Systemic Lupus ErythematosusPhase 1NCT07219563
Alnuctamab for Refractory SLE (LATTE Study)
A Phase 1 study testing Alnuctamab in people with Systemic Lupus Erythematosus, run by Icahn School of Medicine at Mount Sinai at 1 site in United States.
Trial summary
This study will assess the safety and preliminary efficacy of the bi-specific TCE, alnuctamab (known as BMS-986349, CC-93269, EM901), targeting BCMA in patients with moderate to severe SLE, refractory to standard-of-care treatments. Read more about this study
- Who is it for?
- Ages 18 to 60 years
- Conditions the study is for
- Systemic Lupus Erythematosus
- What is being tested?
- Alnuctamab
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 21 participants
- Where
- 1 siteUnited States
- Study dates
- 17 Mar 2026to 1 Dec 2027
- Phase
- Phase 1
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 60 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Age 18-60 years.
- Documented diagnosis of SLE fulfilling 2019 ACR/EULAR criteria.
- Historical documentation of ANA (1:80 or greater) autoantibody on immunofluorescence as well as presence of at least 1 additional autoantibody of the type: anti-dsDNA, anti-histone, anti-chromatin, anti-Smith, anti-RNP, anti-Ro/SSA, anti-La/SSB, anti-cardiolipin (IgG), or anti-beta2-glycoprotein1 (IgG).
- History of SLE that is refractory to corticosteroids and at least 2 immunosuppressive therapies with different mechanisms of action (methotrexate, thiopurines, mycophenolate mofetil, calcineurin inhibitors, biologic agents, cyclophosphamide), including at least one biologic therapy (e.g. anti-CD20 therapy, anifrolumab, belimumab) or cyclophosphamide. Of note, hydroxychloroquine is not considered an immunosuppressive therapy, and methotrexate/azathioprine counts as a single drug class).
- Total SLEDAI-2K >6 with clinical SLEDAI-2K >4, or >1 BILAG A organ domain score, or >2 BILAG B, but without active central nervous system (CNS) disease within the past year; a maximum of two participants with only arthritis and/or rash can be included if truly disabling
Who cannot join
- Autoimmune disease other than SLE, except associated Sjogren's Disease if not primary contributor to symptoms; coexistent fibromyalgia will be allowed if not primary contributor to symptoms.
- TTP-like SLE; catastrophic APS; LN WHO class V as primary qualifying criterion (unless overlap with Class III or IV), rapidly progressive LN, or eGFR <40 mL/min; active CNS pathology attributable to neuropsychiatric SLE.
- Active or suspected infection, including HIV.
- O2 sat <92% on room air; ANC <1500u/L, Hgb <8g/dL, Plt <75,000/uL; ALT or AST > 2X ULN (unless attributed to active myositis), Total Bilirubin >1.5 X ULN (unless Gilbert's Disease), total B cell count <12/microliter, hypogammaglobinemia <500mg/dL.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site, 1 recruiting
- Recruiting
Icahn School of Medicine at Mount Sinai
New York, New York, 10029
Chrisanna Dobrowolski, MD, 212-241-1671, latte@mssm.edu
Chrisanna Dobrowolski
About this study
Official title: Open-label, 4-Part Study to Investigate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of Alnuctamab (BMS-986349/CC-93269) in Participants With Moderate to Severe Refractory Systemic Lupus Erythematosus
This study will assess the safety and preliminary efficacy of the bi-specific TCE, alnuctamab (known as BMS-986349, CC-93269, EM901), targeting BCMA in patients with moderate to severe SLE, refractory to standard-of-care treatments.
Read the detailed description
The purpose of this research study is for researchers to learn if the investigational therapy called alnuctamab (known as BMS-986349, CC-93269, EM901) is safe and effective to treat refractory Systemic Lupus Erythematosus (SLE). CC-93269 is investigational, which means its safety and effectiveness have not been established and it is not approved by the U.S. Food and Drug Administration (FDA) for SLE. This will be the first study testing CC-93269 in SLE. Alnuctumab is a type of treatment known as a T cell engager. It is a special protein engineered in the laboratory, which is able to attach to T cells, a type of white blood cell that can kill other cells in the body. T cells normally protect the body from infections, for example by destroying the cells where the virus hides. In this case, alnuctumab will redirect T cells to a new target, called the plasma B cell. This is a type of white blood cell that plays an important role in activating the autoimmune response in patients with lupus. By linking T cells to the autoimmune plasma B cells, alnuctumab will allow the removal of these pathogenic cells. The goal is to evaluate whether this will be sufficient and safe to treat lupus.
