Two Arm, Double-blind, Phase III Study Assessing Efficacy and Safety of Ianalumab Versus Placebo, in Participants With Sjögren's Disease With High Symptom Burden
THALASSA
A Randomized, Double-blind, Placebo-controlled, 2-arm Multicenter Phase III Study to Assess the Efficacy and Safety of Ianalumab in Participants With Sjogren's Disease With High Symptom Burden (THALASSA)
1 other identifier
interventional
570
0 countries
N/A
Brief Summary
The purpose of this study is to demonstrate the efficacy and safety of ianalumab (VAY736) 300 mg administered subcutaneously (s.c.) monthly for 52 weeks in adult participants with Sjögren's disease who have high symptom burden.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_3
Started Jul 2026
Longer than P75 for phase_3
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
May 26, 2026
CompletedFirst Posted
Study publicly available on registry
June 2, 2026
CompletedStudy Start
First participant enrolled
July 15, 2026
ExpectedPrimary Completion
Last participant's last visit for primary outcome
August 14, 2029
Study Completion
Last participant's last visit for all outcomes
August 13, 2033
June 2, 2026
May 1, 2026
3.1 years
May 26, 2026
May 26, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Change from baseline in SSSD oral dryness score
The Sjögren's Syndrome Symptom Diary (SSSD) oral dryness score is a patient-reported measure assessing severity of mouth dryness. The mouth dryness symptom is scored daily on a numerical scale (higher scores = worse symptoms).
Baseline to Week 52
Secondary Outcomes (9)
Change from baseline in SSSD summary score
Baseline to Week 52
Change from baseline in ESSPRI score
Baseline to Week 52
Change from baseline in stimulated whole salivary flow (sSF)
Baseline to Week 52
Change from baseline in Patient's Global Assessment (PaGA) NRS score
Baseline to Week 52
Proportion of participants achieving SSSD response
Week 52
- +4 more secondary outcomes
Study Arms (2)
VAY736 - 300 mg
EXPERIMENTALVAY736 once monthly solution for injection for subcutaneous use.
Placebo
PLACEBO COMPARATORPlacebo once monthly solution for injection for subcutaneous use.
Interventions
Eligibility Criteria
You may qualify if:
- Male or female participants ≥ 18 years of age or as per country-specific legal adult age, whichever is higher
- Classification of Sjögren's disease according to ACR/EULAR 2016 criteria.
- Seropositive for anti-Ro/SSA antibodies at screening
- SSSD oral dryness score ≥ 5 and overall SSSD summary score ≥5 collected over 14 consecutive days during the Screening 2 period
- Screening ESSDAI biologic and/or hematologic domain \> 0 Note: laboratory abnormalities for scoring must be confirmed as associated with Sjögren's disease and not be due to other underlying conditions.
- Stimulated whole salivary flow (sSF) rate \> 0.3 mL/min at screening
- Participants taking hydroxychloroquine (≤ 400 mg/day) are allowed to continue their medication, and must have been on a stable dose for at least 4 weeks prior to screening, which should be maintained throughout the 52 weeks of the blinded treatment period.
- Predniso(lo)ne ≤ 5 mg/day or equivalent are allowed for up to 16 weeks post-randomization.
You may not qualify if:
- Presence of another autoimmune rheumatic disease that is active and constitutes the principal illness, specifically:
- Systemic sclerosis (SSc)
- Any other associated connective tissue disease (e.g., lupus nephritis (LN), large vessel vasculitis (LVV), Sharp syndrome (mixed connective tissue disease)) that is active and requires immunosuppressive treatment outside the scope of this trial and would impede on Sjögren's disease organ domain assessments.
- Concurrent diagnosis or history of fibromyalgia or overlapping inflammatory diseases
- Prior treatment with B-cell-depleting therapy (e.g., rituximab, other anti-CD20 mAb, anti-CD22 mAb, or anti-CD52 mAb) within:
- weeks prior to randomization, or
- As long as B-cell count is less than the lower limit of normal (LLN) or baseline value prior to receipt of previous B-cell-depleting therapy (whichever is lower) at Screening.
- Prior treatment with ianalumab
- Prior treatment with any of the following within the given period prior to Screening:
- Within 5 half-lives prior to Screening: iscalimab (anti-CD 40 mAb), belimumab (anti-BAFF mAb), abatacept (CTLA4-Fc Ig), anti-tumor necrosis factor alpha (TNFα) biologic agents, immunoglobulins (i.v./s.c.), plasmapheresis, any other investigational biologic medicines under investigation for Sjögren's disease
- Within 4 weeks OR drug-specific 5 half-lives elimination period (if longer than 4 weeks) prior to screening: i.v. or oral cyclophosphamide, mycophenolate mofetil (MMF), methotrexate, azathioprine, i.v. or oral cyclosporine A or any other immunosuppressants (e.g., JAK inhibitors or other kinase inhibitors).
- History of hypersensitivity to any of the study drugs or their excipients, or to drugs of similar chemical classes (e.g., mAb of IgG1 class) or to any of the constituents of the study drug formulation (sucrose, L-histidine hydrochloride/L-histidine, polysorbate 20).
Contact the study team to confirm eligibility.
Sponsors & Collaborators
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- TRIPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
May 26, 2026
First Posted
June 2, 2026
Study Start (Estimated)
July 15, 2026
Primary Completion (Estimated)
August 14, 2029
Study Completion (Estimated)
August 13, 2033
Last Updated
June 2, 2026
Record last verified: 2026-05
Data Sharing
- IPD Sharing
- Will share
Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com