A Study of SAR444245 With or Without Other Anticancer Therapies for the Treatment of Adults and Adolescents With Relapsed or Refractory B Cell Lymphoma (Master Protocol) [Pegathor Lymphoma 205]

Phase 2 Non-randomized, Open-label, Multi-cohort, Multicenter Study Assessing the Clinical Benefit of SAR444245 (THOR-707) With or Without Other Anticancer Therapies for the Treatment of Adults and Adolescents With Relapsed or Refractory B Cell Lymphoma

This is a phase 2 multi-cohort, un-controlled, non-randomized, open-label, multi-center study that assessed the antitumor activity and safety of non-alpha interleukin (IL-2) SAR444245 with or without other anticancer therapies in participants aged 12 years and older with relapsed or refractory B cell lymphoma. This study was structured as a master protocol with separate sub studies designed to investigate the use of SAR444245 either with or without other anticancer therapies for the treatment of relapsed or refractory B cell lymphoma.

Substudy 1-Cohort A aimed to establish safety and preliminary anti-tumor activity for non-alpha interleukin (IL-2) SAR444245 combined with the anti-PD1 antibody, pembrolizumab in trial participants with classic Hodgkin lymphoma (cHL) who are anti-PD-(L)1-naive and have received at least 2 or 3 lines of systemic therapy.

Substudy 3-Cohort C1 aims to establish safety and preliminary anti-tumor activity for SAR444245 as monotherapy in trial participants with diffuse large B-cell lymphoma (DLBCL). Trial participants in this study must have received at least 2 lines of systemic therapy and have either stable or progressive disease 1-3 months post Health Authority approved Chimeric Antigen Receptor T-cell (CAR-T) treatment when given as last systemic treatment prior to study enrollment.

Study Overview

• Status: Terminated
• Conditions: Diffuse Large B-cell Lymphoma; Classic Hodgkin Lymphoma
• Intervention / Treatment: Drug: THOR-707; Drug: Pembrolizumab

Detailed Description

The duration of the study for an individual participant started from the signature of the main informed consent and included:

a screening period of up to 28 days;

a treatment period [max] 35 cycles (21 days per cycle) for Cohort A and 52 cycles (14 days per cycle) for Cohort C1 or until occurrence of unacceptable toxicities or until PD;

an end-of-treatment visit at least approximately 30 days following the last administration of study drug (or until the participant receives another anticancer therapy, whichever is earlier);

and a follow-up visits 3 months after treatment discontinuation and every 3 months thereafter following, until disease progression, or initiation of another antitumor treatment, or death, whichever is earlier.

• Study Type: Interventional
• Enrollment (Actual): 14
• Phase: Phase 2

Contacts and Locations

Study Locations

• Argentina
  • Buenos Aires
    • CABA, Buenos Aires, Argentina, 1430
      • Investigational Site Number : 0320005
• Chile
  • Temuco, Chile, 4800827
    • Investigational Site Number : 1520001
  • Reg Metropolitana de Santiago
    • Santiago, Reg Metropolitana de Santiago, Chile, 7500653
      • Investigational Site Number : 1520003
    • Santiago, Reg Metropolitana de Santiago, Chile, 7500921
      • Investigational Site Number : 1520002
  • Región de Valparaíso
    • Viña del Mar, Región de Valparaíso, Chile, 2540488
      • Investigational Site Number : 1520004
• Spain
  • Barcelona [Barcelona]
    • Barcelona, Barcelona [Barcelona], Spain, 08036
      • Investigational Site Number : 7240002
    • L'Hospitalet de Llobregat, Barcelona [Barcelona], Spain, 08908
      • Investigational Site Number : 7240001
  • Madrid, Comunidad de
    • Madrid / Madrid, Madrid, Comunidad de, Spain, 28040
      • Investigational Site Number : 7240004

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 12 years and older (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Participants must have been ≥ 12 years of age, at the time of signing the informed consent
• Disease location was amenable to tumor biopsy at baseline
• All participants must have had a measurable disease
• Both male and female participants agreed to use approved contraception methods; not pregnant or breastfeeding for female participants; no donation or cryopreservation of eggs (ova, oocytes) for female participants and sperms for male participants.
• Had to be capable of giving signed informed consent

For cohort A: Histologically or cytologically confirmed diagnosis of classic Hodgkin lymphoma (cHL), must have received at least two prior lines of systemic therapy for cHL, including at least one containing an anthracycline or brentuximab.