- Conditions
- Systemic Lupus Erythematosus
- Being tested
- Alnuctamab
- Keywords
- Refractory, Systemic Lupus Erythematosus (SLE), Severe Refractory Systemic Lupus Erythematosus
- Medical subject headings
- Lupus Erythematosus, Systemic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AlnuctamabDrug
Also called EM901
The study drug will be given as an injection under the skin. For the first 9 days after the CC-93269 injection, subjects will be staying in the hospital. The goal of this study is to determine the optimal dose of CC-93269 to be safely administered to participants.
| Study group | Role | What they receive |
|---|---|---|
| Participants with Lupus | Experimental | This study drug will be done by sentinel dosing (study drug given to a small number of participants to watch closely) before all the participants receive the study drug. Receives: Drug: Alnuctamab |
What is being measured
The primary outcome is the main question the study is designed to answer.
Number of treatment emergent AEs
Type, frequency, and severity of treatment emergent AEs, SAEs, DLTs, and AEs of special interest (e.g., CRS, ICANS)
Measured: 9 days
Secondary outcomes (2)
Maximum concentration of Alnuctamab
The maximum concentration of Alnuctamab (Cmax) following multiple subcutaneous (SC) administrations in participants with moderate to severe SLE refractory to standard therapy
Measured: 0-29 days
Change in SLE Responder Index (SRI) rate
SLE Responder Index (SRI) rate at Week 24, Week 52 compared to baseline
SRI is defined as the proportion of participants achieving ≥4 point reduction in SLEDAI-2K [Systemic Lupus Erythematosus Disease Activity Index], with no new A organ domain score, ≤ 1 new BILAG [British Isles Lupus Assessment Group] B score, and no worsening of the Physician Global Assessment (PGA) score
SLEDAI-2K: Total score ranges from 0-105 with higher score indicating greater disease activity BILAG: B Score implies need for a modest dose of steroids. PGA: Score range from -3 (poorer health outcome) to 3 (better health outcome)
Measured: Baseline, Week 24 and Week 52
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Oct 2025
- Study start17 Mar 2026
- Primary completion1 Dec 2027 (estimated)
- Study completion1 Dec 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Systemic Lupus ErythematosusStudies of the same condition, open and under way.
- More trials run by Icahn School of Medicine at Mount SinaiThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Sequential
- Masking
- None (open label)
- Enrolment
- 21 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Icahn School of Medicine at Mount Sinai
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Chrisanna Dobrowolski, Icahn School of Medicine at Mount Sinai
- Investigators
- Chrisanna Dobrowolski, MD, Principal investigator, Icahn School of Medicine at Mount Sinai School
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07219563
- Sponsor's protocol ID
- STUDY-24-01686
- Status last verified
- Feb 2026
- First submitted
- 20 Oct 2025
- Last updated
- 21 Apr 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: All of the individual participant data collected during the trial, after de-identification.
Study at a glance
From the registry record, last updated by the sponsor on 21 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Open-label, 4-Part Study to Investigate the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of Alnuctamab (BMS-986349/CC-93269) in Participants With Moderate to Severe Refractory Systemic Lupus Erythematosus
- ClinicalTrials.gov ID
- NCT07219563
- Acronym / sponsor ID
- STUDY-24-01686
- Conditions
- Systemic Lupus Erythematosus
- Keywords
- Refractory, Systemic Lupus Erythematosus (SLE), Severe Refractory Systemic Lupus Erythematosus
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 21 participants (estimated)
- Lead sponsor
- Icahn School of Medicine at Mount SinaiUniversity, hospital or other
- Study start
- 17 Mar 2026 (actual)
- Primary completion
- 1 Dec 2027 (estimated)
- Study completion
- 1 Dec 2027 (estimated)
- First posted
- 22 Oct 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will assess the safety and preliminary efficacy of the bi-specific TCE, alnuctamab (known as BMS-986349, CC-93269, EM901), targeting BCMA in patients with moderate to severe SLE, refractory to standard-of-care treatments.
Detailed description
The purpose of this research study is for researchers to learn if the investigational therapy called alnuctamab (known as BMS-986349, CC-93269, EM901) is safe and effective to treat refractory Systemic Lupus Erythematosus (SLE). CC-93269 is investigational, which means its safety and effectiveness have not been established and it is not approved by the U.S. Food and Drug Administration (FDA) for SLE. This will be the first study testing CC-93269 in SLE. Alnuctumab is a type of treatment known as a T cell engager. It is a special protein engineered in the laboratory, which is able to attach to T cells, a type of white blood cell that can kill other cells in the body. T cells normally protect the body from infections, for example by destroying the cells where the virus hides. In this case, alnuctumab will redirect T cells to a new target, called the plasma B cell. This is a type of white blood cell that plays an important role in activating the autoimmune response in patients with lupus. By linking T cells to the autoimmune plasma B cells, alnuctumab will allow the removal of these pathogenic cells. The goal is to evaluate whether this will be sufficient and safe to treat lupus.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Sequential
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Participants with Lupus | Experimental | Drug: AlnuctamabThis study drug will be done by sentinel dosing (study drug given to a small number of participants to watch closely) before all the participants receive the study drug. |
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- Age 18-60 years.
