Cited by 29Attention Deficit Hyperactivity DisorderAdvanced MRI Techniques and ApplicationsGenetics and Neurodevelopmental Disorders

Emerging findings of glutamate–glutamine imbalance in the medial prefrontal cortex in attention deficit/hyperactivity disorder: Systematic review and meta-analysis of spectroscopy studies

Vidor, Marcos Vinícius, Panzenhagen, Alana Castro, Martins, Alexandre Ribeiro, Cupertino, Renata Basso, Bandeira, Cibele Edom, Picon, Felipe Almeida, da Silva, Bruna Santos, Vitola, Eduardo Schneider +4 more·2022·European Archives of Psychiatry and Clinical Neuroscience

Abstract

One of the main challenges in investigating the neurobiology of ADHD is our limited capacity to study its neurochemistry in vivo. Magnetic resonance spectroscopy (MRS) estimates metabolite concentrations within the brain, but approaches and findings have been heterogeneous. To assess differences in brain metabolites between patients with ADHD and healthy controls, we searched 12 databases screening for MRS studies. Studies were divided into 'children and adolescents' and 'adults' and meta-analyses were performed for each brain region with more than five studies. The quality of studies was assessed by the Newcastle-Ottawa Scale. Thirty-three studies met our eligibility criteria, including 874 patients with ADHD. Primary analyses revealed that the right medial frontal area of children with ADHD presented higher concentrations of a composite of glutamate and glutamine (p = 0.02, SMD = 0.53). Glutamate might be implicated in pruning and neurodegenerative processes as an excitotoxin, while glutamine excess might signal a glutamate depletion that could hinder neurotrophic activity. Both neuro metabolites could be implicated in the differential cortical thinning observed in patients with ADHD across all ages. Notably, more homogeneous designs and reporting guidelines are the key factors to determine how suitable MRS is for research and, perhaps, for clinical psychiatry. Results of this meta-analysis provided an overall map of the brain regions evaluated so far, addressed the role of glutamatergic metabolites in the pathophysiology of ADHD, and pointed to new perspectives for consistent use of the tool in the field.

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Crossref · 10.1007/s00406-022-01397-6

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Authors
Vidor, M. V., Panzenhagen, A. C., Martins, A. R., Cupertino, R. B., Bandeira, C. E., Picon, F. A., da Silva, B. S., Vitola, E. S., Rohde, L. A., Rovaris, D. L., Bau, C. H. D., & Grevet, E. H.
Affiliations
  • Universidade Federal do Rio Grande do Sul (BR)
  • University of Vermont (US)
  • Hospital de Clínicas de Porto Alegre (BR)
  • Universidade de São Paulo (BR)
Venue
European Archives of Psychiatry and Clinical Neuroscience
Published
2022-03-24
Volume
272
Issue
8
Pages
1395-1411
ISSN
  • 0003-9373 (ISSN-L)
  • 0940-1334
  • 1433-8491
OpenAlex
W4220745962
Cited by
29
References
103
Citations by year
2026: 9 · 2025: 8 · 2024: 6 · 2023: 3 · 2022: 3
FWCI
0.86
Type
journal article
Language
en
Open access
closed
Locations
  • European Archives of Psychiatry and Clinical Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
attention deficit hyperactivity disorder, medial prefrontal cortex, brain metabolites, magnetic resonance spectroscopy, glutamate, glutamine, cortical thinning, brain development, children and adolescents, adults
MeSH terms
Adolescent, Adult, Attention Deficit Disorder with Hyperactivity, Child, Glutamine, Humans, Magnetic Resonance Spectroscopy, Prefrontal Cortex, Glutamic Acid

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