For cohort C1: Histologically confirmed diagnosis of diffuse large B Cell lymphoma (DLBCL), must have received at least two prior lines of systemic therapy for DLBCL, including one containing a combination of anthracycline and rituximab (or another anti-CD20 agent), with the last line of therapy a Health Authority approved CD19-directed CAR-T therapy. Patients must have BOR (Best Overall Response) of stable disease (SD) or progressive disease (PD) after CD-19 directed CAR-T therapy.

Exclusion Criteria:

Participants were excluded from the study if any of the following criteria applied:

• Eastern Cooperative Oncology Group (ECOG) performance status of ≥ 2 (≥ 16 years old). Lansky Scale (< 16 years old) ≤ 60%
• Poor bone marrow reserve
• Poor organ function
• Participants with baseline oxygen saturation (SpO2) ≤ 92% (without oxygen therapy)
• Lymphomatous involvement of the central nervous system
• History of allogenic or solid organ transplant
• Prior IV or subcutaneous anticancer therapy, investigational agent, major surgery within 21 days prior to initiation of IMP; oral anticancer therapy within 5 half-lives or completed palliative radiotherapy within 21 days prior to initiation of IMP
• Has received prior IL-2-based anticancer treatment
• Comorbidity requiring corticosteroid therapy
• Antibiotic use (excluding topical antibiotics) ≤ 14 days prior to first dose of IMP
• Severe or unstable cardiac condition within 6 months prior to starting study treatment
• Had active, known, or suspected autoimmune disease that has required systemic treatment in the past 2 years-Known second malignancy either progressing or requiring active treatment within the last 3 years
• Receipt of a live or live attenuated virus vaccination within 28 days of planned treatment start. Seasonal flu vaccines or SARS-CoV-2 vaccine that do not contain live virus were permitted

The above information is not intended to contain all considerations relevant to the potential participation in a clinical trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Cohort A: Pegenzileukin 24 μg/kg + Pembrolizumab; Participants with classic Hodgkin lymphoma (cHL) who were anti-programmed cell death-ligand 1 (PD-L1)-naïve and had received at least 2 or 3 lines of systemic therapy received pegenzileukin 24 microgram per kilogram (μg/kg) via intravenous (IV) infusion over 30 minutes on Day 1 of each cycle (each cycle is 21 days), along with pembrolizumab 200 milligram (mg) via 30 minutes IV infusion on Day 1 of each 3-week treatment cycle (each cycle is 21 days) as third-line or fourth-line (3/4L) therapy, until disease progression (PD), unacceptable adverse event (AE) or other full permanent discontinuation criteria was met or completion of Cycle 35.	Drug: THOR-707; Pharmaceutical Form: Solution for infusion Route of Administration: Intravenous infusion; Other Names: Pegenzileukin; Drug: Pembrolizumab; Pharmaceutical Form: Solution for infusion Route of Administration: Intravenous infusion; Other Names: KEYTRUDA® or generic
Experimental: Cohort C1: (sub study 03) diffuse large B Cell lymphoma (DLBCL); Pegenzileukin administered every 2 weeks on Day 1 of each cycle (14 days per cycle) for up to 52 cycles.	Drug: THOR-707; Pharmaceutical Form: Solution for infusion Route of Administration: Intravenous infusion; Other Names: Pegenzileukin

