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Pourtau L, Beneyto M, Porterie J, Roncalli J, Massot M, Biendel C, Fournier P, Itier R, Galinier M, Lairez O, Delmas C. Prevalence, management and outcomes of haemorrhagic events in left ventricular assist device recipients. Archives of Cardiovascular Diseases Supplements 2023. [DOI: 10.1016/j.acvdsp.2022.10.085] [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: 12/31/2022]
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2
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Beneyto M, Ghyaza G, Cariou E, Amar J, Lairez O. Development and validation of machine learning algorithms to predict left ventricular hypertrophy etiology. Archives of Cardiovascular Diseases Supplements 2023. [DOI: 10.1016/j.acvdsp.2022.10.210] [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: 12/31/2022]
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3
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Marimpouy N, Beneyto M, Foltran D, Delasnerie H, Mondoly P, Mandel F, Delmas C, Rollin A, Guilbaud Frugier C, Maury P. Causes of resuscitated sudden cardiac death over 10 years in a large population of consecutive patients. Archives of Cardiovascular Diseases Supplements 2023. [DOI: 10.1016/j.acvdsp.2022.10.255] [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: 01/01/2023]
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4
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Maury P, Delasnerie H, Sauve R, Beneyto M, Domain G, Voglimacci Q, Waintraub X, Mondoly P, Rollin A, Gandjbakhch E. Correlations between endocardial voltage mapping, diagnosis and genetic in patients with arrhythmogenic right ventricular cardiomyopathy. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.662] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The relations between voltage mapping and diagnosis or genetic background of patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) have not been investigated so far.
Objective
To investigate if diagnosis or genetic background were linked to voltage mapping in ARVC.
Method
97 patients with proved or suspected ARVC undergoing 3D endocardial mapping and genetic testing have been retrospectively included. Presence, localisation and extension of low voltage areas were correlated to ARVC diagnosis and presence of a culprit mutation.
Results
68 patients (70%) fulfilled ARVC diagnosis according to the Task Force criteria and 43 (44%) had ARVC-causal mutations. 78 (80%) presented with some bipolar or unipolar endocardial scar. 60/ 78 patients with endocardial scar (77%) fulfilled the criteria for a definitive ARVC diagnosis versus 8/19 patients without scar (42%) (p=0.003).
In the 68 patients with a definitive diagnosis of ARVC, the presence of endocardial scar was similar whether an ARVC-causal mutation was present or not (35/40 vs 25/28, p=ns). While there was slightly more infero-lateral scars in patients carrying a pathogenic genetic variant (34/40 vs 18/28, p=0.04), there was no difference for right ventricular outflow tract (24/40 vs 17/28) and apical scars (12/40 vs 11/28) or for multiple scars (26/35 vs 14/25 patients with scars). Scar extension was greater in patients with pathogenic variants (bipolar 12±10 vs 6±10%, p=0.02, and unipolar 22±13 vs 12±15%, p=0.01).
Conclusion
3D endocardial mapping could have an important role for refining ARVC diagnosis. Trends for larger and more infero-lateral scars were observed in mutated patients, without difference according to the mutated genes.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- P Maury
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
| | - H Delasnerie
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
| | | | - M Beneyto
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
| | - G Domain
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
| | - Q Voglimacci
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
| | | | - P Mondoly
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
| | - A Rollin
- University Hospital of Toulouse - Rangueil Hospital , Toulouse , France
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5
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Delasnerie H, Mandel F, Beneyto M, Domain G, Voglimacci Q, Mondoly P, Rollin A, Maury P. Hemodynamical consequences and tolerance of ventricular tachycardia: A catheterization study. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2021.09.186] [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: 12/01/2022]
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6
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Fernández-Cancio M, Audí L, Andaluz P, Torán N, Piró C, Albisu M, Gussinyé M, Yeste D, Clemente M, Martínez-Mora J, Blanco A, Granada ML, Marco M, Ferragut J, López-Siguero JP, Beneyto M, Carles C, Carrascosa A. SRD5A2 gene mutations and polymorphisms in Spanish 46,XY patients with a disorder of sex differentiation. ACTA ACUST UNITED AC 2011; 34:e526-35. [PMID: 21631525 DOI: 10.1111/j.1365-2605.2010.01136.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One hundred and forty-six index patients with 46,XY DSD in whom gonads were confirmed as testes were consecutively studied for a molecular diagnosis during the period 2002-2010. AR gene was analysed in all patients as the first candidate gene, yielding a mutation in 42.5% of cases and SRD5A2 gene was analysed as the second candidate gene, resulting in the characterization of 10 different mutations (p.Y91D, p.G115D, p.Q126R, p.R171S, p.Y188CfsX9, p.N193S, p.A207D, p.F219SfsX60, p.R227Q and p.R246W) in nine index patients (6.2% of the total number of 46,XY DSD patients). One of the mutations (p.Y188CfsX9) has never been reported. In addition, we genotyped SRD5A2 gene p.V89L and c.281+15T>C polymorphisms in 46,XY DSD and in 156 normal adult males and found that patients with SRD5A2 mutations or without a known molecular diagnosis presented a higher frequency of homozygous p.L89, homozygous TT and combined CCTT genotypes compared with controls. This result suggests that 46,XY DSD patient phenotypes may be influenced by SRD5A2 polymorphism genotypes. SRD5A2 gene mutations may not be as infrequent as previously considered in 46,XY DSD patients with variable degrees of external genitalia virilization at birth and normal T production and appears to be the second aetiology in our series.
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Affiliation(s)
- M Fernández-Cancio
- Unidad Investigación Endocrinología y Nutrición Pediátricas, Institut de Recerca, Hospital Vall d'Hebron, CIBERER (Centro de Investigación Biomédica en Red), Instituto de Salud Carlos III, Universitat Autònoma de Barcelona, Barcelona, Spain.
