Lymphodepleting Total Body Irradiation (TBI) Plus Cyclophosphamide Prior to Ciltacabtagene Autoleucel (Carvykti; Cilta-cel) for Multiple Myeloma (MM) Patients With Impaired Renal Function

NCT06623630 | Recruiting Phase 1 DMC FDA Drug FDA Device

• 1 other identifier: 202410010
• Study Type: interventional
• Target: 16
• Locations: 1 country
• Sites: 1

Brief Summary

Treatment for relapsed/refractory multiple myeloma continues to evolve with the approval of highly effective anti-BCMA CAR T therapies in recent years. However, despite the high prevalence of renal insufficiency in this population, pivotal clinical trials have excluded patients with impaired renal function, leading to an urgent, unmet clinical need to develop safe and effective lymphodepleting regimens prior to CAR T administration for this population. In addition, renal insufficiency is linked to poor disease-related outcomes and is highly associated with several underserved populations. This study is testing the hypotheses that:

1. 1.low-dose total body irradiation (TBI) in combination with cyclophosphamide (Cy) as lymphodepletion prior to administration of cilta-cel will be safe and tolerable in patients with multiple myeloma who have impaired renal function
2. 2.low-dose TBI-Cy as lymphodepletion prior to cilta-cel will result in comparable CAR T expansion/persistence and disease response rates as those seen with standard lymphodepleting chemotherapy (fludarabine / cyclophosphamide).

Conditions

Multiple Myeloma

Keywords

Chimeric antigen receptor T cells; Radiation; Immunotherapy; Renal failure

Outcome Measures

Primary Outcomes (1)

• Incidence of dose-limiting toxicities (DLTs)

  Toxicities considered possibly, probably, or definitely related to TBI-based lymphodepletion as graded per CTCAE v 5.0.

  Through 28 days post cilta-cel

Secondary Outcomes (16)

• Incidence of treatment related adverse events (TEAEs)

  Through completion of follow-up (estimated to 1 year and 1 week)

• Incidence of cytokine release syndrome (CRS)

  Through day 100

• Incidence of immune effector cell associated neurotoxicity syndrome (ICANS)

  Through day 100

• Best overall response by IMWG criteria

  Through completion of follow-up (estimated to 1 year and 1 week)

• Response rate by IMWG criteria

  Day 28 post cilta-cel

Study Arms (1)

Cyclophosphamide + Cilta-Cel + TBI

EXPERIMENTAL

All patients will undergo T-cell collection and CAR T manufacturing as per standard of care. Patients will receive cyclophosphamide per standard of care Day -5 to Day -3. They will subsequently receive TBI on Day -1 then and will receive cilta-cel infusion on Day 0.

Drug: Cyclophosphamide; Drug: Ciltacabtagene Autoleucel; Radiation: Total body irradiation

Interventions

Cyclophosphamide DRUG

Standard of care

Cyclophosphamide + Cilta-Cel + TBI

Ciltacabtagene Autoleucel DRUG

Standard of care

Also known as: Carvykti, cilta-cel

Cyclophosphamide + Cilta-Cel + TBI

Total body irradiation RADIATION

Radiation doses delivered to the entire body

Also known as: TBI

Cyclophosphamide + Cilta-Cel + TBI

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Histologically confirmed diagnosis of multiple myeloma.
• Renal insufficiency, defined as eGFR \< 45 by MDRD formula.
• At least 18 years of age.
• ECOG performance status ≤ 1.
• Meets standard of care indication for cilta-cel (per FDA approval).
• ANC ≥ 1.0 k/cumm. If neutropenia is present at initial screening but is judged to be attributable to bridging and/or leading therapies, patients can be re-tested within the screening period to confirm eligibility.
• Patients with a history of prior autologous hematopoietic cell transplant (AHCT) must have received a graft containing ≥2.0 x 106 CD34+ cells/kg body weight.
• Availability of adequate cryopreserved autologous stem cells (≥2.0 x 106 CD34+ cells/kg body weight) to allow for an autologous stem cell boost in case of prolonged cytopenias.
• Women of childbearing potential and men must agree to use adequate contraception prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while participating in this study or should a man suspect he has fathered a child, s/he must inform her treating physician immediately.
• Ability to understand and willingness to sign an IRB approved written informed consent document. Legally authorized representatives may sign and give informed consent on behalf of study participants.

You may not qualify if:

• Prior or concurrent malignancy whose natural history has the potential to interfere with the safety or efficacy assessment of the investigational regimen. Patients with prior or concurrent malignancy that does NOT meet that definition are eligible for this trial.
• Currently receiving any other investigational agents.
• Uncontrolled intercurrent illness including, but not limited to: ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, or unstable cardiac arrhythmia. Patients with a known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Function Classification; to be eligible for this trial, patients should be a class 2B or better.
• Pregnant and/or breastfeeding. Women of childbearing potential must have a negative pregnancy test within 14 days of study entry.
• HIV-infected if not on effective anti-retroviral therapy with undetectable viral load for 6 months. Patients with HIV who are receiving effective anti-retroviral therapy and have had an undetectable viral load for at least 6 months are eligible.
• Evidence of chronic hepatitis B virus (HBV) that is detectable on suppressive therapy. Patients with evidence of chronic HBV infection with undetectable HBV viral load on suppressive therapy are eligible.
• History of hepatitis C virus (HCV) infection that has not been cured or that has a detectable viral load. Patients with a history of HCV that has been treated and cured are eligible. Patients with HCV infection who are currently on treatment and have an undetectable HCV viral load are eligible.

Sponsors & Collaborators

• American Cancer Society, Inc.: collaborator
• Cures Within Reach: collaborator
• Washington University School of Medicine: lead

Study Sites (1)

Washington University School of Medicine

St Louis, Missouri, 63110, United States

RECRUITING

Related Links

• Alvin J. Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine

MeSH Terms

Conditions

Multiple Myeloma; Renal Insufficiency

Interventions

Cyclophosphamide; Whole-Body Irradiation

Condition Hierarchy (Ancestors)

Neoplasms, Plasma Cell; Neoplasms by Histologic Type; Neoplasms; Hemostatic Disorders; Vascular Diseases; Cardiovascular Diseases; Paraproteinemias; Blood Protein Disorders; Hematologic Diseases; Hemic and Lymphatic Diseases; Hemorrhagic Disorders; Lymphoproliferative Disorders; Immunoproliferative Disorders; Immune System Diseases; Kidney Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Male Urogenital Diseases

Intervention Hierarchy (Ancestors)

Phosphoramide Mustards; Nitrogen Mustard Compounds; Mustard Compounds; Hydrocarbons, Halogenated; Hydrocarbons; Organic Chemicals; Phosphoramides; Organophosphorus Compounds; Radiotherapy; Therapeutics; Investigative Techniques

Study Officials

• Michael J Slade, M.D., MSCI

  Washington University School of Medicine

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Michael J Slade, M.D., MSCI

CONTACT

314-454-8304; sladem@wustl.edu

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 30, 2024
• First Posted: October 2, 2024
• Study Start: December 4, 2024
• Primary Completion (Estimated): June 30, 2027
• Study Completion (Estimated): May 31, 2028
• Last Updated: March 11, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)