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 ORIGINAL ARTICLE
Year : 2020  |  Volume : 15  |  Issue : 4  |  Page : 402-408

Serum levels of interleukin-6 and tumor necrosis factor alpha in children with attention-deficit hyperactivity disorder


1 Pediatric Department, Benha University, Benha, Egypt
2 Department of Pediatric/Pediatric Hepatology, Faculty of Medicine, Cairo University, Cairo, Egypt; Department of Pediatric/Pediatric Hepatology and Gastroenterology, Alhada and Taif Armed Forces Hospitals, Taif, Saudi Arabia
3 Pediatric Department, Ain Shams University, Cairo, Egypt
4 Department of Pediatric/Pediatric Neurology, Faculty of Medicine, Menoufia University, Shebeen Elkom, Egypt; Department of Pediatric/Pediatric Neurology, Alhada and Taif Armed Forces, Hospitals, Taif, Saudi Arabia
5 Pediatric Department, Faculty of Medicine, Menoufia University, Shebeen Elkom, Egypt
6 Pediatric Department, Al-Azhar University, Cairo, Egypt
7 Clinical Pathology Department, Benha University, Benha, Egypt

Correspondence Address:
Prof. Hatem H El-shorbagy
Department of Pediatric/Pediatric Neurology, Faculty of Medicine, Menoufia University, Shebeen Elkom.
Saudi Arabia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/JPN.JPN_1_20

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Background: Attention-deficit hyperactivity disorder (ADHD) is a common disorder in children, but its etiology and pathogenesis are still unclear. Aims: The aims of this study were to measure the level of serum interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α) as markers of immune system involvement in children with ADHD, and to study their correlation with symptoms severity of ADHD. Materials and Methods: The study was conducted on 80 children diagnosed as ADHD based on the criteria adapted from the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition. Eighty healthy children of matched age and sex served as a control group. All children enrolled in the study were subjected to history taking, clinical examination, and psychometric tests. Assay for serum IL-6 and TNF-α for all patients and controls was performed using enzyme-linked immunosorbent assay. Results: The mean serum level of IL-6 was 26.11 ± 11.14 and 6.23 ± 2.52 in children with ADHD and controls, respectively. Children with ADHD showed significantly higher serum IL-6 levels than the control group (P = 0.001). Serum IL-6 showed no significant correlation with the intelligence quotient (IQ) or the Abbreviated Conners’ Rating Scale scores for parents. However, TNF-α showed no significant differences between the two groups and no significant correlation with the IQ or the Abbreviated Conners’ Rating Scale scores for parents. Conclusion: Serum IL-6 levels were significantly higher in children with ADHD compared to controls; however, the IL-6 levels did not correlate with ADHD symptoms severity. Increased IL-6 levels may contribute to the etiology of ADHD.






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