Frontline T-cell Engager vs Autologous Stem Cell Transplant (ASCT) and Measurable Residual Disease (MRD)-Guided Sequential Intensification thERapy in Multiple Myeloma

Eligibility Criteria

• 1. Age \>18 years with no upper age limit.
• 2. Newly diagnosed multiple myeloma with indication for initiation of therapy diagnosed within last 12 months. Pretreatment parameters necessary for disease characterization and response assessment must be available.
• 3. Eligible for ASCT according to institutional policy as evaluated by investigator.
• 4. Eastern Cooperative Oncology Group (ECOG) performance status 0-1 (Appendix A).
• 5. Prior induction therapy including one PI, lenalidomide, and an anti-CD38 mAb for 16-24 weeks, obtaining at least a partial response (PR).
• 6. Measurable disease meeting at least 1 of the following criteria (at the time of diagnosis):
• 7. Have trackable clonogenic sequence using ClonoSEQ® (Seattle, WA) identified from a high disease burden sample obtained as SoC and enabling MRD testing during screening phase.
• 8. Have clinical laboratory values meeting the following criteria during the Screening Phase and also at start of administration of study treatment:
• * Aspartate aminotransferase and alanine aminotransferase ≤2.5 × upper limit of normal (ULN)
• * Renal function: Creatinine clearance (CrCl) ≥40 mL/min based on calculation using Cockcroft-Gault formula or measured by a 24-hour urine collection.
• * Total bilirubin ≤2 × ULN, except in participants with congenital bilirubinemia, such as Gilbert syndrome (in which case direct bilirubin ≤3 × ULN is required)
• * Serum calcium corrected for albumin ≤14 mg/dL (≤3.5 mmol/L) or free ionized calcium ≤6.5 mg/dL (≤1.6 mmol/L)
• 9. Achievement of at least PR to induction therapy, without prior progression of disease.
• 10. Prior completion of standard of care mobilization and collection of stem cells (minimum 2 × 106 CD34+ cells/kg) without use of chemotherapy mobilization, any time prior to or during screening phase.
• 11. A woman of childbearing potential must have a negative highly sensitive serum pregnancy test at screening and again within 24 hours of the start of study treatment and must agree to further serum or urine pregnancy tests during the study.
• 12. A woman must be:
• 1. Not of childbearing potential, or
• 2. Of childbearing potential and practicing true abstinence; or
• 13. A woman must agree not to donate eggs (ova, oocytes) or freeze for future use, for the purposes of assisted reproduction during the study and for 4 months after receiving the last dose of study treatment.
• 14. A man must wear a condom (with or without spermicidal foam/gel/film/cream/suppository) when engaging in any activity that allows for passage of ejaculate to another person during the study and for a minimum of 90 days after receiving the last dose of study treatment. If a female partner is of childbearing potential, she must also be practicing a highly effective method of contraception.
• 15. A male participant must agree not to donate sperm for the purpose of reproduction during the study and for a minimum of 90 days after receiving the last dose of study treatment.
• 16. Must be willing and able to adhere to the lifestyle restrictions specified in this protocol.
• 17. Must sign an Informed Consent Form (ICF) (or their legally acceptable representative must sign) indicating that the participant understands the purpose of, and procedures required for, the study and is willing to participate in the study.
• 18. All participants must agree to comply with and be enrolled in Revlimid Risk Evaluation and Mitigation Strategy (REMS) program.
• 19. All participants must agree to comply with and be enrolled in elranatamab Risk Evaluation and Mitigation Strategy (REMS) program.
• 20. All participants must meet institution-specific criteria for ASCT eligibility as assessed by the Investigator.
• 1. Diagnosis of primary light chain amyloidosis, POEMS, Waldenstrom's macroglobulinemia, plasma cell leukemia, or central nervous system (CNS) involvement by MM.
• 2. Contraindications or life-threatening allergies, hypersensitivity, or intolerance to any study drug or its excipients (refer to the elranatamab Investigator's Brochure \[IB\] and appropriate package inserts).
