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Annual Research Review: Epigenetic mechanisms and environmental shaping of the brain during sensitive periods of development / Tania L. ROTH in Journal of Child Psychology and Psychiatry, 52-4 (April 2011)
[article]
Titre : Annual Research Review: Epigenetic mechanisms and environmental shaping of the brain during sensitive periods of development Type de document : Texte imprimé et/ou numérique Auteurs : Tania L. ROTH, Auteur ; J. David SWEATT, Auteur Année de publication : 2011 Article en page(s) : p.398-408 Langues : Anglais (eng) Mots-clés : Early-life experience maternal care epigenetic DNA methylation histone modification Index. décimale : PER Périodiques Résumé : Experiences during early development profoundly affect development of the central nervous system (CNS) to impart either risk for or resilience to later psychopathology. Work in the developmental neuroscience field is providing compelling data that epigenetic marking of the genome may underlie aspects of this process. Experiments in rodents continue to show that experiences during sensitive periods of development influence DNA methylation patterns of several genes. These experience-induced DNA methylation patterns represent stable epigenetic modifications that alter gene transcription throughout the lifespan and promote specific behavioral outcomes. We discuss the relevance of these findings to humans, and also briefly discuss these findings in the broader contexts of cognition and psychiatric disorder. We conclude by discussing the implications of these observations for future research. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2010.02282.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=119
in Journal of Child Psychology and Psychiatry > 52-4 (April 2011) . - p.398-408[article] Annual Research Review: Epigenetic mechanisms and environmental shaping of the brain during sensitive periods of development [Texte imprimé et/ou numérique] / Tania L. ROTH, Auteur ; J. David SWEATT, Auteur . - 2011 . - p.398-408.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 52-4 (April 2011) . - p.398-408
Mots-clés : Early-life experience maternal care epigenetic DNA methylation histone modification Index. décimale : PER Périodiques Résumé : Experiences during early development profoundly affect development of the central nervous system (CNS) to impart either risk for or resilience to later psychopathology. Work in the developmental neuroscience field is providing compelling data that epigenetic marking of the genome may underlie aspects of this process. Experiments in rodents continue to show that experiences during sensitive periods of development influence DNA methylation patterns of several genes. These experience-induced DNA methylation patterns represent stable epigenetic modifications that alter gene transcription throughout the lifespan and promote specific behavioral outcomes. We discuss the relevance of these findings to humans, and also briefly discuss these findings in the broader contexts of cognition and psychiatric disorder. We conclude by discussing the implications of these observations for future research. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2010.02282.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=119 Early adversities accelerate epigenetic aging into adulthood: a 10-year, within-subject analysis / William E. COPELAND in Journal of Child Psychology and Psychiatry, 63-11 (November 2022)
[article]
Titre : Early adversities accelerate epigenetic aging into adulthood: a 10-year, within-subject analysis Type de document : Texte imprimé et/ou numérique Auteurs : William E. COPELAND, Auteur ; Lilly SHANAHAN, Auteur ; Ellen W. MCGINNIS, Auteur ; Karolina A. ABERG, Auteur ; Edwin J. C. G. VAN DEN OORD, Auteur Article en page(s) : p.1308-1315 Langues : Anglais (eng) Mots-clés : Adolescent Humans Child Young Adult Adult Cross-Sectional Studies Risk Factors Anxiety Disorders Aging/genetics Epigenesis, Genetic Childhood DNA methylation adversity aging epigenetic longitudinal Index. décimale : PER Périodiques Résumé : BACKGROUND: Longitudinal studies are needed to clarify whether early adversities are associated with advanced methylation age or if they actually accelerate methylation aging. This study test whether different dimensions of childhood adversity accelerate biological aging from childhood to adulthood, and, if so, via which mechanisms. METHODS: 381 participants provided one blood sample in childhood (average age 15.0; SD=2.3) and another in young adulthood (average age 23.1; SD=2.8). Participants and their parents provided a median of 6 childhood assessments (total=1,950 childhood observations), reporting exposures to different types of adversity dimensions (i.e. threat, material deprivation, loss, unpredictability). The blood samples were assayed to estimate DNA methylation age in both childhood and adulthood and also change in methylation age across this period. RESULTS: Cross-sectional associations between the childhood adversity dimensions and childhood measures of methylation age were non-significant. In contrast, multiple adversity dimensions were associated with accelerated within-person change in methylation age from adolescence to young adulthood. These