A Phase II Trial Evaluating Safety and Efficacy of Epcoritamab With Gemcitabine, Dexamethasone, and Cisplatin (GDP) Salvage Chemotherapy in Relapsed Refractory Large B-cell Lymphoma
Subjects with relapsed large cell lymphoma will receive 3 cycles of combination therapy consisting of GDP and epcoritamab. Each cycle will last 21 days. GDP consists of gemcitabine 1000 mg/m2 IV on Days 1 and 8, cisplatin 75 mg/m2 IV on Day 1, and dexamethasone 40 mg orally on Days 1 through 4. Epcoritamab will be administered subcutaneously (SC) on Days 1, 8, and 15. Patients will receive granulocyte colony stimulating factor (G-CSF) between Day 8 through Day 10 of each cycle of combination therapy. Patients will then undergo radiology imaging for disease assessment. Patients may proceed to SCT(autologous or allogeneic) or CAR T-cell therapy or epcoritamab monotherapy upon completion of Cycle 3 per investigator discretion. The rationale for subjects not proceeding to autoSCT or CAR T-cell therapy will be captured in the eCRFs. Patients who do not undergo SCT or CAR T-cell therapy may have the option to receive study treatment with epcoritamab monotherapy following completion of Cycle 3. Epcoritamab monotherapy will be offered to selected subjects who become ineligible to undergo SCT or CAR T-cell therapy (such as social situation, change in subject decision). The decision to offer epcoritamab monotherapy will be per investigator's discretion. However, subjects must have demonstrated a response to the combination therapy (partial remission or complete remission) per disease assessment scans prior to offering epcoritamab monotherapy. Epcoritamab monotherapy should begin 2 weeks following Cycle 3 Day 15. Monotherapy will consist of epcoritamab 48 mg administered subcutaneously on Days 1 and 15 of each 28 day cycle for Cycle 4 to Cycle 9 or until unacceptable toxicity, or disease progression per the Lugano Criteria.
• Written informed consent and HIPAA authorization for release of personal health information prior to registration. NOTE: HIPAA authorization may be included in the informed consent or obtained separately.
• Age ≥ 18 years at the time of consent.
• ECOG Performance Status of 0-2 within 28 days prior to registration.
• Histological confirmed CD20+ relapsed large cell lymphoma according to the 5th edition of the WHO classification of the hematolymphoid tumors and the 2022 international consensus classification of mature lymphoid neoplasms including de-novo and transformed from prior indolent B-cell NHL such as follicular lymphoma, or marginal zone lymphoma (33, 34). NOTE: Subjects with high-grade B-cell lymphoma (HGBCL), NOS subtype, and high-grade B-cell lymphoma with c-MYC, Bcl2 and/or Bcl6 rearrangements (double or triple hit lymphoma) are eligible. Patients with primary mediastinal B-cell lymphoma, and T-cell histiocyte-rich B-cell lymphoma, primary cutaneous diffuse large B-cell lymphoma, leg type, Intravascular large B-cell lymphoma, Epstein-Barr virus-positive diffuse large B-cell lymphoma, NOS, Diffuse large B-cell lymphoma associated with chronic inflammation, and ALK-positive large B-cell lymphoma are eligible. Patients with Burkitt lymphoma or lymphoplasmacytic lymphoma are not eligible.
• Positron emission tomography (PET) positive measurable disease with at least 1 node having the longest diameter (LDi) greater than (\>) 1.5 centimeter (cm) or 1 extranodal lesion with LDi \>1 cm (per the Lugano Criteria 2014).
• Have received at least 1 prior line of systemic therapy for the treatment of large cell lymphoma. NOTE: Prior radiation therapy or systemic corticosteroids will not be considered a line of therapy.
• Must have had relapsed or refractory disease following standard frontline chemotherapy. Refractory disease is defined as large cell lymphoma not achieving complete remission, progressing or relapsing within 6 months after first-line chemotherapy based on PET/CT per the Lugano criteria. Relapsed disease is defined as disease that recurs beyond 6 months after completion of initial chemotherapy based on PET/CT per the Lugano criteria.
• Patients must be deemed eligible to proceed with stem cell transplantation (autologous or allogeneic) or CAR T-cell therapy per treating physician discretion. Patients being considered for allogeneic stem cell transplant may be eligible.
• Archival tissue obtained within 2 years of signing consent is required if available and will be identified at screening and shipped prior to Cycle 2 Day 1. If archival tissue is not available, fresh tissue from a standard of care biopsy is required. If a subject does not have archival tissue or is not undergoing a standard of care biopsy, they are not eligible for the trial. NOTE: A pre-treatment fresh tissue core or excisional biopsy at screening is preferred which should be considered standard of care.
⁃ Demonstrate adequate organ function. All screening labs to be obtained within 21 days prior to registration. \*Patients with bone marrow involvement will be eligible to participate in the study but must meet hematologic parameters.
⁃ Life expectancy of ≥ 6 months, as determined by the enrolling physician or protocol designee.
⁃ Females subjects of childbearing potential must have a negative urine or serum pregnancy test within 24 hours prior to study treatment. If a urine test is done and it is positice ir cannot be confirmed as negative, a serum pregnancy test will be required.
⁃ Female subjects of childbearing potential and male subjects must be willing to abstain from penile-vaginal intercourse or to use an effective method(s) of contraception.
⁃ As determined by the enrolling physician or protocol designee, ability of the subject to understand and comply with study procedures for the entire length of the study.