Increased levels of plasma glial-derived neurotrophic factor in children with attention deficit hyperactivity disorder

Se Hoon Shim, Young Hwangbo, Hee Jung Yoon, Young Joon Kwon, Hwa Young Lee, Jung A. Hwang, Yong Ku Kim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Background: Recent evidence suggests that neurotrophic growth factor systems, including brain-derived neurotrophic factor, might be involved in the pathophysiology of attention deficit hyperactivity disorder (ADHD). Glial cell line-derived neurotrophic factor (GDNF) is from the transforming growth factor-β family and is abundantly expressed in the central nervous system, where it plays a role in the development and function of hippocampal cells. To date, no association studies have been done between ADHD and GDNF. Thus, here we investigate the hypothesis that there are differences in plasma GDNF levels between children with ADHD and healthy controls. Methods: Plasma GDNF levels were measured in 86 drug-naïve children with ADHD and 128 healthy children. The severity of ADHD symptoms was determined by scores on the Korean ADHD Rating Scale (K-ARS) in patients and healthy controls. Results: The median plasma GDNF levels in ADHD patients was 74.0 (IQR: 23.4-280.1) pg/ml versus 24.6 (IQR: 14.5-87.3) pg/ml in healthy controls; thus the median plasma GDNF levels in ADHD patients were significantly higher than in healthy controls (Mann-Whitney U-test, P < 0.01). Plasma GDNF levels were correlated positively with K-ARS subscale scores (inattention, hyperactivity-impulsivity and total), determined by Spearman's correlation test in ADHD patients and healthy controls (r = 0.371, P < 0.01; r = 0.331, P < 0.01; and r = 0.379, P < 0.01, respectively). Conclusions: These findings suggest increased plasma GDNF levels in untreated ADHD patients. In addition, plasma GDNF levels had a significant positive correlation with inattention, hyperactivity-impulsivity and K-ARS total scores in ADHD patients and healthy controls. Further studies are required to determine the source and role of circulating GDNF in ADHD.

Original languageEnglish
Pages (from-to)546-551
Number of pages6
JournalNordic Journal of Psychiatry
Volume69
Issue number7
DOIs
Publication statusPublished - 2015 Oct 3

Fingerprint

Glial Cell Line-Derived Neurotrophic Factor
Nerve Growth Factors
Attention Deficit Disorder with Hyperactivity
Neuroglia
Impulsive Behavior
Brain-Derived Neurotrophic Factor
Transforming Growth Factors
Nonparametric Statistics
Intercellular Signaling Peptides and Proteins
Central Nervous System

Keywords

  • ADHD
  • GDNF
  • Neurodevelopment
  • Neurotrophin

ASJC Scopus subject areas

  • Psychiatry and Mental health

Cite this

Increased levels of plasma glial-derived neurotrophic factor in children with attention deficit hyperactivity disorder. / Shim, Se Hoon; Hwangbo, Young; Yoon, Hee Jung; Kwon, Young Joon; Lee, Hwa Young; Hwang, Jung A.; Kim, Yong Ku.

In: Nordic Journal of Psychiatry, Vol. 69, No. 7, 03.10.2015, p. 546-551.

Research output: Contribution to journalArticle

Shim, Se Hoon ; Hwangbo, Young ; Yoon, Hee Jung ; Kwon, Young Joon ; Lee, Hwa Young ; Hwang, Jung A. ; Kim, Yong Ku. / Increased levels of plasma glial-derived neurotrophic factor in children with attention deficit hyperactivity disorder. In: Nordic Journal of Psychiatry. 2015 ; Vol. 69, No. 7. pp. 546-551.
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AU - Hwang, Jung A.

AU - Kim, Yong Ku

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AB - Background: Recent evidence suggests that neurotrophic growth factor systems, including brain-derived neurotrophic factor, might be involved in the pathophysiology of attention deficit hyperactivity disorder (ADHD). Glial cell line-derived neurotrophic factor (GDNF) is from the transforming growth factor-β family and is abundantly expressed in the central nervous system, where it plays a role in the development and function of hippocampal cells. To date, no association studies have been done between ADHD and GDNF. Thus, here we investigate the hypothesis that there are differences in plasma GDNF levels between children with ADHD and healthy controls. Methods: Plasma GDNF levels were measured in 86 drug-naïve children with ADHD and 128 healthy children. The severity of ADHD symptoms was determined by scores on the Korean ADHD Rating Scale (K-ARS) in patients and healthy controls. Results: The median plasma GDNF levels in ADHD patients was 74.0 (IQR: 23.4-280.1) pg/ml versus 24.6 (IQR: 14.5-87.3) pg/ml in healthy controls; thus the median plasma GDNF levels in ADHD patients were significantly higher than in healthy controls (Mann-Whitney U-test, P < 0.01). Plasma GDNF levels were correlated positively with K-ARS subscale scores (inattention, hyperactivity-impulsivity and total), determined by Spearman's correlation test in ADHD patients and healthy controls (r = 0.371, P < 0.01; r = 0.331, P < 0.01; and r = 0.379, P < 0.01, respectively). Conclusions: These findings suggest increased plasma GDNF levels in untreated ADHD patients. In addition, plasma GDNF levels had a significant positive correlation with inattention, hyperactivity-impulsivity and K-ARS total scores in ADHD patients and healthy controls. Further studies are required to determine the source and role of circulating GDNF in ADHD.

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