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7
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Simón Gozalbo A, Beneyto M, Rodríguez-Luna D, Vilar Ventura RM, Belenguer Benavides A, Geffner Sclarsky D. Familial multiple cavernomatosis: description of a new mutation. Neurologia 2010; 26:184-6. [PMID: 21163227 DOI: 10.1016/j.nrl.2010.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Revised: 06/11/2010] [Accepted: 06/20/2010] [Indexed: 11/20/2022] Open
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8
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Audi L, Fernández-Cancio M, Carrascosa A, Andaluz P, Torán N, Piró C, Vilaró E, Vicens-Calvet E, Gussinyé M, Albisu MA, Yeste D, Clemente M, Hernández de la Calle I, Del Campo M, Vendrell T, Blanco A, Martínez-Mora J, Granada ML, Salinas I, Forn J, Calaf J, Angerri O, Martínez-Sopena MJ, Del Valle J, García E, Gracia-Bouthelier R, Lapunzina P, Mayayo E, Labarta JI, Lledó G, Sánchez Del Pozo J, Arroyo J, Pérez-Aytes A, Beneyto M, Segura A, Borrás V, Gabau E, Caimarí M, Rodríguez A, Martínez-Aedo MJ, Carrera M, Castaño L, Andrade M, Bermúdez de la Vega JA. Novel (60%) and recurrent (40%) androgen receptor gene mutations in a series of 59 patients with a 46,XY disorder of sex development. J Clin Endocrinol Metab 2010; 95:1876-88. [PMID: 20150575 DOI: 10.1210/jc.2009-2146] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Androgen receptor (AR) gene mutations are the most frequent cause of 46,XY disorders of sex development (DSD) and are associated with a variety of phenotypes, ranging from phenotypic women [complete androgen insensitivity syndrome (CAIS)] to milder degrees of undervirilization (partial form or PAIS) or men with only infertility (mild form or MAIS). OBJECTIVE The aim of the study was to characterize the contribution of the AR gene to the molecular cause of 46,XY DSD in a series of Spanish patients. SETTING We studied a series of 133 index patients with 46,XY DSD in whom gonads were differentiated as testes, with phenotypes including varying degrees of undervirilization, and in whom the AR gene was the first candidate for a molecular analysis. METHODS The AR gene was sequenced (exons 1 to 8 with intronic flanking regions) in all patients and in family members of 61% of AR-mutated gene patients. RESULTS AR gene mutations were found in 59 individuals (44.4% of index patients), of whom 46 (78%) were CAIS and 13 (22%) PAIS. Fifty-seven different mutations were found: 21.0% located in exon 1, 15.8% in exons 2 and 3, 57.9% in exons 4-8, and 5.3% intronic. Twenty-three mutations (40.4%) had been previously described and 34 (59.6%) were novel. CONCLUSIONS AR gene mutation is the most frequent cause of 46,XY DSD, with a clearly higher frequency in the complete phenotype. Mutations spread along the whole coding sequence, including exon 1. This series shows that 60% of mutations detected during the period 2002-2009 were novel.
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Affiliation(s)
- L Audi
- Unidad Investigación Endocrinología Pediátrica, Institut de Recerca, Hospital Vall d'Hebron, Paseo Vall d'Hebron 119, 08035 Barcelona, Spain.
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9
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Zorio E, Medina P, Rueda J, Millán JM, Arnau MA, Beneyto M, Marín F, Gimeno JR, Osca J, Salvador A, España F, Estellés A. Insights into the role of microRNAs in cardiac diseases: from biological signalling to therapeutic targets. Cardiovasc Hematol Agents Med Chem 2009; 7:82-90. [PMID: 19149547 DOI: 10.2174/187152509787047676] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
microRNAs have recently opened new pathways to explain gene expression and disease biology in many scenarios, including cardiac diseases. microRNAs are endogenous small non-coding RNAs that mediate post-transcriptional repression or messenger RNA degradation. By annealing to inexactly complementary sequences in the 3' untranslated region of the target messenger RNA, protein level is down-regulated. Several microRNAs appear to act cooperatively through multiple target sites in one gene and, conversely, most microRNAs can target several genes. miR-133 and miR-1 are specifically expressed in cardiac and skeletal muscle and control myogenesis, cardiac development, cardiac performance and cardiomyocyte hypertrophy (mainly by tuning transcription factors and other growth-related targets). They also modulate the expression of certain cardiac ion channels and related proteins with proarrhythmic effect. Besides them, other microRNAs have been shown to exert influence on the myocardial growth, the electrical balance and the angiogenesis processes that take place in the heart. Bioinformatics is a useful tool to identify potential targets of a given microRNA, although there is still substantial concern about their reliability. Experimental manipulation of microRNAs has provided a tantalizing basis to speculate that future research on microRNAs may yield important progress in the prevention of sudden cardiac death and in the treatment of cardiac heart failure. However, the final effect of the blockage of microRNAs in vivo remains unclear, since each of them can target hundreds of genes with different intensity. The era of the microRNAs in cardiovascular diseases has just started.
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Affiliation(s)
- E Zorio
- Cardiology Department, Hospital Universitario La Fe, Av. Campanar 21, Valencia, Spain.
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Abstract
PURPOSE Inherited retinal dystrophies and hearing loss disorders have a broad clinical and genetic heterogeneity. Over the last decade there have been major advances in our understanding of the molecular pathology of these diseases; currently over 200 genes and loci are known to be involved in retinal disorders, and over 60 genes/loci are causative for hearing impairment. METHODS Genetic testing is crucial for confirming the diagnosis at a molecular level. It also allows a more precise prognosis to be made of the future clinical evolution, as well as an accurate genetic and reproductive counselling, and raises the possibility of creating genetically homogeneous groups of patients for future clinical trials. RESULTS The high number of genes responsible for these disorders makes molecular testing overwhelming in terms of cost, time and technical effectiveness, and no centre offers testing of all known genes. Several diagnostic tools have emerged recently to circumvent this problem. CONCLUSIONS In this report, we review the vast genetic heterogeneity of retinal dystrophies and hypoacusis, recent advances in gene discovery, the different DNA-based microarray technologies available for molecular testing, their benefits and limitations, and novel therapeutic approaches.
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Affiliation(s)
- J M Millán
- Unidad de Genética, Hospital Universitario La Fe y Departamento de Genética, Universidad de Valencia y Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Valencia, Spain.
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11
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Casana P, Cabrera N, Cid AR, Haya S, Beneyto M, Espinos C, Cortina V, Dasi MA, Aznar JA. Severe and moderate hemophilia A: identification of 38 new genetic alterations. Haematologica 2008; 93:1091-4. [DOI: 10.3324/haematol.12344] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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12
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Jaijo T, Aller E, Beneyto M, Najera C, Graziano C, Turchetti D, Seri M, Ayuso C, Baiget M, Moreno F, Morera C, Perez-Garrigues H, Millan JM. MYO7A mutation screening in Usher syndrome type I patients from diverse origins. J Med Genet 2007; 44:e71. [PMID: 17361009 PMCID: PMC2598023 DOI: 10.1136/jmg.2006.045377] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- T Jaijo
- Unidad de Genetica, Hospital Universitario La Fe, Valencia, Spain
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13
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Ezquieta B, Beneyto M, Muñoz-Pacheco R, Barrio R, Oyarzabal M, Lechuga JL, Luzuriaga C, Hermoso F, Quinteiro S, Martinez S. Gene duplications in 21-hydroxylase deficiency: the importance of accurate molecular diagnosis in carrier detection and prenatal diagnosis. Prenat Diagn 2007; 26:1172-8. [PMID: 17042033 DOI: 10.1002/pd.1584] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND The detection of 21-OH deficiency (21OHD) carriers in the general population requires that misinterpretations of apparently severe mutations in alleles carrying duplicated genes be avoided. Prenatal treatment prevents virilization in female fetuses and genetic counseling may be offered to couples in which one partner is either a patient or a carrier. This paper proposes a semiquantitative PCR method involving primer extension that distinguishes the severe point mutation Q318X in single gene copy alleles from the normal/nondeficient variant in gene-duplicated alleles. SAMPLES AND METHODS DNA from 65 individuals carrying Q318X variants, that of 85 partners of 21OHD carriers or patients, and one fetal sample (as well as the DNA of his family) were analyzed. 21OHD alleles were studied by gene-specific PCR/allele-specific oligonucleotides hybridization for common mutations, Southern analysis, complementary direct sequencing and microsatellite typing. Primer extension analysis of the Q318X variants using fluorescent dideoxynucleotides was performed on CYP21A2 gene-specific PCR-amplified DNA samples from controls, patients, potential carriers and prenatal samples. RESULTS Different fluorescence patterns were seen for the severe mutation (single gene copy) and the nondeficient (gene-duplicated) alleles carrying Q318X. The normal/mutant fluorescence peak (N/M) ratio was < 1 in all heterozygous carriers (mean 0.83; min. 0.70; max. 0.95). In all normal individuals carrying the gene-duplicated Q318X normal variant, the N/M ratio was > 1 (mean 1.69; min. 1.44; max. 2.02). CONCLUSION The proposed method discriminated between the severe Q318X mutation and the normal Q318X variant in gene duplication, and could be a useful complementary tool in prenatal diagnosis and carrier detection.
