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Decreased serum orexin A levels in drug-naive children with attention deficit and hyperactivity disorder

  • Saliha BaykalEmail author
  • Yakup Albayrak
  • Ferit Durankuş
  • Savaş Güzel
  • Özlem Abbak
  • Nihan Potas
  • Murat Beyazyüz
  • Koray Karabekiroğlu
  • Mustafa Metin Donma
Original Article
  • 49 Downloads

Abstract

Attention deficit/hyperactivity disorder (ADHD) is one of the most common psychiatric disorders of childhood and characterized by inattention, hyperactivity, and impulsivity. ADHD is a neurodevelopmental disorder, and its etiology has not yet been determined precisely. Orexin A is thought to play an important role in different forms of learning, memory, and attention. Despite its importance in attention and learning, no study has investigated serum orexin levels in patients with ADHD. In the present study, we aimed to compare serum orexigenic neuropeptides such as orexin A and orexin B, neuropeptide Y, and ghrelin between drug naive children with ADHD and healthy children. Fifty-six drug-naive children with ADHD and 40 healthy controls were enrolled in the study. After comparison of serum orexin A and orexin B, neuropeptide Y, and ghrelin, we found that serum orexin A levels were significantly lower in the ADHD group (p = 0.001). Furthermore, serum orexin A levels were compared between ADHD subgroups. Orexin A levels were significantly lower in the inattentive subtype compared with the hyperactive subtype and combined subtype (p = 0.009). Our results indicate that orexin A might be a neurobiological etiological factor in ADHD, particularly associated with attention symptoms. The present study is the first to demonstrate decreased serum orexin A levels in drug-naive children with ADHD. Further studies are needed to confirm our results and to show the effects of treatments involving orexin A in patients with ADHD.

Keywords

Orexin Attention Hyperactivity Etiology Neurobiology 

Notes

Funding

The present study was supported by Tekirdağ Namık Kemal University Scientific Research Community (Grant Number: NKUBAP.02.GA.17.09)

Compliance with ethical standards

The present study was approved by the Namık Kemal University Non-Invasive Clinic Research Ethical Committee.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Fondazione Società Italiana di Neurologia 2019

Authors and Affiliations

  • Saliha Baykal
    • 1
    Email author return OK on get
  • Yakup Albayrak
    • 2
  • Ferit Durankuş
    • 3
  • Savaş Güzel
    • 4
  • Özlem Abbak
    • 2
  • Nihan Potas
    • 5
  • Murat Beyazyüz
    • 2
  • Koray Karabekiroğlu
    • 6
  • Mustafa Metin Donma
    • 7
  1. 1.Faculty of Medicine, Department of Child and Adolescent PsychiatryTekirdağ Namık Kemal UniversityTekirdagTurkey
  2. 2.Faculty of Medicine, Department of PsychiatryTekirdağ Namık Kemal UniversityTekirdagTurkey
  3. 3.Faculty of Medicine, Department of PediatricsOkan UniversityIstanbulTurkey
  4. 4.Faculty of Medicine, Department of BiochemistryTekirdağ Namık Kemal UniversityTekirdagTurkey
  5. 5.Faculty of Economics and Administrative Science, Department of Healthcare ManagementGazi UniversityAnkaraTurkey
  6. 6.Faculty of Medicine, Department of Child and Adolescent PsychiatryOndokuz Mayıs UniversitySamsunTurkey
  7. 7.Faculty of Medicine, Department of PediatricsTekirdağ Namık Kemal UniversityTekirdagTurkey

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