Safety, Tolerability, Pharmacokinetics, and Therapeutic Efficacy of SAR441344 in Primary Sjögren's Syndrome (pSjS) (phaethuSA)

  • End date
    Mar 8, 2024
  • participants needed
  • sponsor
Updated on 26 January 2023


Primary Objective:

To evaluate the therapeutic efficacy of one dose level of SAR441344 versus placebo over 12 weeks in adult patients with primary Sjögren's syndrome (pSjS), assessed by the change of the European League Against Rheumatism (EULAR) Sjögren's Syndrome Disease Activity Index (ESSDAI)

Secondary Objectives:

  • To evaluate the therapeutic efficacy of one dose level of SAR441344 versus placebo over 12 weeks in adult patients with pSjS
  • To evaluate the therapeutic efficacy on fatigue of one dose level of SAR441344 versus placebo over 12 weeks in adult patients with pSjS
  • To evaluate the pharmacokinetic (PK) exposure of one dose level of SAR441344 over 12 weeks in adult patients with pSjS
  • To evaluate the safety and tolerability of one dose level of SAR441344 versus placebo in adult patients with pSjS as determined by adverse events (AEs)
  • To evaluate the local tolerability of one dose level of SAR441344 versus placebo over 12 weeks in adult patients with pSjS
  • To evaluate the safety and tolerability of one dose level of SAR441344 versus placebo over 12 weeks in adult patients with pSjS determined by electrocardiogram, vital signs, and laboratory evaluations
  • To measure the immunogenicity of one dose level of SAR441344 versus placebo over 12 weeks in adult patients with pSjS

This is a multicenter, randomized, double blind, placebo controlled, parallel group proof of concept Phase 2 study to evaluate the therapeutic efficacy of SAR441344 in adult patients with primary Sjögren's syndrome (pSjS), as well as safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD).

  • Study visit frequency: every 2 weeks in the treatment period and every 4 weeks in the follow-up period.
  • The total duration of the study will be 24 weeks (28 weeks including maximum screening duration) for each participant, including a 12-week treatment period and a 12-week follow-up period.

Condition Sjögren's Syndrome
Treatment Placebo, SAR441344
Clinical Study IdentifierNCT04572841
Last Modified on26 January 2023


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Inclusion Criteria

Participant must be 18 to 80 years of age inclusive, at the time of signing the informed consent
Diagnosis of pSjS according to the American College of Rheumatology/EULAR 2016 criteria at Screening
Disease duration since first diagnosis of pSjS ≤15 years based on medical history
Participants with moderate to severe disease activity set with ESSDAI total score ≥5, based on the following domains at Screening: glandular, articular, muscular, hematological, biological, and constitutional, lymphadenopathy
Seropositive for anti-Ro/SSA antibodies
IgG > lower limit of normal (ULN) at Screening
Stimulated salivary flow rate of ≥0.1 mL/min at Screening or Baseline
Body weight within 45 to 120 kg (inclusive) and body mass index within the range of 18.0 to 35.0 kg/m2 (inclusive) at Screening
Contraceptive use by men or women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies
Capable of giving signed informed consent

Exclusion Criteria

Any autoimmune disease (except pSjS and Hashimoto thyroiditis) with or without secondary SjS
History, clinical evidence, suspicion or significant risk for thromboembolic events, as well as myocardial infarction, stroke, and/or antiphospholipid syndrome and any participants requiring antithrombotic treatment
Active life threatening or organ threatening complications of pSjS disease at the time of Screening based on treating physician evaluation including but not restricted to
Vasculitis with renal, digestive, cardiac, pulmonary, or CNS involvement characterized as severe
Active central nervous system (CNS) or peripheral nervous system (PNS) involvement requiring high dose steroids
Severe renal involvement defined by objective measures
Cardiac heart failure Stage III or IV according to the New York Heart Association
Severe pulmonary impairment documented by an abnormal pulmonary function test
Serious systemic viral, bacterial or fungal infection (eg, pneumonia, pyelonephritis), infection requiring hospitalization or IV antibiotics or significant chronic viral (including history of recurrent or active herpes zoster), bacterial, or fungal infection (eg, osteomyelitis) 30 days before and during Screening
Participants with a history of invasive opportunistic infections, such as, but not limited to histoplasmosis, listeriosis, coccidioidomycosis, candidiasis, pneumocystis jirovecii, and aspergillosis, regardless of resolution
Evidence of active or latent tuberculosis (TB) as documented by medical history (eg, chest X rays) and examination, and TB testing: A positive or 2 indeterminate QuantiFERON® TB Gold tests at Screening (regardless of prior treatment status)
Evidence of any clinically significant, severe or unstable, acute or chronically progressive, uncontrolled infection or medical condition (eg, cerebral, cardiac, pulmonary, renal, hepatic, gastrointestinal, neurologic, or any known immune deficiency) or previous, active or pending surgical disorder, or any condition that may affect participant safety in the judgment of the Investigator (including vaccinations which are not updated based on local regulation)
History or presence of diseases which exclude diagnosis of SjS as per the American College of Rheumatology/EULAR 2016 criteria including, but not limited to, sarcoidosis, amyloidosis, graft-versus-host disease, IgG4 related disease, and history of head and neck radiation treatment
History of systemic hypersensitivity reaction or significant allergies, other than localized injection site reaction, to any humanized monoclonal antibody
Clinically significant multiple or severe drug allergies, intolerance to topical corticosteroids, or severe post treatment hypersensitivity reactions (including, but not limited to, erythema multiforme major, linear IgA dermatosis, toxic epidermal necrolysis, and exfoliative dermatitis)
Any prior history of malignancy or active malignancy, including lymphoproliferative diseases and lymphoma (except successfully treated carcinoma in situ of the cervix, nonmetastatic squamous cell or basal cell carcinoma of the skin) within 5 years prior to Baseline
Unstable dose of nonsteroidal anti inflammatory drugs (NSAIDs) and/or unstable use of topical and/or pharmacological stimulant treatment for salivary and lacrimal glands 4 weeks before Screening
High dose steroids, or a change in steroid dose within 4 weeks prior to Day 1/Randomization or expected changes during the course of the study
High dose of hydroxychloroquine or chloroquine, or methotrexate or change in hydroxychloroquine, chloroquine or methotrexate dose within 12 weeks prior to Day 1/Randomization or expected changes during the course of the study
Participants treated with the following medications/procedures prior to Screening
Previous treatment with azathioprine and other thiopurines, mycophenolate mofetil, sulfasalazine, or cyclosporine A within 3 months
Previous treatment with cyclophosphamide, leflunomide, or belimumab within 6 months
Previous treatment with rituximab within 12 months
Previous bone marrow transplantation, total lymphoid irradiation or ablative ultra high dose cyclophosphamide or IV Ig
Previous treatment with any other biologic drug within 5 times the half life of the drug
Received administration of any live (attenuated) vaccine within 3 months prior to Day
Randomization (eg, varicella zoster vaccine, oral polio, rabies)
Clinically significant abnormal ECG or vital signs at Screening
Abnormal laboratory test(s) at Screening
Positive human immunodeficiency virus (HIV) serology (anti HIV1 and anti HIV2 antibodies) or a known history of HIV infection, active or in remission
Positive result on any of the following tests: hepatitis B surface antigen (HBsAg), anti hepatitis B core antibodies (anti HBc Ab), anti hepatitis C virus antibodies (HCV-Ab)
If female, pregnant and/or breastfeeding
The above information is not intended to contain all considerations relevant to a patient's
potential participation in a clinical trial
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