A Study to Evaluate Mosunetuzumab in Participants With Systemic Lupus Erythematosus With or Without Active Lupus Nephritis (SOLUNA)

May 27, 2026 updated by: Hoffmann-La Roche

A Phase II Open-Label Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of Mosunetuzumab in Patients With Systemic Lupus Erythematosus With or Without Active Lupus Nephritis

This study will assess how mosunetuzumab works in people who have systemic lupus erythematosus (SLE) who may or may not also have active lupus nephritis (LN).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
30

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Brazil
    • Estado de Bahia
      • Salvador, Estado de Bahia, Brazil, 40150-150
        • Recruiting
        • Clnica SER da Bahia
    • Federal District
      • Brasília, Federal District, Brazil, 70200-730
        • Recruiting
        • L2IP ?Instituto de Pesquisas Clínicas Ltda.
    • Mato Grosso
      • Cuiab, Mato Grosso, Brazil, 78020-500
        • Recruiting
        • IPC MT Instituto de Pesquisas Clinicas do Mato Grosso
    • Rio Grande do Sul
      • Porto Alegre, Rio Grande do Sul, Brazil, 90480-000
        • Recruiting
        • LMK Servios Mdicos S/S Ltda
    • Rio de Janeiro
      • Niterói, Rio de Janeiro, Brazil, 24030-103
        • Recruiting
        • Complexo Hospitalar de Niteroi
    • São Paulo
      • Ribeiro Preto, São Paulo, Brazil, 14048-900
        • Recruiting
        • Hospital das Clinicas de Ribeirao Preto
      • São Paulo, São Paulo, Brazil, 05403-000
        • Recruiting
        • Hospital das Clnicas da Faculdade de Medicina da USP
  • Colombia
      • Barranquilla, Colombia, 080020
        • Recruiting
        • Clínica de la Costa S.A.S
      • Bogotá, Colombia, 110221
        • Recruiting
        • Centro de Investigacion en Reumatologia y Especialdades Medicas SAS. CIREEM
      • Medellín, Colombia, 050034
        • Recruiting
        • Hospital Pablo Tobón Uribe
  • Italy
    • Lazio
      • Rome, Lazio, Italy, 00168
        • Recruiting
        • Fondazione Policlinico Universitario Agostino Gemelli Irccs
    • Lombardy
      • Brescia, Lombardy, Italy, 25123
        • Recruiting
        • Azienda Socio Sanitaria Territoriale degli Spedali Civili di Brescia (Presidio Spedali Civili)
  • South Africa
    • Gauteng
      • Pretoria, Gauteng, South Africa, 0002
        • Recruiting
        • Emmed Research
    • Western Cape
      • Cape Town, Western Cape, South Africa, 7925
        • Recruiting
        • University of Cape Town Kidney and Hypertension Research Unit
      • Somerset West, Western Cape, South Africa, 7130
        • Recruiting
        • Clinical Trials Network Helderberg

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Diagnosis of SLE for ≥ 6 months as assessed using the 2019 European League Against Rheumatism/American College of Rheumatology (EULAR/ACR) Classification Criteria at screening

Exclusion Criteria:

  • Pregnant or breastfeeding, or intention of becoming pregnant during the study or within the time frame in which contraception is required
  • Treatment with investigational therapy within 30 days or 5 drug-elimination half-lives (whichever is longer) prior to initiation of study treatment and during the study
  • Major surgery requiring hospitalization during the 4 weeks prior to screening or during screening, or any planned surgery or procedure requiring hospitalization during the 12 weeks following study drug administration
  • Alcohol or substance abuse within the 12 months prior to screening
  • Active infection of any kind, excluding fungal infection of the nail beds
  • Any major episode of infection as defined by the protocol
  • History of serious recurrent or chronic infection
  • History of progressive multifocal leukoencephalopathy (PML)
  • Tuberculosis (TB) infection
  • History of cancer, including solid tumors, hematological malignancies, and carcinoma in situ, within the past 5 years
  • Active overlap syndrome with mixed connective tissue disease or systemic sclerosis within the 12 months prior to screening or during screening
  • Catastrophic or severe antiphospholipid syndrome within the 12 months prior to screening or during screening. Antiphospholipid syndrome adequately controlled by anticoagulant therapy for at least 2 months prior to screening is acceptable
  • High risk for clinically significant bleeding or any condition requiring plasmapheresis, IV immunoglobulin, or acute blood product transfusions
  • Active severe or unstable lupus-associated neuropsychiatric disease or where, in the opinion of the investigator, it is likely to require treatment with protocol-disallowed therapies. Examples of neuropsychiatric SLE manifestations include, but are not limited to the following: meningitis, retinitis, cerebral vasculitis, myelopathy, demyelination syndromes, acute confusional state, psychosis, acute stroke or stroke syndrome, cranial neuropathy, status epilepticus or seizures, cerebellar ataxia, and mononeuritis multiplex
  • History of any non-SLE disease treated with oral, intravenous, or intramuscular corticosteroids for more than 14 days in total during the one year prior to Day 1
  • History of treatment with any T cell-engaging bispecific antibodies or CAR-T therapy within the past 2 years
  • Receipt of any live or attenuated vaccine in the 28 days prior to or during screening

