Cited by 19Attention Deficit Hyperactivity DisorderCircadian rhythm and melatoninChild and Adolescent Psychosocial and Emotional Development

Methylphenidate Ameliorates Depressive Comorbidity in ADHD Children without any Modification on Differences in Serum Melatonin Concentration between ADHD Subtypes

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Cubero-Millán, Isabel, Molina-Carballo, Antonio, Machado-Casas, Irene, Fernández-López, Luisa, Martínez-Serrano, Sylvia, Tortosa-Pinto, Pilar, Ruiz-López, Aida, Luna-del-Castillo, Juan-de-Dios +2 more·2014·International Journal of Molecular Sciences

Abstract

The vast majority of Attention-deficit/hyperactivity disorder (ADHD) patients have other associated pathologies, with depressive symptoms as one of the most prevalent. Among the mediators that may participate in ADHD, melatonin is thought to regulate circadian rhythms, neurological function and stress response. To determine (1) the serum baseline daily variations and nocturnal excretion of melatonin in ADHD subtypes and (2) the effect of chronic administration of methylphenidate, as well as the effects on symptomatology, 136 children with ADHD (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision: DSM-IV-TR criteria) were divided into subgroups using the “Children’s Depression Inventory” (CDI). Blood samples were drawn at 20:00 and 09:00 h, and urine was collected between 21:00 and 09:00 h, at inclusion and after 4.61 ± 2.29 months of treatment. Melatonin and its urine metabolite were measured by radioimmunoassay RIA. Factorial analysis was performed using STATA 12.0. Melatonin was higher predominantly in hyperactive-impulsive/conduct disordered children (PHI/CD) of the ADHD subtype, without the influence of comorbid depressive symptoms. Methylphenidate ameliorated this comorbidity without induction of any changes in the serum melatonin profile, but treatment with it was associated with a decrease in 6-s-melatonin excretion in both ADHD subtypes. Conclusions: In untreated children, partial homeostatic restoration of disrupted neuroendocrine equilibrium most likely led to an increased serum melatonin in PHI/CD children. A differential cerebral melatonin metabolization after methylphenidate may underlie some of the clinical benefit.

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Authors
Cubero-Millán, I., Molina-Carballo, A., Machado-Casas, I., Fernández-López, L., Martínez-Serrano, S., Tortosa-Pinto, P., Ruiz-López, A., Luna-del-Castillo, J.-D.-D., Uberos, J., & Muñoz-Hoyos, A.
Affiliations
  • Neuropediatric, Neuropsicology and Early intervention Unit Pediatric Service, Clinico San Cecilio Hospital, 18012 Granada, Spain
  • Biostatistical Department, School of Medicine, Granada University, 18140 Granada, Spain
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2014-09-25
Volume
15
Issue
9
Pages
17115-17129
ISSN
1422-0067 (ISSN-L)
OpenAlex
W2064903653
Cited by
19
References
65
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 3 · 2017: 2 · 2016: 2
FWCI
1.02
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Institutional Repository of the University of Granada (University of Granada) (submittedVersion, cc-by-nc-nd)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Health Research Fund (FIS; Spanish Ministry of Science and Innovation) (FIS-PI07-0603)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Clinical Psychology › Child and Adolescent Psychosocial and Emotional Development
Keywords
methylphenidate, attention deficit hyperactivity disorder, depressive symptoms, comorbidities, melatonin, serum melatonin, ADHD subtypes, children, circadian rhythm, neuroendocrine regulation
MeSH terms
Adolescent, Central Nervous System Stimulants, Attention Deficit Disorder with Hyperactivity, Child, Child, Preschool, Circadian Rhythm, Depression, Female, Homeostasis, Humans, Impulsive Behavior, Male, Melatonin, Methylphenidate, Personality Inventory, Conduct Disorder, Sleep Disorders, Intrinsic

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