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Affiliation(s)
- B Ezquieta
- Servicio de Bioquímica, Laboratorio Diagnóstico Molecular, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
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14
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Aller E, Jaijo T, Beneyto M, Nájera C, Oltra S, Ayuso C, Baiget M, Carballo M, Antiñolo G, Valverde D, Moreno F, Vilela C, Collado D, Pérez-Garrigues H, Navea A, Millán JM. Identification of 14 novel mutations in the long isoform of USH2A in Spanish patients with Usher syndrome type II. J Med Genet 2006; 43:e55. [PMID: 17085681 PMCID: PMC2563181 DOI: 10.1136/jmg.2006.041764] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [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: 11/04/2022]
Abstract
Mutations in USH2A gene have been shown to be responsible for Usher syndrome type II, an autosomal recessive disorder characterised by hearing loss and retinitis pigmentosa. USH2A was firstly described as consisting of 21 exons, but 52 novel exons at the 3' end of the gene were recently identified. In this report, a mutation analysis of the new 52 exons of USH2A gene was carried out in 32 unrelated patients in which both disease-causing mutations could not be found after the screening of the first 21 exons of the USH2A gene. On analysing the new 52 exons, fourteen novel mutations were identified in 14 out of the 32 cases studied, including 7 missense, 5 frameshift, 1 duplication and a putative splice-site mutation.
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Affiliation(s)
- E Aller
- Unit of Genetics, Hospital La Fe, Avda Campanar, 21, 46009 Valencia, Spain
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15
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Kristiansen LV, Beneyto M, Haroutunian V, Meador-Woodruff JH. Changes in NMDA receptor subunits and interacting PSD proteins in dorsolateral prefrontal and anterior cingulate cortex indicate abnormal regional expression in schizophrenia. Mol Psychiatry 2006; 11:737-47, 705. [PMID: 16702973 DOI: 10.1038/sj.mp.4001844] [Citation(s) in RCA: 151] [Impact Index Per Article: 8.4] [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: 02/06/2023]
Abstract
Abnormal expression of the N-methyl-D-Aspartate (NMDA) receptor and its interacting molecules of the postsynaptic density (PSD) are thought to be involved in the pathophysiology of schizophrenia. Frontal regions of neocortex including dorsolateral prefrontal (DLPFC) and anterior cingulate cortex (ACC) are essential for cognitive and behavioral functions that are affected in schizophrenia. In this study, we have measured protein expression of two alternatively spliced isoforms of the NR1 subunit (NR1C2 and NR1C2') as well as expression of the NR2A-D subunits of the NMDA receptor in DLPFC and ACC in post-mortem samples from elderly schizophrenic patients and a comparison group. We found significantly increased expression of NR1C2' but not of NR1C2 in ACC, suggesting altered NMDA receptor cell membrane expression in this cortical area. We did not find significant changes in the expression of either of the NR1 isoforms in DLPFC. We did not detect changes of any of the NR2 subunits studied in either cortical area. In addition, we studied expression of the NMDA-interacting PSD molecules NF-L, SAP102, PSD-95 and PSD-93 in ACC and DLPFC at both transcriptional and translational levels. We found significant changes in the expression of NF-L in DLPFC, and PSD-95 and PSD-93 in ACC; increased transcript expression was associated with decreased protein expression, suggesting abnormal translation and/or accelerated protein degradation of these molecules in schizophrenia. Our findings suggest abnormal regional processing of the NMDA receptor and its associated PSD molecules, possibly involving transcription, translation, trafficking and protein stability in cortical areas in schizophrenia.
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Affiliation(s)
- L V Kristiansen
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294-0017, USA.
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16
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Jaijo T, Aller E, Oltra S, Beneyto M, Nájera C, Ayuso C, Baiget M, Carballo M, Antiñolo G, Valverde D, Moreno F, Vilela C, Perez-Garrigues H, Navea A, Millán JM. Mutation profile of the MYO7A gene in Spanish patients with Usher syndrome type I. Hum Mutat 2006; 27:290-1. [PMID: 16470552 DOI: 10.1002/humu.9404] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [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: 11/06/2022]
Abstract
Usher syndrome type I is the most severe form of Usher syndrome. It is an autosomal recessive disorder characterized by profound congenital sensorineural deafness, retinitis pigmentosa, and vestibular abnormalities. Mutations in the myosin VIIA gene (MYO7A) are responsible for Usher syndrome type 1B (USH1B). This gene is thought to bear greatest responsibility for USH1 and, depending on the study, has been reported to account for between 24% and 59% of USH1 cases. In this report a mutation screening of the MYO7A gene was carried out in a series of 48 unrelated USH1 families using single strand conformation polymorphism analysis (SSCP) and direct sequencing of those fragments showed an abnormal electrophoretic pattern. Twenty-five mutations were identified in 23 out of the 48 families studied (47.9%). Twelve of these mutations were novel, including five missense mutations, three premature stop codons, three frameshift, and one putative splice-site mutation. Based on our results we can conclude there is an absence of hot spot mutations in the MYO7A gene and that this gene plays a major role in Usher syndrome.
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Affiliation(s)
- T Jaijo
- Unidad de Genética, Hospital La Fe, Valencia, Spain
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17
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Aller E, Jaijo T, Oltra S, Alió J, Galán F, Nájera C, Beneyto M, Millán JM. Mutation screening of USH3 gene (clarin-1) in Spanish patients with Usher syndrome: low prevalence and phenotypic variability. Clin Genet 2005; 66:525-9. [PMID: 15521980 DOI: 10.1111/j.1399-0004.2004.00352.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Usher syndrome type III is an autosomal recessive disorder clinically characterized by the association of retinitis pigmentosa (RP), variable presence of vestibular dysfunction and progressive hearing loss, being the progression of the hearing impairment the critical parameter classically used to distinguish this form from Usher syndrome type I and Usher syndrome type II. Usher syndrome type III clinical subtype is the rarest form of Usher syndrome in Spain, accounting only for 6% of all Usher syndrome Spanish cases. The gene responsible for Usher syndrome type III is named clarin-1 and it is thought to be involved in hair cell and photoreceptor cell synapses. Here, we report a screening for mutations in clarin-1 gene among our series of Usher syndrome Spanish patients. Clarin-1 has been found to be responsible for the disease in only two families: the first one is a previously reported family homozygous for Y63X mutation and the second one, described here, is homozygous for C40G. This accounts for 1.7% of Usher syndrome Spanish families. It is noticeable that, whereas C40G family is clinically compatible with Usher syndrome type III due to the progression of the hearing loss, Y63X family could be diagnosed as Usher syndrome type I because the hearing impairment is profound and stable. Thus, we consider that the progression of hearing loss is not the definitive key parameter to distinguish Usher syndrome type III from Usher syndrome type I and Usher syndrome type II.
