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Relapsed and/or Refractory Multiple MyelomaPhase 1AMG420NCT03836053

Assessment of AMG 420 in Subjects With Relapsed and/or Refractory Multiple Myeloma

A Phase 1 study testing AMG 420 in people with Relapsed and/or Refractory Multiple Myeloma, run by Amgen at 10 sites in 5 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

To confirm the maximum tolerated dose (MTD) from the BI 836909 trial of 400 mcg/d, given as 28-day continuous intravenous infusion in patients with relapsed and/or refractory multiple myeloma, to test the 600 mcg/d dose, given as a 28-day continuous iV infusion. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
AMG 420
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
23 participants
Where
10 sitesin 5 countries
Study dates
4 Mar 2019to 21 Apr 2022
Phase
Phase 1
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Subject has provided informed consent prior to initiation of any study specific activities/procedures
  • Multiple myeloma meeting the following criteria:
  • Pathologically-documented diagnosis of multiple myeloma that is relapsed or is refractory as defined by the following: Relapsed after 3 or more lines of prior therapy that must include a proteasome inhibitors (PI), an immunomodulators (IMiD), and a CD38-directed monoclonal antibody in any order during the course of treatment OR refractory to a PI, IMiD, and CD38-directed monoclonal antibody.
  • -Measurable disease, defined by 1 or more of the following at time of screening: 1) serum M-protein > 0.5 g/dL measured by serum protein electrophoresis (SPEP); 2) urinary M-protein excretion > 200 mg/24 hours; 3) Involved serum free light chain (sFLC ) measurement > 10 mg/dL, provided that the sFLC ratio is abnormal (<0.26 or >1.65) as per IMWG response criteria
  • . ECOG performance status of less than or equal to 2
  • Life expectancy of at least 3 months per PI judgement at screening
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  • Hematological function without transfusion support (within 7 days from screening assessment) as follows:
  • ANC ≥ 1.0 x 10^9/L (without growth factor support)
  • platelet count ≥ 25 x 10^9/L (without transfusions)
  • hemoglobin ≥ 7.0 g/dL (transfusions permitted no later than 48 hours before screening)
  • Renal function as follows: calculated or measured creatinine clearance ≥30 mL/min using the Cockcroft-Gault equation or via 24-hour urine collection with plasma and urine creatinine concentrations, respectively
  • Hepatic function as follows: AST and ALT < 3x upper limit of normal (ULN); TBIL <1.5 x ULN (unless considered due to Gilbert's syndrome)

Who cannot join

  • Known central nervous system involvement by multiple myeloma
  • Evidence of primary or secondary plasma cell leukemia at the time of screening
  • Waldenstrom's macroglobulinemia
  • Unresolved toxicities from prior anticancer therapy, defined as not having resolved to CTCAE version 5.0 grade 1 or to levels dictated in the eligibility criteria with the exception of grade 2 peripheral neuropathy, alopecia, or toxicities from prior anticancer therapy that are considered irreversible (defined as having been present and stable for > 4 weeks) which may be allowed if they are not otherwise described in the exclusion criteria and there is agreement to allow by the PI and Amgen medical monitor
  • History of other malignancy within the past 3 years, with the following exceptions: 1. malignancy treated with curative intent and with no known active disease present for ≥ 1 year before enrollment and felt to be at low risk for recurrence by the treating physician; 2. adequately-treated non-melanoma skin cancer or lentigo maligna without evidence of disease; 3. adequately-treated cervical carcinoma in situ without evidence of disease; 4. breast ductal carcinoma in situ with full surgical resection (ie, negative margins) and without evidence of disease; 5. prostate cancer with a Gleason score < 6 with undetectable PSA over 12 months; 6. treated medullary or papillary thyroid cancer; 7. adequately-treated urothelial papillary noninvasive carcinoma or carcinoma in situ; similar neoplastic conditions with an expectation of > 95% five-year disease-free survival; 8. see exclusion criterion # 2 for exclusion of subjects with evidence of primary or secondary plasma cell leukemia at the time of screening
  • Known history of amyloidosis
Show all 24Show fewer
  • Current or known history of autoimmune diseases requiring systemic treatment in past 5 years except vitiligo, resolved childhood asthma/atopy, or subjects with history of hypothyroidism after completing treatment for autoimmune thyroid disease, stable on hormone replacement therapy.
  • Clinically not-controlled chronic or ongoing infectious disease requiring treatment at the time of study day 1 or within the 14 days before study day 1
  • Symptomatic peripheral sensory or motor neuropathy of grade ≥3
  • History or presence of clinically relevant central nervous system (CNS) pathology as uncontrolled epilepsy or seizure disorder, paresis, aphasia, stroke, severe brain injuries, dementia, Parkinson's disease, cerebellar disease, organic brain syndrome, and psychosis
  • Active hepatitis B and C based on the following results: a) Positive for HepBsAg; b) Negative HepBsAg and positive for hepatitis B core antibody; c) Positive Hepatitis C virus antibody (HepCAb)
  • Known or suspected HIV infection or subjects who are HIV seropositive
  • Baseline ECG QTc > 470 msec (applying Fridericia correction)
  • Previously received an allogeneic stem cell transplant and the occurrence of 1 or more of the following: a) received the transplant within 6 months prior to study day 1; b) received immunosuppressive therapy within the last 3 months prior to study day 1; c) any active acute graft versus host disease (GvHD), grade 2 to 4, according to the Glucksberg criteria or active chronic GvHD requiring systemic treatment; d) any systemic therapy against GvHD within 2 weeks prior to start of investigational product treatment
  • Autologous stem cell transplantation < 90 days prior to study day 1
  • Treatment with systemic immune modulators including, but not limited to, nontopical systemic corticosteroids (unless the dose is ≤ 10 mg/day prednisone or equivalent), cyclosporine, and tacrolimus within 2 weeks before study day 1
  • Last anticancer treatment < 2 weeks prior to study day 1
  • Last treatment with a therapeutic antibody less than 4 weeks prior to study day 1
  • Systemic radiation therapy within 28 days prior to study day 1. Focal radiotherapy within 14 days prior to study day 1.
  • Major surgery defined as surgery requiring general anesthesia with endotracheal intubation within 28 days prior to study day 1, unless discussed with and eligibility approved by Amgen medical monitor
  • Prior treatment with any drug that specifically targets BCMA on tumor cells (eg, other bi-specific antibody constructs, antibody drug conjugates, or CAR T-cells, except for subjects who were previously treated with AMG 420 in this study and who are candidates for second-course treatment
  • Treatment with medications known to cause QTc interval prolongation within the washout periods described in Section 12.10 unless approved by the Amgen medical monitor
  • Currently receiving treatment in another investigational device or drug study, or less than 30 days since ending treatment on another investigational device or drug study(ies). Other investigational procedures while participating in this study are excluded.
  • History or evidence of any other clinically-significant disorder, condition, or disease (eg, symptomatic congestive heart failure, unstable angina pectoris,cardiac arrhythmia requiring therapy at time of screening) with the exception of those outlined above that, in the opinion of the investigator or Amgen medical monitor, if consulted, would pose a risk to subject safety or interfere with the study evaluation, procedures, or completion.

