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Expression of TSLP Isoforms in Asthma

NCT07786870 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 70

Last updated 2026-08-26

No results posted yet for this study

Summary

Asthma is a heterogeneous disease characterized by chronic airway inflammation, leading to variable airflow obstruction, bronchial hyperresponsiveness, excessive mucus secretion, and, consequently, structural airway remodeling. Asthma is defined by the presence of symptoms such as wheezing, dyspnea, chest tightness, and cough, with variable intensity and frequency.

Thymic stromal lymphopoietin (TSLP) is a cytokine produced primarily by epithelial cells in the lungs. Two distinct isoforms of TSLP have been identified: a long form (lfTSLP) and a short form (sfTSLP). The long isoform is induced during inflammatory conditions and promotes a T2-dependent immune response. In contrast, the short isoform is believed to exert homeostatic and anti-inflammatory functions and exhibits antimicrobial properties.

Studies have demonstrated an association between elevated serum and airway TSLP levels and increased disease severity, as well as reduced spirometric parameters. However, the literature contains limited data regarding the expression of TSLP isoforms across different asthma phenotypes and their relationship with the degree of disease control.

The goal of this study is:

1. To assess the expression of TSLP protein and TSLP mRNA, including its isoforms (sfTSLP and lfTSLP), in serum and in airway-derived samples (nasal epithelial cells),
2. To compare these levels among patients with different asthma phenotypes (allergic and non-allergic asthma; eosinophilic, neutrophilic, and paucigranulocytic asthma; early-onset and late-onset asthma; obesity-associated asthma; cough-variant asthma), as well as between patients with asthma and healthy controls.
3. To analyze the correlations between the expression of TSLP isoforms (sfTSLP and lfTSLP) and asthma severity, level of disease control (as measured by the Asthma Control Questionnaire \[ACQ\]), pulmonary function parameters, blood eosinophil count and other clinical parameters.

Conditions

  • Asthma Atopic
  • Asthma Severe Persistent Uncontrolled

Interventions

DIAGNOSTIC_TEST

No Intervention: Observational Cohort

This study is designed as a cross-sectional, observational investigation. No therapeutic or diagnostic interventions beyond routine clinical care will be introduced as part of the study. All procedures performed are limited to standard, minimally invasive sample collection and data acquisition for research purposes. Clinical management of participants will remain unchanged and will be conducted entirely at the discretion of the treating physicians. Participation in the study will not influence treatment decisions or patient care.

Sponsors & Collaborators

  • Medical University of Warsaw

    lead OTHER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-04-30
Primary Completion
2026-11-30
Completion
2026-11-30

Countries

  • Poland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07786870 on ClinicalTrials.gov