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Clinical Trial NCT05531565 (AMETHYST) for Subacute Cutaneous Lupus Erythematosus, Chronic Cutaneous Lupus Erythematosus is recruiting. See the Trial Radar Card View and AI discovery tools for all the details. Or ask anything here. | ||
A 2-Part Study to Learn Whether Litifilimab (BIIB059) Injections Can Improve Symptoms of Adult Participants Who Have Active Cutaneous Lupus Erythematosus (AMETHYST) Phase 2, Phase 3 450 Randomized Double-Blind
A 2-Part Seamless Part A (Phase 2)/Part B (Phase 3) Randomized, Double-Blind, Placebo-Controlled, Multicenter Study to Evaluate the Efficacy and Safety of BIIB059 in Participants With Active Subacute Cutaneous Lupus Erythematosus and/or Chronic Cutaneous Lupus Erythematosus With or Without Systemic Manifestations and Refractory and/or Intolerant to Antimalarial Therapy (AMETHYST)
- AMETHYST
- 230LE301
- 2020-000727-40 (EudraCT Number)
- EU CT Number (Other Identifier) (2023-505634-94)
Phase 3
Discoid Lupus Erythematosus (DLE)
Systemic Lupus Erythematosus (SLE)
Lupus
Subacute Cutaneous Lupus Erythematosus (SCLE)
| Participant Group/Arm | Intervention/Treatment |
|---|---|
ExperimentalPart A (Phase 2): Litifilimab Participants will receive litifilimab subcutaneously (SC) once every 4 weeks (Q4W) from Week 0 to Week 20, with an additional dose of litifilimab at Week 2 during the double-blind placebo-controlled (DBPC) treatment period. Following the DBPC treatment period, participants will receive litifilimab during the extended treatment period (ETP) from Week 24 to Week 48, with an additional dose of litifilimab-matching place...Show More | Litifilimab Administered as specified in the treatment arm. |
Placebo ComparatorPart A (Phase 2): Placebo Participants will receive litifilimab-matching placebo SC Q4W from Week 0 to Week 20, with an additional dose of litifilimab-matching placebo at Week 2 during the DBPC treatment period. Following the DBPC treatment period, participants will receive litifilimab during the ETP from Week 24 to Week 48, with an additional dose of litifilimab at Week 26. | Placebo Administered as specified in the treatment arm. |
ExperimentalPart B (Phase 3): Litifilimab Participants will receive litifilimab SC Q4W from Week 0 to Week 20, with an additional dose of litifilimab at Week 2 during the DBPC treatment period. Following the DBPC treatment period, participants will receive litifilimab during the ETP from Week 24 to Week 48, with an additional dose of litifilimab-matching placebo at Week 26. | Litifilimab Administered as specified in the treatment arm. |
Placebo ComparatorPart B (Phase 3): Placebo Participants will receive litifilimab-matching placebo SC Q4W from Week 0 to Week 20, with an additional dose of litifilimab-matching placebo at Week 2 during the DBPC treatment period. Following the DBPC treatment period, participants will receive litifilimab during the ETP from Week 24 to Week 48, with an additional dose of litifilimab at Week 26. | Placebo Administered as specified in the treatment arm. |
| Outcome Measure | Measure Description | Time Frame |
|---|---|---|
Parts A: Percentage of Participants who Achieve a Cutaneous Lupus Activity of Physician's Global Assessment-Revised (CLA-IGA-R) Erythema Score of 0 or 1 | Week 16 | |
Part B: Percentage of Participants who Achieve Cutaneous Lupus Erythematosus Disease Area and Severity Index Activity Score (CLASI-70) Response, Defined as ≥ 70% Decrease in CLASI-A Score From Baseline | Baseline to Week 24 |
| Outcome Measure | Measure Description | Time Frame |
|---|---|---|
Part A: Percentage of Participants With a CLASI-70 Response at Week 52 Among CLASI-70 Responders at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Receive Litifilimab During the DBPC Treatment Period (TP) | Week 52 | |
Part A: Percentage of Participants With CLA-IGA-R Erythema Score of 0 or 1 at Week 52 Among CLA-IGA-R Erythema Responders at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part A: Percentage of Participants With CLA-IGA-R OMC Score of 0 or 1 and at Least 1 Level of Improvement From Baseline at Week 52 Among CLA-IGA-R OMC Responders at Weeks 16 &24, Respectively, who Were Assigned to Receive Litifilimab in DBPC TP | Week 52 | |
Part A: Percentage of Participants With CLA-IGA-R OMC Score of 0 at Week 52 Among CLA-IGA-R OMC Responders With CLA-IGA-R OMC Score of 0 at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Litifilimab During DBPC TP | Week 52 | |
Part A: Percentage of Participants With CLA-IGA-R Follicular Activity Score of 0 at Week 52 Among CLA-IGA-R Follicular Activity Responders at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Receive Litifilimab in DBPC TP | Week 52 | |
