safety of pedicle screw placement in scoliosis associated with Marfan syndrome. METHODS CT scanning was performed to analyze accuracy of pedicle screw placement. Pedicle perforations were classified as medial, lateral or anterior and categorized to four grades: ≤ 2 mm as Grade 1, 2.1-4.0 mm as Grade 2, 4.1-6.0 mm as Grade 3, ≥6.1 mm as Grade 4. Fully contained screws or with medial wall perforation ≤ 2 mm or with lateral wall perforation ≤ 6 mm and without injury of visceral organs were considered acceptable, otherwise were unacceptable. RESULTS 976 pedicle screws were placed, 713 screws (73.1%) were fully contained within the cortical boundaries of the pedicle. 924 (94.7%) screws were considered as acceptable, and 52 (5.3%) as unacceptable. The perforation rate was higher using free-hand technique than O-arm navigation technique (30.8% VS. 11.4%, P < 0.05), higher in lumbar region than in thoracic region (34.1% VS. 22.3%, P < 0.05) and higher in concave side than in convex side (33.5% VS. 21.9%, P < 0.05). No injury of visceral organs especially aorta erosion was noted in the series. 7 cases of dural tear caused by misplaced screws occurred, and 4 cases developed cerebro-spinal fluid leak. Drainage and pressure dressings were applied for these patients, and no infection was observed. Leg pain was observed in 7 cases, and 2 cases simultaneously complained of leg weakness. Revision surgery was conducted to remove the misplaced screws for these 2 patients. Conservative treatment was applied for the 5 patients without leg weakness. Symptoms of leg weakness and pain resolved in all patients. CONCLUSION Placement of pedicle screw in Marfan syndrome is accuracy and safe. O-arm navigation was an effective modality to ensure the safety and accuracy of screw placement. Special attention should be paid when screws were placed at the lumber spine and the concave side of spine deformity to avoid the higher rate of complications.
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Affiliation(s)
- Jun Qiao
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
| | - Feng Zhu
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
| | - Leilei Xu
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
| | - Zhen Liu
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
| | - Xu Sun
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
| | - Bangping Qian
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
| | - Qing Jiang
- Department of Orthopedics, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zezhang Zhu
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China.
| | - Yong Qiu
- Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, China
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Surgical treatment of scoliosis in Marfan syndrome: outcomes and complications. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2016; 25:3288-3293. [DOI: 10.1007/s00586-016-4579-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 04/23/2016] [Accepted: 04/23/2016] [Indexed: 10/21/2022]
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Engineered mutations in fibrillin-1 leading to Marfan syndrome act at the protein, cellular and organismal levels. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2015; 765:7-18. [DOI: 10.1016/j.mrrev.2015.04.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/22/2015] [Accepted: 04/27/2015] [Indexed: 11/19/2022]
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Franken R, Heesterbeek TJ, de Waard V, Zwinderman AH, Pals G, Mulder BJM, Groenink M. Diagnosis and genetics of Marfan syndrome. Expert Opin Orphan Drugs 2014. [DOI: 10.1517/21678707.2014.950223] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Aparisi MJ, García-García G, Aller E, Sequedo MD, Martínez-Fernández de la Cámara C, Rodrigo R, Armengot M, Cortijo J, Milara J, Díaz-LLopis M, Jaijo T, Millán JM. Study of USH1 splicing variants through minigenes and transcript analysis from nasal epithelial cells. PLoS One 2013; 8:e57506. [PMID: 23451239 PMCID: PMC3581446 DOI: 10.1371/journal.pone.0057506] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 01/22/2013] [Indexed: 11/18/2022] Open
Abstract
Usher syndrome type I (USH1) is an autosomal recessive disorder characterized by congenital profound deafness, vestibular areflexia and prepubertal retinitis pigmentosa. The first purpose of this study was to determine the pathologic nature of eighteen USH1 putative splicing variants found in our series and their effect in the splicing process by minigene assays. These variants were selected according to bioinformatic analysis. The second aim was to analyze the USH1 transcripts, obtained from nasal epithelial cells samples of our patients, in order to corroborate the observed effect of mutations by minigenes in patient’s tissues. The last objective was to evaluate the nasal ciliary beat frequency in patients with USH1 and compare it with control subjects. In silico analysis were performed using four bioinformatic programs: NNSplice, Human Splicing Finder, NetGene2 and Spliceview. Afterward, minigenes based on the pSPL3 vector were used to investigate the implication of selected changes in the mRNA processing. To observe the effect of mutations in the patient’s tissues, RNA was extracted from nasal epithelial cells and RT-PCR analyses were performed. Four MYO7A (c.470G>A, c.1342_1343delAG, c.5856G>A and c.3652G>A), three CDH23 (c.2289+1G>A, c.6049G>A and c.8722+1delG) and one PCDH15 (c.3717+2dupTT) variants were observed to affect the splicing process by minigene assays and/or transcripts analysis obtained from nasal cells. Based on our results, minigenes are a good approach to determine the implication of identified variants in the mRNA processing, and the analysis of RNA obtained from nasal epithelial cells is an alternative method to discriminate neutral Usher variants from those with a pathogenic effect on the splicing process. In addition, we could observe that the nasal ciliated epithelium of USH1 patients shows a lower ciliary beat frequency than control subjects.