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Complete Response Rate (CRR)	The CRR was defined as the percentage of participants who had a complete response (CR) as the best overall response (BOR) as per Investigator assessment (Lugano response criteria 2014). The BOR was defined as the BOR observed from the date of first study treatment until PD, death, cut-off date or initiation of subsequent anti-cancer therapy, whichever occurred first. CR based on computed tomography (CT)-based response: lymph nodes and extralymphatic sites with target nodes/nodal masses must regress to <=1.5 centimeter (cm) in longest transverse diameter of a lesion (LDi) and no extralymphatic sites of disease.	From first dose of study treatment administration (Day 1) up to approximately 21 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective Response Rate (ORR)	ORR was defined as the percentage of the participants with CR or partial response (PR) as the BOR as per Investigator assessment (Lugano response criteria 2014). The BOR was defined as the BOR observed from the date of first study treatment until PD, death, cut-off date or initiation of subsequent anti-cancer therapy, whichever occurs first. CR (CT-based response): lymph nodes and extralymphatic sites with target nodes/nodal masses must regress to <=1.5cm in LDi and no extralymphatic sites of disease. PR (CT-based response): lymph nodes and extralymphatic sites with >=50% decrease in sum of the product of the perpendicular diameters for multiple lesions (SPD) of upto 6 target measurable nodes and extranodal sites. A lesion too small to measure on CT, 5 millimeter (mm) X 5mm used as default value. No longer visible, 0 X 0 mm. A node >5mm X 5mm, but smaller than normal, actual measurement used.	From first dose of study treatment administration (Day 1) up to maximum exposure of study treatment; approximately 28 months
Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (TESAEs)	An AE was any untoward medical occurrence in a participant or clinical study participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. An SAE was any AE that at any dose: resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect or was an important medical event. TEAEs were defined as AEs that developed, worsened (according to the Investigator's opinion) or became serious during the TE period.	From first dose of study treatment (Day 1) up to 30 days after the last dose of study treatment; approximately 29 months
Number of Participants With Dose Limiting Toxicities (DLTs)	Selected events that occurred during the DLT observation period were considered as DLT unless due to PD or to a cause obviously unrelated to pegenzileukin. Selected events included: grade 4 neutropenic fever, grade 4 thrombocytopenia associated with clinically significant bleeding that required clinical intervention, grade 3 or above alanine aminotransferase or aspartate aminotransferase in combination with a bilirubin >2 × upper limit of normal with no evidence of cholestasis or another cause, such as viral infection or other drugs, grade 3 or above vascular leak syndrome, grade 3 or above hypotension, grade 3 or above cytokine release syndrome, grade 3 or above AE that did not resolve to grade <=2 within 7 days of starting accepted standard of care medical management.	From Day 1 to Day 21 of Cycle 1 (each cycle is 21 days)
Time to Response (TTR)	The TTR was defined as the time from the first administration of study treatment to the first tumor assessment at which the overall response was recorded as PR or CR determined by Investigator (Lugano response criteria 2014). CR (CT-based response): lymph nodes and extralymphatic sites with target nodes/nodal masses must regress to <=1.5cm in LDi and no extralymphatic sites of disease. PR (CT-based response): lymph nodes and extralymphatic sites with >=50% decrease in sum of the product of the perpendicular diameters for multiple lesions (SPD) of upto 6 target measurable nodes and extranodal sites. A lesion too small to measure on CT, 5 millimeter (mm) X 5mm used as default value. No longer visible, 0 X 0 mm. A node >5mm X 5mm, but smaller than normal, actual measurement used.	From first dose of study treatment administration (Day 1) up to maximum exposure of study treatment; approximately 28 months
Duration of Response (DoR)	The DoR was defined as the time from the first tumor assessment at which the overall response was recorded as PR or CR until PD determined by Investigator (Lugano response criteria 2014), or death from any cause, whichever occurred first. CR (CT-based response): lymph nodes and extralymphatic sites with target nodes/nodal masses must regress to <=1.5cm in LDi and no extralymphatic sites of disease. PR (CT-based response): lymph nodes and extralymphatic sites with >=50% decrease in sum of the product of the perpendicular diameters for multiple lesions (SPD) of upto 6 target measurable nodes and extranodal sites. A lesion too small to measure on CT, 5 millimeter (mm) X 5mm used as default value. No longer visible, 0 X 0 mm. A node >5mm X 5mm, but smaller than normal, actual measurement used.	From first dose of study treatment administration (Day 1) up to maximum exposure of study treatment; approximately 28 months
Clinical Benefit Rate (CBR)	CBR was defined as percentage of participants with clinical benefit (CR or PR as BOR, or stable disease [SD] lasting at least 6 months) determined by Investigator per Lugano response criteria 2014. BOR was defined as BOR observed from date of first study treatment until PD, death, cut-off date or initiation of subsequent anti-cancer therapy, whichever occurred first. CR (CT-based response): lymph nodes and extralymphatic sites with target nodes/nodal masses must regress to <=1.5cm in LDi and no extralymphatic sites of disease. PR (CT-based response): lymph nodes and extralymphatic sites with >=50% decrease in SPD of upto 6 target measurable nodes and extranodal sites. A lesion too small to measure on CT, 5mm X 5mm used as default value. No longer visible, 0 X 0 mm. A node >5mm X 5mm, but smaller than normal, actual measurement used. SD (CT-based response): <50% decrease from baseline in SPD of up to 6 dominant, measurable nodes and extranodal sites; no criteria for PD met.	From first dose of study treatment administration (Day 1) up to maximum exposure of study treatment; approximately 28 months
Progression Free Survival (PFS)	The PFS was defined as the time from the date of first study treatment administration to the date of the first documented PD determined by Investigator (Lugano response criteria 2014), or death due to any cause. PFS (CT-based response): An individual node/lesion had to be abnormal with: LDi >1.5 cm and increased by >=50% from positron emission tomography nadir and an increase in LDi or shortest axis perpendicular to the LDi from nadir, 0.5cm for lesions <=2 cm, 1.0cm for lesions>2 cm. In the setting of splenomegaly, the splenic length must be increased by >50% of the extent of its prior increase beyond baseline. If there was no prior splenomegaly, increase by at least 2 cm from baseline. For new lesions regrowth of previously resolved lesions: a new node >1.5 cm in any axis, a new extranodal site>1.0 cm in any axis.	From first dose of study treatment administration (Day 1) up to maximum exposure of study treatment; approximately 28 months
Plasma Concentrations of Pegenzileukin	Blood samples were collected at specified timepoints for the assessment of plasma concentrations of pegenzileukin .	Cycle 1 Day 2, Cycle 1 Day 3 (each cycle is 21 days)
Concentration at End of Infusion (Ceoi) of Pegenzileukin	Blood samples were collected at specified timepoints for the assessment of Ceoi of pegenzileukin .	Cycles 1, 2, 4, 7, 10, 15 (each cycle is 21 days)
Number of Participants With Anti-Drug Antibodies (ADA) Against Pegenzileukin	Blood samples were collected at specified timepoints to assess the presence of ADA against pegenzileukin . Treatment-emergent ADA was defined as at least one treatment-induced or treatment-boosted ADA. Treatment-induced ADA was defined as ADA that developed during the TE period and without pre-existing ADA (including participants without pre-treatment samples). Treatment-boosted ADA was defined as pre-existing ADA that was boosted during the TE period to a significant higher titer than the baseline. Number of participants with treatment-emergent ADA is presented.	From first dose of study treatment (Day 1) up to 30 days after the last dose of study treatment; approximately 29 months

