5 recherche sur le mot-clé 'glutathione'

Cortical and subcortical glutathione levels in adults with autism spectrum disorder / Alice M.S. DURIEUX in Autism Research, 9-4 (April 2016)  

Public ISBD [article]  inAutism Research > 9-4 (April 2016) . - p.429-435 Titre : Cortical and subcortical glutathione levels in adults with autism spectrum disorder Type de document : texte imprimé Auteurs : Alice M.S. DURIEUX, Auteur ; Jamie HORDER, Auteur ; M. Andreina MENDEZ, Auteur ; Alice EGERTON, Auteur ; Steve C.R. WILLIAMS, Auteur ; C. Ellie WILSON, Auteur ; Debbie SPAIN, Auteur ; Clodagh M. MURPHY, Auteur ; Dene ROBERTSON, Auteur ; Gareth J. BARKER, Auteur ; Declan G.M. MURPHY, Auteur ; Gráinne M. MCALONAN, Auteur Article en page(s) : p.429-435 Langues : Anglais (eng) Mots-clés : autism  magnetic resonance spectroscopy  glutathione  oxidative stress  redox Index. décimale : PER Périodiques Résumé : Increased oxidative stress has been postulated to contribute to the pathogenesis of autism spectrum disorder (ASD). However, reports of alterations in oxidation markers including glutathione (GSH), the major endogenous antioxidant, are indirect, coming from blood plasma level measurements and postmortem studies. Therefore we used in-vivo 3 Tesla proton magnetic resonance spectroscopy ([1H]MRS) to directly measure GSH concentrations in the basal ganglia (BG) and the dorsomedial prefrontal cortex of 21 normally intelligent adult males with ASD and 29 controls who did not differ in age or IQ. There was no difference in brain GSH between patients and controls in either brain area; neither did GSH levels correlate with measures of clinical severity in patients. Thus [1H]MRS measures of cortical and subcortical GSH are not a biomarker for ASD in intellectually able adult men. Autism Res 2016, 9: 429–435. © 2015 The Authors Autism Research published by Wiley Periodicals, Inc. on behalf of International Society for Autism Research. En ligne : http://dx.doi.org/10.1002/aur.1522 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=287 [article] Cortical and subcortical glutathione levels in adults with autism spectrum disorder [texte imprimé] / Alice M.S. DURIEUX, Auteur ; Jamie HORDER, Auteur ; M. Andreina MENDEZ, Auteur ; Alice EGERTON, Auteur ; Steve C.R. WILLIAMS, Auteur ; C. Ellie WILSON, Auteur ; Debbie SPAIN, Auteur ; Clodagh M. MURPHY, Auteur ; Dene ROBERTSON, Auteur ; Gareth J. BARKER, Auteur ; Declan G.M. MURPHY, Auteur ; Gráinne M. MCALONAN, Auteur . - p.429-435. Langues : Anglais (eng) in Autism Research > 9-4 (April 2016) . - p.429-435 Mots-clés : autism  magnetic resonance spectroscopy  glutathione  oxidative stress  redox Index. décimale : PER Périodiques Résumé : Increased oxidative stress has been postulated to contribute to the pathogenesis of autism spectrum disorder (ASD). However, reports of alterations in oxidation markers including glutathione (GSH), the major endogenous antioxidant, are indirect, coming from blood plasma level measurements and postmortem studies. Therefore we used in-vivo 3 Tesla proton magnetic resonance spectroscopy ([1H]MRS) to directly measure GSH concentrations in the basal ganglia (BG) and the dorsomedial prefrontal cortex of 21 normally intelligent adult males with ASD and 29 controls who did not differ in age or IQ. There was no difference in brain GSH between patients and controls in either brain area; neither did GSH levels correlate with measures of clinical severity in patients. Thus [1H]MRS measures of cortical and subcortical GSH are not a biomarker for ASD in intellectually able adult men. Autism Res 2016, 9: 429–435. © 2015 The Authors Autism Research published by Wiley Periodicals, Inc. on behalf of International Society for Autism Research. En ligne : http://dx.doi.org/10.1002/aur.1522 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=287

Specific Association Patterns Between Brain Glutathione Levels, Myelination, and Functional Connectivity in Adults With Autism Spectrum Disorder / Toshiki IWABUCHI in Autism Research, 18-12 (December 2025)  

