15 results on '"Caloustian C"'
Search Results
2. Nested core collections maximizing genetic diversity in Arabidopsis thaliana
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McKhann, Heather, Camilleri, Christine, Berard, A., Bataillon, T., Reboud, Xavier, Le Corre, V., Caloustian, C., Gut, I., Brunel, Dominique, ProdInra, Migration, Unité de recherche Génétique et amélioration des plantes (GAP), Institut National de la Recherche Agronomique (INRA), Diversité et génomes des plantes cultivées (UMR DGPC), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA), Biologie et Gestion des Adventices (BGA), and Etablissement National d'Enseignement Supérieur Agronomique de Dijon (ENESAD)-Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2004
3. Characterisation of gut microbiota composition in patients with axial spondyloarthritis and its modulation by TNF inhibitor treatment.
- Author
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Vallier M, Segurens B, Larsonneur E, Meyer V, Ferreira S, Caloustian C, Deleuze JF, Dougados M, Chamaillard M, and Miceli-Richard C
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- Humans, Tumor Necrosis Factor Inhibitors therapeutic use, HLA-B27 Antigen genetics, Treatment Outcome, Tumor Necrosis Factor-alpha, Gastrointestinal Microbiome, Spondylitis, Ankylosing drug therapy
- Abstract
Objective: To assess whether gut microbiota composition is associated with patient characteristics and may have predictive value on the response to TNF inhibitor (TNFi) treatment in axial spondyloarthritis (AxSpA)., Methods: The study involved 61 patients fulfilling the Assessment of SpondyloArthritis International Society classification criteria for AxSpA. All patients had active disease despite non-steroidal anti-inflammatory drugs intake and were eligible for treatment with a TNFi. At baseline, the mean Ankylosing Spondylitis Disease Activity Score was 2.9±1 and mean C reactive protein (CRP) level 9.7±11.4 mg/L. Bacterial 16S ribosomal RNA gene sequencing was performed on stool samples collected at baseline (month 0 (M0)) and 3 months after TNFi initiation (month 3 (M3)). Alpha and beta diversity metrics were calculated on the relative abundance of core operational taxonomic units (OTUs)., Results: The HLA-B27 status affected at least in part the global composition of faecal microbiota at M0 as well as the abundance/prevalence of several anaerobic bacteria in the families Oscillospiraceae , Lachnospiraceae and Bifidobacteriaceae . In contrast, smoking affected the global composition of faecal microbiota at both M0 and M3. The prevalence/abundance of seven bacterial OTUs at M0 was associated with response to TNFi treatment. One of the candidates, present only in non-responders, is the genus Sutterella , and the other six candidates are in the class Clostridia ., Conclusions: Several SpA patients' characteristics modulate the composition of gut microbiota as did TNFi treatment. Moreover, the abundance/prevalence of seven OTUs at baseline may be used as a novel non-invasive index that predicts the response to TNFi with greater accuracy than HLA-B27 status, CRP level and measures of disease activity., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2023
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4. A novel nonsense variant in SUPT20H gene associated with Rheumatoid Arthritis identified by Whole Exome Sequencing of multiplex families.
- Author
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Veyssiere M, Perea J, Michou L, Boland A, Caloustian C, Olaso R, Deleuze JF, Cornelis F, Petit-Teixeira E, and Chaudru V
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- Adult, Autophagy genetics, Cell Differentiation genetics, Exome genetics, Female, Genome-Wide Association Study methods, Humans, Macrophages physiology, Male, Monocytes physiology, Pedigree, Exome Sequencing methods, Arthritis, Rheumatoid genetics, Codon, Nonsense genetics, Genetic Predisposition to Disease genetics, Transcription Factors genetics
- Abstract
The triggering and development of Rheumatoid Arthritis (RA) is conditioned by environmental and genetic factors. Despite the identification of more than one hundred genetic variants associated with the disease, not all the cases can be explained. Here, we performed Whole Exome Sequencing in 9 multiplex families (N = 30) to identify rare variants susceptible to play a role in the disease pathogenesis. We pre-selected 77 genes which carried rare variants with a complete segregation with RA in the studied families. Follow-up linkage and association analyses with pVAAST highlighted significant RA association of 43 genes (p-value < 0.05 after 106 permutations) and pinpointed their most likely causal variant. We re-sequenced the 10 most significant likely causal variants (p-value ≤ 3.78*10-3 after 106 permutations) in the extended pedigrees and 9 additional multiplex families (N = 110). Only one SNV in SUPT20H: c.73A>T (p.Lys25*), presented a complete segregation with RA in an extended pedigree with early-onset cases. In summary, we identified in this study a new variant associated with RA in SUPT20H gene. This gene belongs to several biological pathways like macro-autophagy and monocyte/macrophage differentiation, which contribute to RA pathogenesis. In addition, these results showed that analyzing rare variants using a family-based approach is a strategy that allows to identify RA risk loci, even with a small dataset., Competing Interests: The authors have declared that no competing interests exist.
