[article] 
inAutism Research > 6-2 (April 2013) . - p.119-133

Titre :	Proton Magnetic Resonance Spectroscopy as a Probe into the Pathophysiology of Autism Spectrum Disorders (ASD): A Review
Type de document :	Texte imprimé et/ou numérique
Auteurs :	Joshua M. BARUTH, Auteur ; Christopher A. WALL, Auteur ; Marc C. PATTERSON, Auteur ; John D. PORT, Auteur
Année de publication :	2013
Article en page(s) :	p.119-133
Langues :	Anglais (eng)
Mots-clés :	Autism Spectrum Disorders  proton magnetic resonance spectroscopy  N-acetylaspartate  glutamate  myo-inositol
Index. décimale :	PER Périodiques
Résumé :	Proton magnetic resonance spectroscopy (1H-MRS) is a safe, noninvasive way of quantifying in vivo biochemical and metabolite concentration levels in individuals with Autism Spectrum Disorders (ASD). Findings to date suggest ASD is associated with widespread reduction in N-acetylaspartate (NAA), creatine plus phosphocreatine (Cr), choline-containing compounds (Cho), myo-inositol (mI), and glutamate plus glutamine plus gamma-Aminobutyric Acid (Glx); however, variable findings, and even substantial increases, are not uncommon depending on the study and/or region-of-interest. Widespread reduction of NAA, Cr, Cho, mI, and Glx in ASD likely reflects impaired neuronal function and/or metabolism related to abnormal neurodevelopmental processes. Future studies should attempt to relate 1H-MRS findings to histological findings and control for variability in subject age and functioning level; this would assist in evaluating the relationship between 1H-MRS metabolic levels and neuronal and glial cell densities, as well as neurodevelopmental process associated with ASD. Furthermore, more longitudinal 1H-MRS studies are needed in both control and ASD subjects to attempt to standardize metabolite levels across different developmental periods in well-defined endophenotypes. This will provide for a standard rubric for which metabolic aberrations (as well as treatment responses) can be measured. With higher magnetic field strengths and spectral-editing techniques capable of quantifying less-concentrated metabolites, 1H-MRS will continue to be an important tool in ASD research.
En ligne :	http://dx.doi.org/10.1002/aur.1273
Permalink :	https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=199

[article] Proton Magnetic Resonance Spectroscopy as a Probe into the Pathophysiology of Autism Spectrum Disorders (ASD): A Review [Texte imprimé et/ou numérique] / Joshua M. BARUTH, Auteur ; Christopher A. WALL, Auteur ; Marc C. PATTERSON, Auteur ; John D. PORT, Auteur . - 2013 . - p.119-133.
Langues : Anglais (eng)
in Autism Research > 6-2 (April 2013) . - p.119-133

Mots-clés :	Autism Spectrum Disorders  proton magnetic resonance spectroscopy  N-acetylaspartate  glutamate  myo-inositol
Index. décimale :	PER Périodiques
Résumé :	Proton magnetic resonance spectroscopy (1H-MRS) is a safe, noninvasive way of quantifying in vivo biochemical and metabolite concentration levels in individuals with Autism Spectrum Disorders (ASD). Findings to date suggest ASD is associated with widespread reduction in N-acetylaspartate (NAA), creatine plus phosphocreatine (Cr), choline-containing compounds (Cho), myo-inositol (mI), and glutamate plus glutamine plus gamma-Aminobutyric Acid (Glx); however, variable findings, and even substantial increases, are not uncommon depending on the study and/or region-of-interest. Widespread reduction of NAA, Cr, Cho, mI, and Glx in ASD likely reflects impaired neuronal function and/or metabolism related to abnormal neurodevelopmental processes. Future studies should attempt to relate 1H-MRS findings to histological findings and control for variability in subject age and functioning level; this would assist in evaluating the relationship between 1H-MRS metabolic levels and neuronal and glial cell densities, as well as neurodevelopmental process associated with ASD. Furthermore, more longitudinal 1H-MRS studies are needed in both control and ASD subjects to attempt to standardize metabolite levels across different developmental periods in well-defined endophenotypes. This will provide for a standard rubric for which metabolic aberrations (as well as treatment responses) can be measured. With higher magnetic field strengths and spectral-editing techniques capable of quantifying less-concentrated metabolites, 1H-MRS will continue to be an important tool in ASD research.
En ligne :	http://dx.doi.org/10.1002/aur.1273
Permalink :	https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=199