Public ISBD [article]  inAutism Research > 18-12 (December 2025) . - p.2451-2462 Titre : Specific Association Patterns Between Brain Glutathione Levels, Myelination, and Functional Connectivity in Adults With Autism Spectrum Disorder Type de document : texte imprimé Auteurs : Toshiki IWABUCHI, Auteur ; Takaharu HIRAI, Auteur ; Naoko UMEDA, Auteur ; Hideto YOGO, Auteur ; Yuuta NISHIMIYA, Auteur ; Yuuki NISHIGAKI, Auteur ; Masaru WATANABE, Auteur ; Hidenori YAMASUE, Auteur ; Masatsugu TSUJII, Auteur ; Kenji J. TSUCHIYA, Auteur ; Hideo MATSUZAKI, Auteur Article en page(s) : p.2451-2462 Langues : Anglais (eng) Mots-clés : autism spectrum disorder  glutathione  magnetic resonance spectroscopy  myelin map  resting-state functional connectivity Index. décimale : PER Périodiques Résumé : ABSTRACT Recent studies have implicated oxidative stress in the pathophysiology of autism spectrum disorder (ASD). Postmortem brain studies have revealed decreased levels of the reduced form of glutathione (GSH), an important antioxidant, in some brain regions in individuals with ASD; however, in vivo evidence is lacking. Using proton magnetic resonance spectroscopy, T1-weighted/T2-weighted ratio-derived myelin maps, resting-state functional magnetic resonance imaging (MRI), and cognitive tasks, we examined whether brain GSH levels are lower in individuals with ASD than in those with typical development (TD) and explored ASD-specific association patterns between brain GSH levels, myelination, functional connectivity, and behavioral characteristics. Data from 30 adults with ASD and 27 adults with TD were analyzed. Contrary to our hypothesis, GSH levels in the left temporoparietal junction (TPJ) were higher in the ASD group than in the TD group. Using individual myelin maps, we found a significant group difference in the correlation between left middle frontal gyrus (MFG) myelination and left TPJ GSH levels. Multivariate pattern analysis of resting-state functional MRI revealed that whole-brain functional connectivity patterns from the left MFG differed between the groups in their association with left MFG myelination. Finally, we found a significant group difference in the correlation between emotion recognition ability and the functional connectivity of the left MFG with the bilateral occipitoparietal junction. In conclusion, our findings demonstrate an ASD-specific pattern of associations between left TPJ GSH levels, left MFG myelination, whole-brain functional connectivity patterns of the left MFG, and cognitive phenotype, which suggests compensatory neural mechanisms in ASD. En ligne : https://doi.org/10.1002/aur.70134 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=578 [article] Specific Association Patterns Between Brain Glutathione Levels, Myelination, and Functional Connectivity in Adults With Autism Spectrum Disorder [texte imprimé] / Toshiki IWABUCHI, Auteur ; Takaharu HIRAI, Auteur ; Naoko UMEDA, Auteur ; Hideto YOGO, Auteur ; Yuuta NISHIMIYA, Auteur ; Yuuki NISHIGAKI, Auteur ; Masaru WATANABE, Auteur ; Hidenori YAMASUE, Auteur ; Masatsugu TSUJII, Auteur ; Kenji J. TSUCHIYA, Auteur ; Hideo MATSUZAKI, Auteur . - p.2451-2462. Langues : Anglais (eng) in Autism Research > 18-12 (December 2025) . - p.2451-2462 Mots-clés : autism spectrum disorder  glutathione  magnetic resonance spectroscopy  myelin map  resting-state functional connectivity Index. décimale : PER Périodiques Résumé : ABSTRACT Recent studies have implicated oxidative stress in the pathophysiology of autism spectrum disorder (ASD). Postmortem brain studies have revealed decreased levels of the reduced form of glutathione (GSH), an important antioxidant, in some brain regions in individuals with ASD; however, in vivo evidence is lacking. Using proton magnetic resonance spectroscopy, T1-weighted/T2-weighted ratio-derived myelin maps, resting-state functional magnetic resonance imaging (MRI), and cognitive tasks, we examined whether brain GSH levels are lower in individuals with ASD than in those with typical development (TD) and explored ASD-specific association patterns between brain GSH levels, myelination, functional connectivity, and behavioral characteristics. Data from 30 adults with ASD and 27 adults with TD were analyzed. Contrary to our hypothesis, GSH levels in the left temporoparietal junction (TPJ) were higher in the ASD group than in the TD group. Using individual myelin maps, we found a significant group difference in the correlation between left middle frontal gyrus (MFG) myelination and left TPJ GSH levels. Multivariate pattern analysis of resting-state functional MRI revealed that whole-brain functional connectivity patterns from the left MFG differed between the groups in their association with left MFG myelination. Finally, we found a significant group difference in the correlation between emotion recognition ability and the functional connectivity of the left MFG with the bilateral occipitoparietal junction. In conclusion, our findings demonstrate an ASD-specific pattern of associations between left TPJ GSH levels, left MFG myelination, whole-brain functional connectivity patterns of the left MFG, and cognitive phenotype, which suggests compensatory neural mechanisms in ASD. En ligne : https://doi.org/10.1002/aur.70134 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=578