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- 2019
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5. Erratum to: Intradermal injection of a Tat Oyi-based therapeutic HIV vaccine reduces of 1.5 log copies/mL the HIV RNA rebound median and no HIV DNA rebound following cART interruption in a phase I/II randomized controlled clinical trial.
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Loret EP, Darque A, Jouve E, Loret EA, Nicolino-Brunet C, Morange S, Castanier E, Casanova J, Caloustian C, Bornet C, Coussirou J, Boussetta J, Couallier V, Blin O, Dussol B, and Ravaux I
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- 2016
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6. Intradermal injection of a Tat Oyi-based therapeutic HIV vaccine reduces of 1.5 log copies/mL the HIV RNA rebound median and no HIV DNA rebound following cART interruption in a phase I/II randomized controlled clinical trial.
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Loret EP, Darque A, Jouve E, Loret EA, Nicolino-Brunet C, Morange S, Castanier E, Casanova J, Caloustian C, Bornet C, Coussirou J, Boussetta J, Couallier V, Blin O, Dussol B, and Ravaux I
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- AIDS Vaccines administration & dosage, Adult, DNA, Viral blood, Double-Blind Method, Female, Humans, Injections, Intradermal, Male, Middle Aged, RNA, Viral blood, Treatment Outcome, AIDS Vaccines immunology, Anti-Retroviral Agents therapeutic use, HIV Infections therapy, HIV-1 immunology, Viral Load, tat Gene Products, Human Immunodeficiency Virus immunology
- Abstract
Background: A Tat Oyi vaccine preparation was administered with informed consent to 48 long-term HIV-1 infected volunteers whose viral loads had been suppressed by antiretroviral therapy (cART). These volunteers were randomized in double-blind method into four groups (n = 12) that were injected intradermally with 0, 11, 33, or 99 µg of synthetic Tat Oyi proteins in buffer without adjuvant at times designated by month 0 (M0), M1 and M2, respectively. The volunteers then underwent a structured treatment interruption between M5 and M7., Results: The primary outcomes of this phase I/IIa clinical trial were the safety and lowering the extent of HIV RNA rebound after cART interruption. Only one undesirable event possibly due to vaccination was observed. The 33 µg dose was most effective at lowering the extent of HIV RNA and DNA rebound (Mann and Whitney test, p = 0.07 and p = 0.001). Immune responses against Tat were increased at M5 and this correlated with a low HIV RNA rebound at M6 (p = 0.01)., Conclusion: This study suggests in vivo that extracellular Tat activates and protects HIV infected cells. The Tat Oyi vaccine in association with cART may provide an efficient means of controlling the HIV-infected cell reservoir.
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- 2016
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7. A new titinopathy: Childhood-juvenile onset Emery-Dreifuss-like phenotype without cardiomyopathy.