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Affiliation(s)
- E Aller
- Unidad de Genética y Diagnóstico Prenatal, Hospital Universitario La Fe, Spain
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18
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Abstract
OBJECTIVE To obtain epidemiological data on the prevalence of the different types of Usher syndrome (US) in Spain, since these data were missing; to estimate the proportion of sporadic cases among simplex families, and calculate the prevalence of the Usher syndrome in a homogeneous population from Eastern Spain (3,875,234 inhabitants) that is representative of the Spanish population. METHODS Otological, ophthalmological and genetic studies were performed in 89 US patients from 46 families and subjected to statistical and segregation analysis. RESULTS 41.6% of them suffered US type I, 46.1% type II, and in 12.3% the classification remains unclear. The estimated prevalence for the Province of Valencia was 4.2/100,000. There was a notable excess of male-only affected multiplex sibships in our sample that could be attributable to an X-linked inheritance. CONCLUSIONS The number of families with USI type was similar to that of families with USII type. The estimated prevalence for the Province of Valencia is in agreement with other reports in which the estimate for the prevalence of US ranges from 1.8 to 6.2/100,000.
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Affiliation(s)
- C Espinós
- Departamento de Genética, Facultad de Ciencias Biológicas, Universidad de Valencia, Valencia, Spain
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19
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Jaijo T, Aller E, Beneyto M, Nájera C, Millán JM. Estudio genético molecular del síndrome de Usher en España. Acta Otorrinolaringológica Española 2005; 56:285-9. [PMID: 16240916 DOI: 10.1016/s0001-6519(05)78616-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Usher syndrome (USH) associates deafness and retinitis pigmentosa (RP). It is a disease both clinically and genetically heterogeneous. It is inherited as an autosomal recessive trait and its prevalence makes it the most frequent association of hearing loss and RP. Clinically Usher syndrome is divided into type I (USH1), II (USH2) and III (USH3), according to the severity of hearing loss, age of onset of RP and the existence or not of vestibular dysfunction. There are at least 7 different localizations for USH1 and 5 genes have been identified. For USH2, 3 loci and 2 genes have been reported and USH3 is due to Clarin-1 gene. Our aim is to perform a clinical and genetic characterization of all Usher syndrome patients in Spain.
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Affiliation(s)
- T Jaijo
- Unidad de Genetica, Hospital Universitario La Fe, Valencia
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Dreyer B, Tranebjaerg L, Brox V, Rosenberg T, Möller C, Beneyto M, Weston MD, Kimberling WJ, Cremers CW, Liu XZ, Nilssen O. A common ancestral origin of the frequent and widespread 2299delG USH2A mutation. Am J Hum Genet 2001; 69:228-34. [PMID: 11402400 PMCID: PMC1226039 DOI: 10.1086/321269] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [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] [Received: 03/27/2001] [Accepted: 04/30/2001] [Indexed: 11/03/2022] Open
Abstract
Usher syndrome type IIa is an autosomal recessive disorder characterized by mild-to-severe hearing loss and progressive visual loss due to retinitis pigmentosa. The mutation that most commonly causes Usher syndrome type IIa is a 1-bp deletion, described as "2299delG," in the USH2A gene. The mutation has been identified in several patients from northern and southern Europe and from North America, and it has been found in single patients from South America, South Africa, and China. Various studies have reported a range of frequencies (.16-.44) among patients with Usher syndrome, depending on the geographic origin of the patients. The 2299delG mutation may be the one that most frequently causes retinitis pigmentosa in humans. Given the high frequencies and the wide geographic distribution of the mutation, it was of interest to determine whether the mutation resulted from an ancestral mutational event or represented a mutational hotspot in the USH2A gene. Haplotype analysis was performed on DNA samples from 116 unrelated patients with Usher syndrome type IIa; the patients were from 14 countries and represented 148 2299delG alleles. On the basis of six single-nucleotide polymorphisms within the USH2A gene, 12 core haplotypes were observed in a panel of normal chromosomes. However, in our analysis, only one core haplotype was found to be associated with the 2299delG mutation. The data indicate that the widespread geographic distribution of the 2299delG mutation is the result of an ancestral mutation that has spread throughout Europe and into the New World as a result of migration.
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Affiliation(s)
- B Dreyer
- Department of Medical Genetics, University Hospital and University of Tromsø, N-9037 Tromsø, Norway.
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Abstract
BACKGROUND Retinoblastoma, the intraocular malignancy most common in children,occurs in both familial and sporadic (bilateral or unilateral). Hereditary predisposition is caused by a germ-line mutation while non-hereditary is due to two somatic mutations in a retinal cell. This work was carried out in order to analyse genetically, the high number of families with some affected member and to go deep into the molecular mechanisms responsible of this pathology. PATIENTS AND METHOD 59 families with one or more affected members were analysed. Cytogenetics and with polymorphic markers studies were carried out and a search for mutations was performed in DNA from white cells and from available tumoral tissue. RESULTS In four of the 5 familial cases, the responsible mutation was established,the same as in 9 of the 13 bilateral sporadic. In the 7% of the unilateral sporadic cases, mutation was found in leucocytary DNA. Lost of heterozygosity as a second mutational event was mainly due to mitotic recombination. CONCLUSIONS Among the mutations of our series, a higher frequency of punctual mutations,responsible of the first mutational event, was observed at constitutional level. Lost of heterozygosity was the mechanism observed in the majority of the tumours.
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Affiliation(s)
- C Nájera
- Departamento de Genética. Facultad de Ciencias Biológicas. Universitat de Valencia.
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22
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Abstract
We studied the connections of eleven auditory cortical areas with the claustrum and the endopiriform nucleus in the cat, by means of cortical injections of either wheat germ agglutinin conjugated to horseradish peroxidase, or biotinylated dextran amines. Unlike previously accepted reports, all auditory areas have reciprocal connections with the ipsi- and contralateral claustrum, though they differ in strength and/or topography. The areas that send the strongest projections are the intermediate region of the posterior ectosylvian gyrus and the insular cortex, followed by the primary auditory cortex and the dorsal portion of the posterior ectosylvian gyrus. The high degree of convergence of cortical axons in the intermediate region of the claustrum, arising from tonotopic and nontonotopic areas, suggests that claustral neurons are unlikely to be well tuned to the frequency of the acoustic stimulus. Corticoclaustral axons from any given area cover territories largely overlapping with those occupied by the claustrocortical neurons projecting back to the same area. The location of cortically projecting neurons in the claustrum matches the position of the target cortical area in the cerebral hemisphere, both rostrocaudally and dorsoventrally. These findings suggest that the intermediate region of the claustrum integrates inputs from all auditory cortical areas, and then sends the result of such processing back to every auditory cortical field. On the other hand, the endopiriform nucleus, a limbic-related structure thought to play a role in the acquisition of conditioned fear, would process mostly polymodal information, since it only receives projections from the insular and temporal cortices.