associations attenuated in model testing all dimensions at the same time. Accelerated aging increased with increasing number of childhood adversities: Individuals with highest number of adversities experienced 2+ additional years of methylation aging compared to those with no exposure to childhood adversities. The association between total childhood adversity exposure and accelerated aging was partially explained by childhood depressive symptoms, but not anxiety or behavioral symptoms. CONCLUSIONS: Early adversities accelerate epigenetic aging long after they occur, in proportion to the total number of such experiences, and in a manner consistent with a shared effect that crosses multiple early dimensions of risk. En ligne : http://dx.doi.org/10.1111/jcpp.13575 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=490
in Journal of Child Psychology and Psychiatry > 63-11 (November 2022) . - p.1308-1315[article] Early adversities accelerate epigenetic aging into adulthood: a 10-year, within-subject analysis [Texte imprimé et/ou numérique] / William E. COPELAND, Auteur ; Lilly SHANAHAN, Auteur ; Ellen W. MCGINNIS, Auteur ; Karolina A. ABERG, Auteur ; Edwin J. C. G. VAN DEN OORD, Auteur . - p.1308-1315.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 63-11 (November 2022) . - p.1308-1315
Mots-clés : Adolescent Humans Child Young Adult Adult Cross-Sectional Studies Risk Factors Anxiety Disorders Aging/genetics Epigenesis, Genetic Childhood DNA methylation adversity aging epigenetic longitudinal Index. décimale : PER Périodiques Résumé : BACKGROUND: Longitudinal studies are needed to clarify whether early adversities are associated with advanced methylation age or if they actually accelerate methylation aging. This study test whether different dimensions of childhood adversity accelerate biological aging from childhood to adulthood, and, if so, via which mechanisms. METHODS: 381 participants provided one blood sample in childhood (average age 15.0; SD=2.3) and another in young adulthood (average age 23.1; SD=2.8). Participants and their parents provided a median of 6 childhood assessments (total=1,950 childhood observations), reporting exposures to different types of adversity dimensions (i.e. threat, material deprivation, loss, unpredictability). The blood samples were assayed to estimate DNA methylation age in both childhood and adulthood and also change in methylation age across this period. RESULTS: Cross-sectional associations between the childhood adversity dimensions and childhood measures of methylation age were non-significant. In contrast, multiple adversity dimensions were associated with accelerated within-person change in methylation age from adolescence to young adulthood. These associations attenuated in model testing all dimensions at the same time. Accelerated aging increased with increasing number of childhood adversities: Individuals with highest number of adversities experienced 2+ additional years of methylation aging compared to those with no exposure to childhood adversities. The association between total childhood adversity exposure and accelerated aging was partially explained by childhood depressive symptoms, but not anxiety or behavioral symptoms. CONCLUSIONS: Early adversities accelerate epigenetic aging long after they occur, in proportion to the total number of such experiences, and in a manner consistent with a shared effect that crosses multiple early dimensions of risk. En ligne : http://dx.doi.org/10.1111/jcpp.13575 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=490 Methylomic analysis of salivary DNA in childhood ADHD identifies altered DNA methylation in VIPR2 / Beth WILMOT in Journal of Child Psychology and Psychiatry, 57-2 (February 2016)
[article]
Titre : Methylomic analysis of salivary DNA in childhood ADHD identifies altered DNA methylation in VIPR2 Type de document : Texte imprimé et/ou numérique Auteurs : Beth WILMOT, Auteur ; Rebecca FRY, Auteur ; Lisa SMEESTER, Auteur ; Erica D. MUSSER, Auteur ; Jonathan MILL, Auteur ; Joel T. NIGG, Auteur Article en page(s) : p.152-160 Langues : Anglais (eng) Mots-clés : ADHD methylation epigenetic Index. décimale : PER Périodiques Résumé : Background Peripheral epigenetic marks hold promise for understanding psychiatric illness and may represent fingerprints of gene–environment interactions. We conducted an initial examination of CpG methylation variation in children with or without attention-deficit/hyperactivity disorder (ADHD). Methods Children age 7–12 were recruited, screened, evaluated and assigned to ADHD or non-ADHD groups by defined research criteria. Two independent age-matched samples were examined, a discovery set (n = 92, all boys, half control, half ADHD) and a confirmation set (n = 20, half ADHD, all boys). 5-methylcytosine levels were quantified in salivary DNA using the Illumina 450 K HumanMethylation array. Genes for which multiple probes were nominally significant and had a beta difference of at least 2% were evaluated for biological relevance and prioritized for confirmation and sequence validation. Gene pathways were explored and described. Results Two genes met the criteria for confirmation testing, VIPR2 and MYT1L; both had multiple probes meeting cutoffs and strong biological relevance. Probes on VIPR2 passed FDR correction in the confirmation set and were confirmed through bisulfite sequencing. Enrichment analysis suggested involvement of gene sets or pathways related to inflammatory processes and modulation of monoamine and cholinergic neurotransmission. Conclusions Although it is unknown to what extent CpG methylation seen in peripheral tissue reflect transcriptomic changes in the brain, these initial results indicate that peripheral DNA methylation markers in ADHD may be promising and suggest targeted hypotheses for future study in larger samples. En ligne : http://dx.doi.org/10.1111/jcpp.12457 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=280
