Clinical trial Recruiting at 1 site Interventional Ages 18 to 70

Understanding how inflammation affects smell in chronic rhinosinusitis

Official title: Upper Airway Inflammation and Olfaction: Mechanisms of Loss and Recovery

Run by Cliniques universitaires Saint-Luc- Université Catholique de Louvain · NCT06776042 · Data updated 2026-11-12

This study is testing whether a new treatment for inflammation can help improve the sense of smell in people with chronic rhinosinusitis and nasal polyps.

Quick facts

Study typeInterventional
Ages18 Years to 70 Years
SexAll
Enrollment140 (estimated)
SponsorCliniques universitaires Saint-Luc- Université Catholique de Louvain
Academic / other
Locations1 site (Brussels)
StatusRecruiting
StartedMay 22, 2023
Main results expectedSeptember 30, 2026
Study endsSeptember 30, 2026
Registry record updatedApril 27, 2026
Trial IDNCT06776042 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 to 70 with chronic rhinosinusitis and olfactory dysfunction.

Probably not a fit

Patients with active smoking habits, immune deficiencies, or certain nasal conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to investigate the mechanisms behind olfactory dysfunction in patients with chronic rhinosinusitis with nasal polyps. It will assess whether type 2 inflammation impacts the regeneration of the olfactory epithelium and if a treatment targeting T2 inflammatory cytokines can influence olfactory dysfunction. Participants will undergo olfactory testing and nasal brushing before and after a 3-month treatment period to evaluate changes in their sense of smell. The study focuses on understanding the relationship between inflammation and olfactory recovery.

Why it matters

Potential benefit: If successful, this study could lead to improved treatments for patients suffering from smell loss due to chronic rhinosinusitis.

How similar studies have gone: While the specific approach may be novel, similar studies have shown promise in understanding the relationship between inflammation and olfactory function.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* At least two of the following symptoms: nasal obstruction, rhinorrhoea, smell loss, facial pain for 12 weeks.
* Endoscopic visualisation of bilateral sinonasal polyps
* SSI (TDI) \< 30.75 and decreased sense of smell subjectively
* Eosinophilia \> 300/μl of blood Ku/l
* On a stable nasal steroid treatment for at least 4 weeks

Exclusion Criteria:

* Active smoking
* Primary and secondary immune deficiencies
* Ciliary diseases (cystic fibrosis, primary ciliary diskinesia)
* History of or current nasal malignancies
* \< 18 years and \> 70 years
* Patients unable to express consent
* Use of systemic corticosteroids for \< 4 weeks before visit 1 • Use of systemic or local antibiotics for \< 4 weeks before visit 1

Where it's running

  • Cliniques Universitaires Saint-Luc
    Brussels, Belgium
    Recruiting

Study contacts

  • Principal investigator: Valérie Hox, MD, PhD — Cliniques universitaires Saint-Luc- Université Catholique de Louvain
  • Study coordinator: Valérie Hox, MD, PhD
  • Email: valerie.hox@saintluc.uclouvain.be
  • Phone: +3227648675

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.