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A Phase 2a/b Study to Assess the Efficacy, Safety and Tolerability of DDY391 in Participants With Sjögren's Disease

A Randomized, Double-blind, Placebo-controlled, Multicenter Phase 2a/b Study Assessing the Efficacy, Safety and Tolerability of DDY391 in Participants With Sjögren's Disease

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07737743
Enrollment
344
Registered
2026-07-30
Start date
2026-08-24
Completion date
2029-03-19
Last updated
2026-09-09

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

Conditions

Sjögren's Disease

Keywords

Sjögren's Disease, ESSDAI, ESSPRI

Brief summary

To evaluate efficacy, safety, and tolerability of DDY391 up to 52 weeks in participants with Sjögren's disease (SjD) and to determine the dose response relationship of DDY391 in participants with SjD, to support dose selection for Phase 3.

Detailed description

This study is a Phase 2a/b, randomized, double-blind, placebo-controlled, multi-center trial involving participants with SjD. The study consists of three parts (Part A, Part B, and Part C). The study includes a screening period of up to 8 weeks to assess eligibility, a 52-week treatment period, and a 4-week safety follow-up period after the last dose of study treatment.

Interventions

DRUGDDY391

DDY391 dose level 1 DDY391 dose level 2 DDY391 dose level 3

DRUGPlacebo

Matching Placebo

Sponsors

Novartis Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 100 Years
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: • Participants must have a diagnosis of SjD according to the ACR/EULAR 2016 classification criteria at screening: \- Positive anti-Ro (SSA) antibodies at screening. Participants negative for anti-Ro/SSA antibodies are eligible if they have documented previous biopsy showing evidence of salivary gland inflammation consistent with SjD. Key

Exclusion criteria

* Presence of another autoimmune rheumatic disease that is active at screening and constitutes the principal illness. * Exclusion based on medications being used for SjD: * Participants taking \> 400 mg/day hydroxychloroquine are excluded. Participants taking ≤400 mg/day hydroxychloroquine should be on a stable dose for at least 4 weeks prior to randomization. * Participants taking \> 400 mg/day hydroxychloroquine are excluded. Participants on ≤ 400 mg/day of hydroxychloroquine should be on a stable dose for at least 4 weeks prior to randomization. * Prior treatment with any of the following within 3 months prior to randomization: belimumab, abatacept, anti-tumor necrosis factor alpha biologic agents, immunoglobulins, plasmapheresis, intravenous (i.v.) or oral cyclophosphamide, mycophenolate mofetil, i.v. or oral cyclosporine A, or any other immunosuppressants (e.g., JAK inhibitors or other kinase inhibitors, IL-2, anti-IL-6, anti-IL-17). * Previous treatment with any cell-depleting therapies, including but not limited to anti-CD20, unless ≥ 12 months prior to screening. * Any viral, bacterial or other infections at the time of screening or randomization, or history of recurrent clinically significant infection or of recurrent bacterial infection. * History of malignancy of any organ system (other than localized non melanoma carcinoma of the skin or in situ cervical cancer) within the last five years of randomization or any malignancy not in remission. Other protocol-defined inclusion/

Design outcomes

Primary

MeasureTime frameDescription
Part A and B: Change from baseline in ESSDAI scoreBaseline, Week 24EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) is a validated tool for assessing disease activity in SjD. Score range is 0-123. Higher scores on the ESSDAI scale are associated with poorer health states. A negative change from baseline indicates improvement in disease status.
Part C: Change from baseline in ESSPRIBaseline, Week 24EULAR Sjögren's Syndrome Patient Reported Index (ESSPRI) is a validated disease outcome measure for SjD. It consists of three domains of dryness, pain, and fatigue. The participant will assess severity of symptoms they experienced over the last 14 days on a single 0-10 numerical rating scale for each of the three domains. The ESSPRI score is defined as the mean of scores from the three scales: (dryness + pain + fatigue) /3. The total ESSPRI score ranges from 0 (no symptoms) to 10 (maximal symptom severity).

Secondary

MeasureTime frameDescription
Part A and B: Change from baseline in ESSPRIBaseline, Week 24EULAR Sjögren's Syndrome Patient Reported Index (ESSPRI) is a validated disease outcome measure for SjD. It consists of three domains of dryness, pain, and fatigue. The participant will assess severity of symptoms they experienced over the last 14 days on a single 0-10 numerical rating scale for each of the three domains. The ESSPRI score is defined as the mean of scores from the three scales: (dryness + pain + fatigue) /3. The total ESSPRI score ranges from 0 (no symptoms) to 10 (maximal symptom severity).
Part A, B and C: Change from baseline in SSSDBaseline, Week 24Sjögren's Syndrome Symptom Diary (SSSD) includes six items specific to SjD (eye dryness, mouth dryness skin dryness, tiredness, muscle and/or joint pain, and genital dryness). The total score ranges from 0 (no symptoms) to 10 (maximal symptom severity).
Part A, B and C: Incidence and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)Baseline up to Week 52To evaluate the safety and tolerability of multiple doses of DDY391.

Countries

Australia, Canada, Israel, United States

Contacts

CONTACTNovartis Pharmaceuticals
novartis.email@novartis.com1-888-669-6682

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 10, 2026