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De Cid R, Ben Yaou R, Roudaut C, Charton K, Baulande S, Leturcq F, Romero NB, Malfatti E, Beuvin M, Vihola A, Criqui A, Nelson I, Nectoux J, Ben Aim L, Caloustian C, Olaso R, Udd B, Bonne G, Eymard B, and Richard I
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- Female, Humans, Male, Middle Aged, Young Adult, Cardiomyopathies, Connectin genetics, Frameshift Mutation genetics, Muscular Dystrophy, Emery-Dreifuss diagnosis, Muscular Dystrophy, Emery-Dreifuss genetics, Phenotype
- Abstract
Objective: To identify the genetic defects present in 3 families with muscular dystrophy, contractures, and calpain 3 deficiency., Methods: We performed targeted exome sequencing on one patient presenting a deficiency in calpain 3 on Western blot but for which mutations in the gene had been excluded. The identification of a homozygous truncating mutation in the M-line part of titin prompted us to sequence this region in 2 additional patients presenting similar clinical and biochemical characteristics., Results: The 3 patients shared similar features: coexistence of limb-girdle weakness and early-onset diffuse joint contractures without cardiomyopathy. The biopsies showed rimmed vacuoles, a dystrophic pattern, and secondary reduction in calpain 3. We identified a novel homozygous mutation in the exon Mex3 of the TTN gene in the first patient. At protein level, this mutation introduces a stop codon at the level of Mex3. Interestingly, we identified truncating mutations in both alleles in the same region of the TTN gene in patients from 2 additional families. Molecular protein analyses confirm loss of the C-ter part of titin., Conclusions: Our study broadens the phenotype of titinopathies with the report of a new clinical entity with prominent contractures and no cardiac abnormality and where the recessive mutations lead to truncation of the M-line titin and secondary calpain 3 deficiency., (© 2015 American Academy of Neurology.)
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- 2015
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8. Sequence variants and haplotype analysis of cat ERBB2 gene: a survey on spontaneous cat mammary neoplastic and non-neoplastic lesions.
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Santos S, Bastos E, Baptista CS, Sá D, Caloustian C, Guedes-Pinto H, Gärtner F, Gut IG, and Chaves R
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- Alternative Splicing genetics, Animals, Base Sequence, Cats, Female, Genotype, Haplotypes genetics, Humans, Molecular Sequence Data, Proto-Oncogene Mas, Sequence Analysis, DNA, Genes, erbB-2, Mammary Neoplasms, Animal genetics, Mammary Neoplasms, Animal pathology, Receptor, ErbB-2 genetics
- Abstract
The human ERBB2 proto-oncogene is widely considered a key gene involved in human breast cancer onset and progression. Among spontaneous tumors, mammary tumors are the most frequent cause of cancer death in cats and second most frequent in humans. In fact, naturally occurring tumors in domestic animals, more particularly cat mammary tumors, have been proposed as a good model for human breast cancer, but critical genetic and molecular information is still scarce. The aims of this study include the analysis of the cat ERBB2 gene partial sequences (between exon 17 and 20) in order to characterize a normal and a mammary lesion heterogeneous populations. Cat genomic DNA was extracted from normal frozen samples (n = 16) and from frozen and formalin-fixed paraffin-embedded mammary lesion samples (n = 41). We amplified and sequenced two cat ERBB2 DNA fragments comprising exons 17 to 20. It was possible to identify five sequence variants and six haplotypes in the total population. Two sequence variants and two haplotypes show to be specific for cat mammary tumor samples. Bioinformatics analysis predicts that four of the sequence variants can produce alternative transcripts or activate cryptic splicing sites. Also, a possible association was identified between clinicopathological traits and the variant haplotypes. As far as we know, this is the first attempt to examine ERBB2 genetic variations in cat mammary genome and its possible association with the onset and progression of cat mammary tumors. The demonstration of a possible association between primary tumor size (one of the two most important prognostic factors) and the number of masses with the cat ERBB2 variant haplotypes reveal the importance of the analysis of this gene in veterinary medicine.
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- 2012
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9. SRPX2 mutations in disorders of language cortex and cognition.