in Journal of Child Psychology and Psychiatry > 57-2 (February 2016) . - p.152-160[article] Methylomic analysis of salivary DNA in childhood ADHD identifies altered DNA methylation in VIPR2 [Texte imprimé et/ou numérique] / Beth WILMOT, Auteur ; Rebecca FRY, Auteur ; Lisa SMEESTER, Auteur ; Erica D. MUSSER, Auteur ; Jonathan MILL, Auteur ; Joel T. NIGG, Auteur . - p.152-160.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 57-2 (February 2016) . - p.152-160
Mots-clés : ADHD methylation epigenetic Index. décimale : PER Périodiques Résumé : Background Peripheral epigenetic marks hold promise for understanding psychiatric illness and may represent fingerprints of gene–environment interactions. We conducted an initial examination of CpG methylation variation in children with or without attention-deficit/hyperactivity disorder (ADHD). Methods Children age 7–12 were recruited, screened, evaluated and assigned to ADHD or non-ADHD groups by defined research criteria. Two independent age-matched samples were examined, a discovery set (n = 92, all boys, half control, half ADHD) and a confirmation set (n = 20, half ADHD, all boys). 5-methylcytosine levels were quantified in salivary DNA using the Illumina 450 K HumanMethylation array. Genes for which multiple probes were nominally significant and had a beta difference of at least 2% were evaluated for biological relevance and prioritized for confirmation and sequence validation. Gene pathways were explored and described. Results Two genes met the criteria for confirmation testing, VIPR2 and MYT1L; both had multiple probes meeting cutoffs and strong biological relevance. Probes on VIPR2 passed FDR correction in the confirmation set and were confirmed through bisulfite sequencing. Enrichment analysis suggested involvement of gene sets or pathways related to inflammatory processes and modulation of monoamine and cholinergic neurotransmission. Conclusions Although it is unknown to what extent CpG methylation seen in peripheral tissue reflect transcriptomic changes in the brain, these initial results indicate that peripheral DNA methylation markers in ADHD may be promising and suggest targeted hypotheses for future study in larger samples. En ligne : http://dx.doi.org/10.1111/jcpp.12457 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=280 The contribution of epigenetics to understanding genetic factors in autism / Layla HALL in Autism, 18-8 (November 2014)
[article]
Titre : The contribution of epigenetics to understanding genetic factors in autism Type de document : Texte imprimé et/ou numérique Auteurs : Layla HALL, Auteur ; Elizabeth KELLEY, Auteur Article en page(s) : p.872-881 Langues : Anglais (eng) Mots-clés : autism autism spectrum disorder epigenetic genetic Index. décimale : PER Périodiques Résumé : Autism spectrum disorder is a grouping of neurodevelopmental disorders characterized by deficits in social communication and language, as well as by repetitive and stereotyped behaviors. While the environment is believed to play a role in the development of autism spectrum disorder, there is now strong evidence for a genetic link to autism. Despite such evidence, studies investigating a potential single-gene cause for autism, although insightful, have been highly inconclusive. A consideration of an epigenetic approach proves to be very promising in clarifying genetic factors involved in autism. The present article is intended to provide a review of key findings pertaining to epigenetics in autism in such a way that a broader audience of individuals who do not have a strong background in genetics may better understand this highly specific and scientific content. Epigenetics refers to non-permanent heritable changes that alter expression of genes without altering the DNA sequence itself and considers the role of environment in this modulation of gene expression. This review provides a brief description of epigenetic processes, highlights evidence in the literature of epigenetic dysregulation in autism, and makes use of noteworthy findings to illustrate how a consideration of epigenetic factors can deepen our understanding of the development of autism. Furthermore, this discussion will present a promising new way for moving forward in the investigation of genetic factors within autism. En ligne : http://dx.doi.org/10.1177/1362361313503501 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=242
in Autism > 18-8 (November 2014) . - p.872-881[article] The contribution of epigenetics to understanding genetic factors in autism [Texte imprimé et/ou numérique] / Layla HALL, Auteur ; Elizabeth KELLEY, Auteur . - p.872-881.