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Affiliation(s)
- M Beneyto
- Institute of Neurosciences, University Miguel Hernández and Consejo Superior de Investigaciones Científicas, San Juan, Alicante, Spain
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Sánchez F, Mateu E, Beneyto M, Nájera C, Prieto F. A constitutional homozygous mutation in the RB1 gene in a patient with unilateral retinoblastoma. J Med Genet 2000; 37:615-20. [PMID: 10991691 PMCID: PMC1734647 DOI: 10.1136/jmg.37.8.615] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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24
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Trujillo MJ, Millán JM, Nájera C, Beneyto M, García-Sandoval B, Rodriguez de Alba M, Sanz R, Ayuso C. Identification of two rare variants (G-->A at nucleotide 721; C-->T at nucleotide 5200) in the rhodopsin gene. Mutations in brief no. 187. Online. Hum Mutat 2000; 12:218. [PMID: 10660337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The authors report two new rare DNA sequence variants in the Rhodopsin gene. This gene is involved in the pathogenesis of some retinal hereditary disorders as Retinitis Pigmentosa. These rare variants are G-->A at nucleotide 721 of the non-coding region and C-->T at nucleotide 5200 within codon 323 which does not alter the aminoacid cysteine. Therefore, they are not implicated in the development of the Retinitis Pigmentosa disease.
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25
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Miano MG, Testa F, Strazzullo M, Trujillo M, De Bernardo C, Grammatico B, Simonelli F, Mangino M, Torrente I, Ruberto G, Beneyto M, Antinolo G, Rinaldi E, Danesino C, Ventruto V, D'Urso M, Ayuso C, Baiget M, Ciccodicola A. Mutation analysis of the RPGR gene reveals novel mutations in south European patients with X-linked retinitis pigmentosa. Eur J Hum Genet 1999; 7:687-94. [PMID: 10482958 DOI: 10.1038/sj.ejhg.5200352] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [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: 11/09/2022] Open
Abstract
The RPGR (retinitis pigmentosa GTPase regulator) gene has been shown to be mutated in 10-20% of patients with X-linked retinitis pigmentosa (XLRP), a severe form of inherited progressive retinal degeneration. A total of 29 different RPGR mutations have been identified in northern European and United States patients. We have performed mutation analysis of the RPGR gene in a cohort of 49 southern European males affected with XLRP. By multiplex SSCA and automatic direct sequencing of all 19 RPGR exons, seven different and novel mutations were identified in eight of the 49 families; these include three splice site mutations, two microdeletions, and two missense mutations. RNA analysis showed that the three splice site defects resulted in the generation of aberrant RPGR transcripts. Six of these mutations were detected in the conserved amino-terminal region of RPGR protein, containing tandem repeats homologous to the RCC1 protein, a guanine nucleotide-exchange factor for Ran-GTPase. Several exonic and intronic sequence variations were also detected. None of the RPGR mutations reported in other populations were identified in our series. Our results are consistent with the notions of heterogeneity and minority causation of XLRP by mutations in RPGR in Caucasian populations.
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Affiliation(s)
- M G Miano
- International Institute of Genetics and Biophysics, CNR, Naples, Italy
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26
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Abstract
Three new mutations in the myosin VIIA gene involved in the pathogenesis of Usher syndrome type Ib are reported. These mutations are K1080X in exon 25, E1170K in exon 28, and Y1719C in exon 37. It is presumed that these mutations are involved in the Usher syndrome Ib phenotype.
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Affiliation(s)
- J M Cuevas
- Departament de Genética, Universitat de València, València, Spain
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27
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Abstract
Three new mutations in the myosin VIIA gene involved in the pathogenesis of Usher syndrome type Ib are reported. These mutations are K1080X in exon 25, E1170K in exon 28, and Y1719C in exon 37. It is presumed that these mutations are involved in the Usher syndrome Ib phenotype. Hum Mutat 14:181, 1999. Copyright 1999 Wiley-Liss, Inc.
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Affiliation(s)
- JM Cuevas
- Departament de Genetica, Universitat de Valencia, Valencia, Spain
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28
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Beneyto M, Rueda J, Merchán JA, Prieto JJ. Specific staining of nonpyramidal cell populations of the cerebral cortex by lectin cytochemistry on semithin sections. Brain Res Bull 1999; 49:251-62. [PMID: 10424845 DOI: 10.1016/s0361-9230(99)00056-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 10/18/2022]
Abstract
The pattern of lectin labeling in the cerebral cortex of the cat was studied using semithin sections. The labeling produced by some lectins (Concanavalin A, Lens culinaris, Phaseolus vulgaris-L, Phaseolus vulgaris-E, Pisum sativum, wheat germ agglutinin, and succynilated-wheat germ) appeared inside every neuron as small cytoplasmic granules, probably corresponding to cisterns of endoplasmic reticulum and/or the Golgi complex. Lectins with affinity for alpha-mannosyl residues (Pisum sativum, Lens culinaris, and Concanavalin A) stained the cell surface of a subset of cortical neurons. The labeled cells were round or polygonal, medium to large neurons present in layers II-VI, exhibiting the morphological features of nonpyramidal cells. Previous lectin studies of perineuronal nets have shown that these extracellular specializations contain N-acetylgalactosamine and N-acetylglucosamine. Our results show that mannose is also a component of perineuronal nets and that lectins specific for alpha-mannose can be used as tools for the cytochemical detection of a separate class of cortical neurons, which have not yet been fully characterized. In addition, some lectins (Bandeiraea simplicifolia, Concanavalin A, Lens culinaris, Phaseolus vulgaris-L, Phaseolus vulgaris-E, Pisum sativum, and succynilated-wheat germ agglutinin) specifically labeled a population of a type of microglia-related cells known as perivascular cells. The data presented here report for the first time the selective staining of perivascular cells and further support the hypothesis that they are different from typical microglial cells.
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Affiliation(s)
- M Beneyto
- Institute of Neurosciences, University Miguel Hernández, San Juan, Alicante, Spain
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29
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Millán JM, Martínez F, Cadroy A, Gandía J, Casquero M, Beneyto M, Badía L, Prieto F. Screening for FMR1 mutations among the mentally retarded: prevalence of the fragile X syndrome in Spain. Clin Genet 1999; 56:98-9. [PMID: 10466426 DOI: 10.1034/j.1399-0004.1999.560116.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Espinós C, Pérez-Garrigues H, Beneyto M, Vilela C, Rodrigo O, Nájera C. [Syndromic hereditary deafness. Usher's syndrome. Oto-neurologic and genetic factors]. An Otorrinolaringol Ibero Am 1999; 26:83-95. [PMID: 10091368] [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] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Usher syndrome (USH) is an autosomal recessive hereditary disorder characterized by congenital bilateral sensorineural hearing loss and progressive loss of vision due to retinitis pigmentosa (RP). The prevalence of Usher syndrome is estimated to be 3-4.4 cases per 100.000 people. Several clinical types have been distinguished by age at onset, rate of progression, and severity of symptoms. Type I (USH1) is characterized by a congenital, severe-to-profound deafness and absent vestibular function. Type II (USH2) shows a congenital and moderate-to-severe hearing loss and normal vestibular response. It is also suggested a third type (USH3), clinically similar to USH2, but with progressive hearing loss. Genetic heterogeneity of USH is quite extensive. Up to now, seven different loci responsible for the defect are known: 14q, 11q, 11p, 10q and 21q for USH1; 1q for USH2 and 3q for USH3. Moreover, there are USH1 and USH2 families that fail to show linkage to these candidate regions demonstrating that should exist other loci causing USH, although their ubications are unknown. To date, only two genes involved in the USH pathology are known, although together they are responsibles of about the 80% of total USH cases: myosin VIIA, an unconventional myosin, involved in the USH1b phenotype and a protein similar to the laminina, responsible for the USH2a phenotype.