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Roll P, Rudolf G, Pereira S, Royer B, Scheffer IE, Massacrier A, Valenti MP, Roeckel-Trevisiol N, Jamali S, Beclin C, Seegmuller C, Metz-Lutz MN, Lemainque A, Delepine M, Caloustian C, de Saint Martin A, Bruneau N, Depétris D, Mattéi MG, Flori E, Robaglia-Schlupp A, Lévy N, Neubauer BA, Ravid R, Marescaux C, Berkovic SF, Hirsch E, Lathrop M, Cau P, and Szepetowski P
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- Adult, Amino Acid Sequence, Animals, Apraxias genetics, Apraxias metabolism, Base Sequence, CHO Cells, Child, Child, Preschool, Cricetinae, Epilepsy, Rolandic genetics, Epilepsy, Rolandic metabolism, Female, Fibroblasts metabolism, Genetic Linkage, Genetic Testing, Glycosylation, Humans, Immunohistochemistry, Intellectual Disability metabolism, Language Disorders metabolism, Language Disorders physiopathology, Male, Membrane Proteins metabolism, Mice, Molecular Sequence Data, Neoplasm Proteins, Nerve Tissue Proteins metabolism, Transfection, Cerebral Cortex metabolism, Cognition, Language Disorders genetics, Membrane Proteins genetics, Mutation, Nerve Tissue Proteins genetics
- Abstract
The rolandic and sylvian fissures divide the human cerebral hemispheres and the adjacent areas participate in speech processing. The relationship of rolandic (sylvian) seizure disorders with speech and cognitive impairments is well known, albeit poorly understood. We have identified the Xq22 gene SRPX2 as being responsible for rolandic seizures (RSs) associated with oral and speech dyspraxia and mental retardation (MR). SRPX2 is a secreted sushi-repeat containing protein expressed in neurons of the human adult brain, including the rolandic area. The disease-causing mutation (N327S) resulted in gain-of-glycosylation of the secreted mutant protein. A second mutation (Y72S) was identified within the first sushi domain of SRPX2 in a male with RSs and bilateral perisylvian polymicrogyria and his female relatives with mild MR or unaffected carrier status. In cultured cells, both mutations were associated with altered patterns of intracellular processing, suggesting protein misfolding. In the murine brain, Srpx2 protein expression appeared in neurons at birth. The involvement of SRPX2 in these disorders suggests an important role for SRPX2 in the perisylvian region critical for language and cognitive development.
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- 2006
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10. Nested core collections maximizing genetic diversity in Arabidopsis thaliana.
- Author
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McKhann HI, Camilleri C, Bérard A, Bataillon T, David JL, Reboud X, Le Corre V, Caloustian C, Gut IG, and Brunel D
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- DNA, Plant genetics, Genome, Plant, Phenotype, Polymorphism, Single Nucleotide, Arabidopsis genetics, Genetic Variation
- Abstract
The successful exploitation of natural genetic diversity requires a basic knowledge of the extent of the variation present in a species. To study natural variation in Arabidopsis thaliana, we defined nested core collections maximizing the diversity present among a worldwide set of 265 accessions. The core collections were generated based on DNA sequence data from a limited number of fragments evenly distributed in the genome and were shown to successfully capture the molecular diversity in other loci as well as the morphological diversity. The core collections are available to the scientific community and thus provide an important resource for the study of genetic variation and its functional consequences in Arabidopsis. Moreover, this strategy can be used in other species to provide a rational framework for undertaking diversity surveys, including single nucleotide polymorphism (SNP) discovery and phenotyping, allowing the utilization of genetic variation for the study of complex traits.
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- 2004
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11. Molecular haplotyping at high throughput.
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Tost J, Brandt O, Boussicault F, Derbala D, Caloustian C, Lechner D, and Gut IG
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- Alleles, Base Sequence, DNA chemistry, DNA genetics, Electrophoresis, Agar Gel, Gene Frequency, Genotype, Humans, Sequence Analysis, DNA, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Haplotypes genetics, Polymorphism, Single Nucleotide genetics
- Abstract
Reconstruction of haplotypes, or the allelic phase, of single nucleotide polymorphisms (SNPs) is a key component of studies aimed at the identification and dissection of genetic factors involved in complex genetic traits. In humans, this often involves investigation of SNPs in case/control or other cohorts in which the haplotypes can only be partially inferred from genotypes by statistical approaches with resulting loss of power. Moreover, alternative statistical methodologies can lead to different evaluations of the most probable haplotypes present, and different haplotype frequency estimates when data are ambiguous. Given the cost and complexity of SNP studies, a robust and easy-to-use molecular technique that allows haplotypes to be determined directly from individual DNA samples would have wide applicability. Here, we present a reliable, automated and high-throughput method for molecular haplotyping in 2 kb, and potentially longer, sequence segments that is based on the physical determination of the phase of SNP alleles on either of the individual paternal haploids. We demonstrate that molecular haplotyping with this technique is not more complicated than SNP genotyping when implemented by matrix-assisted laser desorption/ionisation mass spectrometry, and we also show that the method can be applied using other DNA variation detection platforms. Molecular haplotyping is illustrated on the well-described beta(2)-adrenergic receptor gene.