Biochemical Effects of Ribose and NADH Therapy in Children with Autism / Stuart H. FREEDENFELD in Autism Insights, 3 ([01/01/2011])  

Public ISBD [article]  inAutism Insights > 3 [01/01/2011] . - 11 p. Titre : Biochemical Effects of Ribose and NADH Therapy in Children with Autism Type de document : document électronique Auteurs : Stuart H. FREEDENFELD, Auteur ; Kim HAMADA, Auteur ; Tapan AUDHYA, Auteur ; James B. ADAMS, Auteur Année de publication : 2011 Article en page(s) : 11 p. Langues : Anglais (eng) Mots-clés : NADH  ribose  autism  mitochondria  glutathione  methylation  adenosine Index. décimale : PER Périodiques Résumé : Objectives: Several studies have previously indicated that children with autism often have abnormalities in methylation, glutathione redox, and mitochondrial function. A common feature of these abnormalities is that they are affected directly or indirectly by levels of ribose, reduced Nicotinamide Adenine Dinucleotide (NADH), reduced Nicotinamide Adenine Dinucleotide Phosphate (NADPH), and Adenosine-5’-triphosphate (ATP). The objective of this study was to investigate the possible biochemical effect of ribose therapy and NADH therapy on children with autism. Design: In a pilot study, ribose was administered orally to eight children with autism for two weeks, and NADH was administered orally to another group of eight children with autism for two weeks. Children were ages 3–9 years with clinical symptoms of low energy and/or low muscle tone. Eighteen biomarkers related to methylation (including S-adenosylmethionine (SAM)), glutathione (including the reduced form, GSH, and the oxidized form GSSG), adenosine triphosphate (ATP), and folic acid and were measured at the beginning and end of the therapy. Results: The NADH group had significant improvements in levels of ribose-5-phosphate, GSH, NADH, NADPH, and SAM. The Ribose group had significant improvements in ribose-5-phosphate, NADH, ATP, and folic acid. There was no significant change in GSSG in either group after two weeks. Conclusions: This small study suggests that both NADH and Ribose therapy results in some improvements in biochemistry, and may be beneficial for treating children with those abnormalities. Larger studies are recommended. En ligne : http://dx.doi.org/10.4137/AUI.S6947 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=131 [article] Biochemical Effects of Ribose and NADH Therapy in Children with Autism [document électronique] / Stuart H. FREEDENFELD, Auteur ; Kim HAMADA, Auteur ; Tapan AUDHYA, Auteur ; James B. ADAMS, Auteur . - 2011 . - 11 p. Langues : Anglais (eng) in Autism Insights > 3 [01/01/2011] . - 11 p. Mots-clés : NADH  ribose  autism  mitochondria  glutathione  methylation  adenosine Index. décimale : PER Périodiques Résumé : Objectives: Several studies have previously indicated that children with autism often have abnormalities in methylation, glutathione redox, and mitochondrial function. A common feature of these abnormalities is that they are affected directly or indirectly by levels of ribose, reduced Nicotinamide Adenine Dinucleotide (NADH), reduced Nicotinamide Adenine Dinucleotide Phosphate (NADPH), and Adenosine-5’-triphosphate (ATP). The objective of this study was to investigate the possible biochemical effect of ribose therapy and NADH therapy on children with autism. Design: In a pilot study, ribose was administered orally to eight children with autism for two weeks, and NADH was administered orally to another group of eight children with autism for two weeks. Children were ages 3–9 years with clinical symptoms of low energy and/or low muscle tone. Eighteen biomarkers related to methylation (including S-adenosylmethionine (SAM)), glutathione (including the reduced form, GSH, and the oxidized form GSSG), adenosine triphosphate (ATP), and folic acid and were measured at the beginning and end of the therapy. Results: The NADH group had significant improvements in levels of ribose-5-phosphate, GSH, NADH, NADPH, and SAM. The Ribose group had significant improvements in ribose-5-phosphate, NADH, ATP, and folic acid. There was no significant change in GSSG in either group after two weeks. Conclusions: This small study suggests that both NADH and Ribose therapy results in some improvements in biochemistry, and may be beneficial for treating children with those abnormalities. Larger studies are recommended. En ligne : http://dx.doi.org/10.4137/AUI.S6947 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=131