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Affiliation(s)
- María José Aparisi
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
| | - Gema García-García
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
| | - Elena Aller
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
- Biomedical Network Research Center for Rare Diseases, Valencia, Spain
| | - María Dolores Sequedo
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
| | | | - Regina Rodrigo
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
| | - Miguel Armengot
- Rhinology Unit, General and University Hospital, Medical School, Valencia University, Valencia, Spain
| | - Julio Cortijo
- Research Foundation of the University General Hospital of Valencia, Valencia, Spain
- Biomedical Network Research Center for Respiratory Diseases, Valencia, Spain
- University of Valencia, Valencia, Spain
| | - Javier Milara
- Biomedical Network Research Center for Respiratory Diseases, Valencia, Spain
- Clinical Pharmacology Unit, University Clinic Hospital, Valencia, Spain
- Research Unit, University General Hospital Consortium, Valencia, Spain
| | - Manuel Díaz-LLopis
- Department of Ophthalmology, La Fe University Hospital, Medical School, Valencia University, Valencia, Spain
| | - Teresa Jaijo
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
- Biomedical Network Research Center for Rare Diseases, Valencia, Spain
- * E-mail:
| | - José María Millán
- Research Group on Sensorineural Diseases, Instituto de Investigación Sanitaria - La Fe, Valencia, Spain
- Biomedical Network Research Center for Rare Diseases, Valencia, Spain
- Genetics Unit, La Fe University Hospital, Valencia, Spain
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Bonnet C, Grati M, Marlin S, Levilliers J, Hardelin JP, Parodi M, Niasme-Grare M, Zelenika D, Délépine M, Feldmann D, Jonard L, El-Amraoui A, Weil D, Delobel B, Vincent C, Dollfus H, Eliot MM, David A, Calais C, Vigneron J, Montaut-Verient B, Bonneau D, Dubin J, Thauvin C, Duvillard A, Francannet C, Mom T, Lacombe D, Duriez F, Drouin-Garraud V, Thuillier-Obstoy MF, Sigaudy S, Frances AM, Collignon P, Challe G, Couderc R, Lathrop M, Sahel JA, Weissenbach J, Petit C, Denoyelle F. Complete exon sequencing of all known Usher syndrome genes greatly improves molecular diagnosis. Orphanet J Rare Dis 2011; 6:21. [PMID: 21569298 PMCID: PMC3125325 DOI: 10.1186/1750-1172-6-21] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2010] [Accepted: 05/11/2011] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Usher syndrome (USH) combines sensorineural deafness with blindness. It is inherited in an autosomal recessive mode. Early diagnosis is critical for adapted educational and patient management choices, and for genetic counseling. To date, nine causative genes have been identified for the three clinical subtypes (USH1, USH2 and USH3). Current diagnostic strategies make use of a genotyping microarray that is based on the previously reported mutations. The purpose of this study was to design a more accurate molecular diagnosis tool. METHODS We sequenced the 366 coding exons and flanking regions of the nine known USH genes, in 54 USH patients (27 USH1, 21 USH2 and 6 USH3). RESULTS Biallelic mutations were detected in 39 patients (72%) and monoallelic mutations in an additional 10 patients (18.5%). In addition to biallelic mutations in one of the USH genes, presumably pathogenic mutations in another USH gene were detected in seven patients (13%), and another patient carried monoallelic mutations in three different USH genes. Notably, none of the USH3 patients carried detectable mutations in the only known USH3 gene, whereas they all carried mutations in USH2 genes. Most importantly, the currently used microarray would have detected only 30 of the 81 different mutations that we found, of which 39 (48%) were novel. CONCLUSIONS Based on these results, complete exon sequencing of the currently known USH genes stands as a definite improvement for molecular diagnosis of this disease, which is of utmost importance in the perspective of gene therapy.
