ClinicalTrials.gg
Not yet recruitingNCT07836660Updated Sep 23, 2026

A Study of IBI355 in Participants With Moderate-to-Severe Sjögren's Disease

A Phase 2 interventional study of Part A - Placebo for IBI355 and Part B -Telitacicept in Sjögren's Disease, sponsored by Innovent Biologics (Suzhou) Co. Ltd.. Not yet recruiting at 1 site in China. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-09-23.

Sponsored by Innovent Biologics (Suzhou) Co. Ltd. (part of Innovent Biologics, Inc.) · Phase 2, Interventional, and Treatment

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Phase
Phase 2
Study type
Interventional
Enrollment
198
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 55 studies in Sjogren's Syndrome with a site in China — 28 open to participants now, 32 under way, 5 of them phase 3. Sjogren's Syndrome · China.

Planned enrollment
10th of 47
198 · median 30
Started
2026
with 12 others
Phase 2
7 of 55
3 open now
Primary completion
2027-11
later than 21 of 31 live
Registered
53rd of 55
by date

Among the 55 studies in Sjogren's Syndrome with a site in China, this one is the 10th largest by planned enrollment of the 47 interventional ones that give a count, is one of 13 that started in 2026, is one of 7 in phase 2, reaches primary completion later than 21 of the 31 other live ones, and was the 53rd registered.

Sjogren's Syndrome

330 studies on the registry are indexed under Sjogren's Syndrome; 99 are open to participants now.

Browse Sjogren's Syndrome studies →

Open to participants now

28 of the 55 studies in Sjogren's Syndrome with a site in China are open now. Recruiting first, the newest first:

23 more — sign in →

All 28 open studies →

A study can be open while its sites in China have not opened yet or have stopped. Only those recruiting at a site in China →

Who these studies take

Of the 67 Sjogren's Syndrome studies recruiting now, 26 (39%) set no upper age limit and 25 (37%) stop at 75 or younger; 9 take children under 18; 11 take healthy volunteers.

This study: 18 Years to 75 Years · all sexes · no healthy volunteers.

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02

Study summary

This is a Phase II, multicenter, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of IBI355 in participants with moderate-to-severe Sj?gren's disease (SjD).

Read the detailed description

This study is a randomized, double-blind, placebo-controlled Phase II study in participants with moderate-to-severe Sjögren's disease. Eligible participants will be randomized to receive IBI355 or placebo during the double-blind treatment period.

The study will evaluate the efficacy of IBI355 in reducing systemic disease activity and improving patient-reported symptoms and disease-related functional outcomes. Safety and tolerability will be assessed throughout the study. Pharmacokinetic, immunogenicity, pharmacodynamic, and other relevant clinical assessments will also be performed as specified in the protocol.

The results of this study are intended to characterize the efficacy and safety profile of IBI355 in participants with Sjögren's disease and to support its further clinical development.

03

Conditions studied

  • Sjögren's Disease

Browse trials for

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age ≥18 and ≤75 years.
  • Diagnosis of Sjögren's syndrome per 2016 ACR/EULAR classification criteria.
  • Duration of Sjögren's syndrome diagnosis ≤7.5 years.
  • Serum anti-Ro/SSA (Ro60 and/or Ro52) positive.
  • Stimulated whole saliva flow rate ≥0.05 mL/min at screening.
  • Baseline ESSDAI score ≥5 in ≥1 of the following domains: systemic, lymphadenopathy, glandular, articular, cutaneous, renal, hematologic, biological.
  • Stable background therapy (hydroxychloroquine ≤400 mg/day, methotrexate ≤25 mg/week, or azathioprine ≤150 mg/day) for ≥12 weeks with stable dose ≥8 weeks prior to randomization.
  • Stable oral dose (≤10 mg/day prednisone equivalent) for ≥4 weeks prior to randomization.

Exclusion criteria

Exclusion Criteria:

  • Known to IBI355 or its .
  • Pregnancy or breastfeeding.
  • Uncontrolled interstitial lung disease (ILD) associated with Sjögren's syndrome (e.g., FVC \<70% predicted, ClinESSDAI pulmonary domain indicating severe activity, or Class III/IV dyspnea).
  • Active or untreated latent tuberculosis (IGRA-positive without ≥1 month prophylactic treatment).
  • Chronic (HBsAg+), (HCV RNA+), , or syphilis.
  • Prior use of rituximab, other anti-CD20 agents, or other biologics targeting 0/CD40L, BAFF/APRIL, or within 6 months prior to randomization.
  • Use of JAK/TYK inhibitors within 8 weeks prior to randomization.
Terms in these criteria, in plain language(9)

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.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

CD4 count

The number of CD4 cells, a type of white blood cell, in a given amount of blood. It is used to follow how well the immune system is doing in HIV.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
198 participants (estimated)

Study arms

  • Experimental
    Part A: IBI355 group

    IBI355,IV,corresponding dose regimen according to study cohort( Part A) .

