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Ragot H, Titeux M, Barbieux C, Gaucher S, Hanein S, Battistella M, Boudan R, Bourrat E, Hovnanian A. Signatures mutationnelles des carcinomes épidermoïdes cutanés survenant chez les patients atteints d’épidermolyse bulleuse dystrophique récessive. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Burin des Roziers C, Rothschild P, Barjol A, Clément C, Edelson C, Derrien S, Metge F, Michau S, Robert M, Prévot C, Dollfus H, Layet V, Delphin N, Bernardelli M, Ghiotti T, Hanein S, Fourrage C, Bonnefont J, Rozet J, Brézin A, Caputo G, Brémond-Gignac D, Valleix S. Targeted NGS: an effective approach for molecular diagnosis of hereditary vitreoretinopathies. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.02361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Burin des Roziers
- Laboratoire de Génétique Ophtalmologique; Institut Imagine - Institut des maladies génétiques; Paris France
| | - P.R. Rothschild
- Département d'ophtalmologie; Groupe Hospitalier Cochin-Hôtel-Dieu; Paris France
| | - A. Barjol
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - C.A. Clément
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - C. Edelson
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - S. Derrien
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - F. Metge
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - S. Michau
- Service d'ophtalmologie; Centre Hospitalier Universitaire de Montpellier; Montpellier France
| | - M. Robert
- Service d'ophtalmologie; Hôpital Necker - Enfants malades; Paris France
| | - C. Prévot
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - H. Dollfus
- Centre Hospitalier Universitaire de Strasbourg; Centre de référence pour les Affections Rares en Génétique Ophtalmologique CARGO; Strasbourg France
| | - V. Layet
- Groupe Hospitalier du Havre; Service de génétique clinique; Le Havre France
| | - N. Delphin
- Service de génétique moléculaire; Hôpital Necker - Enfants malades; Paris France
| | - M. Bernardelli
- Service de génétique moléculaire; Hôpital Necker - Enfants malades; Paris France
| | - T. Ghiotti
- Service de génétique moléculaire; Groupe Hospitalier Cochin-Hôtel-Dieu; Paris France
| | - S. Hanein
- Plateforme de génomique; Institut Imagine - Institut des maladies génétiques; Paris France
| | - C. Fourrage
- Service de génétique moléculaire; Hôpital Necker - Enfants malades; Paris France
| | - J.P. Bonnefont
- Service de génétique moléculaire; Hôpital Necker - Enfants malades; Paris France
| | - J.M. Rozet
- Laboratoire de Génétique Ophtalmologique; Institut Imagine - Institut des maladies génétiques; Paris France
| | - A. Brézin
- Département d'ophtalmologie; Groupe Hospitalier Cochin-Hôtel-Dieu; Paris France
| | - G. Caputo
- Service d'ophtalmologie; Fondation Rothschild; Paris France
| | - D. Brémond-Gignac
- Service d'ophtalmologie; Hôpital Necker - Enfants malades; Paris France
| | - S. Valleix
- Service de génétique moléculaire; Hôpital Necker - Enfants malades; Paris France
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Perrault I, Hanein S, Nicouleau M, Saunier S, Bole C, Nitschké P, Xerri O, Delphin N, Munnich A, Kaplan J, Rozet JM. Ciliome resequencing: A lifeline for molecular diagnosis in LCA. Cilia 2015. [PMCID: PMC4519145 DOI: 10.1186/2046-2530-4-s1-p55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Perrault I, Saunier S, Hanein S, Filhol E, Bizet A, Collins F, Salih M, Silva E, Baudouin V, Oud M, Shannon N, Le Merrer M, Pietrement C, Beales P, Arts H, Munnich A, Kaplan J, Antignac C, Cormier Daire V, Rozet JM. Mainzer-Saldino syndrome is a ciliopathy caused by mutations in the IFT140 gene. Cilia 2012. [PMCID: PMC3555764 DOI: 10.1186/2046-2530-1-s1-o28] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Papon JF, Perrault I, Coste A, Louis B, Gérard X, Hanein S, Fares-Taie L, Gerber S, Defoort-Dhellemmes S, Vojtek AM, Kaplan J, Rozet JM, Escudier E. Abnormal respiratory cilia in non-syndromic Leber congenital amaurosis with CEP290 mutations. J