European Child & Adolescent Psychiatry

, Volume 26, Issue 12, pp 1433–1441 | Cite as

Changes in serum levels of kynurenine metabolites in paediatric patients affected by ADHD

  • Melania Evangelisti
  • Pietro De Rossi
  • Jole Rabasco
  • Renato Donfrancesco
  • Luana Lionetto
  • Matilde Capi
  • Gabriele Sani
  • Maurizio Simmaco
  • Ferdinando Nicoletti
  • Maria Pia Villa
Original Contribution

Abstract

This study aims at determining serum levels of tryptophan and other metabolites of the kynurenine pathway in children with attention deficit hyperactivity disorder (ADHD) compared to healthy controls. Such metabolites interact with glutamate receptors in the central nervous system, potentially modulating mechanisms that are pivotal in ADHD and thus potentially representing peripheral biomarkers of the disorder. We measured serum levels of tryptophan and some metabolites of the kynurenine pathway in 102 children with ADHD and 62 healthy controls by liquid chromatography–tandem mass spectrometry (LC–MS/MS). As compared to healthy controls, children with ADHD showed a reduction in serum levels of anthranilic acid (−60%), kynurenic acid (−11.2%), and xanthurenic acid (−12.5%). In contrast, serum levels of tryptophan (+11.0%) and kynurenine (+48.6%) were significantly enhanced, and levels of quinolinic acid were unchanged in children with ADHD. In a logistic regression model, the presence of ADHD was predicted by low anthranilic acid and high tryptophan levels. These findings support the involvement of the kynurenine pathway in the pathophysiology of ADHD and suggest that anthranilic acid and tryptophan levels should be investigated as potential peripheral biomarker for ADHD.

Keywords

ADHD Biomarker Kynurenines Children Neurobiology 

Notes

Compliance with ethical standards

Conflict of interest

MelaniaEvangelisti—Reports no disclosures. JoleRabasco—Reports no disclosures. Renato Donfrancesco—Reports no disclosures. Pietro De Rossi—Reports no disclosures. LuanaLionetto—Reports no disclosures. MatildeCapi—Reports no disclosures. Gabriele Sani—Reports no disclosures. Maurizio Simmaco—Reports no disclosures. Ferdinando Nicoletti—Reports no disclosures. Maria Pia Villa—Reports no disclosures.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Melania Evangelisti
    • 1
  • Pietro De Rossi
    • 1
    • 3
    • 7
  • Jole Rabasco
    • 1
  • Renato Donfrancesco
    • 2
  • Luana Lionetto
    • 4
  • Matilde Capi
    • 4
  • Gabriele Sani
    • 1
    • 3
    • 7
  • Maurizio Simmaco
    • 1
  • Ferdinando Nicoletti
    • 5
    • 6
  • Maria Pia Villa
    • 1
  1. 1.NESMOS Department, School of Medicine and Psychology, Sant’Andrea HospitalSapienza UniversityRomeItaly
  2. 2.S. Pertini HospitalASL RM/BRomeItaly
  3. 3.I.R.C.C.S. Fondazione Santa LuciaRomeItaly
  4. 4.Experimental Immunology Laboratory, Biochemistry LaboratoryIDI-IRCCS FLMMRomeItaly
  5. 5.I.R.C.C.S. NeuromedPozzilliItaly
  6. 6.Department of Physiology and PharmacologySapienza UniversityRomeItaly
  7. 7.Department of Neurology and PsychiatrySapienza University of RomeRomeItaly

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