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Affiliation(s)
- C Espinós
- Departamento de Genética, Facultad de CC. Biológicas, Universitat de València
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31
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Cuevas JM, Espinós C, Millán JM, Sánchez F, Trujillo MJ, García-Sandoval B, Ayuso C, Nájera C, Beneyto M. Detection of a novel Cys628STOP mutation of the myosin VIIA gene in Usher syndrome type Ib. Mol Cell Probes 1998; 12:417-20. [PMID: 9843659 DOI: 10.1006/mcpr.1998.0202] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A Spanish family with three Usher I syndrome-affected members was linked to markers located on chromosome 11q. A search for mutations on the myosin VIIA gene revealed a novel mutation (Cys628STOP) on exon 16 segregating with the disorder in a homozygous state. This nonsense mutation could be responsible for the disease since it leads to a truncated protein that presumably has no function.
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Affiliation(s)
- J M Cuevas
- Departamento de Genética, Universidad de Valencia, Valencia, Spain
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32
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Beneyto M, Winer JA, Larue DT, Prieto JJ. Auditory connections and neurochemistry of the sagulum. J Comp Neurol 1998; 401:329-51. [PMID: 9811112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
We studied the cytoarchitecture, neurochemical organization, and connections of the sagulum. The goal was to clarify its role in midbrain, lateral tegmental, and thalamic auditory processing. On cytoarchitectonic grounds, ventrolateral (parvocellular) and dorsomedial (magnocellular) subdivisions were recognized. The patterns of immunostaining for gamma-aminobutyric acid (GABA) and glycine were distinct. Approximately 5-10% of the neurons were GABAergic, and more than one type was identified; GABAergic axon terminals were abundant in number and varied in form. Glycinergic neurons were much rarer, < 1% of the population, and glycinergic axon terminals were correspondingly sparse. Wheat germ agglutinin conjugated to horseradish peroxidase was used for purposes of connectional mapping, and biotinylated dextran amines revealed the structure of corticosagular axons. All nine cortical areas injected project to the ipsilateral sagulum. Five (areas AI, AII, SF, EPD, and Te) had heavier projections than the others. Areas AI and AII projected throughout the rostrocaudal sagulum. Labeling from AI was moderate in density and concentrated in the central sagulum, whereas the input from AII was heavier and ended more laterally. Suprasylvian fringe input was light, especially caudally, and was chiefly in the central sagulum. The projection from the dorsal region of the posterior ectosylvian gyrus was comparatively stronger and was in the dorsolateral sagulum. Finally, the temporal cortex sent axons to the most lateral sagulum, spanning the dorsoventral extent, whereas insular cortex axons ended diffusely in the dorsolateral sagulum. Corticofugal axons ranged from fine boutons en passant to larger globular terminals. The sagulum may represent the earliest significant opportunity in the ascending auditory pathway for corticofugal modulation. The most extensive input arises from the polymodal association areas. The sagulum then projects divergently to the dorsal cortex of the inferior colliculus and the dorsal division of the medial geniculate body. The projection from the dorsal division of the auditory thalamus to nonprimary auditory cortex completes this circuit between the forebrain and the midbrain and represents a nexus in the ascending and descending auditory systems. Such circuits could play a critical role in auditory-motor adjustments to sound.
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Affiliation(s)
- M Beneyto
- Department of Histology, Institute of Neuroscience, University Miguel Hernández, San Juan, Spain
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Espinós C, Millán JM, Sánchez F, Beneyto M, Nájera C. Ala397Asp mutation of myosin VIIA gene segregating in a Spanish family with type-Ib Usher syndrome. Hum Genet 1998; 102:691-4. [PMID: 9703432 DOI: 10.1007/s004390050763] [Citation(s) in RCA: 5] [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: 11/28/2022]
Abstract
In the current study, 12 Spanish families affected by type-I Usher syndrome, that was previously linked to chromosome 11q, were screened for the presence of mutations in the N-terminal coding portion of the motor domain of the myosin VIIA gene by single-strand conformation polymorphism analysis of the first 14 exons. A mutation (Ala397Asp) segregating with the disease was identified, and several polymorphisms were also detected. It is presumed that the other USHIB mutations in these families could be located in the unscreened regions of the gene.
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Affiliation(s)
- C Espinós
- Departamento de Genética, Fac. C.C. Biológicas, Universidad de Valencia, Spain
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34
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Espinós C, Nájera C, Millán JM, Ayuso C, Baiget M, Pérez-Garrigues H, Rodrigo O, Vilela C, Beneyto M. Linkage analysis in Usher syndrome type I (USH1) families from Spain. J Med Genet 1998; 35:391-8. [PMID: 9610802 PMCID: PMC1051313 DOI: 10.1136/jmg.35.5.391] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Usher syndrome (USH) is an autosomal recessive hereditary disorder characterised by congenital sensorineural hearing loss and gradual visual impairment secondary to retinitis pigmentosa (RP). The disorder is clinically and genetically heterogeneous. With regard to Usher type I (USH1), several subtypes have been described, the most frequent being USH1B located on chromosome 11q13.5. Of 18 USH1 families studied by linkage analysis, 12 (67%) showed significant lod score values for locus D11S527 (Zmax=14.032, theta=0.000) situated on chromosome 11q. Our findings suggest considerable genetic heterogeneity in the Spanish USH1 population. It is important to note that one of our families linked to the USH1B locus shows interesting intrafamilial clinical variability. As regards the remaining six USH1 families, the linkage analysis did not provide conclusive data, although two of them show slight linkage to markers located on chromosome 3q (Zmax=1.880, theta=0.000 for D3S1279), the same location that had previously been assigned to some USH3 families.
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Affiliation(s)
- C Espinós
- Departamento de Genética, Fac C C Biológicas, Universidad de Valencia, Burjassot, Spain
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35
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Nájera C, Beneyto M. [About genes and disease]. Med Clin (Barc) 1998; 110:495-7. [PMID: 9611731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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36
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Beneyto M, Sala JC, Sala ML, Merchan JA, Prieto JJ. Structure of glycogen particles in organ of Corti's outer hair cells in three rodent species. J Hirnforsch 1997; 38:341-51. [PMID: 9350505] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Organ of Corti's outer hair cells are one of the few cell types in mammals to contain large cytoplasmic glycogen stores, and the only one in the adult auditory receptor. Previous reports on the structure and distribution of glycogen in the adult organ of Corti were mainly based on light microscopy histo- and cytochemical methods, and the scare EM studies on the topic relied on techniques which were not sensitive or specific enough. Furthermore, it has been reported that glycogen particles are not present in outer hair cells of all species. A first goal of the present study was to describe the ultrastructure of glycogen stores in organ of Corti's outer hair cells in Guinea pig, rat, and mouse, using the periodic acid-thiocarbohydrazide-silver proteinate method. In addition, differences in the subcellular and cochleotopic distribution of this substance were analyzed. In the adult organ of Corti only the outer hair cells contain glycogen stores. Present throughout their cytoplasm, these deposits appear either as single beta particles, or as aggregates of these, forming alpha particles. Though most alpha particles are round, some appear long and conspicuously straight in longitudinal sections of those cells near the apex of the cochlea, and they seem to be apposed to some filamentous structure. On the other hand, when the cells are sectioned transversely the larger aggregates of glycogen particles follow a curved course. Since outer hair cells of the apical region of the cochlea contain a bundle of contractile microfilaments, our results suggest that glycogen is associated with the contractile apparatus of these cells. This hypothesis is in good accordance with previous experimental data which suggest that glycogen is used as energy source for the contractile movements of outer hair cells.
