A Phase 2 interventional study of DDY391 and Placebo in Sjögren's Disease, sponsored by Novartis Pharmaceuticals. Recruiting at 31 sites in 9 countries. Open to participants aged 18 Years to 100 Years. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by Novartis Pharmaceuticals (part of Novartis) · Phase 2, Interventional, and Treatment
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.
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.
330 studies on the registry are indexed under Sjogren's Syndrome; 99 are open to participants now.
This study's planned enrollment of 344 is above the median of 50 across 218 interventional studies indexed under Sjogren's Syndrome.
Browse Sjogren's Syndrome studies →Novartis Pharmaceuticals is the lead sponsor of 2,718 studies on the registry; 221 are open to participants now.
Of its 585 completed or terminated interventional studies of FDA-regulated products, 438 (75%) have results posted.
Counted across the registry records on this site, refreshed daily.
Key Inclusion Criteria:
- Positive anti-Ro (SSA) antibodies at screening. Participants negative for anti-Ro/SSA antibodies are eligible if they have documented previous showing evidence of salivary gland inflammation consistent with SjD.
Key Exclusion Criteria:
Exclusion based on medications being used for SjD:
Other protocol-defined inclusion/exclusion criteria may apply.
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
DDY391 dose level 1
Drug: DDY391
Matching placebo. At the Week 24 visit, all participants will be randomized to DDY391 dose level 1 or dose level 2.
Drug: DDY391 · Drug: Placebo
DDY391 dose level 1
Drug: DDY391
DDY391 dose level 2
Drug: DDY391
DDY391 dose level 3
Drug: DDY391
Matching placebo. At the Week 24 visit, all participants will be randomized to DDY391 dose level 1 or dose level 2.
Drug: DDY391 · Drug: Placebo
DDY391 dose level 1
Drug: DDY391
Matching placebo. At the Week 24 visit, all participants will be randomized to DDY391 dose level 1 or dose level 2.
Drug: DDY391 · Drug: Placebo
DDY391 dose level 1 DDY391 dose level 2 DDY391 dose level 3
Matching Placebo
Part A and B: Change from baseline in ESSDAI score
EULAR 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.
Time frame: Baseline, Week 24
Part C: Change from baseline in ESSPRI
EULAR 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).
Time frame: Baseline, Week 24
Part A and B: Change from baseline in ESSPRI
EULAR 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).
Time frame: Baseline, Week 24
Part A, B and C: Change from baseline in SSSD
Sjögren'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).
Time frame: Baseline, Week 24
Part A, B and C: Incidence and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)
To evaluate the safety and tolerability of multiple doses of DDY391.
Time frame: Baseline up to Week 52
Plan to share: Yes — 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
No publications or documents are linked to this record.
Started Aug 2026 (actual). Primary completion is estimated for Feb 2029, 29 months after the start.
Of 26 phase 2 interventional studies under Sjogren's Syndrome, half reached primary completion within 25 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 43. This study's planned 29 months is above that.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Studies of the drug tested here: DDY391