An investigation of NFXL1, a gene implicated in a study of specific language impairment / R. NUDEL in Journal of Neurodevelopmental Disorders, 8-1 (December 2016)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 8-1 (December 2016) . - p.13 Titre : An investigation of NFXL1, a gene implicated in a study of specific language impairment Type de document : Texte imprimé et/ou numérique Auteurs : R. NUDEL, Auteur Article en page(s) : p.13 Langues : Anglais (eng) Mots-clés : Cerebellum  Language disorder  Nfxl1  Neurodevelopment  Neurogenetics  Specific language impairment  Transcription factor Index. décimale : PER Périodiques Résumé : BACKGROUND: A recent study identified NFXL1 as a candidate gene for specific language impairment. The protein encoded by this gene is predicted to be a transcription factor based on domain similarities with NFX1, a repressor of HLA class II genes, which have themselves been implicated in specific language impairment. However, there is very little literature on the function of NFXL1. METHODS: This report describes a study of NFXL1 expression in several human tissues and an investigation of differential expression in several specific brain regions through quantitative PCR as well as a study of the protein's sub-cellular localization in HEK cells and SH-SY5Y cells through immunofluorescence. RESULTS: The NFXL1 transcript was found in all investigated tissues. In the brain, a high level of NFXL1 expression was found in the cerebellum. An analysis of the sub-cellular localization of the protein showed a cytoplasmic pattern in the investigated cells. CONCLUSIONS: The NFXL1 transcript was present in samples from different tissues; in the brain, a high expression level was found in a region implicated in some language-related pathologies. NFXL1 did not show nuclear localization, suggesting that, if it regulates transcription, certain conditions may be required for it to translocate to the nucleus. En ligne : http://dx.doi.org/10.1186/s11689-016-9146-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=348 [article] An investigation of NFXL1, a gene implicated in a study of specific language impairment [Texte imprimé et/ou numérique] / R. NUDEL, Auteur . - p.13. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 8-1 (December 2016) . - p.13 Mots-clés : Cerebellum  Language disorder  Nfxl1  Neurodevelopment  Neurogenetics  Specific language impairment  Transcription factor Index. décimale : PER Périodiques Résumé : BACKGROUND: A recent study identified NFXL1 as a candidate gene for specific language impairment. The protein encoded by this gene is predicted to be a transcription factor based on domain similarities with NFX1, a repressor of HLA class II genes, which have themselves been implicated in specific language impairment. However, there is very little literature on the function of NFXL1. METHODS: This report describes a study of NFXL1 expression in several human tissues and an investigation of differential expression in several specific brain regions through quantitative PCR as well as a study of the protein's sub-cellular localization in HEK cells and SH-SY5Y cells through immunofluorescence. RESULTS: The NFXL1 transcript was found in all investigated tissues. In the brain, a high level of NFXL1 expression was found in the cerebellum. An analysis of the sub-cellular localization of the protein showed a cytoplasmic pattern in the investigated cells. CONCLUSIONS: The NFXL1 transcript was present in samples from different tissues; in the brain, a high expression level was found in a region implicated in some language-related pathologies. NFXL1 did not show nuclear localization, suggesting that, if it regulates transcription, certain conditions may be required for it to translocate to the nucleus. En ligne : http://dx.doi.org/10.1186/s11689-016-9146-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=348

Associations of HLA alleles with specific language impairment / R. NUDEL in Journal of Neurodevelopmental Disorders, 6-1 (December 2014)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 6-1 (December 2014) . - p.1 Titre : Associations of HLA alleles with specific language impairment Type de document : Texte imprimé et/ou numérique Auteurs : R. NUDEL, Auteur ; N. H. SIMPSON, Auteur ; Gillian BAIRD, Auteur ; A. O'HARE, Auteur ; G. CONTI-RAMSDEN, Auteur ; Patrick BOLTON, Auteur ; E. R. HENNESSY, Auteur ; A. P. MONACO, Auteur ; J. C. KNIGHT, Auteur ; B. WINNEY, Auteur ; S. E. FISHER, Auteur ; D. F. NEWBURY, Auteur Article en page(s) : p.1 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : BACKGROUND: Human leukocyte antigen (HLA) loci have been implicated in several neurodevelopmental disorders in which