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Affiliation(s)
- Crystel Bonnet
- Unité de Génétique Médicale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
| | - M'hamed Grati
- Unité de Génétique Médicale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
- NIDCD, NIH, Bethesda, MD 20894, USA
| | - Sandrine Marlin
- Unité de Génétique Médicale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Jacqueline Levilliers
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
| | - Jean-Pierre Hardelin
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
| | - Marine Parodi
- Service de Biochimie et de Biologie Moléculaire, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, AP-HP, Paris, France
| | - Magali Niasme-Grare
- Service de Biochimie et de Biologie Moléculaire, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, AP-HP, Paris, France
| | | | | | - Delphine Feldmann
- Unité de Génétique Médicale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Service de Biochimie et de Biologie Moléculaire, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, AP-HP, Paris, France
| | - Laurence Jonard
- Unité de Génétique Médicale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Service de Biochimie et de Biologie Moléculaire, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, AP-HP, Paris, France
| | - Aziz El-Amraoui
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
| | - Dominique Weil
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
| | - Bruno Delobel
- Centre de Génétique, Hôpital St-Antoine, Lille, France
| | | | - Hélène Dollfus
- Service de Génétique médicale, Hôpital de Hautepierre, Strasbourg, France
| | | | - Albert David
- Service de Génétique, Hôtel Dieu, Nantes, France
| | | | | | | | - Dominique Bonneau
- Centre de Référence des Maladies Neurogénétiques, Centre Hospitalier Universitaire d'Angers, France
| | - Jacques Dubin
- Service ORL, Centre Hospitalier Universitaire d'Angers, France
| | | | | | | | - Thierry Mom
- Service ORL, Hôtel-Dieu, Clermont-Ferrand, France
| | - Didier Lacombe
- Centre de Génétique, Hôpital Pellegrin, Bordeaux, France
| | | | | | | | - Sabine Sigaudy
- Service de Génétique Médicale, Hôpital de la Timone, Marseille, France
| | - Anne-Marie Frances
- Service de Génétique Médicale, Hôpital intercommunal de Font-Pré, Toulon La Seyne sur Mer, France
| | - Patrick Collignon
- Service de Génétique Médicale, Hôpital intercommunal de Font-Pré, Toulon La Seyne sur Mer, France
| | - Georges Challe
- Departement d'Ophtalmologie et de Médecine Interne, Hôpital de la Salpêtrière, AP-HP, France
| | - Rémy Couderc
- Unité de Génétique Médicale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Service de Biochimie et de Biologie Moléculaire, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, AP-HP, Paris, France
| | - Mark Lathrop
- Centre National de Génotypage, CEA, Evry, France
| | | | - Jean Weissenbach
- CEA, DSV, IG, Genoscope, CNRS-UMR 8030, UEVE, Université d'Evry, Evry, France
| | - Christine Petit
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
- Collège de France, Paris, France
| | - Françoise Denoyelle
- Unité de Génétique et Physiologie de l'Audition, INSERM UMRS 587, UPMC, Institut Pasteur, Paris, France
- Service d'ORL et de Chirurgie Cervico-faciale, INSERM UMRS 587, Hôpital d'Enfants Armand-Trousseau, AP-HP, UPMC, Paris, France
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Söylen B, Hinz K, Prokein J, Becker H, Schmidtke J, Arslan-Kirchner M. Performance of a new quantitative method for assessing dural ectasia in patients with FBN1 mutations and clinical features of Marfan syndrome. Neuroradiology 2009; 51:397-400. [PMID: 19225772 DOI: 10.1007/s00234-009-0508-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Accepted: 02/02/2009] [Indexed: 10/21/2022]
Abstract
INTRODUCTION This study presents a comparison of established methods for measuring dural ectasia with a new quantitative method of assessing this clinical feature. METHODS Seventeen patients with an identified mutation in FBN1 were examined for dural ectasia. The results were compared with 17 age- and sex-matched controls. Our images were also evaluated using the two methods of quantifying dural ectasia, namely those of Ahn et al. and of Oosterhof et al. RESULTS With our method, 80% MFS1 patients and 7% controls fulfilled the criterion for dural ectasia. Using the method of Oosterhof et al., dural ectasia was found in 88% patients with MFS1 and in 47% controls. Using the method of Ahn et al. 76% patients with Marfan syndrome and 29% controls showed dural ectasia. CONCLUSION We present a novel quantitative method of evaluating MRT images for dural ectasia, which, in our own patient cohort, performed better than those previously described.