Part A: Percentage of Participants With a CLASI-70 Response at Week 52 Among CLASI-70 Nonresponders at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Receive Placebo During the DBPC TP | Week 52 | |
Part A: Percentage of Participants With a CLA-IGA-R Erythema Score of 0 or 1 at Week 52 Among CLA-IGA-R Erythema Nonresponders at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Receive Placebo During the DBPC TP | Week 52 | |
Part A: Percentage of Participants With CLA-IGA-R OMC Score of 0 or 1 and at Least 1 Level of Improvement From Baseline at Week 52 Among CLA-IGA-R OMC Nonresponders at Weeks 16 and 24, Respectively, who Were Assigned to Receive Placebo in DBPC TP | Week 52 | |
Part A: Percentage of Participants With a CLA-IGA-R OMC Score of 0 at Week 52 Among CLA-IGA-R OMC Nonresponders at Week 16 and Week 24, Respectively, who Were Randomly Assigned to Receive Placebo During the DBPC TP | Week 52 | |
Part A: Percentage of Participants who Have CLA-IGA-R Follicular Activity Score of 0 at Week 52 Among CLA-IGA-R Follicular Activity Nonresponders at Weeks 16 and 24, Respectively, who Were Randomly Assigned to Receive Placebo in DBPC TP | Week 52 | |
Part A: Annualized Mild and Moderate SFI Rate and Annualized Severe SFI Rate Through Week 16 | Up to Week 16 | |
Part A: Absolute Change in Cutaneous Lupus Erythematosus Disease Area and Severity Index Damage (CLASI-D) Score at Week 52 | Baseline to Week 52 | |
Part A: Percent Change in CLASI-D Score | Baseline to Week 52 | |
Part B: Percentage of Participants who Achieve a CLASI A score of 0 to 3 | Week 24 | |
Part B: Percentage of Participants who Achieve a CLA-IGA-R OMC Score of 0 or 1 and at Least 2-Point Improvement From Baseline at Week 24, for Participants who had CLA-IGA-R OMC Score ≥ 2 at Baseline | Week 24 | |
Part B: Percentage of Participants who Achieve a CLA-IGA-R Erythema Score of 0 or 1, at Week 16 and Week 24, Respectively, for Participants in Full Analysis Set (FAS), who had CLA-IGA-R Erythema Score ≥3 and Other OMC Score ≥3 at Baseline | Weeks 16 and 24 | |
Part B: Percentage of Participants who Achieve a CLA-IGA-R OMC Score of 0 or 1, at Week 16 and Week 24, Respectively, for Participants in FAS, who had CLA-IGA-R Erythema Score ≥3 and OMC Score ≥3 at Baseline | Weeks 16 and 24 | |
Part B: Percentage of Participants who Achieve CLA IGA R Erythema Score of 0 or 1 | Up to Week 24 | |
Part B: Percentage of Participants who Achieve at Least 1 Level of Improvement From Baseline in the CLA-IGA-R Erythema Score | Up to Week 24 | |
Part B: Percentage of Participants who Achieve a CLASI-A Score of 0 to 5 | Up to Week 24 | |
Part B: Percentage of Participants who Achieve a CLASI-50a Response, Defined as a ≥ 50% Decrease in Baseline CLASI-A Score in Addition to Achieving Mild Disease Severity With a CLASI-A Score <10 at Week 16 and Week 24, Respectively | Weeks 16 and 24 | |
Part B: Percentage of Participants With a CLASI 70 Response at Week 52 Among CLASI-70 Responders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLASI 50 Response at Week 52 Among CLASI-50 Responders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLASI A 0 to 3 Response at Week 52 Among CLASI-A 0 to 3 Responders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLA IGA R Erythema Score of 0 or 1 at Week 52 Among CLA-IGA-R Erythema Responders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLA IGA R OMC score of 0 at Week 52 Among CLA IGA R OMC Responders With a CLA-IGA-R OMC Score of 0 at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLA IGA-R Follicular Activity Score of 0 at Week 52 Among CLA-IGA-R Follicular Activity Responders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLASI 70 Response at Week 52 Among CLASI-70 Nonresponders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLASI 50 Response at Week 52 Among CLASI-50 Nonresponders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLASI A 0 to 3 Response at Week 52 Among CLASI-A 0 to 3 Nonresponders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLA IGA R Erythema Score of 0 or 1 at Week 52 Among CLA-IGA-R Erythema Nonresponders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLA IGA R OMC score of 0 at Week 52 Among CLA IGA R OMC Nonresponders With a CLA-IGA-R OMC Score of 0 at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Percentage of Participants With a CLA IGA-R Follicular Activity Score of 0 at Week 52 Among CLA-IGA-R Follicular Activity Nonresponders at Week 24, who Were Randomly Assigned to Receive Litifilimab During the DBPC TP | Week 52 | |