Langues : Anglais (eng)
in Autism > 18-8 (November 2014) . - p.872-881
Mots-clés : autism autism spectrum disorder epigenetic genetic Index. décimale : PER Périodiques Résumé : Autism spectrum disorder is a grouping of neurodevelopmental disorders characterized by deficits in social communication and language, as well as by repetitive and stereotyped behaviors. While the environment is believed to play a role in the development of autism spectrum disorder, there is now strong evidence for a genetic link to autism. Despite such evidence, studies investigating a potential single-gene cause for autism, although insightful, have been highly inconclusive. A consideration of an epigenetic approach proves to be very promising in clarifying genetic factors involved in autism. The present article is intended to provide a review of key findings pertaining to epigenetics in autism in such a way that a broader audience of individuals who do not have a strong background in genetics may better understand this highly specific and scientific content. Epigenetics refers to non-permanent heritable changes that alter expression of genes without altering the DNA sequence itself and considers the role of environment in this modulation of gene expression. This review provides a brief description of epigenetic processes, highlights evidence in the literature of epigenetic dysregulation in autism, and makes use of noteworthy findings to illustrate how a consideration of epigenetic factors can deepen our understanding of the development of autism. Furthermore, this discussion will present a promising new way for moving forward in the investigation of genetic factors within autism. En ligne : http://dx.doi.org/10.1177/1362361313503501 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=242 A pilot study of high-dose intravenous immunoglobulin 5% for autism: Impact on autism spectrum and markers of neuroinflammation / I. R. MELAMED in Autism Research, 11-3 (March 2018)
[article]
Titre : A pilot study of high-dose intravenous immunoglobulin 5% for autism: Impact on autism spectrum and markers of neuroinflammation Type de document : Texte imprimé et/ou numérique Auteurs : I. R. MELAMED, Auteur ; M. HEFFRON, Auteur ; A. TESTORI, Auteur ; K. LIPE, Auteur Article en page(s) : p.421-433 Langues : Anglais (eng) Mots-clés : autism spectrum disorder epigenetic innate immunity intravenous immunoglobulin neuroinflammation Index. décimale : PER Périodiques Résumé : Research has shown that a subset of the autism spectrum disorder (ASD) population presents with immune dysregulation. To explore this topic further, we investigated the efficacy and tolerability of intravenous immunoglobulin (IVIG) infusion in children with ASD. In this study, participants were recruited based on a diagnosis of autistic disorder, Asperger's disorder, or pervasive developmental disorder not otherwise specified. Participants also showed evidence of immune dysfunction based on abnormal levels of specific biomarkers, including CD40 ligand (CD154), lymphocyte stimulation, and T or B cell dysfunction. Of 17 screened patients, 14 completed the trial and received IVIG treatment (1 g/kg dose) for ten 21-day treatment cycles. The primary endpoint was disease improvement assessed using standardized cognitive and behavioral tests (Children's Communication Checklist [CCC-2], Social Responsiveness Scale [SRS], Aberrant Behavior Checklist [ABC], Clinical Global Impressions-Severity [CGI-S] and -Improvement [CGI-I], Autism Diagnostic Observation Schedule [ADOS], and Peabody Picture Vocabulary Test [PPVT]). Secondary endpoints included experimental biomarkers such as CD154, toll-like receptor-4, memory B cells, FOXP3, and lymphocyte stimulation. Significant improvements from baseline to study endpoint were observed in several subscales of the CCC-2, SRS, CGI-I, CGI-S, and ADOS, including Associated Maladaptive Behaviors (P = .043), Reciprocal Social Interaction (P = .015), Communication (P < .001), and Stereotyped Behaviors and Repetitive Interests (P = .013). Statistically significant reductions were also seen in numerous secondary outcomes of immunological biomarkers indicative of neuroinflammation. IVIG was well tolerated; no subjects withdrew due to an adverse event, and