ClinicalTrials.gg
TerminatedNCT03266692Updated Mar 30, 2020

Study of ACTR087 in Combination With SEA-BCMA in Subjects With Relapsed or Refractory Multiple Myeloma

A Phase 1 interventional study of ACTR087 and SEA-BCMA in Multiple Myeloma, Multiple Myeloma in Relapse and Refractory Multiple Myeloma, sponsored by Cogent Biosciences, Inc.. Terminated at 7 sites in United States. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2020-03-30.

Sponsored by Cogent Biosciences, Inc. · Phase 1, Interventional, and Treatment

Why this study was terminated
Business reasons

From the registry’s dates

  • Primary completion was Oct 2019, 7 years 1 month ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
15
Allocation
Not applicable
Ages
18 Years to 80 Years
Sex
All
01

Study summary

This is a phase 1, multi-center, single-arm, open-label study evaluating the safety, tolerability, and anti-myeloma activity of ACTR087 (an autologous T cell product) in combination with SEA-BCMA (a monoclonal antibody) in subjects with relapsed or refractory Multiple Myeloma.

02

Conditions studied

  • Multiple Myeloma
  • Multiple Myeloma in Relapse
  • Refractory Multiple Myeloma

Keywords

  • BCMA
  • SEA-BCMA
  • B Cell Maturation Antigen
  • ACTR
  • ACTR087
  • T cell
  • T cell product
  • relapsed
  • refractory
  • multiple myeloma
  • adoptive T cells
  • autologous
  • gene therapy
  • cell therapy
03

In context

Multiple Myeloma

3,760 studies on the registry are indexed under Multiple Myeloma; 769 are open to participants now.

This study's enrollment of 15 is below the median of 41 across 3,005 interventional studies indexed under Multiple Myeloma.

Browse Multiple Myeloma studies →

Lead sponsor

Cogent Biosciences, Inc. is the lead sponsor of 14 studies on the registry; 6 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Signed written obtained prior to study procedures
  • - or cytologically-confirmed multiple myeloma (MM) with
  • Must have received at least 3 to include treatment with a proteasome inhibitor (eg, bortezomib, carfilzomib, or ixazomib) and an immunomodulatory agent (eg, lenalidomide, pomalidomide) unless double-refractory to both; and a hematopoietic stem cell transplant (), for those subjects considered HSCT-eligible.
  • Quantitative serum IgG levels for subjects with IgG MM must not exceed the institutional (ULN)
  • 0 or 1
  • of at least 6 months
  • Absolute neutrophil (ANC) count greater than 1000/ µL
  • count greater than 50,000/µL
  • Estimated >30mL/min/1.73m2

Exclusion criteria

Exclusion Criteria:

  • Known active central nervous system (CNS) involvement by MM
  • Systemic rheumatic or diseases or acute or chronic infections
  • Uncontrolled thromboembolic events or recent severe hemorrhage
  • Subjects who are currently using more than 5mg/day of prednisone (or an equivalent exceeding physiologic replacement levels)
  • Prior treatment as follows:

    • T cell-directed antibody therapy (eg. Alemtuzumab, anti-thymocyte globulin) within 6 months of enrollment
    • Any prior myeloma-directed therapy including cytotoxic chemotherapy, biologic therapy, or radiotherapy within 2 weeks of enrollment
    • Any mAb or other protein therapeutic containing Fc-domains within 4 weeks of enrollment
    • Experimental agents within 3 half-lives prior to enrollment, unless progression is documented on therapy
    • Prior BCMA-directed agents at any time
    • Prior cell or gene therapy, excluding transfers of genetically unmodified autologous cells (eg. Hematopoietic stem cell transplantation), at any time; or prior HSCT at any time
  • Pregnant or breastfeeding
Terms in these criteria, in plain language(14)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
15 participants (actual)

Study arms

  • Experimental
    ACTR087 in combination with SEA-BCMA

    Biological: ACTR087 · Biological: SEA-BCMA

Interventions

  • BiologicalACTR087

    Autologous T cell product

  • BiologicalSEA-BCMA

    B-cell maturation antigen (BCMA)-directed antibody

06

What researchers measure

Primary outcomes

  1. Safety and tolerability of ACTR087 in combination with SEA-BCMA

    Composite outcome measure assessed by committee review of dose limiting toxicities (DLTs), incidence and severity of AEs and clinically significant abnormalities of laboratory values

    Time frame: 28 days

  2. Determination of recommended Phase 2 dosing regimen

    Review of DLTs, Maximum tolerated contour (MTC), incidence and severity of AEs and clinically significant abnormalities of laboratory values

    Time frame: 52 weeks

Secondary outcomes

  1. Safety of SEA-BCMA as measured by incidence of Treatment Emergent Adverse Events (TEAEs)

    Review of all TEAEs, including incidence and severity of AEs, DLTs and clinically significant abnormalities of laboratory values

    Time frame: 21 days

  2. Anti-myeloma activity as measured by overall response rate (per IMWG response criteria)

    Time frame: 52 weeks

  3. Anti-myeloma activity as measured by duration of response

    Time frame: 52 weeks

  4. Anti-myeloma activity as measured by progression-free survival

    Time frame: 52 weeks

  5. Anti-myeloma activity as measured by overall survival

    Time frame: 52 weeks

  6. Assessment of persistence of ACTR087 as measured by flow cytometry and qPCR

    Time frame: 52 weeks

  7. Assessment of ACTR087 phenotype and function as measured by flow cytometry

    Time frame: 52 weeks

  8. Assessment of induction of inflammatory markers and cytokines/chemokines after ACTR087 administration

    Levels of inflammatory markers, cytokines/chemokines

    Time frame: 52 weeks

  9. SEA-BCMA PK

    SEA-BCMA plasma concentration

    Time frame: 52 weeks

  10. Assessment of anti-drug antibodies (ADA) after SEA-BCMA administration

    Incidence of ADAs to SEA-BCMA

    Time frame: 52 weeks

07

Study locations

7 sites
  • Mayo Clinic
    Phoenix, Arizona 85054, United States
  • Mayo Clinic
    Jacksonville, Florida 32224, United States
  • Indiana Blood and Marrow Transplantation
    Indianapolis, Indiana 46327, United States
  • Tufts Medical Center
    Boston, Massachusetts 02111, United States
  • Ohio State University Wexner Medical Center
    Columbus, Ohio 43210, United States
  • Baylor Scott & White
    Dallas, Texas 75246, United States
  • Medical College of Wisconsin
    Milwaukee, Wisconsin 53226, United States
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Feb 2018 to primary completion in Oct 2019, 19 months.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 22, 2017
First posted
Aug 30, 2017
StartActual
Feb 22, 2018
Primary completionActual
Oct 1, 2019
CompletionActual
Oct 1, 2019
Last update
Mar 30, 2020
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 30, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT03266692
Lead sponsor
Cogent Biosciences, Inc.
Collaborators
Seagen Inc.
Responsible party
Sponsor
First posted
Aug 30, 2017
Start date
Feb 22, 2018
Primary completion
Oct 1, 2019
Completion
Oct 1, 2019
Last update
Mar 30, 2020

Study contacts

Jessica Sachs, MD
study director · Cogent Biosciences, Inc.

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Mar 2020. You cannot join it, but the record below documents what was studied.

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