Prediction learning in adults with autism and its molecular correlates / Laurie-Anne SAPEY-TRIOMPHE in Molecular Autism, 12 (2021)  

Public ISBD [article]  inMolecular Autism > 12 (2021) . - 64 p. Titre : Prediction learning in adults with autism and its molecular correlates Type de document : texte imprimé Auteurs : Laurie-Anne SAPEY-TRIOMPHE, Auteur ; Joke TEMMERMAN, Auteur ; Nicolaas A.J. PUTS, Auteur ; Johan WAGEMANS, Auteur Article en page(s) : 64 p. Langues : Anglais (eng) Mots-clés : Asd  Gaba  Glutamate  Glutathione  Magnetic resonance spectroscopy  Prediction  Prior  Probabilistic learning  Uncertainty  Volatility Index. décimale : PER Périodiques Résumé : BACKGROUND: According to Bayesian hypotheses, individuals with Autism Spectrum Disorder (ASD) have difficulties making accurate predictions about their environment. In particular, the mechanisms by which they assign precision to predictions or sensory inputs would be suboptimal in ASD. These mechanisms are thought to be mostly mediated by glutamate and GABA. Here, we aimed to shed light on prediction learning in ASD and on its neurobiological correlates. METHODS: Twenty-six neurotypical and 26 autistic adults participated in an associative learning task where they had to learn a probabilistic association between a tone and the rotation direction of two dots, in a volatile context. They also took part in magnetic resonance spectroscopy (MRS) measurements to quantify Glx (glutamate and glutamine), GABA + and glutathione in a low-level perceptual region (occipital cortex) and in a higher-level region involved in prediction learning (inferior frontal gyrus). RESULTS: Neurotypical and autistic adults had their percepts biased by their expectations, and this bias was smaller for individuals with a more atypical sensory sensitivity. Both groups were able to learn the association and to update their beliefs after a change in contingency. Interestingly, the percentage of correct predictions was correlated with the Glx/GABA + ratio in the occipital cortex (positive correlation) and in the right inferior frontal gyrus (negative correlation). In this region, MRS results also showed an increased concentration of Glx in the ASD group compared to the neurotypical group. LIMITATIONS: We used a quite restrictive approach to select the MR spectra showing a good fit, which led to the exclusion of some MRS datasets and therefore to the reduction of the sample size for certain metabolites/regions. CONCLUSIONS: Autistic adults appeared to have intact abilities to make predictions in this task, in contrast with the Bayesian hypotheses of ASD. Yet, higher ratios of Glx/GABA + in a frontal region were associated with decreased predictive abilities, and ASD individuals tended to have more Glx in this region. This neurobiological difference might contribute to suboptimal predictive mechanisms in ASD in certain contexts. En ligne : http://dx.doi.org/10.1186/s13229-021-00470-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=459 [article] Prediction learning in adults with autism and its molecular correlates [texte imprimé] / Laurie-Anne SAPEY-TRIOMPHE, Auteur ; Joke TEMMERMAN, Auteur ; Nicolaas A.J. PUTS, Auteur ; Johan WAGEMANS, Auteur . - 64 p. Langues : Anglais (eng) in Molecular Autism > 12 (2021) . - 64 p. Mots-clés : Asd  Gaba  Glutamate  Glutathione  Magnetic resonance spectroscopy  Prediction  Prior  Probabilistic learning  Uncertainty  Volatility Index. décimale : PER Périodiques Résumé : BACKGROUND: According to Bayesian hypotheses, individuals with Autism Spectrum Disorder (ASD) have difficulties making accurate predictions about their environment. In particular, the mechanisms by which they assign precision to predictions or sensory inputs would be suboptimal in ASD. These mechanisms are thought to be mostly mediated by glutamate and GABA. Here, we aimed to shed light on prediction learning in ASD and on its neurobiological correlates. METHODS: Twenty-six neurotypical and 26 autistic adults participated in an associative learning task where they had to learn a probabilistic association between a tone and the rotation direction of two dots, in a volatile context. They also took part in magnetic resonance spectroscopy (MRS) measurements to quantify Glx (glutamate and glutamine), GABA + and glutathione in a low-level perceptual region (occipital cortex) and in a higher-level region involved in prediction learning (inferior frontal gyrus). RESULTS: Neurotypical and autistic adults had their percepts biased by their expectations, and this bias was smaller for individuals with a more atypical sensory sensitivity. Both groups were able to learn the association and to update their beliefs after a change in contingency. Interestingly, the percentage of correct predictions was correlated with the Glx/GABA + ratio in the occipital cortex (positive correlation) and in the right inferior frontal gyrus (negative correlation). In this region, MRS results also showed an increased concentration of Glx in the ASD group compared to the neurotypical group. LIMITATIONS: We used a quite restrictive approach to select the MR spectra showing a good fit, which led to the exclusion of some MRS datasets and therefore to the reduction of the sample size for certain metabolites/regions. CONCLUSIONS: Autistic adults appeared to have intact abilities to make predictions in this task, in contrast with the Bayesian hypotheses of ASD. Yet, higher ratios of Glx/GABA + in a frontal region were associated with decreased predictive abilities, and ASD individuals tended to have more Glx in this region. This neurobiological difference might contribute to suboptimal predictive mechanisms in ASD in certain contexts. En ligne : http://dx.doi.org/10.1186/s13229-021-00470-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=459