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- 2002
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12. A first high-density map of 981 biallelic markers on human chromosome 14.
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Escary JL, Bottius E, Prince N, Reyes C, Fiawoumo Y, Caloustian C, Bruls T, Fujiyama A, Cooper RS, Adeyemo AA, Lathrop GM, Weissenbach J, Gyapay G, Foglio M, and Beckmann JS
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- Chromosome Mapping, Heterozygote, Humans, Polymorphism, Genetic, Alleles, Chromosomes, Human, Pair 14, Genetic Markers
- Abstract
As the largest set of sequence variants, single-nucleotide polymorphisms (SNPs) constitute powerful assets for mapping genes and mutations related to common diseases and for pharmacogenetic studies. A major goal in human genetics is to establish a high-density map of the genome containing several hundred thousand SNPs. Here we assayed 3.7 Mb (154,397 bp in 24 alleles) of chromosome 14 expressed sequence tags (ESTs) and sequence-tagged sites, for sequence variation in DNA samples from 12 African individuals. We identified and mapped 480 biallelic markers (459 SNPs and 21 small insertions and deletions), equally distributed between EST and non-EST classes. Extensive research in public databases also yielded 604 chromosome 14 SNPs (dbSNPs), 520 of which could be mapped and 19 of which are common between CNG (i.e., identified at the Centre National de Génotypage) and dbSNP polymorphisms. We present a dense map of SNP variation of human chromosome 14 based on 981 nonredundant biallelic markers present among 1345 radiation hybrid mapped sequence objects. Next, bioinformatic tools allowed 945 significant sequence alignments to chromosome 14 contigs, giving the precise chromosome sequence position for 70% of the mapped sequences and SNPs. In addition, these tools also permitted the identification and mapping of 273 SNPs in 159 known genes. The availability of this SNP map will permit a wide range of genetic studies on a complete chromosome. The recognition of 45 genes with multiple SNPs, by allowing the construction of haplotypes, should facilitate pharmacogenetic studies in the corresponding regions.
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- 2000
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13. Autosomal dominant nocturnal frontal lobe epilepsy in a Spanish family with a Ser252Phe mutation in the CHRNA4 gene.
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Sáenz A, Galán J, Caloustian C, Lorenzo F, Márquez C, Rodríguez N, Jiménez MD, Poza JJ, Cobo AM, Grid D, Prud'homme JF, and López de Munain A
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- Adult, Alleles, Child, Child, Preschool, DNA Mutational Analysis, Electroencephalography, Epilepsy, Frontal Lobe diagnosis, Female, Humans, Male, Middle Aged, Pedigree, Spain, Epilepsy, Frontal Lobe genetics, Phenylalanine genetics, Point Mutation genetics, Receptors, Nicotinic genetics, Serine genetics
- Abstract
Background: A large family with autosomal dominant nocturnal frontal lobe epilepsy from the south of Spain was studied. The clinical appearance of the disease in this family, which included 28 members, of whom 11 were affected and 2 were obligate carriers, was identical to that previously described in an Australian family and a Norwegian family, in which mutations in exon 5 of the CHRNA4 gene were found., Methods: Following DNA extraction, the family was genotyped with 4 fluorescent markers flanking the locus to the CHRNA4 gene on chromosome 20q13.3, and lod score computations were performed. The exon 5 of the CHRNA4 gene was amplified between nucleotides 535 and 825 and polymerase chain reaction products were purified and sequenced directly., Results: The same missense mutation as that found in the Australian family, C-->T, which causes the replacement of a serine with phenylalanine in amino acid 252 in exon 5, was detected. This mutation segregated with the disorder in all 11 affected members, in the 2 obligate carriers, and in 1 asymptomatic sibling, and was not found in 1 spouse and 1 daughter. Neither of the 2 polymorphisms found in a series of families with epilepsy were found in our sample [corrected]., Conclusions: These data confirm the clinical homogeneity in the phenotypic expression of autosomal dominant nocturnal frontal lobe epilepsy caused by mutation in the CHRNA4 gene, and the pathogenic role of the Ser252Phe mutation in this disorder.