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Affiliation(s)
- M Beneyto
- Department of Histology, University Miguel Hernandez, San Juan, Spain
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37
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Martínez-Mir A, Vilela C, Bayés M, Valverde D, Dain L, Beneyto M, Marco M, Baiget M, Grinberg D, Balcells S, Gonzàlez-Duarte R, Vilageliu L. Putative association of a mutant ROM1 allele with retinitis pigmentosa. Hum Genet 1997; 99:827-30. [PMID: 9187681 DOI: 10.1007/s004390050456] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Retinitis pigmentosa (RP) is a clinically and genetically heterogeneous form of retinal degeneration. Several genes and loci have been shown to be involved in the disease, although each of them only accounts for a few cases. Mutations in the gene encoding ROM1, a rod-specific protein, have been putatively associated with several forms of RP. Here we describe a double-mutant allele of this gene, P60T and T108M, present in two affected sibs and also in two healthy members of a Spanish RP family. The same double-mutant allele was previously considered to be responsible for autosomal dominant RP in one family. We now report data that question the potential pathogenicity of these two ROM1 mutations.
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Affiliation(s)
- A Martínez-Mir
- Departament de Genètica, Facultat de Biologia Universitat de Barcelona, Spain
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38
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Abstract
We have analyzed 43 families with either familial retinoblastoma (RB) (four kindreds), bilateral sporadic RB (10 individuals), or unilateral sporadic RB (29 individuals). Genetic studies focused on karyotype analysis, loss of heterozygosity of intragenic polymorphisms, and search for point mutations. We have been able to identify the genetic defect underlying the disease in eight cases. Deletions have been found in three patients with sporadic RB, two bilateral in one of which karyotyping had previously detected an interstitial deletion of chromosome 13 affecting (q13-q31) and one unilateral. Five different point mutations were responsible for three cases of bilateral sporadic RB, one case of bilateral sporadic RB, and one case of bilateral familial RB. The low frequency of constitutional mutations found in our study has led us to review and evaluate the possibilities and limitations of the present genetic analyses on RB and to access the different factors influencing the detection of mutations causing the disease, because genetic counseling is mainly based on mutation identification.
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Affiliation(s)
- E Mateu
- Unidad de Genética y Diagnóstico Prenatal, Hospital La Fe, Valencia, Spain
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39
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Vilela C, Beneyto M, Bosch R, Millan JM, Marco M, Vallet M, Alonso L, Tormos I, Najera C, Valls B, Paricio N, Prieto F. Clinical and genetic aspects of two Spanish families with autosomal dominant retinitis pigmentosa (ADRP). Ophthalmic Genet 1996; 17:29-33. [PMID: 8740695 DOI: 10.3109/13816819609057866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A study was made of two families with autosomal dominant retinitis pigmentosa (ADRP) from Valencia (Spain). One family (ADRP15) was found to have mutation in codon 114 of the rhodopsin gene that led to a substitution of a glycine for an aspartic acid. The second family (ADRP7) substituted an aspartic acid for valine in codon 173 of the peripherin-RDS gene. Rhodopsin is involved in 25% of ADRP cases and many mutations of this gene have been described as causing different forms of the disease, with variable severity and age at onset. ADRP has been classified as RP with a milder symptom evolution, a typical RP fundus pattern, and macular involvement occurring after the second decade of life. Peripherin-RDS gene mutations lead to RP or other retinopathies. Furthermore, two mutations in codon 172 have been described as causing macular dystrophy. In ADRP7, a mutation in neighboring codon 173 produced RP with an atypical fundus pattern and macular involvement within the first decade of life. These observations confirm the established clinical and genetic heterogeneity involved in this form of RP.
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Affiliation(s)
- C Vilela
- Neurophysiology Department, La Fé Hospital, Valencia, Spain
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40
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Antonarakis SE, Rossiter JP, Young M, Horst J, de Moerloose P, Sommer SS, Ketterling RP, Kazazian HH, Négrier C, Vinciguerra C, Gitschier J, Goossens M, Girodon E, Ghanem N, Plassa F, Lavergne JM, Vidaud M, Costa JM, Laurian Y, Lin SW, Lin SR, Shen MC, Lillicrap D, Taylor SA, Windsor S, Valleix SV, Nafa K, Sultan Y, Delpech M, Vnencak-Jones CL, Phillips JA, Ljung RC, Koumbarelis E, Gialeraki A, Mandalaki T, Jenkins PV, Collins PW, Pasi KJ, Goodeve A, Peake I, Preston FE, Schwartz M, Scheibel E, Ingerslev J, Cooper DN, Millar DS, Kakkar VV, Giannelli F, Naylor JA, Tizzano EF, Baiget M, Domenech M, Altisent C, Tusell J, Beneyto M, Lorenzo JI, Gaucher C, Mazurier C, Peerlinck K, Matthijs G, Cassiman JJ, Vermylen J, Mori PG, Acquila M, Caprino D, Inaba H. Factor VIII gene inversions in severe hemophilia A: results of an international consortium study. Blood 1995; 86:2206-12. [PMID: 7662970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Twenty-two molecular diagnostic laboratories from 14 countries participated in a consortium study to estimate the impact of Factor VIII gene inversions in severe hemophilia A. A total of 2,093 patients with severe hemophilia A were studied; of those, 740 (35%) had a type 1 (distal) factor VIII inversion, and 140 (7%) showed a type 2 (proximal) inversion. In 25 cases, the molecular analysis showed additional abnormal or polymorphic patterns. Ninety-eight percent of 532 mothers of patients with inversions were carriers of the abnormal factor VIII gene; when only mothers of nonfamilial cases were studied, 9 de novo inversions in maternal germ cells were observed among 225 cases (approximately 1 de novo maternal origin of the inversion in 25 mothers of sporadic cases). When the maternal grandparental origin was examined, the inversions occurred de novo in male germ cells in 69 cases and female germ cells in 1 case. The presence of factor VIII inversions is not a major predisposing factor for the development of factor VIII inhibitors; however, slightly more patients with severe hemophilia A and factor VIII inversions develop inhibitors (130 of 642 [20%]) than patients with severe hemophilia A without inversions (131 of 821 [16%]).
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Millán JM, Martínez F, Vilela C, Beneyto M, Prieto F, Nájera C. An autosomal dominant retinitis pigmentosa family with close linkage to D7S480 on 7q. Hum Genet 1995; 96:216-8. [PMID: 7635473 DOI: 10.1007/bf00207382] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Retinitis pigmentosa is the most prevalent inherited disorder of the retina. It can be autosomal dominant (adRP), autosomal recessive (arRP) or X-linked (XLRP). A form of adRP mapping to chromosome 7q was reported in a large Spanish pedigree. We have typed DNA from the members of another Spanish family for polymorphic markers from the known candidate genes. Positive lod scores were obtained only for the markers located on 7q31-35, giving a maximum lod score of 2.98 (3.01 by multipoint analysis) at theta = 0.00 for D7S480. A brief clinical evaluation is given.