- Documented diagnosis of SLE fulfilling 2019 ACR/EULAR criteria.
- Historical documentation of ANA (1:80 or greater) autoantibody on immunofluorescence as well as presence of at least 1 additional autoantibody of the type: anti-dsDNA, anti-histone, anti-chromatin, anti-Smith, anti-RNP, anti-Ro/SSA, anti-La/SSB, anti-cardiolipin (IgG), or anti-beta2-glycoprotein1 (IgG).
- History of SLE that is refractory to corticosteroids and at least 2 immunosuppressive therapies with different mechanisms of action (methotrexate, thiopurines, mycophenolate mofetil, calcineurin inhibitors, biologic agents, cyclophosphamide), including at least one biologic therapy (e.g. anti-CD20 therapy, anifrolumab, belimumab) or cyclophosphamide. Of note, hydroxychloroquine is not considered an immunosuppressive therapy, and methotrexate/azathioprine counts as a single drug class).
- Total SLEDAI-2K >6 with clinical SLEDAI-2K >4, or >1 BILAG A organ domain score, or >2 BILAG B, but without active central nervous system (CNS) disease within the past year; a maximum of two participants with only arthritis and/or rash can be included if truly disabling
Key exclusion criteria (4 listed)
- Autoimmune disease other than SLE, except associated Sjogren's Disease if not primary contributor to symptoms; coexistent fibromyalgia will be allowed if not primary contributor to symptoms.
- TTP-like SLE; catastrophic APS; LN WHO class V as primary qualifying criterion (unless overlap with Class III or IV), rapidly progressive LN, or eGFR <40 mL/min; active CNS pathology attributable to neuropsychiatric SLE.
- Active or suspected infection, including HIV.
- O2 sat <92% on room air; ANC <1500u/L, Hgb <8g/dL, Plt <75,000/uL; ALT or AST > 2X ULN (unless attributed to active myositis), Total Bilirubin >1.5 X ULN (unless Gilbert's Disease), total B cell count <12/microliter, hypogammaglobinemia <500mg/dL.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| AlnuctamabAlso: EM901The study drug will be given as an injection under the skin. For the first 9 days after the CC-93269 injection, subjects will be staying in the hospital. The goal of this study is to determine the optimal dose of CC-93269 to be safely administered to participants. | Drug | Participants with Lupus |
Primary outcome
Number of treatment emergent AEs
Time frame: 9 days
Type, frequency, and severity of treatment emergent AEs, SAEs, DLTs, and AEs of special interest (e.g., CRS, ICANS)
2 secondary outcomes
Maximum concentration of Alnuctamab
Time frame: 0-29 days
Change in SLE Responder Index (SRI) rate
Time frame: Baseline, Week 24 and Week 52
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Apr 2026.
- Individual participant dataSharing planned: Yes. All of the individual participant data collected during the trial, after de-identification.
Related trials for Systemic Lupus Erythematosus
RecruitingObservational study
Study of Systemic Lupus Erythematosus
Systemic Lupus Erythematosus
RecruitingPhase 2/3
Study of Afimetoran in Adults With Cutaneous Lupus Erythematosus
Cutaneous Lupus Erythematosus (CLE), Systematic Lupus Erythematosus
RecruitingObservational study
Pakistan Arthritis and Connective Tissue Disease Network - Systemic Lupus Erythematosus
SLE - Systemic Lupus Erythematosus
Not yet recruitingPhase 1/2
CD19-Directed CAR-T Cell Therapy in Refractory Systemic Lupus Erythematosus
Lupus Erythematosus, Systemic
RecruitingObservational study
Deciphering the Genetic Architecture of Autoimmune Diseases
Autoimmune Diseases
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Chrisanna Dobrowolski, MD principal investigator
Icahn School of Medicine at Mount Sinai School
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Alnuctamab in people with Systemic Lupus Erythematosus, run by Icahn School of Medicine at Mount Sinai at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 21 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Chrisanna Dobrowolski, MD (212-241-1671, latte@mssm.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Number of treatment emergent AEs (time frame: 9 days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Apr 2026.