Trial locations and contacts

10 sites in 5 countries.

10 sites in 5 countries

United States4 sites
  • Massachusetts General Hospital

    Boston, Massachusetts, 02114

  • Memorial Sloan Kettering Cancer Center

    New York, New York, 10021

  • Advocate Lutheran General Hospital

    Park Ridge, Illinois, 60068

  • Wake Forest Baptist Health

    Winston-Salem, North Carolina, 27157

Other trials in United States

Australia2 sites
  • St Vincents Hospital Sydney

    Darlinghurst, New South Wales, 2010

  • St Vincents Hospital Melbourne

    Fitzroy, VIC, Victoria, 3065

Other trials in Australia

Belgium2 sites
  • Centres Hospitaliers Jolimont - Hopital de Jolimont

    Haine Saint Paul - La Louviere, 7100

  • Centre Hospitalier Universitaire Dinant Godinne - Universite Catholique de Louvain Namur

    Yvoir, 5530

Other trials in Belgium

Japan1 site
  • National Hospital Organization Okayama Medical Center

    Okayama, Okayama-ken, 701-1192

Other trials in Japan

Switzerland1 site
  • Kantonsspital St Gallen

    Sankt Gallen, 9007

Other trials in Switzerland

About this study

Official title: A Phase 1b Multicenter, Open-label, Expansion Study to Assess the Safety and Efficacy of AMG 420 as Monotherapy in Subjects With Relapsed and/or Refractory Multiple Myeloma

To confirm the maximum tolerated dose (MTD) from the BI 836909 trial of 400 mcg/d, given as 28-day continuous intravenous infusion in patients with relapsed and/or refractory multiple myeloma, to test the 600 mcg/d dose, given as a 28-day continuous iV infusion.

Read the detailed description

Cohort 1 will consist of 10 subjects dosed at 400 mcg/d. Cohort 2 will consist of 10 subjects dosed at 600 mcg/d. All doses will be given as a 28-day continuous IV infusion, followed by a 2 week treatment-free interval, until subject experiences disease progression as per International Myeloma Working Group (IMWG) criteria.

Being tested
AMG 420

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • AMG 420Drug

    28 day continuous Intravenous infusion of either 400 mcg/d or 600 mcg/d followed by 2 treatment free weeks

Study groups in NCT03836053
Study groupRoleWhat they receive
AMG 420ExperimentalSingle Arm Design
Receives: Drug: AMG 420

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants With Dose-limiting Toxicities (DLTs)

    DLTs were graded using Common Terminology Criteria for Adverse Events (CTCAE) v5.0, with the exception of cytokine release syndrome (CRS) and tumor lysis syndrome (TLS), which graded using the criteria referenced in the publication by Lee et al, 2014 and the Cairo Bishop criteria referenced in the publication by Coiffier et al, 2008 respectively.