Collaborators and Investigators

• Sponsor: Sanofi
• Collaborators: Merck Sharp & Dohme LLC
• Investigators: Study Director: Clinical Sciences & Operations, Sanofi

Publications and helpful links

Helpful Links

• ACT16941 Plain Language Results Summary

Study record dates

Study Major Dates

• Study Start (Actual): December 7, 2021
• Primary Completion (Actual): September 14, 2023
• Study Completion (Actual): September 6, 2024

Study Registration Dates

• First Submitted: December 16, 2021
• First Submitted That Met QC Criteria: December 16, 2021
• First Posted (Actual): January 5, 2022

Study Record Updates

• Last Update Posted (Actual): December 24, 2025
• Last Update Submitted That Met QC Criteria: December 5, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; Immune System Diseases; Neoplasms by Histologic Type; Lymphatic Diseases; Lymphoproliferative Disorders; Immunoproliferative Disorders; Lymphoma, Non-Hodgkin; Lymphoma, B-Cell; Lymphoma; Hemic and Lymphatic Diseases; Lymphoma, Large B-Cell, Diffuse; Pharmaceutical Preparations; pembrolizumab; Drugs, Generic
• Other Study ID Numbers: ACT16941; U1111-1251-5834 (Registry Identifier: ICTRP); 2021-002150-91 (EudraCT Number); MK-3475-C39 (Other Identifier: Merck Sharp & Dohme LLC.); KEYNOTE-C39 (Other Identifier: Merck Sharp & Dohme LLC.)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: Yes