Med Genet 2010; 47:829-34. [PMID: 20805370 DOI: 10.1136/jmg.2010.077883] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Leber congenital amaurosis (LCA) is the earliest and most severe inherited retinal degeneration. Isolated forms of LCA frequently result from mutation of the CEP290 gene which is expressed in various ciliated tissues. METHODS Seven LCA patients with CEP290 mutations were investigated to study otorhinolaryngologic phenotype and respiratory cilia. Nasal biopsies and brushing were performed to study cilia ultrastructure using transmission electron microscopy and ciliary beating using high-speed videomicroscopy, respectively. CEP290 expression in normal nasal epithelium was studied using real-time RT-PCR. RESULTS When electron microscopy was feasible (5/7), high levels of respiratory cilia defects were detected. The main defects concerned dynein arms, central complex and/or peripheral microtubules. All patients had a rarefaction of ciliated cells and a variable proportion of short cilia. Frequent but moderate and heterogeneous clinical and ciliary beating abnormalities were found. CEP290 was highly expressed in the neural retina and nasal epithelial cells compared with other tissues. DISCUSSION These data provide the first clear demonstration of respiratory cilia ultrastructural defects in LCA patients with CEP290 mutations. The frequency of these findings in LCA patients along with the high expression of CEP290 in nasal epithelium suggest that CEP290 has an important role in the proper development of both the respiratory ciliary structures and the connecting cilia of photoreceptors. The presence of respiratory symptoms in patients could represent additional clinical criteria to direct CEP290 genotyping of patients affected with the genetically heterogeneous cone-rod dystrophy subtype of LCA.
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Goizet C, Boukhris A, Maltete D, Guyant-Maréchal L, Truchetto J, Mundwiller E, Hanein S, Jonveaux P, Roelens F, Loureiro J, Godet E, Forlani S, Melki J, Auer-Grumbach M, Fernandez JC, Martin-Hardy P, Sibon I, Sole G, Orignac I, Mhiri C, Coutinho P, Durr A, Brice A, Stevanin G. SPG15 is the second most common cause of hereditary spastic paraplegia with thin corpus callosum. Neurology 2009; 73:1111-9. [PMID: 19805727 DOI: 10.1212/wnl.0b013e3181bacf59] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Hereditary spastic paraplegias (HSPs) are very heterogeneous inherited neurodegenerative disorders. Our group recently identified ZFYVE26 as the gene responsible for one of the clinical and genetic entities, SPG15. Our aim was to describe its clinical and mutational spectra. METHODS We analyzed all exons of SPG15/ZFYVE26 gene by direct sequencing in a series of 60 non-SPG11 HSP subjects with associated mental or MRI abnormalities, including 30 isolated cases. The clinical data were collected through the SPATAX network. RESULTS We identified 13 novel truncating mutations in ZFYVE26, 12 of which segregated at the homozygous or compound heterozygous states in 8 new SPG15 families while 1 was found at the heterozygous state in a single family. Two of 3 splice site mutations were validated on mRNA of 2 patients. The SPG15 phenotype in 11 affected individuals was characterized by early onset HSP, severe progression of the disease, and mental impairment dominated by cognitive decline. Thin corpus callosum and white matter hyperintensities were MRI hallmarks of the disease in this series. CONCLUSIONS The mutations are truncating, private, and distributed along the entire coding sequence of ZFYVE26, which complicates the analysis of this gene in clinical practice. In our series of patients with hereditary spastic paraplegia-thin corpus callosum, the largest analyzed so far, SPG15 was the second most frequent form (11.5%) after SPG11. Both forms share similar clinical and imaging presentations with very few distinctions, which are, however, insufficient to infer the molecular diagnosis when faced with a single patient.