    Drug: Part A - Placebo for IBI355 · Drug: Part A - IBI355

  • Experimental
    Part B: Telitacicept 160 mg group

    Participants received telitacicept 160 mg SC QW from Week 0 to Week 24. Follow-up through Week 36

    Drug: Part B -Telitacicept

  • Experimental
    Part A: Placebo group(IBI355-matched)

    Matching placebo of IBI355, IV ,corresponding dose regimen according to study design

    Drug: Part A - Placebo for IBI355 · Drug: Part A - IBI355

  • Experimental
    Part B: Placebo group (Telitacicept-matched)

    Participants received matching placebo SC QW from Week 0 to Week 24. Follow-up through Week 36.

    Drug: PartB -Placebo for Telitacicept

Interventions

  • DrugPart A - Placebo for IBI355

    Matching placebo of IBI355, IV ,corresponding dose regimen according to study design

  • DrugPart B -Telitacicept

    Telitacicept 160 mg SC QW × 24 doses (Weeks 0-24).

  • DrugPartB -Placebo for Telitacicept

    Matching placebo of Talitacicept ,SC QW × 24 doses.

  • DrugPart A - IBI355

    IBI355,IV,corresponding dose regimen according to study design

06

What researchers measure

Primary outcomes

  1. Change from Baseline in EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) Score at Week 24

    The EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) is a physician-assessed index used to evaluate systemic disease activity in Sjögren's disease. The total score ranges from 0 to 123, with higher scores indicating greater systemic disease activity. A decrease from baseline indicates improvement.

    Time frame: Baseline and Week 24

Secondary outcomes

  1. Change from Baseline in ESSDAI Score at Weeks 12 and 48

    The EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) is a physician-assessed index used to evaluate systemic disease activity in Sjögren's disease. The total score ranges from 0 to 123, with higher scores indicating greater systemic disease activity. A decrease from baseline indicates improvement.

    Time frame: Baseline to Weeks 12 and 48

  2. Change from Baseline in EULAR Sjögren's Syndrome Patient Reported Index (ESSPRI) Score at Weeks 12, 24, and 48

    The EULAR Sjögren's Syndrome Patient Reported Index (ESSPRI) is a patient-reported measure assessing dryness, fatigue, and pain. Each domain is rated on a 0-to-10 numerical rating scale, and the total ESSPRI score is calculated as the mean of the three domain scores, ranging from 0 to 10. Higher scores indicate greater symptom severity. A decrease from baseline indicates improvement.

    Time frame: Baseline to Weeks 12, 24, and 48

  3. Change from Baseline in Stimulated Salivary Flow (sSF) Rate at Weeks 12, 24, and 48

    Stimulated salivary flow rate will be measured according to the protocol-specified procedure. An increase from baseline indicates an improvement in stimulated salivary gland function.

    Time frame: Baseline to Weeks 12, 24, and 48

  4. Change from Baseline in Schirmer Test at Week 48

    The Schirmer test is used to assess tear production and is reported as the length of wetting of the test strip over 5 minutes, measured in millimeters (mm/5 min). Higher values indicate greater tear production.

    Time frame: Baseline to Week 48

  5. Change from Baseline in Sj?gren's Tool for Assessing Response (STAR) Score at Week 48

    The Sj?gren's Tool for Assessing Response (STAR) is a composite assessment of treatment response in Sj?gren's disease incorporating systemic disease activity, patient-reported symptoms, and biological and glandular domains. Higher scores indicate a greater treatment response.

    Time frame: Baseline to Week 48

  6. Change from Baseline in Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-Fatigue) Score at Weeks 12, 24, and 48

    The FACIT-Fatigue scale is a 13-item patient-reported measure of fatigue. The total score ranges from 0 to 52, with higher scores indicating less fatigue and better functioning. An increase from baseline indicates improvement.

    Time frame: Baseline to Weeks 12, 24, and 48

  7. Change from Baseline in EuroQol 5-Dimension 5-Level (EQ-5D-5L) Index Score at Weeks 12, 24, and 48

    The EQ-5D-5L is a standardized measure of health status assessing five dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Each dimension has five levels of severity. Responses are converted to an EQ-5D-5L index score using the prespecified value set, with higher index scores indicating better health status.

    Time frame: Baseline to Weeks 12, 24, and 48

  8. Incidence of Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)

    The number and percentage of participants experiencing treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs) will be assessed throughout the study.

    Time frame: From the first dose of study intervention through Week 48

07

Study locations

1 site
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Oct 2026; primary completion for Nov 2027, 12 months later.

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 12 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Sep 13, 2026
First posted
Sep 23, 2026
StartEst.
Oct 15, 2026
Primary completionEst.
Nov 1, 2027
CompletionEst.
Oct 31, 2028
Last update
Sep 23, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 23, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT07836660
Responsible party
Sponsor
First posted
Sep 23, 2026
Start date
Oct 15, 2026 (estimated)
Primary completion
Nov 1, 2027 (estimated)
Completion
Oct 31, 2028 (estimated)
Last update
Sep 23, 2026

Study contacts

xiaoyan li
Contact
xiaoyan.li@innoventbio.com
18756032014

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.

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