clinical data showed no evidence of thromboembolic events. Autism Res 2018, 11: 421-433. (c) 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Since research has demonstrated a link between autism spectrum disorder (ASD) and immune dysfunction, this study investigated the efficacy and tolerability of intravenous immunoglobulin (IVIG) infusion in children with ASD. Fourteen patients received IVIG treatment and were assessed using standardized cognitive and behavioral tests. Following treatment with IVIG, significant improvement was observed across several subscales of the clinical tests and significant reductions were seen in the markers of neuroinflammation. These data suggest that inflammatory etiologies may play a role in select cases of autism, and IVIG treatment may exert a positive impact on behaviors and markers of inflammation in ASD. En ligne : http://dx.doi.org/10.1002/aur.1906 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=352
in Autism Research > 11-3 (March 2018) . - p.421-433[article] A pilot study of high-dose intravenous immunoglobulin 5% for autism: Impact on autism spectrum and markers of neuroinflammation [Texte imprimé et/ou numérique] / I. R. MELAMED, Auteur ; M. HEFFRON, Auteur ; A. TESTORI, Auteur ; K. LIPE, Auteur . - p.421-433.
Langues : Anglais (eng)
in Autism Research > 11-3 (March 2018) . - p.421-433
Mots-clés : autism spectrum disorder epigenetic innate immunity intravenous immunoglobulin neuroinflammation Index. décimale : PER Périodiques Résumé : Research has shown that a subset of the autism spectrum disorder (ASD) population presents with immune dysregulation. To explore this topic further, we investigated the efficacy and tolerability of intravenous immunoglobulin (IVIG) infusion in children with ASD. In this study, participants were recruited based on a diagnosis of autistic disorder, Asperger's disorder, or pervasive developmental disorder not otherwise specified. Participants also showed evidence of immune dysfunction based on abnormal levels of specific biomarkers, including CD40 ligand (CD154), lymphocyte stimulation, and T or B cell dysfunction. Of 17 screened patients, 14 completed the trial and received IVIG treatment (1 g/kg dose) for ten 21-day treatment cycles. The primary endpoint was disease improvement assessed using standardized cognitive and behavioral tests (Children's Communication Checklist [CCC-2], Social Responsiveness Scale [SRS], Aberrant Behavior Checklist [ABC], Clinical Global Impressions-Severity [CGI-S] and -Improvement [CGI-I], Autism Diagnostic Observation Schedule [ADOS], and Peabody Picture Vocabulary Test [PPVT]). Secondary endpoints included experimental biomarkers such as CD154, toll-like receptor-4, memory B cells, FOXP3, and lymphocyte stimulation. Significant improvements from baseline to study endpoint were observed in several subscales of the CCC-2, SRS, CGI-I, CGI-S, and ADOS, including Associated Maladaptive Behaviors (P = .043), Reciprocal Social Interaction (P = .015), Communication (P < .001), and Stereotyped Behaviors and Repetitive Interests (P = .013). Statistically significant reductions were also seen in numerous secondary outcomes of immunological biomarkers indicative of neuroinflammation. IVIG was well tolerated; no subjects withdrew due to an adverse event, and clinical data showed no evidence of thromboembolic events. Autism Res 2018, 11: 421-433. (c) 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Since research has demonstrated a link between autism spectrum disorder (ASD) and immune dysfunction, this study investigated the efficacy and tolerability of intravenous immunoglobulin (IVIG) infusion in children with ASD. Fourteen patients received IVIG treatment and were assessed using standardized cognitive and behavioral tests. Following treatment with IVIG, significant improvement was observed across several subscales of the clinical tests and significant reductions were seen in the markers of neuroinflammation. These data suggest that inflammatory etiologies may play a role in select cases of autism, and IVIG treatment may exert a positive impact on behaviors and markers of inflammation in ASD. En ligne : http://dx.doi.org/10.1002/aur.1906 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=352