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Affiliation(s)
- J M Millán
- Unidad de Genética y Diag, Prenatal, Hospital La Fe, Valencia, Spain
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42
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Bayés M, Valverde D, Balcells S, Grinberg D, Vilageliu L, Benítez J, Ayuso C, Beneyto M, Baiget M, Gonzàlez-Duarte R. Evidence against involvement of recoverin in autosomal recessive retinitis pigmentosa in 42 Spanish families. Hum Genet 1995; 96:89-94. [PMID: 7607661 DOI: 10.1007/bf00214192] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Autosomal recessive retinitis pigmentosa (ARRP) is a degenerative disease of photoreceptors in which defects in the genes encoding rhodopsin, the beta subunit of rod phosphodiesterase (PDEB) and, recently, in the gene for rod cGMP-gated channel, have been reported. However, detailed genetic involvement has not been ascertained in the great majority of cases. Recoverin, another member of the light transduction pathway, is a candidate gene for ARRP. We report the first analyses of the involvement of the recoverin gene (RCV1) in 42 Spanish ARRP families. Linkage and homozygosity studies with an intragenic polymorphism and the close markers D17S945 and D17S786 ruled out RCV1 as the cause of ARRP in 38 pedigrees. In the four remaining families, single strand conformation polymorphism analysis of the recoverin-coding region detected no mutations in the parents or in the affected members. These results strongly suggest that mutations in the RCV1 gene are not responsible for ARRP in these families.
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Affiliation(s)
- M Bayés
- Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, Spain
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43
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Abstract
The purposes of this study are to determine the frequencies of the different genetic forms of retinitis pigmentosa and to perform segregation analysis in the different genetic subtypes. Retinitis pigmentosa was diagnosed in 263 persons from 132 families. The frequency of the autosomal recessive type was the highest (31.8%) while the X-linked type was very rare (1.5%). The frequency of autosomal dominant type was 14.4% and the simplex cases constituted half of the total cases of RP registered in our community. In conclusion, in our population the high proportion of simplex cases and the low number of X-linked families are noticeable. The result of segregation analysis showed good agreement with expectation in autosomal dominant and autosomal recessive families but no more than 60% of all simplex cases were autosomal recessive. The proportion of sporadic cases was estimated statistically to be 39.9% of the total simplex cases.
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Affiliation(s)
- C Nájera
- Departamento de Genética, Facultad de Ciencias Biológicas, Universidad de Valencia, Spain
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44
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Millán JM, Nájera C, Beneyto M. [Molecular genetics of pigmentary retinopathy]. Med Clin (Barc) 1994; 102:30-2. [PMID: 8133683] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J M Millán
- Unidad de Genética y Diagnóstico Prenatal, Hospital La Fe, Valencia
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45
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Grüning G, Millan JM, Meins M, Beneyto M, Caballero M, Apfelstedt-Sylla E, Bosch R, Zrenner E, Prieto F, Gal A. Mutations in the human peripherin/RDS gene associated with autosomal dominant retinitis pigmentosa. Hum Mutat 1994; 3:321-3. [PMID: 8019570 DOI: 10.1002/humu.1380030326] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- G Grüning
- Institut für Humangenetik, Medizinische Universität, Lübeck, Germany
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46
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Ferrer Calvete J, Cordoba J, Beneyto M, Ribes C, Pereda A. [Detection of Delta-F508 mutation by PCR (polymerase chain reaction) in patients with cystic fibrosis]. An Esp Pediatr 1993; 39:557-8. [PMID: 8166420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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47
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Prieto F, Badía L, Palau F, Beneyto M, Montero MR, Martínez-Castellano F. [Importance of cytogenetics in the study of acute non-lymphoblastic leukemias]. Sangre (Barc) 1991; 36:229-35. [PMID: 1948543] [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: 12/29/2022]
MESH Headings
- Bone Marrow Examination
- Chromosome Aberrations
- Chromosome Deletion
- Chromosome Inversion
- Chromosomes, Human/drug effects
- Chromosomes, Human/ultrastructure
- Humans
- Leukemia, Myeloid, Acute/classification
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/pathology
- Methotrexate/pharmacology
- Myelodysplastic Syndromes/genetics
- Myelodysplastic Syndromes/pathology
- Neoplasms, Multiple Primary/genetics
- Proto-Oncogenes
- Translocation, Genetic
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Affiliation(s)
- F Prieto
- Unidad de Genética, Hospital La Fe, Valencia
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48
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Abstract
We report two cases of acute lymphoblastic leukemia with involvement of chromosome 5. One of them showed a del(5)(q13q33) in a 5-year-old boy who had previously received antineoplastic chemotherapy for an L1-ALL that had been diagnosed nine months before. The other one showed a t(5;7)(q12-13;q36) together with a t(8;14)(q24;q32) and a der(1) in a 66-year-old man with an L3-ALL. Both chromosome 5 aberrations are interpreted as evolutionary events. In the first case, it was secondary to chemotherapy treatment; in the second, an evolutionary chromosome rearrangement, considering the translocation between chromosomes 8 and 14 as the primary cytogenetic event.
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Affiliation(s)
- F Palau
- Unidad de Genética, Hospital La Fe, Valencia, Spain
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49
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Watty A, Prieto F, Beneyto M, Neugebauer M, Gal A. Gene localization in a family with X-linked syndromal mental retardation (Prieto syndrome). Am J Med Genet 1991; 38:234-9. [PMID: 1673297 DOI: 10.1002/ajmg.1320380213] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A mapping study was performed on a 3-generation Spanish family with X-linked syndromal mental retardation. Affected males have a typical facial appearance, ear malformations, abnormal growth of teeth, clinodactyly, dimpled skin at the lower back, and patellar luxation. In pneumoencephalography a marked subcortical cerebral atrophy was evident. In the linkage studies with polymorphic DNA markers, no recombination was found between the disease locus and the loci OTC and DXS148, both assigned to Xp21.1. One or more recombinants were observed between the disease locus and loci from the distal part of Xp and the pericentromeric region. Close linkage to loci of Xq has also been excluded. The analysis of multiple informative meioses suggests that the disease locus maps between DXS255 (Xp11.22) and DXS84 (Xp21.1) on Xp.
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Affiliation(s)
- A Watty
- Institut für Humangenetik, Bonn, Germany
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50
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Palau F, Prieto F, Badia L, Beneyto M, Sempere A, Borrego D. Cytogenetic evidence of involvement of an early progenitor myeloid cell in 4;11 translocation-associated acute leukemia. Cancer Genet Cytogenet 1991; 51:79-84. [PMID: 1984851 DOI: 10.1016/0165-4608(91)90012-j] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The t(4;11)(q21;q23)-associated acute leukemia may show both lymphoid and myelomonocytic features, which suggests a pluripotent progenitor stem cell as the hematopoietic cell involved in this neoplastic process. However, there is no cytogenetic evidence to support this contention. We present a case of acute myelomonocytic leukemia (M4, FAB subtype) with t(4;11)(q21;q23), which was also found in several hypertetraploid metaphases probably corresponding to megakaryocytes. This confirms the cellular origin in an early progenitor myeloid cell of this type of acute leukemia.
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Affiliation(s)
- F Palau
- Unidad de Genética, Hospital La Fe, Valencia, Spain
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