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Viral and Epigenetic Influences in CRSwNP

NCT05857228 · Status: ACTIVE_NOT_RECRUITING · Type: OBSERVATIONAL · Enrollment: 60

Last updated 2026-03-20

No results posted yet for this study

Summary

Background/rationale

While multiple disorders feature a Type 2 (T2) inflammation, triggers for T2 remains unknown. In Chronic Rhinosinusitis with Nasal Polyposis CRSwNP), a classic Type 2 disorder, dysfunction of the epithelial barrier is suggested by loss of epithelial cell differentiation, impaired response to wounding, and impairment of innate defense mechanisms. After unsuccessful attempts to describe T2 disorders solely by host genetic or environmental factors, the role of epigenetics in the modification of innate immune response and epithelial integrity appears an important unexplored mechanism for a novel appreciation of T2 disease.

In addition, the investigators explore the possibility that these changes may be induced by viral pathogens. This concept has been supported by the recent observation that SARS-CoV-2 viral reduction measures resulted in a reduction of the frequency of respiratory viruses and a concomitant reduction in chronic airway disease, suggesting a role for viruses in T2 disease.

Hypothesis

The investigators believe T2 chronic rhinosinusitis (CRSwNP) involves epigenetic mechanisms where external factors, possibly viruses, contribute to disease via epigenetic manipulation and/or chronic viral infection.

Objectives

The investigators aim to identify epigenetic signatures associated with T2 CRS and explore the contribution of viruses. Method A robust methylation profiling with extensive coverage will be used for epigenome-wide association studies in T2 CRS patients assessing healthy subjects, CRS patients in remission, and diseased patients undergoing surgery. Moreover, advanced transcriptomic and metagenomic methods will identify gene expression profiles and viruses. This proposal also includes a cross-sectional study of patients undergoing surgery to assess transcriptomic patterns and epigenetics at the single-cell level.

Expected outcome

The investigators expect to identify epigenetic biomarkers and implicate several pathogenic viruses to open new targets for novel therapies.

Conditions

  • Chronic Rhinosinusitis (Diagnosis)

Interventions

PROCEDURE

Endoscopic sinus surgery (ESS)

Endoscopic sinus surgery for removal of nasal polyps and sinus tissue.

Sponsors & Collaborators

  • Centre hospitalier de l'Université de Montréal (CHUM)

    lead OTHER

Principal Investigators

  • Martin Y. Desrosiers, MD · Centre hospitalier de l'Université de Montréal (CHUM)

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2023-05-18
Primary Completion
2026-09-30
Completion
2026-09-30

Countries

  • Canada

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 NCT05857228 on ClinicalTrials.gov