Adults 18 to 99, any sex, with Multiple Myeloma. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Progression-free SurvivalPrimary· Randomization until disease progression or death, which ever occured first (maximum up to 5 years)
Progression-free survival was defined as the time interval between randomization and the first documented sign of disease progression (including relapse from complete response \[CR\]) by the European Bone Marrow Transplant (EBMT) criteria or death, whichever occurred first. Relapse from CR requires at least 1 of the following: Reappearance of serum or urinary M-protein on immunofixation or routine electrophoresis, confirmed by at least 1 further investigation and excluding oligoclonal immune reconstitution; Greater than or equal to (\>=) 5 percent (%) plasma cells either in a bone marrow aspir
Group
Value
95% CI
Part 2 - Bortezomib + Placebo
232
191 – 302
Part 2 - Bortezomib + Siltuximab
245
217 – 300
Percentage of Participants With Best Confirmed Response of Complete Response (CR) or Partial Response (PR) (Overall Response Rate)Secondary· Randomization until disease progression (maximum up to 5 years)
Overall response rate was defined as best response (CR/PR confirmed) for a participant recorded from first administration of study agent or randomization (Part 2) until disease progression/recurrence and before dexamethasone was added. CR: Absence of original M-protein in serum/urine by immunofixation,maintained for minimum of 6 weeks. The presence of oligoclonal bands consistent with oligoclonal immune reconstitution does not exclude CR; Less than 5 percent (%) plasma cells in bone marrow aspirate and also on trephine bone biopsy if biopsy is performed; No increase in size/number of lytic bon
Group
Value
95% CI
Part 2 - Bortezomib + Placebo
46.7
Part 2 - Bortezomib + Siltuximab
55.0
Percentage of Participants With Confirmed Complete Response (CR Rate)Secondary· Randomization until disease progression (maximum up to 5 years)
CR rate was defined as the percentage of participants who achieved a confirmed CR before dexamethasone was added. CR: Absence of original M-protein in serum/urine by immunofixation,maintained for minimum of 6 weeks. The presence of oligoclonal bands consistent with oligoclonal immune reconstitution does not exclude CR; Less than 5 percent (%) plasma cells in bone marrow aspirate and also on trephine bone biopsy if biopsy is performed; No increase in size/number of lytic bone lesions; Disappearance of soft tissue plasmacytomas.
Group
Value
95% CI
Part 2 - Bortezomib + Placebo
7.3
Part 2 - Bortezomib + Siltuximab
10.7
Overall SurvivalSecondary· up to 5 years
Overall survival was defined as the interval between the first administration of study agent or randomization (Part 2) and the participant's death from any cause. For participants with unknown survival status as of the data cut-off date, overall survival was censored at the last date known to be alive.
Group
Value
95% CI
Part 2 - Bortezomib + Placebo
1121
1038.0 – NA
Part 2 - Bortezomib + Siltuximab
937
713 – 1127
Number of Participants With Adverse Events (AEs) or Serious Adverse Events (SAEs)Primary· up to 5 years
An AE is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; lifethreatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly.
Adverse Events (AEs)
Group
Value
95% CI
Part 1 - Bortezomib + Siltuximab
21
Part 2 - Bortezomib + Placebo
138
Part 2 - Bortezomib + Siltuximab
140
Serious Adverse Events (SAEs)
Group
Value
95% CI
Part 1 - Bortezomib + Siltuximab
10
Part 2 - Bortezomib + Placebo
44
Part 2 - Bortezomib + Siltuximab
47
Adverse events — posted to ClinicalTrials.gov
Reporting threshold: 5%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Part 1 - Bortezomib + Siltuximab
Serious: 10/21 (48%)
Deaths: —
Part 2 - Bortezomib + Placebo
Serious: 44/139 (32%)
Deaths: —
Part 2 - Bortezomib + Siltuximab
Serious: 47/142 (33%)
Deaths: —
Serious adverse events (122 terms)
Reaction
System
Part 1 - Bortezomib + Silt…
Part 2 - Bortezomib + Plac…
Part 2 - Bortezomib + Silt…
Pneumonia
Infections and infestations
—
—
—
Sepsis
Infections and infestations
—
—
—
Anaemia
Blood and lymphatic system disorders
—
—
—
Bronchopneumonia
Infections and infestations
—
—
—
Renal Failure Acute
Renal and urinary disorders
—
—
—
Pulmonary Oedema
Respiratory, thoracic and mediastinal disorders
—
—
—
Febrile Neutropenia
Blood and lymphatic system disorders
—
—
—
Thrombocytopenia
Blood and lymphatic system disorders
—
—
—
Gastrointestinal Haemorrhage
Gastrointestinal disorders
—
—
—
Sudden Death
General disorders
—
—
—
Acute Hepatitis B
Infections and infestations
—
—
—
Erysipelas
Infections and infestations
—
—
—
Lobar Pneumonia
Infections and infestations
—
—
—
Upper Respiratory Tract Infection
Infections and infestations
—
—
—
Basal Cell Carcinoma
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
The purpose of Part 1 of the study is to determine the safety of the combination of Siltuximab (CNTO 328) and bortezomib (Velcade). The purpose of Part 2 of the study is to compare the length of progression free survival for those patients given CNTO 328 and bortezomib to those patients given bortezomib alone.
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
NCT06990711 — A Phase 1 Clinical Trial of Siltuximab for the Treatment of Antibody-Mediated Rejection After Lung Transplantation
· Phase 1
· recruiting
NCT07106671 — A Phase II Study of Siltuximab for CRS/ICANs After CAR-T in Multiple Myeloma
· Phase 2
· recruiting
NCT06447376 — Study of Cytokine Release Syndrome Prophylaxis and Treatment With Siltuximab Prior to Epcoritamab
· Phase 1
· recruiting
NCT06352866 — Siltuximab for Cytokine Release Syndrome Prophylaxis Prior to tx w/ Teclistamab in RRMM
· Phase 2
· withdrawn
NCT06470971 — Siltuximab for the Prevention of Severe Immune-Related Adverse Events During Immune Checkpoint Inhibitor Rechallenge in
· Phase 2
· recruiting
Other recruiting trials for Multiple Myeloma
Currently open trials in the same condition.
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· recruiting
NCT07454382 — A Study of Elranatamab and Cyclophosphamide in People With Multiple Myeloma
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· recruiting
NCT07266441 — A Study of JNJ-79635322 in Participants With Relapsed or Refractory Multiple Myeloma
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· recruiting
NCT07258511 — A Study Comparing JNJ-79635322 and an Anti-B-cell Maturation Antigen (BCMA)xCD3 Bispecific Antibody in Participants With
· Phase 3
· recruiting
Other Janssen Research & Development, LLC trials
Trials by the same sponsor.
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· Phase 3
· not yet recruiting
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· recruiting
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· not yet recruiting
NCT07438496 — A Study of Nipocalimab in Adults With Moderate to Severe Systemic Lupus Erythematosus
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NCT07227025 — A Study of Amivantamab and Olomorasib Combination Therapy in Participants With Metastatic Non-Small Cell Lung Cancer
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Janssen Research & Development, LLC
Last refreshed: 19 November 2019
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT00401843.