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Efficacy and Safety of Depemokimab Monotherapy Without Concomitant Use of Intranasal Corticosteroids (INCS) in Japanese participants with Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)

A Ph IV, single-arm, open-label study to evaluate the efficacy and safety of 100 mg SC depemokimab monotherapy without concomitant use of intranasal corticosteroids (INCS) in Japanese participants with chronic rhinosinusitis with nasal polyps (CRSwNP) who are inadequately controlled with standard treatment

Status
Active, not recruiting
Phases
Phase 4
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031260158
Enrollment
28
Registered
2026-05-27
Start date
2026-07-19
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic rhinosinusitis with nasal polyps (CRSwNP) who are inadequately controlled with standard trea

Interventions

The study will include an approximate 4-week run-in period followed by 52-week treatment period. Throughout the entire study, participants will be on the SoC for CRSwNP. Since this study's objective i

Sponsors

Okamasa Arisa
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - 18 years of age and older inclusive, at the time of signing the informed consent - Endoscopic bilateral NP score of at least 5 out of a maximum score of 8 (with a minimum score of 2 in each nasal cavity) assessed by the investigator - Participants who have had previous nasal surgery for the removal of nasal polyps, have used at least three consecutive days of systemic corticosteroids in the previous 2 years for the treatment of nasal polyps, or are medically unsuitable or intolerant to systemic corticosteroid - Participants presenting with severe nasal polyp symptoms defined as symptoms of nasal congestion/blockade/obstruction with moderate or severe severity and loss of smell or rhinorrhoea (runny nose) based on clinical assessment by the investigator - Presence of symptoms of chronic rhinosinusitis as described by at least 2 different symptoms for at least 12 weeks prior to Visit 1, one of which should be either nasal blockage/obstruction/congestion or nasal discharge (anterior/posterior nasal drip), or facial pain/pressure and/or reduction or loss of smell - Male or eligible female participants

Exclusion criteria

Exclusion criteria: - As a result of medical interview, physical examination, or screening investigation the physician responsible considers the participant unfit for the study - Cystic fibrosis - Antrochoanal polyps - Nasal cavity tumor (malignant or benign) - Fungal rhinosinusitis - Severe nasal septal deviation occluding one nostril preventing full assessment of nasal polyps in both nostrils - Participants who had a sino-nasal or sinus surgery changing the lateral wall structure of the nose making impossible the evaluation of nasal polyp score - Acute sinusitis or URTI at screening or in 2 weeks prior to screening - Ongoing rhinitis medicamentosa (rebound or chemical induced rhinitis) - Participants who have had an asthma exacerbation requiring admission to hospital within 4 weeks of screening - Participants who have undergone any intranasal and/or sinus surgery (for example polypectomy, balloon dilatation or nasal stent insertion) within 6 months prior to Visit 1; nasal biopsy prior to Visit 1 for diagnostic purposes only is excepted. - Participants where NP surgery is contraindicated in the opinion of the Investigator - Participants with other conditions that could lead to elevated eosinophils such as hyper-eosinophilic syndromes including (but not limited to) Eosinophilic granulomatosis with polyangiitis (EGPA) (formerly known as Churg-Strauss Syndrome) or Eosinophilic Esophagitis - Participants with a known, pre-existing parasitic infestation within 6 months prior to Visit 1 - A known immunodeficiency (e.g., human immunodeficiency virus - HIV), other than that explained by the use of corticosteroids (CSs) taken as therapy for asthma - A current malignancy or previous history of cancer in remission for less than 12 months prior to screening.NOTE: Participants that had localised carcinoma of the skin which was resected for cure will not be excluded - Participants who have known, pre-existing, clinically significant cardiac, endocrine, autoimmune, metabolic, neurological, renal, gastrointestinal, hepatic, hematological or any other system abnormalities that are uncontrolled with standard treatment - Participants with current diagnosis of vasculitis. Participants with high clinical suspicion of vasculitis at screening will be evaluated and current vasculitis must be excluded prior to enrolment - Participants with allergy/intolerance to the excipients of depemokimab, a monoclonal antibody, or biologic - Participants that have been exposed to ionizing radiation in excess of 10 millisievert (mSv) above background over the previous 3-year period as a result of occupational exposure or previous participation in research studies - Participants using INCS (including intranasal liquid steroid wash/douching) for at least 8 weeks immediately prior to screening - Participants on inhaled corticosteroids exhalation through nose (Inhaled corticosteroids exhalation through nose [ICS/ETN]) method of administration for their asthma and NP for at least the 8 weeks immediately prior to screening - Participants who have received depemokimab (Exdensur), mepolizumab (Nucala), reslizumab (Cinqair/Cinqaero), or benralizumab (Fasenra) within 12 months prior to Visit 1 or experienced treatment failure with monoclonal antibodies targeting IL-5/5R - Participants who have received omalizumab (Xolair), dupilumab (Dupixent) or Tezpelumab (Tezpire) within 130 days prior to Visit 1 - Previously participated in any study with depemokimab, mepolizumab, reslizumab, or benraliz

Design outcomes

Primary

MeasureTime frame
- Achieving a one point or greater decrease from baseline in total endoscopic NP Score at Week 52 (centrally read) without first having nasal surgery (actual) or disease-modulating medication for CRSwNP

Secondary

MeasureTime frame
- Change from baseline in total endoscopic NP score at Week 52 (centrally read) - Change from baseline in mean nasal obstruction score (VRS) from Week 49 through to Week 52 - Change from baseline in mean symptom score for rhinorrhoea (runny nose) (VRS) from Week 49 through to Week 52 - Change from baseline in mean symptom score for loss of smell (VRS) from Week 49 through to Week 52 - Change from baseline in Lund Mackay CT score at Week 52 (centrally read) - Change from baseline in SNOT-22 total score at Week 52

Contacts

Public ContactArisa Okamasa

GlaxoSmithKline K.K.

jp.gskjrct@gsk.com+81-120-561-007

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026