Overview

Radioimmunotherapy (211At-OKT10-B10) and Chemotherapy (Melphalan) Before Stem Cell Transplantation for the Treatment of Multiple Myeloma

Status:
Not yet recruiting
Trial end date:
2026-03-01
Target enrollment:
0
Participant gender:
All
Summary
This phase I trial studies the side effects and best dose of 211At-OKT10-B10 when given together with melphalan before a stem cell transplantation in treating patients with multiple myeloma. The radioimmunotherapy drug 211At-OKT10-B10 is a monoclonal antibody, called OKT10-B10, linked to a radioactive substance called 211At. OKT10-B10 attaches to CD38 positive cancer cells in a targeted way and delivers 211At to kill them. Drugs used in chemotherapy, such as melphalan, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving 211At-OKT10-B10 with melphalan before a stem cell transplant may kill more cancer cells.
Phase:
Phase 1
Accepts Healthy Volunteers?
No
Details
Lead Sponsor:
Fred Hutchinson Cancer Research Center
Collaborators:
National Cancer Institute (NCI)
National Institutes of Health (NIH)
Treatments:
Antibodies
Antibodies, Monoclonal
Antineoplastic Agents, Immunological
Daratumumab
Immunoglobulins
Mechlorethamine
Melphalan
Nitrogen Mustard Compounds
Criteria
Inclusion Criteria:

- Patients with a diagnosis of multiple myeloma

- Patients must have autologous hematopoietic stem cells collected with a minimum CD34+
stem cell yield of >= 4 x 10^6 CD34+ cells/kg of body weight

- Subjects must have disease meeting criteria for clinical relapse or progressive
disease (International Myeloma Working Group [IMWG] consensus criteria) and a history
of >= 1 prior autologous stem cell transplant(s)

- Subjects must have received at least 3 prior lines of therapy: an immunomodulatory
drug, a proteasome inhibitor, and a CD38-targeting antibody

* Aline of therapy is defined as one or more cycles of a planned treatment program.
This may consist of one or more planned cycles of a single-agent therapy or
combination therapy, as well as a sequence of treatments administered in a planned
manner. For example, a planned treatment approach of induction therapy followed by
autologous stem cell transplantation, followed by maintenance is considered one line
of therapy. A new line of therapy starts when a planned course of therapy is modified
to include other treatment agents (alone or in combination) as a results of disease
progression, relapse, or toxicity. A new line of therapy also starts when a planned
period of observation off therapy is interrupted by a need for additional treatment
for the disease

- Subjects must have an estimated creatinine clearance greater than 60 ml per minute by
the following formula (Cockcroft-Gault). Serum creatinine value must be within 28 +/-
days prior to registration

- Subjects must have an Eastern Cooperative Oncology Group (ECOG) score =< 2 or
Karnofsky score >= 70%

- Ability to provide informed consent

Exclusion Criteria:

- Subjects with a history of plasma cell leukemia

- History of central nervous system involvement by multiple myeloma

- Prior radioimmunotherapy or radiation of > 20 Gy to pelvis or at maximally tolerated
levels to any critical normal organ

- Prior allogeneic hematopoietic cell transplant

- More than 2 prior autologous hematopoietic cell transplants

- Subjects with medullary or extramedullary plasmacytoma/s measuring > 3 cm by magnetic
resonance imaging (MRI) or positron emission tomography (PET)-computed tomography (CT)
(radiated lesions are exempt from this criterion)

- Subjects with a history of any one of the following cardiovascular conditions within
the past 6 months: Class III or IV heart failure as defined by the New York Heart
Association (NYHA), cardiac angioplasty or stenting, myocardial infarction, unstable
angina, or other clinically significant cardiac disease as determined by the principal
investigator (PI) or designee

- Subjects with corrected QT (QTc) prolongation at baseline

- Subjects with a history of cardiac arrhythmia and a heart rate > 100 beats per minute
(BPM) (oral beta-blocker [excluding sotalol] and/or calcium channel blocker therapy
are acceptable to achieve rate control)

- History of reactive airway disease and clinically significant asthma requiring any
form of medical treatment in the prior three months

- Left ventricular ejection fraction < 40%

- Corrected diffusing capacity of the lungs for carbon monoxide (DLCO) < 50% or
receiving supplemental continuous oxygen

- Liver abnormalities: fulminant liver failure, cirrhosis of the liver with evidence of
portal hypertension, alcoholic hepatitis, esophageal varices, hepatic encephalopathy,
uncorrectable hepatic synthetic dysfunction as evidenced by prolongation of the
prothrombin time, ascites related to portal hypertension, bacterial or fungal liver
abscess, biliary obstruction, chronic viral hepatitis, or symptomatic biliary disease.

- Bilirubin > 2 times the upper limit of normal

- Aspartate aminotransferase [AST] and alanine aminotransferase [ALT] > 2 times the
upper limit of normal

- Subjects who are known to be seropositive for human immunodeficiency virus (HIV)

- Women of childbearing potential who are pregnant (beta-human chorionic gonadotropin
[HCG]+) or breast feeding

- Fertile men and women unwilling to use contraceptives during and for 12 months
post-transplant

- Subjects with untreated and uncontrolled infection at time of enrollment

- Subjects with known amyloid light-chain (AL) subtype amyloidosis

- Known allergy to murine-based monoclonal antibodies

- Known contraindications to radiotherapy

- History of another primary malignancy that has not been in remission for at least 2
years (the following are exempt from the 2-year limit: non-melanoma skin cancer,
curatively treated localized prostate cancer, and cervical carcinoma in situ on biopsy
or a squamous intraepithelial lesion on Papanicolaou [PAP] smear)

- Any anti-CD38 monoclonal antibody within 30 days of anticipated date of infusion of
211At-OKT10-B10

- Individuals with a history of CTCAE grade 4 gastrointestinal toxicity associated with
prior high-dose melphalan conditioning therapy (previous autologous stem cell
transplant)