Cited by 151Attention Deficit Hyperactivity DisorderTryptophan and brain disordersAutism Spectrum Disorder Research

Attention-deficit hyperactivity disorder (ADHD) and glial integrity: S100B, cytokines and kynurenine metabolism-effects of medication

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Oades, Robert D, Dauvermann, Maria R, Schimmelmann, Benno G, Schwarz, Markus J, Myint, Aye-Mu·2010·Behavioral and Brain Functions

Abstract

BACKGROUND: Children with attention-deficit/hyperactivity disorder (ADHD) show a marked temporal variability in their display of symptoms and neuropsychological performance. This could be explained in terms of an impaired glial supply of energy to support neuronal activity. METHOD: We pursued one test of the idea with measures of a neurotrophin reflecting glial integrity (S100B) and the influences of 8 cytokines on the metabolism of amino-acids, and of tryptophan/kynurenine to neuroprotective or potentially toxic products that could modulate glial function. Serum samples from 21 medication-naïve children with ADHD, 21 typically-developing controls, 14 medicated children with ADHD and 7 healthy siblings were analysed in this preliminary exploration of group differences and associations. RESULTS: There were no marked group differences in levels of S100B, no major imbalance in the ratios of pro- to anti-inflammatory interleukins nor in the metabolism of kynurenine to toxic metabolites in ADHD. However, four trends are described that may be worthy of closer examination in a more extensive study. First, S100B levels tended to be lower in ADHD children that did not show oppositional/conduct problems. Second, in medicated children raised interleukin levels showed a trend to normalisation. Third, while across all children the sensitivity to allergy reflected increased levels of IL-16 and IL-10, the latter showed a significant inverse relationship to measures of S100B in the ADHD group. Fourthly, against expectations healthy controls tended to show higher levels of toxic 3-hydroxykynurenine (3 HK) than those with ADHD. CONCLUSIONS: Thus, there were no clear signs (S100B) that the glial functions were compromised in ADHD. However, other markers of glial function require examination. Nonetheless there is preliminary evidence that a minor imbalance of the immunological system was improved on medication. Finally, if lower levels of the potentially toxic 3 HK in ADHD children were confirmed this could reflect a reduction of normal pruning processes in the brain that would be consistent with delayed maturation (supported here by associations with amino-acid metabolism) and a reduced metabolic source of energy.

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  • Existing studies have shown elevated levels of proinflammatory cytokines and impaired antioxidant function in individuals with ADHD, yet their specificity and sensitivity remain insufficient.

    “Existing studies have shown elevated levels of proinflammatory cytokines and impaired antioxidant function in individuals with ADHD [209], yet their specificity and sensitivity remain insufficient.”

    From ADHD in Adulthood: Clinical Presentation, Comorbidities, and Treatment Perspectives (2025) · cites this paper as [209]

    The Discussion (page unavailable) reports marginal increases in six of eight measured interleukins in children with ADHD, but says the effects may be insignificant; it also says pro- to anti-inflammatory cytokine ratios did not distinguish ADHD cases from controls. The paper does not report impaired antioxidant function or assess the diagnostic sensitivity and specificity of these measures (searched: antioxidant, diagnostic sensitivity and specificity). (LLM, conf=0.88)

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Authors
Oades, R. D., Dauvermann, M. R., Schimmelmann, B. G., Schwarz, M. J., & Myint, A.-M.
Affiliations
  • University of Duisburg-Essen (DE)
  • University of Bern (CH)
  • Ludwig-Maximilians-Universität München (DE)
Corresponding author
Oades, Robert D
Venue
Behavioral and Brain Functions
Published
2010
Volume
6
Issue
1
Pages
29
ISSN
1744-9081 (ISSN-L)
OpenAlex
W2160451654
Cited by
151
References
99
Citations by year
2026: 5 · 2025: 13 · 2024: 11 · 2023: 10 · 2022: 12 · 2021: 20 · 2020: 16 · 2019: 7 · 2018: 8 · 2017: 12 · 2016: 6 · 2015: 10 · 2014: 6 · 2013: 7 · 2012: 5
FWCI
3.27
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Behavioral and Brain Functions (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • BORIS (University Library Bern) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • DuEPublico (University of Duisburg-Essen) (submittedVersion, cc-by)
  • Open access LMU (Ludwid Maxmilian's Universitat Munchen) (submittedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion, cc-by)
  • Open Access CRIS of the University of Bern
Funders
UCB Pharma
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
Keywords
attention deficit hyperactivity disorder, glial function, S100B, cytokines, kynurenine metabolism, tryptophan metabolism, 3-hydroxykynurenine, interleukin-16, IL-10, ADHD medication, neuroinflammation, amino acid metabolism, children
MeSH terms
Adolescent, Amino Acids, Central Nervous System Stimulants, Attention Deficit Disorder with Hyperactivity, Brain, Child, Energy Metabolism, Female, Humans, Kynurenine, Male, Nerve Growth Factors, S100 Proteins, Neuroglia, Pilot Projects, Tryptophan, Cytokines, S100 Calcium Binding Protein beta Subunit

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