IL-33, sST2, and CRP in Panic Disorder
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- This is an observational study: the protocol does not assign a study treatment.
- Who it may be relevant to
- Registry conditions: Panic Disorder. Basic parameters: 18 years — 65 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Turkey (Türkiye)
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
Investigation of IL-33, sST2, and C-Reactive Protein in Panic Disorder: A Cross-Sectional Case-Control Study
Overview
Panic disorder (PD) is characterized by recurrent and unexpected panic attacks and is associated with significant functional impairment. Increasing evidence suggests involvement of immune-inflammatory mechanisms in PD. Elevated levels of inflammatory markers such as C-reactive protein (CRP) have been reported in PD; however, interleukin-33 (IL-33) and soluble suppressor tumorogenicity-2 (sST2), components of the IL-33/sST2 signaling axis, have not previously been investigated in PD. This cross-sectional case-control study aims to compare peripheral serum IL-33, sST2, and CRP levels between drug-naïve subjects diagnosed with PD and healthy controls (HCs). The findings may contribute to understanding the inflammatory mechanisms underlying PD.
Detailed description
This is an observational, cross-sectional, case-control study conducted at the psychiatry outpatient clinic of Elazığ Mental Health and Diseases Hospital. It was planned to include 40 participants in the panic disorder (PD) and healthy controls (HCs) groups. All participants will complete a sociodemographic data form and the DSM-5 Panic Disorder Severity Scale (Adult Form). Venous blood samples (5 mL) will be collected between 08:30-10:00 a.m. after 12-hour fasting. Serum interleukin-33 (IL-33), soluble suppressor tumorogenicity-2 (sST2), and C-reactive protein (CRP) levels will be measured using commercially available ELISA kits. Statistical analyses will include independent samples t-test or Mann-Whitney U test, chi-square test, correlation, regression, and ROC analysis. A p value \< 0.05 will be considered statistically significant.
Primary outcome measures
- Interleukin-33 (IL-33) [Time frame: At hospital admission (baseline)]
- Soluble Suppressor Tumorogenicity-2 (sST2) [Time frame: At hospital admission (baseline)]
- C-Reactive Protein (CRP) [Time frame: At hospital admission (baseline)]
Secondary outcome measures (2)
- Aggregate Index of Systemic Inflammation (AISI) [Time frame: At hospital admission (baseline)]
- DSM-5 Panic Disorder Severity Scale-Adult Form (PDS) [Time frame: At hospital admission (baseline)]
Eligibility criteria
- For Panic Disorder (PD) Group:
\*Inclusion Criteria:
- Being between 18-65 years of age
- Having a diagnosis of panic disorder (PD) according to DSM-5-TR and having presented to the hospital with panic attack symptoms of the disorder
- Not having previously used any medication for psychiatric purposes (drug-naive)
- Not having any additional active psychiatric disorders besides PD at the current presentation
- Absence of hypertension, diabetes mellitus, renal failure, hepatic failure, neurological disease with cognitive impairment, acute infection, pregnancy, autoimmune disease, or cancer
- Not having taken any medication or supplements in the last month
- Completing sociodemographic and scale data fully
- Volunteering to participate in the study
For PD Group:
\*Exclusion Criteria:
- Being outside the 18-65 age range
- Not meeting the diagnostic criteria for PD according to DSM-5-TR or being in good health
- Having a history of psychiatric medication use
- Having an additional psychiatric disorder besides PD at the current application
- Presence of hypertension, diabetes mellitus, renal failure, hepatic failure, neurological disease with cognitive impairment, acute infection, pregnancy, autoimmune disease, cancer
- Patients with a body mass index (BMI) <18.5 kg/m² and >29.9 kg/m²
- Taking any medication or supplement in the last month
- Incomplete completion of sociodemographic and scale data
- Not volunteering to participate in the study
- For Healthy Control Group:
- Inclusion Criteria:
- Being between 18-65 years of age
- Not having any active psychiatric disorder
- Not having previously used any medication for psychiatric purposes (drug-naive)
- Not having hypertension, diabetes mellitus, kidney failure, liver failure, neurological disease with cognitive impairment, acute infection, pregnancy, autoimmune disease, or cancer
- Not having taken any medication or supplement in the last month
- Completing sociodemographic and scale data fully
- Volunteering to participate in the study
For Healthy Control Group:
\*Exclusion Criteria:
- Being outside the 18-65 age range
- Having any active psychiatric disorder
- Having a history of using psychiatric medication
- Having hypertension, diabetes mellitus, renal failure, hepatic failure, neurological disease with cognitive impairment, acute infection, pregnancy, autoimmune disease, or cancer
- Patients with a body mass index (BMI) < 18.5 kg/m² and > 29.9 kg/m²
- Taking any medication or supplement in the last month
- Incomplete completion of sociodemographic and scale data
- Not volunteering to participate in the study
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Observational model
- Case-control
Study locations
Turkey (Türkiye) · 1 center
- Elazığ Mental Health and Diseases Hospital Psychiatry Clinic — Elâzığ
Publications
- Quagliato LA, Nardi AE. Cytokine profile in drug-naive panic disorder patients. Transl Psychiatry. 2022 Feb 22;12(1):75. doi: 10.1038/s41398-022-01835-y. PMID 35194013
- Barbosa IG, Morato IB, de Miranda AS, Bauer ME, Soares JC, Teixeira AL. A preliminary report of increased plasma levels of IL-33 in bipolar disorder: further evidence of pro-inflammatory status. J Affect Disord. 2014 Mar;157:41-4. doi: 10.1016/j.jad.2013.12.042. Epub 2014 Jan 11. PMID 24581826
- Liu CH, Hua N, Yang HY. Alterations in Peripheral C-Reactive Protein and Inflammatory Cytokine Levels in Patients with Panic Disorder: A Systematic Review and Meta-Analysis. Neuropsychiatr Dis Treat. 2021 Dec 7;17:3539-3558. doi: 10.2147/NDT.S340388. eCollection 2021. PMID 34908836
- Wieck A, Grassi-Oliveira R, do Prado CH, Rizzo LB, de Oliveira AS, Kommers-Molina J, Viola TW, Marciano Vieira EL, Teixeira AL, Bauer ME. Pro-inflammatory cytokines and soluble receptors in response to acute psychosocial stress: differential reactivity in bipolar disorder. Neurosci Lett. 2014 Sep 19;580:17-21. doi: 10.1016/j.neulet.2014.07.040. Epub 2014 Aug 1. PMID 25092610
- Brunoni AR, Supasitthumrong T, Teixeira AL, Vieira EL, Gattaz WF, Bensenor IM, Lotufo PA, Lafer B, Berk M, Carvalho AF, Maes M. Differences in the immune-inflammatory profiles of unipolar and bipolar depression. J Affect Disord. 2020 Feb 1;262:8-15. doi: 10.1016/j.jad.2019.10.037. Epub 2019 Oct 30. PMID 31693974
- Hoppe LJ, Ipser J, Gorman JM, Stein DJ. Panic disorder. Handb Clin Neurol. 2012;106:363-74. doi: 10.1016/B978-0-444-52002-9.00020-6. No abstract available. PMID 22608631
Identifiers
NCT: NCT07444879 · EMHDH-2025-2026-PD-IL33-ST2-CR