The Effect Of Methylphenıdate Treatment On Neuroınflammatıon Levels In Chıldren Wıth Attentıon Defıcıt Hyperactıvıty Dısorder

The aim of this study was to investigate the effect of treatment of ADHD with methylphenidate on neuroinflammation by examining the levels of Interleukin-6 (IL-6), S100B, Claudin-5 in serum samples of patients who were diagnosed with attention deficit hyperactivity disorder (ADHD) and started or planned to start methylphenidate for treatment as per routine, at month 0 before the initiation of methylphenidate treatment and at month 3 after the initiation of treatment.

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Key information

Conditions

Attention Deficit Disorder With Hyperactivity (ADHD) Attention Deficit Disorder with Hyperactivity Attention Deficit and Disruptive Behavior Disorders Inflammation Mental Disorders Nervous System Diseases Neurodevelopmental Disorders Neuroinflammatory Diseases Pathologic Processes Pathological Conditions, Signs and Symptoms

Age range

6 year–11 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Bakırköy Prof. Dr. Mazhar Osman Mental Health and Neurological Diseases Training and Research Hospita

Istanbul, Bakırkoy, 34147, Turkey (Türkiye)

About this study

After informed consent, a structured clinical interview for DSM-5-TR will be conducted using the "Emotional Disorders and Schizophrenia Form for School-Age Children - Current and Lifetime Form DSM-5 - Turkish Adaptation (ÇDŞG-ŞY-DSM-5-T)". The "Sociodemographic and Clinical Data Form" created by the researchers will be completed to obtain sociodemographic and clinical data for the participants. The "Conners Parent Rating Scale-Revised Short Form" and "Conners Teacher Rating Scale-Revised Short Form" will be administered to the group diagnosed with ADHD to determine the severity of the disease, symptoms, and predominant subtypes. After the diagnosis is made and evaluated according to the exclusion criteria, peripheral venous blood will be collected in yellow-capped tubes between 9 and 12 a.m. after a 10-12 hour fast, prior to the routine planned methylphenidate treatment. After being left at room temperature for 10-20 minutes, the blood will be centrifuged at 3000 RPM for 20 minutes, and the serum portion will be collected into Eppendorf tubes and stored at -80 degrees until the samples are analyzed. Three months after starting treatment, blood will be collected and stored in the same manner. After all samples have been collected, the serum samples will be analyzed in a single batch for Interleukin-6 (IL-6), S100B, and Claudin-5 levels using human ELISA kit protocols at the Medical Biochemistry Laboratory of Bakırköy Dr. Sadi Konuk Training and Research Hospital by biochemistry specialist Dr. Hacer Eroğlu İçli. Three months after the start of treatment, the Conners Parent Rating Scale - Revised Short Form and the Conners Teacher Rating Scale - Revised Short Form will be administered again.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

According to DSM-5 TR, the participant must have a diagnosis of "Attention Deficit Hyperactivity Disorder" and have started/be planning to start routine methylphenidate treatment.
The participant must be between 6 and 11 years of age.
The participant must agree to participate in the study after being informed about it.

Exclusion criteria

The presence of a psychiatric disorder diagnosis other than Attention Deficit Hyperactivity Disorder
Having a diagnosis of Attention Deficit Hyperactivity Disorder but not planning to start methylphenidate
Being under 6 years of age or over 11 years of age
Having organic brain damage, mental retardation, autism spectrum disorder, neurological disease, or a physical illness that affects neurocognitive functions
History of alcohol and/or psychoactive substance use
Presence of ongoing active infection, allergic disease, and chronic illness
Previous use of psychiatric medication.
Presence of chronic illness
Regular use of medication

Treatment and study plan

Primary outcomes

Change in IL-6 Marker Level

Time frame: Immediately before starting the treatment and up to the 3rd month of treatment.

Interleukin-6 (IL-6) level was measured according to the human ELISA kit protocol. Serum samples from 42 patients were compared immediately before and after 3 months of treatment. IL-6 was measured according to the human ELISA kit protocol as follows (bioassay technology laboratory, Cat.No E0090Hu):

Standards added to wells. 40μl of serum sample was added to the sample wells, followed by 10μl of anti-IL-6 antibody. Incubated at 37°C for 60 minutes. plate was washed 5 times with wash buffer. 50μl of substrate solution A was added to the wells and then 50μl of substrate solution B was added to each well. The plate was incubated for 10 minutes at 37°C in the dark. 50μl of Stop Solution was added to the wells and the blue color immediately changed to yellow. The optical density (OD value) of each well was determined using a microplate reader set to 450 nm within 10 min after adding the stop solution.
Change in S100B Marker Level

Time frame: Immediately before starting the treatment and up to the 3rd month of treatment.

S100 Calcium Binding Protein B (S100B) level was measured according to the human ELISA kit protocol. Serum samples from 42 patients were compared immediately before and after 3 months of treatment. S100B was measured according to the human ELISA kit protocol as follows (bioassay technology laboratory, Cat.No E3887Hu):

Standards added to wells. 40μl of serum sample was added to the sample wells, followed by 10μl of anti-S100B antibody. Incubated at 37°C for 60 minutes. plate was washed 5 times with wash buffer. 50μl of substrate solution A was added to the wells and then 50μl of substrate solution B was added to each well. The plate was incubated for 10 minutes at 37°C in the dark. 50μl of Stop Solution was added to the wells and the blue color immediately changed to yellow. The optical density (OD value) of each well was determined using a microplate reader set to 450 nm within 10 min after adding the stop solution.
Change in the Level of Claudin-5 Marker

Time frame: Immediately before starting the treatment and up to the 3rd month of treatment.

Claudin 5 level was measured according to the human ELISA kit protocol. Serum samples from 42 patients were compared immediately before and after 3 months of treatment. Claudin 5 was measured according to the human ELISA kit protocol as follows (bioassay technology laboratory, Cat.No E2303Hu):

Standards added to wells. 40μl of serum sample was added to the sample wells, followed by 10μl of anti-Claudin 5 antibody. Incubated at 37°C for 60 minutes. plate was washed 5 times with wash buffer. 50μl of substrate solution A was added to the wells and then 50μl of substrate solution B was added to each well. The plate was incubated for 10 minutes at 37°C in the dark. 50μl of Stop Solution was added to the wells and the blue color immediately changed to yellow. The optical density (OD value) of each well was determined using a microplate reader set to 450 nm within 10 min after adding the stop solution.

Sponsors and collaborators

Lead sponsor

Enes Faruk ALTUNKILIÇ

Other

Registry information

Important dates

Study start: 2025
Primary completion: 2025
Study completion: 2025
First posted: Jun 27, 2025
Registry last updated: Feb 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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