language is affected. However, to date, no studies have investigated the possible involvement of HLA loci in specific language impairment (SLI), a disorder that is defined primarily upon unexpected language impairment. We report association analyses of single-nucleotide polymorphisms (SNPs) and HLA types in a cohort of individuals affected by language impairment. METHODS: We perform quantitative association analyses of three linguistic measures and case-control association analyses using both SNP data and imputed HLA types. RESULTS: Quantitative association analyses of imputed HLA types suggested a role for the HLA-A locus in susceptibility to SLI. HLA-A A1 was associated with a measure of short-term memory (P = 0.004) and A3 with expressive language ability (P = 0.006). Parent-of-origin effects were found between HLA-B B8 and HLA-DQA1*0501 and receptive language. These alleles have a negative correlation with receptive language ability when inherited from the mother (P = 0.021, P = 0.034, respectively) but are positively correlated with the same trait when paternally inherited (P = 0.013, P = 0.029, respectively). Finally, case control analyses using imputed HLA types indicated that the DR10 allele of HLA-DRB1 was more frequent in individuals with SLI than population controls (P = 0.004, relative risk = 2.575), as has been reported for individuals with attention deficit hyperactivity disorder (ADHD). CONCLUSION: These preliminary data provide an intriguing link to those described by previous studies of other neurodevelopmental disorders and suggest a possible role for HLA loci in language disorders. En ligne : http://dx.doi.org/10.1186/1866-1955-6-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=345 [article] Associations of HLA alleles with specific language impairment [Texte imprimé et/ou numérique] / R. NUDEL, Auteur ; N. H. SIMPSON, Auteur ; Gillian BAIRD, Auteur ; A. O'HARE, Auteur ; G. CONTI-RAMSDEN, Auteur ; Patrick BOLTON, Auteur ; E. R. HENNESSY, Auteur ; A. P. MONACO, Auteur ; J. C. KNIGHT, Auteur ; B. WINNEY, Auteur ; S. E. FISHER, Auteur ; D. F. NEWBURY, Auteur . - p.1. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 6-1 (December 2014) . - p.1 Index. décimale : PER Périodiques Résumé : BACKGROUND: Human leukocyte antigen (HLA) loci have been implicated in several neurodevelopmental disorders in which language is affected. However, to date, no studies have investigated the possible involvement of HLA loci in specific language impairment (SLI), a disorder that is defined primarily upon unexpected language impairment. We report association analyses of single-nucleotide polymorphisms (SNPs) and HLA types in a cohort of individuals affected by language impairment. METHODS: We perform quantitative association analyses of three linguistic measures and case-control association analyses using both SNP data and imputed HLA types. RESULTS: Quantitative association analyses of imputed HLA types suggested a role for the HLA-A locus in susceptibility to SLI. HLA-A A1 was associated with a measure of short-term memory (P = 0.004) and A3 with expressive language ability (P = 0.006). Parent-of-origin effects were found between HLA-B B8 and HLA-DQA1*0501 and receptive language. These alleles have a negative correlation with receptive language ability when inherited from the mother (P = 0.021, P = 0.034, respectively) but are positively correlated with the same trait when paternally inherited (P = 0.013, P = 0.029, respectively). Finally, case control analyses using imputed HLA types indicated that the DR10 allele of HLA-DRB1 was more frequent in individuals with SLI than population controls (P = 0.004, relative risk = 2.575), as has been reported for individuals with attention deficit hyperactivity disorder (ADHD). CONCLUSION: These preliminary data provide an intriguing link to those described by previous studies of other neurodevelopmental disorders and suggest a possible role for HLA loci in language disorders. En ligne : http://dx.doi.org/10.1186/1866-1955-6-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=345