• 3. Prior or concurrent exposure to any of the following:
• 4. Minimum washout period for prior therapy:
• 1. PI therapy - 14 days.
• 2. IMiD agent therapy -14 days.
• 3. Anti CD38 monoclonal therapy - 14 days.
• 4. Corticosteroids - 7 days.
• 5. Known active CNS involvement or exhibits clinical signs of meningeal involvement of MM. If either is suspected, negative whole brain magnetic resonance imaging and lumbar cytology are required.
• 6. Myelodysplastic syndrome or active malignancies (i.e., progressing or requiring treatment change in the last 24 months) other than MM. The only allowed exceptions are:
• 9. Moderate or severe persistent asthma within the past 2 years or uncontrolled asthma of any classification. Note that participants who currently have controlled intermittent asthma or controlled mild persistent asthma are allowed to participate in the study.
• 10. Prior allogeneic bone marrow, hematopoietic stem cell or solid organ transplant.
• 11. Participant is pregnant, breast-feeding, or planning to become pregnant while enrolled in this study or within 6 months after the last dose of study treatment.
• 12. Participant plans to father a child while enrolled in this study or within 90 days after the last dose of study treatment.
• 13. Presence of the following cardiac conditions: h. New York Heart Association Class III or IV congestive heart failure i. Myocardial infarction or coronary artery bypass graft ≤6 months prior to randomization j. History of clinically significant ventricular arrhythmia or unexplained syncope, not believed to be vasovagal in nature or due to dehydration.
• 1. History of Human Immunodeficiency Virus (HIV) infection or Acquired Immunodeficiency Syndrome (AIDS)-related illness.
• 2. Active or recent infection (including SARS-COV-2). Participants with prior or recent infection must have infection resolved for \>21 days and no use of systemic anti-infective therapy for \>28 days.
• 3. Hepatitis B infection (i.e., hepatitis B surface antigen \[HBsAg\] or hepatitis B virus \[HBV\]-DNA positive). In the event the infection status is unclear, quantitative viral levels are necessary to determine the infection status.
• 4. Active hepatitis C infection as measured by positive hepatitis C virus (HCV)-RNA testing. Participants with a history of HCV antibody positivity must undergo HCV-RNA testing. If a participant with history of chronic hepatitis C infection (defined as both HCV antibody and HCVRNA positive) completed antiviral therapy and has undetectable HCV-RNA for at least 12 weeks following the completion of therapy, the participant is eligible for the study.
• 15. Major surgery within 14 days prior to the start of administration of study treatment, or will not have fully recovered from surgery, or has major surgery planned during the time the participant is expected to be treated in the study or within 2 weeks after administration of the last dose of study treatment.
• 16. Contraindication or intolerance to required supportive care medications in the absence of alternative options.
• 17. Contraindication or intolerance to daratumumab or lenalidomide, or prior to toxicities to lenalidomide during induction requiring reduction of dose to \<10 mg/day.
• 18. Significant neuropathy (Grades 3-4 or Grade 2 with pain). 19. History of Guillain-Barre Syndrome or variant. 20. Concurrent medical or psychiatric condition or disease that is likely to interfere with study procedures or results, or that in the opinion of the Investigator would constitute a hazard for participating in this study, such as:
• 5. Uncontrolled diabetes.
• 6. Acute diffuse infiltrative pulmonary disease.
• 7. History of autoimmune disease with the exception of vitiligo, type I diabetes, and prior autoimmune thyroiditis that is currently euthyroid based on clinical symptoms and laboratory testing.
• 8. Disabling psychiatric conditions (e.g., alcohol or drug abuse), severe dementia, or altered mental status.
• 9. Any other issue that would impair the ability of the participant to receive or tolerate the planned treatment at the investigational site, to understand informed consent or any condition for which, in the opinion of the Investigator, participation would not be in the best interest of the participant (e.g., compromise the well-being) or that could prevent, limit, or confound the protocol-specified assessments.
• 10. History of non-compliance with recommended medical treatments.