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- 1999
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14. Non-founder mutations in the MEFV gene establish this gene as the cause of familial Mediterranean fever (FMF).
- Author
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Bernot A, da Silva C, Petit JL, Cruaud C, Caloustian C, Castet V, Ahmed-Arab M, Dross C, Dupont M, Cattan D, Smaoui N, Dodé C, Pêcheux C, Nédelec B, Medaxian J, Rozenbaum M, Rosner I, Delpech M, Grateau G, Demaille J, Weissenbach J, and Touitou I
- Subjects
- Africa, Northern ethnology, Amino Acid Sequence, Cytoskeletal Proteins, Exons genetics, Haplotypes, Humans, Molecular Sequence Data, Pyrin, Sequence Analysis, Familial Mediterranean Fever genetics, Mutation, Proteins genetics
- Abstract
Familial Mediterranean fever (FMF) is an autosomal recessive disorder characterized by recurring attacks of fever and serositis. It affects primarily North African Jews, Armenians, Turks and Arabs, in which a founder effect has been demonstrated. The marenostrin-pyrin-encoding gene has been proposed as a candidate gene for the disease ( MEFV ), on the basis of the identification of putative mutations clustered in exon 10 (M680V, M694I, M694V and V726A), each segregating with one ancestral haplotype. In a search for additional MEFV mutations in 120 apparently non-founder FMF chromosomes, we observed eight novel mutations in exon 2 (E148Q, E167D and T267I), exon 5 (F479L) and exon 10 (I692del K695R, A744S and R761H). Except for E148Q and K695R, all mutations were found in a single chromosome. Mutation E148Q was found in all ethnic groups studied and in association with a novel ancestral haplotype in non-Ashkenazi Jews (S2). Altogether, these new findings definitively establish the marenostrin/pyrin-encoding gene as the MEFV locus.
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- 1998
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15. A transcriptional Map of the FMF region.
- Author
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Bernot A, Heilig R, Clepet C, Smaoui N, Da Silva C, Petit JL, Devaud C, Chiannilkulchai N, Fizames C, Samson D, Cruaud C, Caloustian C, Gyapay G, Delpech M, and Weissenbach J
- Subjects
- Base Sequence, Blotting, Northern, Chromosomes, Artificial, Yeast, Cytoskeletal Proteins, DNA, Complementary, Exons, Gene Expression, Genomic Library, Humans, Metalloendopeptidases genetics, Molecular Sequence Data, Proteins genetics, Pyrin, Receptors, Odorant genetics, Restriction Mapping, Sensitivity and Specificity, Sequence Analysis, DNA, Software, Transcription, Genetic, Zinc Fingers genetics, Chromosome Mapping, Familial Mediterranean Fever genetics
- Abstract
Familial Mediterranean fever (FMF) is a recessively inherited disorder characterized by attacks of fever and serositis, which affects primarily non-Ashkenazi Jews, Armenians, Turks, and Arabs. We present here a transcriptional map covering the FMF locus that we constructed in the course of the positional cloning of the gene responsible for this disease. This map was established from a contig constructed with YAC, BAC, and cosmid clones and covers about 500 kb of 16p13.3. It contains nine transcriptional units corresponding to known genes or to genes belonging to known gene families, 23 gene fragments characterized by partial sequences, and an endogenous retrovirus sequence. It thus considerably increases the number of genes in this interval and improves our knowledge concerning some of the genes or gene families present in this region. Data accumulated in this region were also used in a comparative study of different methods of exon detection.
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- 1998
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