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Barbet F, Hakiki S, Orssaud C, Gerber S, Perrault I, Hanein S, Ducroq D, Dufier JL, Munnich A, Kaplan J, Rozet JM. A third locus for dominant optic atrophy on chromosome 22q. J Med Genet 2006; 42:e1. [PMID: 15635063 PMCID: PMC1735912 DOI: 10.1136/jmg.2004.025502] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [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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Hanein S, Perrault I, Gerber S, Tanguy G, Hamel C, Dufier JL, Rozet JM, Kaplan J. [Leber congenital amaurosis: comprehensive survey of genetic heterogeneity. A clinical definition update]. J Fr Ophtalmol 2005; 28:98-105. [PMID: 15767905 DOI: 10.1016/s0181-5512(05)81031-9] [Citation(s) in RCA: 3] [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: 10/22/2022]
Abstract
Leber congenital amaurosis (LCA) is the earliest and most severe form of all inherited retinal dystrophies, responsible for congenital blindness. Disease-associated mutations have been hitherto reported in seven genes. These genes are all expressed preferentially in the photoreceptor cells or the retinal pigment epithelium, but they are involved in strikingly different physiologic pathways, resulting in an unforeseeable pathophysiologic variety. This broad genetic and physiologic heterogeneity, which could greatly increase in the coming years, hinders molecular diagnosis in LCA patients. Genotyping is, however, required to establish genetically defined subgroups of patients ready for therapy. Here we report a comprehensive mutational analysis of all the known genes in 179 unrelated LCA patients, including 52 familial and 127 sporadic (27/127 consanguineous) cases. Mutations were identified in 47.5% of patients. GUCY2D accounted for by far the largest part of the LCA cases in our series (21.2%), followed by CRB1 (10%), RPE65 (6.1%), RPGRIP1 (4.5%), AIPL1 (3.4%), TULP1 (1.7%) and CRX (0.6%). The clinical history of all patients with mutations was carefully revisited in the search for phenotype variations. Genotype-phenotype correlations were found that made it possible to divide patients into two main groups. The first one includes patients whose symptoms fit the traditional definition of LCA, i.e., congenital or very early cone-rod dystrophy, while the second group gathers patients affected with severe yet progressive rod-cone dystrophy. In addition, objective ophthalmologic data subdivided each group into two subtypes. Based on these findings, we have drawn decisional flowcharts directing the molecular analysis of LCA genes in a given case. These flowcharts will hopefully lighten the onerous task of genotyping new patients, but only if the most precise clinical history since birth is available.
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Affiliation(s)
- S Hanein
- Unité de Recherche sur les Handicaps Génétiques de l'Enfant, INSERM U 393, Hôpital Necker-Enfants Malades, Paris, France
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Perrault I, Hanein S, Gerber S, Barbet F, Dufier JL, Munnich A, Rozet JM, Kaplan J. Evidence of autosomal dominant Leber congenital amaurosis (LCA) underlain by a CRX heterozygous null allele. J Med Genet 2003; 40:e90. [PMID: 12843339 PMCID: PMC1735514 DOI: 10.1136/jmg.40.7.e90] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- I Perrault
- Unité de Recherches sur les Handicaps Génétiques de l'Enfant, Hôpital Necker-Enfants Malades, 149 rue de Sévres, 75743 Paris Cedex 15, France
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Gerber S, Perrault I, Hanein S, Barbet F, Ducroq D, Ghazi I, Martin-Coignard D, Leowski C, Homfray T, Dufier JL, Munnich A, Kaplan J, Rozet JM. Complete exon-intron structure of the RPGR-interacting protein (RPGRIP1) gene allows the identification of mutations underlying Leber congenital amaurosis. Eur J Hum Genet 2001; 9:561-71. [PMID: 11528500 DOI: 10.1038/sj.ejhg.5200689] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2001] [Revised: 05/17/2001] [Accepted: 05/22/2001] [Indexed: 11/09/2022] Open
Abstract