Metabolic Imbalance Associated with Methylation Dysregulation and Oxidative Damage in Children with Autism / Stepan MELNYK in Journal of Autism and Developmental Disorders, 42-3 (March 2012)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 42-3 (March 2012) . - p.367-377 Titre : Metabolic Imbalance Associated with Methylation Dysregulation and Oxidative Damage in Children with Autism Type de document : texte imprimé Auteurs : Stepan MELNYK, Auteur ; George J. FUCHS, Auteur ; Eldon SCHULZ, Auteur ; Maya LOPEZ, Auteur ; Stephen G. KAHLER, Auteur ; Jill J. FUSSELL, Auteur ; Jayne BELLANDO, Auteur ; Oleksandra PAVLIV, Auteur ; Shannon ROSE, Auteur ; Lisa SEIDEL, Auteur ; David W. GAYLOR, Auteur ; S. Jill JAMES, Auteur Année de publication : 2012 Article en page(s) : p.367-377 Langues : Anglais (eng) Mots-clés : Autism  Oxidative stress  Metabolic  Epigenetics  Glutathione  DNA methylation Index. décimale : PER Périodiques Résumé : Oxidative stress and abnormal DNA methylation have been implicated in the pathophysiology of autism. We investigated the dynamics of an integrated metabolic pathway essential for cellular antioxidant and methylation capacity in 68 children with autism, 54 age-matched control children and 40 unaffected siblings. The metabolic profile of unaffected siblings differed significantly from case siblings but not from controls. Oxidative protein/DNA damage and DNA hypomethylation (epigenetic alteration) were found in autistic children but not paired siblings or controls. These data indicate that the deficit in antioxidant and methylation capacity is specific for autism and may promote cellular damage and altered epigenetic gene expression. Further, these results suggest a plausible mechanism by which pro-oxidant environmental stressors may modulate genetic predisposition to autism. En ligne : http://dx.doi.org/10.1007/s10803-011-1260-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=152 [article] Metabolic Imbalance Associated with Methylation Dysregulation and Oxidative Damage in Children with Autism [texte imprimé] / Stepan MELNYK, Auteur ; George J. FUCHS, Auteur ; Eldon SCHULZ, Auteur ; Maya LOPEZ, Auteur ; Stephen G. KAHLER, Auteur ; Jill J. FUSSELL, Auteur ; Jayne BELLANDO, Auteur ; Oleksandra PAVLIV, Auteur ; Shannon ROSE, Auteur ; Lisa SEIDEL, Auteur ; David W. GAYLOR, Auteur ; S. Jill JAMES, Auteur . - 2012 . - p.367-377. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 42-3 (March 2012) . - p.367-377 Mots-clés : Autism  Oxidative stress  Metabolic  Epigenetics  Glutathione  DNA methylation Index. décimale : PER Périodiques Résumé : Oxidative stress and abnormal DNA methylation have been implicated in the pathophysiology of autism. We investigated the dynamics of an integrated metabolic pathway essential for cellular antioxidant and methylation capacity in 68 children with autism, 54 age-matched control children and 40 unaffected siblings. The metabolic profile of unaffected siblings differed significantly from case siblings but not from controls. Oxidative protein/DNA damage and DNA hypomethylation (epigenetic alteration) were found in autistic children but not paired siblings or controls. These data indicate that the deficit in antioxidant and methylation capacity is specific for autism and may promote cellular damage and altered epigenetic gene expression. Further, these results suggest a plausible mechanism by which pro-oxidant environmental stressors may modulate genetic predisposition to autism. En ligne : http://dx.doi.org/10.1007/s10803-011-1260-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=152