    A participant was non-DLT evaluable if they dropped out before completion of the DLT-evaluable period for reasons other than a DLT.

    Measured: Day 1 to Week 4

  2. Number of Participants Who Experienced a Treatment-emergent Adverse Event (TEAE)

    The severity of TEAEs were graded using the CTCAE version 5.0 with the exception of CRS and TLS, which graded using the criteria referenced in the publication by Lee et al, 2014 and the Cairo Bishop criteria referenced in the publication by Coiffier et al, 2008. Any clinically significant changes in vital signs, electrocardiograms (ECGs) and clinical laboratory tests were recorded as TEAEs.

    Measured: Up to approximately 3 years

  3. Number of Participants Who Experienced a Treatment-related TEAE

    The severity of treatment-related TEAEs were graded using the CTCAE version 5.0 with the exception of CRS and TLS, which graded using the criteria referenced in the publication by Lee et al, 2014 and the Cairo Bishop criteria referenced in the publication by Coiffier et al, 2008.

    Treatment-related TEAEs were those that were considered related to the study treatment by the investigator.

    Measured: Up to approximately 3 years

Secondary outcomes (4)
  1. Overall Response Rate (ORR)

    ORR was defined as the percentage of participants for whom the best overall response was a stringent complete response (CR), CR, very good partial response (PR), or partial response as determined by the IMWG Uniform Response Criteria. The ORR along with the associated 95% exact binomial confidence interval (Clopper Pearson Method) was determined.

    Measured: Up to approximately 3 years

  2. Duration of Response (DOR)

    DOR was defined as number of months between first objective response to progressive disease or death (due to any cause), whichever occurred first.

    Kaplan-Meier methods were used to estimate the distribution of DOR. The median and corresponding two-sided 95% confidence intervals were calculated.

    Measured: Up to approximately 3 years

  3. Percentage of Participants With Minimal Residual Disease (MRD) Negativity Response at CR

    MRD negativity at CR or better assessed by using the IMWG criteria.

    Percentage of MRD negative responders at CR along with exact 2- sided 95% were provided by using the Clopper Pearson method.

    Measured: Up to approximately 3 years

  4. Number of Participants With Minimal Residual Disease (MRD) Negativity Response at CR

    Number of participants with MRD negativity at CR or better assessed by using the IMWG criteria.

    Measured: Up to approximately 3 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Feb 2019
  2. Study start4 Mar 2019
  3. Primary completion21 Apr 2022
  4. Study completion21 Apr 2022

Why it stopped: Amgen re-evaluated the portfolio and decided to discontinue clinical development activities for AMG 420.

Resources

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
Single group
Model description
Phase 1b Primary objective Establish the safety and tolerability of AMG 420 at dose levels of 400 mcg/day and 600 mcg/day in subjects with relapsed and/or refractory multiple myeloma (RRMM) Phase 1b Key Secondary/Secondary objectives: Estimate overall response rate (ORR) and duration of response (DOR) Evaluate the rate of minimal residual disease (MRD)-negativity at the time of CR Establish the safety and tolerability of AMG 420 in subjects with extramedullary relapsed MM Characterize the PK of AMG 420 when administered as 4-week continuous IV infusion Evaluate other measures of anti-myeloma activity of AMG 420: Time to response, PFS, OS, TFI, BOR
Masking
None (open label)
Enrolment
23 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03836053
Sponsor's protocol ID
20160370
Other IDs
2018-002879-17, 2018
Acronym
AMG420
Status last verified
Aug 2025
First submitted
5 Feb 2019
Last updated
11 Sep 2025
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request

Publications

  • Rodriguez C, Rodriguez T, Kentos A, Driessen C, Sunami K, Lesokhin AM, Yee AJ, Minella AC, Maraboina R, Upreti VV, Zhou D, Shabooti M, Stieglmaier J, Quach H. BCMA-targeting BiTE molecule AMG 420 in relapsed or refractory multiple myeloma: a phase 1b open-label expansion study. Leuk Lymphoma. 2025 Nov;66(11):2108-2117. doi: 10.1080/10428194.2025.2528115. Epub 2025 Jul 21.

    PubMed 40690374

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing AMG 420 in people with Relapsed and/or Refractory Multiple Myeloma, run by Amgen at 10 sites in 5 countries.

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 12 inclusion and 24 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: stopped early, as of the sponsor's last update on 11 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 10 sites in United States, Australia, Belgium, Japan, Switzerland. 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?

Yes. Results are posted in the registry (first posted 5 Jan 2024). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With Dose-limiting Toxicities (DLTs) (time frame: Day 1 to Week 4). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03836053, which also lists 1 linked publication.

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 11 Sep 2025.

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