Further evidence for a parent-of-origin effect at the NOP9 locus on language-related phenotypes / K. A. PETTIGREW in Journal of Neurodevelopmental Disorders, 8-1 (December 2016)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 8-1 (December 2016) . - p.24 Titre : Further evidence for a parent-of-origin effect at the NOP9 locus on language-related phenotypes Type de document : Texte imprimé et/ou numérique Auteurs : K. A. PETTIGREW, Auteur ; E. FRINTON, Auteur ; R. NUDEL, Auteur ; M. T. M. CHAN, Auteur ; P. THOMPSON, Auteur ; M. E. HAYIOU-THOMAS, Auteur ; J. B. TALCOTT, Auteur ; J. STEIN, Auteur ; A. P. MONACO, Auteur ; C. HULME, Auteur ; M. J. SNOWLING, Auteur ; D. F. NEWBURY, Auteur ; S. PARACCHINI, Auteur Article en page(s) : p.24 Langues : Anglais (eng) Mots-clés : Candidate gene  Dyslexia  Genetic association  Language impairment  Parent-of-origin Index. décimale : PER Périodiques Résumé : BACKGROUND: Specific language impairment (SLI) is a common neurodevelopmental disorder, observed in 5-10 % of children. Family and twin studies suggest a strong genetic component, but relatively few candidate genes have been reported to date. A recent genome-wide association study (GWAS) described the first statistically significant association specifically for a SLI cohort between a missense variant (rs4280164) in the NOP9 gene and language-related phenotypes under a parent-of-origin model. Replications of these findings are particularly challenging because the availability of parental DNA is required. METHODS: We used two independent family-based cohorts characterised with reading- and language-related traits: a longitudinal cohort (n = 106 informative families) including children with language and reading difficulties and a nuclear family cohort (n = 264 families) selected for dyslexia. RESULTS: We observed association with language-related measures when modelling for parent-of-origin effects at the NOP9 locus in both cohorts: minimum P = 0.001 for phonological awareness with a paternal effect in the first cohort and minimum P = 0.0004 for irregular word reading with a maternal effect in the second cohort. Allelic and parental trends were not consistent when compared to the original study. CONCLUSIONS: A parent-of-origin effect at this locus was detected in both cohorts, albeit with different trends. These findings contribute in interpreting the original GWAS report and support further investigations of the NOP9 locus and its role in language-related traits. A systematic evaluation of parent-of-origin effects in genetic association studies has the potential to reveal novel mechanisms underlying complex traits. En ligne : http://dx.doi.org/10.1186/s11689-016-9157-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=349 [article] Further evidence for a parent-of-origin effect at the NOP9 locus on language-related phenotypes [Texte imprimé et/ou numérique] / K. A. PETTIGREW, Auteur ; E. FRINTON, Auteur ; R. NUDEL, Auteur ; M. T. M. CHAN, Auteur ; P. THOMPSON, Auteur ; M. E. HAYIOU-THOMAS, Auteur ; J. B. TALCOTT, Auteur ; J. STEIN, Auteur ; A. P. MONACO, Auteur ; C. HULME, Auteur ; M. J. SNOWLING, Auteur ; D. F. NEWBURY, Auteur ; S. PARACCHINI, Auteur . - p.24. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 8-1 (December 2016) . - p.24 Mots-clés : Candidate gene  Dyslexia  Genetic association  Language impairment  Parent-of-origin Index. décimale : PER Périodiques Résumé : BACKGROUND: Specific language impairment (SLI) is a common neurodevelopmental disorder, observed in 5-10 % of children. Family and twin studies suggest a strong genetic component, but relatively few candidate genes have been reported to date. A recent genome-wide association study (GWAS) described the first statistically significant association specifically for a SLI cohort between a missense variant (rs4280164) in the NOP9 gene and language-related phenotypes under a parent-of-origin model. Replications of these findings are particularly challenging because the availability of parental DNA is required. METHODS: We used two independent family-based cohorts characterised with reading- and language-related traits: a longitudinal cohort (n = 106 informative families) including children with language and reading difficulties and a nuclear family cohort (n = 264 families) selected for dyslexia. RESULTS: We observed association with language-related measures when modelling for parent-of-origin effects at the NOP9 locus in both cohorts: minimum P = 0.001 for phonological awareness with a paternal effect in the first cohort and minimum P = 0.0004 for irregular word reading with a maternal effect in the second cohort. Allelic and parental trends were not consistent when compared to the original study. CONCLUSIONS: A parent-of-origin effect at this locus was detected in both cohorts, albeit with different trends. These findings contribute in interpreting the original GWAS report and support further investigations of the NOP9 locus and its role in language-related traits. A systematic evaluation of parent-of-origin effects in genetic association studies has the potential to reveal novel mechanisms underlying complex traits. En ligne : http://dx.doi.org/10.1186/s11689-016-9157-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=349

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