Part B: Absolute Change in CLASI-D Score | Week 52 | |
Part B: Percent Change in CLASI-D Score | Week 52 | |
Part B: Change From Baseline in Cutaneous Lupus Erythematosus-Quality of Life (CLE-QoL) Score | Part B: Weeks 16, 24 and 52 | |
Part B: Change From Baseline in Dermatology Life Quality Index (DLQI) Score | Part B: Weeks 16, 24 and 52 | |
Part B: Change From Baseline in Numerical Rating Scale (NRS) for Pain in Skin Rash | Part B: Weeks 16, 24 and 52 | |
Part B: Change From Baseline in NRS for Itch in Skin Rash | Part B: Weeks 16, 24 and 52 | |
Parts A and B: Percentage of Participants who Achieve a CLA-IGA-R Erythema Score of 0 or 1 | Part A: Week 24; Part B: Weeks 16 and 24 | |
Parts A and B: Percentage of Participants who Achieve a CLA-IGA-R Other Morphologic Characteristics (OMC) Score of 0 or 1 and at Least 1 Level of Improvement From Baseline | Part A: Weeks 16 and 24; Part B: Up to Week 24 | |
Parts A and B: Percentage of Participants who Achieve a CLA-IGA-R OMC Score of 0 | Part A: Weeks 16 and 24; Part B: Up to Week 24 | |
Parts A and B: Percentage of Participants With at Least 1 Level of Improvement From Baseline in CLA-IGA-R OMC Score | Part A: Weeks 16 and 24; Part B: Up to Week 24 | |
Parts A and B: Percentage of Participants who Have a CLA-IGA-R Follicular Activity Score of 0 | Part A: Weeks 16 and 24; Part B: Up to Week 24 | |
Parts A and B: Percentage of Participants who Achieve a CLASI-70 Response, Defined as a ≥ 70% Decrease in CLASI-A Score From Baseline | Parts A: Weeks 16 and 24; Part B: Week 12 | |
Parts A and B: Percentage of Participants who Achieve a CLASI-50 Response, Defined as a ≥ 50% Decrease in CLASI-A Score From Baseline | Part A: Weeks 16 and 24; Part B: Weeks 12 and 24 | |
Parts A and B: Percentage of Participants who Achieve a CLASI-A Score of 0 or 1 | Up to Week 24 | |
Parts A and B: Percentage of Participants who Achieve a CLASI-A Score of 0 to 3 | Up to Week 24 | |
Parts A and B: Percentage of Participants who Achieve a CLASI 70 Response | Up to Week 24 | |
Parts A and B: Percentage of Participants who Achieve a CLASI 50 Response | Up to Week 24 | |
Parts A and B: Percentage of Participants who Achieve a 7-Point Reduction From Baseline in CLASI-A Score | Up to Week 24 | |
Parts A and B: Annualized Mild and Moderate Safety of Estrogens in Lupus Erythematosus National Assessment-SLE Disease Activity Index Flare Index Rate and Annualized Severe SFI Rate Through Week 24 | Up to Week 24 | |
Parts A and B: Annualized Mild and Moderate SFI Rate and Annualized Severe SFI Rate Through Week 52 | Up to Week 52 | |
Parts A and B: Number of Participants Experiencing Treatment Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs) | Up to Week 76 | |
Parts A and B: Number of Participants With Anti-Litifilimab Antibodies in Serum During the Study | Up to Week 76 |
- Histologically confirmed (in the past or during the Screening period) diagnosis of CLE with or without systemic manifestations.
- Must have active cutaneous manifestations that meet study criteria.
- Must have a CLASI-A score ≥10.
- Must have an active CLE lesion despite an adequate trial of antimalarial treatment.
- Any active skin conditions other than CLE that may interfere with the study assessments of CLE.
- Diagnosis of mixed connective tissue disease \[(within 1 year of signing the informed consent form (ICF)\] or any history of overlap syndromes of SLE including concomitant presence with rheumatoid arthritis, dermatomyositis and/or polymyositis, systemic sclerosis, psoriatic arthritis, or any other autoimmune disease that may confound the evaluation of the disease activity or the effect of the investigational product. Exceptions for overlap syndrome of SLE include participants with overlap syndrome of SLE with myositis and secondary Sjögren's syndrome at screening is permitted provided the participant also meets the criteria for classification as SLE. A past history of mixed connective tissue disease that over time has developed into a diagnosis of SLE is permitted, provided diagnosis of SLE has been present for at least 1 year.
- Active severe lupus nephritis.
- Active neuropsychiatric SLE.
- Use of intralesional corticosteroids within 1 week prior to Screening and during the study.
- Use of immunosuppressive or disease-modifying treatments for SLE or CLE \[via an oral, intravenous (IV), or SC route\] that were initiated less than 12 weeks prior to screening, have not been at a stable and allowable dose.
NOTE: Other protocol-defined Inclusion/Exclusion criteria may apply
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