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Mosunetuzumab
Participants will receive mosunetuzumab by subcutaneous (SC) injection.
Drug: Mosunetuzumab
Participants will receive SC mosunetuzumab.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Proportion of participants who have achieved remission by Week 76
Time Frame: Up to Week 76
Drug-Free Remission is defined as achieving both of the following: Absence of disease activity maintained for 6 months after completion of mosunetuzumab treatment, and; not receiving any SLE-directed therapy (except for antimalarials) during the 6 months. Doses of prednisone (or equivalent) ≤5 mg/day to treat secondary adrenal insufficiency are permitted.
Up to Week 76

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Percentage of participants with adverse events (AEs)
Time Frame: Up to 2.5 years
Up to 2.5 years
Serum concentration of mosunetuzumab
Time Frame: Up to 2.5 years
Up to 2.5 years
Proportion of participants who achieve Definition of Remission in SLE (DORIS) by Week 76
Time Frame: Up to Week 76
DORIS remission is defined as achievement of all of the following for at least 6 months: Clinical systemic lupus erythematosus disease activity index (cSLEDAI) = 0 after completion of mosunetuzumab treatment; stable dosing of SLE therapies for at least 6 months; Physician Global Assessment (PGA) of < 0.5, and; prednisone (or equivalent) dose ≤5 mg/day.
Up to Week 76
Proportion of participants who achieve Complete Renal Response (CRR) at Weeks 24, 52, 76, and 104
Time Frame: Weeks 24, 52, 76, and 104
CRR is defined as all of the following: Urinary protein-to-creatinine ratio (UPCR) < 0.5 g/g, and; estimated glomerular filtration rate (eGFR) ≥ 85% of baseline, as calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation or ≥ 60 ml/min per 1.73 m^2 of body-surface area.
Weeks 24, 52, 76, and 104
Proportion of participants who achieve Partial Renal Response (PRR) at Weeks 24, 52, 76, and 104
Time Frame: Weeks 24, 52, 76, and 104
PRR is defined as all of the following: ≥ 50% reduction in UPCR from baseline; UPCR < 1 g/g (or < 3 g/g if the baseline UPCR was ≥ 3 g/g), and; eGFR ≥85% of baseline, as calculated using the CKD-EPI equation.
Weeks 24, 52, 76, and 104
Longitudinal change in titers of anti-double-stranded (ds) DNA
Time Frame: Up to 2.5 years
Up to 2.5 years
Longitudinal changes in complement C3 and C4
Time Frame: Up to 2.5 years
Up to 2.5 years
Percentage of participants with anti-drug antibodies (ADAs)
Time Frame: Baseline up to 2.5 years
Baseline up to 2.5 years
CD19+ absolute counts in blood
Time Frame: Up to 2.5 years
Up to 2.5 years
Change in Functional Assessment of Chronic Illness Therapy (FACIT) - Fatigue
Time Frame: Baseline to Week 76
Baseline to Week 76
Change in Subject's Global Assessment of Disease Activity (SGA)
Time Frame: Baseline to Week 76
Baseline to Week 76

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Hoffmann-La Roche

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Clinical Trials, Hoffmann-La Roche

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 25, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
February 28, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 31, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 2, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 14, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 20, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 27, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • GA45799
  • 2024-519930-22-00 (Ctis)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

For eligible studies, qualified researchers may request access to individual patient level clinical data. See Roche's commitment to transparency of clinical study information here: https://go.roche.com/data_sharing

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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