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A Trial to Study if REGN5837 in Combination With Odronextamab is Safe for Adult Participants With Aggressive B-cell Non-Hodgkin Lymphomas

A Phase 1 Study to Assess Safety and Tolerability of REGN5837, an Anti-CD22 x Anti-CD28 Costimulatory Bispecific Monoclonal Antibody, in Combination With Odronextamab, an Anti-CD20 x Anti-CD3 Bispecific Monoclonal Antibody, in Patients With Aggressive B-Cell Non-Hodgkin Lymphomas (ATHENA-1)

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05685173
Acronym
ATHENA-1
Enrollment
107
Registered
2023-01-13
Start date
2023-04-20
Completion date
2030-01-13
Last updated
2026-05-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

B-cell Non-Hodgkins Lymphoma (B-NHL)

Keywords

Aggressive B-Cell Non-Hodgkin Lymphomas, Relapsed or Refractory

Brief summary

This study is researching an experimental drug called REGN5837 in combination with another drug, odronextamab (called "study drug\[s\]"), in patients with relapsed or refractory aggressive B-cell Non-Hodgkin Lymphomas (B-NHLs). The study has 2 parts. The aim of the first part (dose escalation) is to find a safe dose of REGN5837 when given in combination with odronextamab. The goal of the second part (dose expansion) is to use the REGN5837 drug dose found in the first part to see how well REGN5837 in combination with odronextamab works. The study is looking at several other research questions, including: * What side effects may happen from taking the study drugs * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drugs (that could make the drugs less effective or could lead to side effects)

Interventions

DRUGOdronextamab

Administered per the protocol

DRUGREGN5837

Administered per the protocol

Sponsors

Regeneron Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: 1. Have documented CD20+ aggressive B-NHL, with disease that has progressed after at least 2 lines of systemic therapy containing an anti-CD20 antibody and an alkylating agent, as described in the protocol. 2. Measurable disease on cross sectional imaging as defined in the protocol 3. Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 4. Adequate bone marrow, renal and hepatic function as defined in the protocol 5. Availability of tumor tissue for submission to central laboratory is required for study enrollment. Archival tumor tissue for histological assessment prior to enrollment is allowed 6. During dose expansion phase of the study, participant should be willing to undergo mandatory tumor biopsies, if in the opinion of the investigator, the participant has an accessible lesion that can be biopsied without significant risk to the participant. Key

Exclusion criteria

1. Prior treatments with allogeneic stem cell transplantation or solid organ transplantation, treatment with anti-CD20 x anti- CD3 bispecific antibody, such as odronextamab 2. Diagnosis of Mantle Cell Lymphoma (MCL) 3. Primary Central Nervous System (CNS) lymphoma or known involvement by non-primary CNS lymphoma, as described in the protocol 4. Treatment with any systemic anti-lymphoma therapy within 5 half-lives or within 14 days prior to first administration of study drug, whichever is shorter, as described in the protocol 5. Standard radiotherapy within 14 days of first administration of study drug, as described in the protocol 6. Continuous systemic corticosteroid treatment with more than 10 mg per day of prednisone or corticosteroid equivalent within 72 hours of start of odronextamab 7. Co-morbid conditions, as described in the protocol 8. Infections, as described in the protocol 9. Allergy/hypersensitivity: Known hypersensitivity to both allopurinol and rasburicase NOTE: Other protocol defined inclusion /

Design outcomes

Primary

MeasureTime frameDescription
Incidence of Dose Limiting Toxicities (DLTs) of REGN5837 in combination with odronextamabFrom Cycle 2, Day 1 to Cycle 2, Day 21 (each induction cycle is 21 days)A DLT is defined as any non-haematologic and haematologic toxicity, as defined in the protocol, unless the event is clearly attributable to the underlying disease or to an extraneous cause (including concomitant medications).
Incidence of Treatment-Emergent Adverse Events (TEAEs) of REGN5837 in combination with odronextamabUp to approximatively 5 yearsTreatment-emergent adverse events (TEAEs) are defined as those AEs that newly occurred or worsened during the on-treatment period and any treatment-related serious adverse events (SAEs) that occurred during the post-treatment period.
Severity of TEAEs of REGN5837 in combination with odronextamabUp to approximatively 5 yearsTreatment-emergent adverse events (TEAEs) are defined as those AEs that newly occurred or worsened during the on-treatment period and any treatment-related serious adverse events (SAEs) that occurred during the post-treatment period.
Incidence of Adverse Events of Special Interest (AESIs) of REGN5837 in combination with odronextamabUp to approximatively 5 yearsAn AESI (serious or non-serious) is one of scientific and medical concern specific to the sponsor's product or program, for which ongoing monitoring and rapid communication by the investigator to the sponsor can be appropriate.
Severity of AESIs of REGN5837 in combination with odronextamabUp to approximatively 5 yearsAn AESI (serious or non-serious) is one of scientific and medical concern specific to the sponsor's product or program, for which ongoing monitoring and rapid communication by the investigator to the sponsor can be appropriate.

Secondary

MeasureTime frameDescription
Concentrations of REGN5837 in the serumUp to 90 days post last study drug administration
Concentrations of odronextamab in the serumUp to 90 days post last study drug administration
Occurrence of Anti-Drug Antibodies (ADAs) to REGN5837Up to 90 days post last study drug administration
Occurrence of ADAs to odronextamabUp to 90 days post last study drug administration
Magnitude of ADAs to REGN5837Up to 90 days post last study drug administration
Magnitude of ADAs to odronextamabUp to 90 days post last study drug administration
Objective Response Rate (ORR) according to the Lugano Classification of responseUp to approximatively 5 yearsThe ORR is defined as the proportion of patients who achieve a best overall response CR or PR during or following study treatment according to the Lugano Classification based on local investigator review.
Complete Response (CR) according to the Lugano Classification of responseUp to approximatively 5 yearsThe CR rate is defined as the proportion of patients who achieve a best overall response CR during or following study treatment according to the Lugano Classification based on local investigator review.
Overall Survival (OS)Up to approximatively 5 yearsOS is measured from the start of study treatment until death due to any cause.
Progression Free Survival (PFS) according to the Lugano Classification of responseUp to approximatively 5 yearsPFS is defined as the time from the start of study treatment until the first date of progressive disease, or death due to any cause, whichever occurs first, based on local investigator review.
Duration of Response (DoR) according to the Lugano Classification of responseUp to approximatively 5 yearsDOR is defined for responders (patients with a best overall response of CR or PR). It is the time from the date of the first documented CR or PR until the date of the first date of progressive disease, or death due to any cause, whichever occurs first, based on local investigator review.

Countries

France, Netherlands, Spain, United Kingdom, United States

Contacts

CONTACTClinical Trials Administrator
clinicaltrials@regeneron.com844-734-6643
STUDY_DIRECTORClinical Trial Management

Regeneron Pharmaceuticals

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 20, 2026