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Affiliation(s)
- Bahar Söylen
- Institute of Human Genetics, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany
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Rommel K, Karck M, Haverich A, von Kodolitsch Y, Rybczynski M, Müller G, Singh KK, Schmidtke J, Arslan-Kirchner M. Identification of 29 novel and nine recurrent fibrillin-1 (FBN1) mutations and genotype-phenotype correlations in 76 patients with Marfan syndrome. Hum Mutat 2006; 26:529-39. [PMID: 16220557 DOI: 10.1002/humu.20239] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Marfan syndrome (MFS) is an autosomal-dominant disorder of the fibrous connective tissue that is typically caused by mutations in the gene coding for fibrillin-1 (FBN1), a major component of extracellular microfibrils. The clinical spectrum of MFS is highly variable and includes involvement of the cardiovascular, skeletal, ocular, and other organ systems; however, the genotype-phenotype correlations have not been well developed. Various screening methods have led to the identification of about 600 different mutations (FBN1-UMD database; www.umd.be). In this study we performed SSCP and/or direct sequencing to analyze all 65 exons of the FBN1 gene in 116 patients presenting with classic MFS or related phenotypes. Twenty-nine novel and nine recurrent mutations were identified in 38 of the analyzed patients. The mutations comprised 18 missense (47%), eight nonsense (21%), and five splice site (13%) mutations. Seven further mutations (18%) resulted from deletion, insertion, or duplication events, six of which led to a frameshift and subsequent premature termination. Additionally, we describe new polymorphisms and sequence variants. On the basis of the data presented here and in a previous study, we were able to establish highly significant correlations between the FBN1 mutation type and the MFS phenotype in a group of 76 mutation-positive patients for whom comprehensive clinical data were available. Most strikingly, there was a significantly lower incidence of ectopia lentis in patients who carried a mutation that led to a premature termination codon (PTC) or a missense mutation without cysteine involvement in FBN1, as compared to patients whose mutations involved a cysteine substitution or splice site alteration.
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Affiliation(s)
- Kathrin Rommel
- Institute of Human Genetics, Medizinische Hochschule Hannover, Hannover, Germany
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Mátyás G, De Paepe A, Halliday D, Boileau C, Pals G, Steinmann B. Evaluation and application of denaturing HPLC for mutation detection in Marfan syndrome: Identification of 20 novel mutations and two novel polymorphisms in the FBN1 gene. Hum Mutat 2002; 19:443-56. [PMID: 11933199 DOI: 10.1002/humu.10054] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Mutations in the human fibrillin 1 gene (FBN1) cause the Marfan syndrome (MFS), an autosomal dominant connective tissue disorder. Knowledge about FBN1 mutations is important for early diagnosis, management, and genetic counseling. However, mutation detection in FBN1 is a challenge because the gene is very large in size ( approximately 200 kb) and the approximately 350 mutations detected so far are scattered over 65 exons. Conventional methods for large-scale detection of mutations are expensive, technically demanding, or time consuming. Recently, a high-capacity low-cost mutation detection method was introduced based on denaturing high-performance liquid chromatography (DHPLC). To assess the sensitivity and specificity of this method, we blindly screened 64 DNA samples of known FBN1 genotype exon-by-exon using exon-specific DHPLC conditions. Analysis of 682 PCR amplicons correctly identified 62 out of 64 known sequence variants. In three MFS patients of unknown FBN1 genotype, we detected two mutations and eight polymorphisms. Overall, 20 mutations and two polymorphisms are described here for the first time. Our results demonstrate 1) that DHPLC is a highly sensitive (89-99%, P = 0.05) method for FBN1 mutation detection; but 2) that chromatograms with moderate and weak pattern abnormalities also show false positive signals (in all 45-59%, P = 0.05); 3) that the difference in the chromatograms of heterozygous and homozygous amplicons is mostly independent of the type of sequence change; and 4) that DHPLC column conditions, additional base changes, and the amounts of injected PCR products influence significantly the shape of chromatograms. A strategy for FBN1 mutation screening is discussed.
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Affiliation(s)
- Gábor Mátyás
- University Children's Hospital, Division of Metabolism and Molecular Pediatrics, Zurich, Switzerland
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