Leber congenital amaurosis (LCA) is a genetically heterogeneous autosomal recessive condition responsible for congenital blindness or greatly impaired vision since birth. So far, six LCA loci have been mapped but only 4 out of 6 genes have been identified. A genome-wide screen for homozygosity was conducted in seven consanguineous families unlinked to any of the six LCA loci. Evidence for homozygosity was found in two of these seven families at the 14q11 chromosomal region. Two retinal specific candidate genes were known to map to this region, namely the neural retina leucine zipper (NRL) and the retinitis pigmentosa GTPase regulator interacting protein (RPGRIP1). No mutation of the NRL gene was found in any of the two families. Thus, we determined the complete exon-intron structure of the RPGRIP1 gene. RPGRIP1 encompasses 24 coding exons, nine of which are first described here with their corresponding exon-intron boundaries. The screening of the gene in the two families consistent with linkage to chromosome 14q11 allowed the identification of a homozygous null mutation and a homozygous missense mutation, respectively. Further screening of LCA patients unlinked to any of the four already identified LCA genes (n=86) identified seven additional mutations in six of them. In total, eight distinct mutations (5 out of 8 truncating) in 8/93 patients were found. So far this gene accounts for eight out of 142 LCA cases in our series (5.6%).
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Affiliation(s)
- S Gerber
- Unité de Recherches sur les Handicaps Génétiques de l'Enfant, Hôpital Necker-Enfants Malades, Paris, France
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Rozet JM, Perrault I, Gerber S, Hanein S, Barbet F, Ducroq D, Souied E, Munnich A, Kaplan J. Complete abolition of the retinal-specific guanylyl cyclase (retGC-1) catalytic ability consistently leads to leber congenital amaurosis (LCA). Invest Ophthalmol Vis Sci 2001; 42:1190-2. [PMID: 11328726] [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: 02/19/2023] Open
Abstract
PURPOSE Leber congenital amaurosis (LCA) is the earliest and the most severe form of all inherited retinal dystrophies. In 1996, the current investigators ascribed the disease in families linked to the LCA1 locus on chromosome 17p13.1 to mutations in the photoreceptor-specific guanylyl cyclase (retGC-1) gene. So far, 22 different mutations, of which 11 are missense mutations, have been identified in 25 unrelated families. This is a report of the functional analyses of nine of the missense mutations. METHODS cDNA constructs were generated that contained the retGC-1 missense mutations identified in patients related to the LCA1 locus. Mutants were expressed in COS7 cells and assayed for their ability to hydrolyze guanosine triphosphate (GTP) into cyclic guanosine monophosphate (cGMP). RESULTS All mutations lying in the catalytic domain showed a complete abolition of cyclase activity. In contrast, only one mutation lying in the extracellular domain also resulted in a severely reduced catalytic activity, whereas the others showed completely normal activity. CONCLUSIONS More than half the mutations identified in patients related to the LCA1 locus are truncating mutations expected to result in a total abolition of retGC-1 activity. Concerning missense mutations, half of them lying in the catalytic domain of the protein also result in the complete inability of the mutant cyclases to hydrolyze GTP into cGMP in vitro. In contrast, missense mutations lying in the extracellular domain, except one affecting the initiation codon, showed normal catalytic activity of retGC-1. Nevertheless, considering that all patients related to the LCA1 locus displayed the same phenotype, it can be assumed that all missense mutations would have the same dramatic consequences on protein activity in vivo as truncation mutations.
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Affiliation(s)
- J M Rozet
- Unité de Recherche sur les Handicaps Génétiques de l'Enfant, Insitut National de la Santé et de la Recherche Médicale U393, Hôpital des Enfants Malades, 149 rue de Sèvres, 75743 Paris Cedex 15, France
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