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GEN1046 Safety Trial in Patients With Malignant Solid Tumors

First-in-human, Open-label, Dose-escalation Trial With Expansion Cohorts to Evaluate Safety of GEN1046 in Subjects With Malignant Solid Tumors

Status
Active, not recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03917381
Enrollment
429
Registered
2019-04-17
Start date
2019-05-14
Completion date
2026-02-01
Last updated
2026-02-11

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

Conditions

Solid Tumors

Brief summary

The goal of this trial is to learn about the antibody acasunlimab (an antibody also known as GEN1046) when it is used alone and when it is used together with standard of care treatment (docetaxel) or another antibody cancer drug, pembrolizumab (with or without chemotherapy), for treatment of patients with certain types of cancer. All subjects will receive active drug; no one will receive placebo. This trial has 2 parts. The purpose of the first part is to find out if acasunlimab at various doses is safe and to find out the best doses of acasunlimab to use. The purpose of the second part is to give acasunlimab to more subjects to see how well the doses of acasunlimab selected in the first part work against cancer when given alone and how well they work when given with pembrolizumab with or without chemotherapy. Trial details include: * The average trial duration for an individual subject will be about 74 weeks. * The average treatment duration for an individual subject will be about 21 weeks. * The visit frequency will be weekly at first and lessening over time until visits are only once every 3 weeks.

Detailed description

The trial is an open-label, multi-center safety trial of acasunlimab (GEN1046). The trial consists of 2 consecutive parts: a first-in-human (FIH) dose escalation (phase 1) and an expansion (phase 2a). The expansion part of the trial will be initiated once the Recommended Phase 2 Dose (RP2D) has been determined.

Interventions

BIOLOGICALAcasunlimab

Acasunlimab will be administered intravenously once every 21 days (in selected expansion cohorts acasunlimab will be administered intravenously once every 21 days for the first 2 cycles, and every 42 days in subsequent cycles).

BIOLOGICALAcasunlimab in combination with docetaxel (in a single expansion cohort)

Acasunlimab and docetaxel will be administered intravenously once every 21 days.

BIOLOGICALAcasunlimab in combination with pembrolizumab (in a separate expansion cohort)

Acasunlimab and pembrolizumab will be administered intravenously once every 21 days or every 42 days, respectively.

BIOLOGICALAcasunlimab in combination with pembrolizumab and standard chemotherapy (in separate expansion cohorts)

Acasunlimab and pembrolizumab and standard chemotherapy will be administered intravenously once every 21 days for 4 cycles, followed by treatment with acasunlimab and pembrolizumab once every 21 days.

Sponsors

Genmab
Lead SponsorINDUSTRY

Study design

Allocation
NA
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: For Dose Escalation: • Have a histologically or cytologically confirmed non-CNS solid tumor that is metastatic or unresectable and for whom there is no available standard therapy For Expansion: • Have histologically or cytological confirmed diagnosis of relapsed or refractory, advanced and/or metastatic NSCLC, EC, UC, TNBC, SCCHN, or cervical cancer who are not anymore candidates for standard therapy For separate expansion cohorts: metastatic NSCLC without prior systemic treatment regimens for metastatic disease. For Both Dose Escalation and Expansion * Have measurable disease according to RECIST 1.1 * Have Eastern Cooperative Oncology Group (ECOG) 0-1 * Have an acceptable hematological status * Have acceptable liver function * Have an acceptable coagulation status * Have acceptable renal function Key

Exclusion criteria

* Have uncontrolled intercurrent illness, including but not limited to: * Ongoing or active infection requiring intravenous treatment with anti-infective therapy, or any ongoing systemic inflammatory condition requiring further diagnostic work-up or management during screening. * Symptomatic congestive heart failure (Grade III or IV as classified by the New York Heart Association), unstable angina pectoris or cardiac arrhythmia * Uncontrolled hypertension defined as systolic blood pressure ≥ 160 mmHg and/or diastolic blood pressure ≥ 100 mmHg, despite optimal medical management * Ongoing or recent evidence of autoimmune disease * History of irAEs that led to prior checkpoint treatment discontinuation * Prior history of myositis, Guillain-Barré syndrome, or myasthenia gravis of any grade * History of chronic liver disease or evidence of hepatic cirrhosis * History of non-infectious pneumonitis that has required steroids or currently has pneumonitis * History of organ allograft (except for corneal transplant) or autologous or allogeneic bone marrow transplant, or stem cell rescue within 3 months prior to the first dose of acasunlimab * Serious, non-healing wound, skin ulcer (of any grade), or bone fracture * Any history of intracerebral arteriovenous malformation, cerebral aneurysm, new (younger than 6 months) or progressive brain metastases or stroke * Prior therapy: * Radiotherapy within 14 days prior to first dose of acasunlimab. Note: palliative radiotherapy will be allowed. * Treatment with an anti-cancer agent (within 28 days or after at least 5 half-lives of the drug, whichever is shorter), prior to acasunlimab administration. Accepted exceptions are bisphosphonates (e.g., pamidronate, zoledronic acid, etc.) and denosumab * Toxicities from previous anti-cancer therapies that have not adequately resolved NOTE: Other protocol defined Inclusion/

Design outcomes

Primary

MeasureTime frameDescription
Dose Escalation: Number of Participants With Dose Limiting Toxicity (DLT)During first cycle (21 days) for each cohortToxicities will be graded for severity according to Common Terminology Criteria for Adverse Events (CTCAE) criteria version 5.0.
Dose Escalation and Monotherapy Expansion Cohorts: Number of Participants With Adverse Events (AEs)From first dose until the end of the study (up to 60 days after the last dose)
Expansion Cohort 1: Objective Response Rate (ORR)Up to 3 yearsORR is defined as the percentage of participants with best overall response (BOR) of complete response (CR) or partial response (PR) based on response evaluation criteria in solid tumours (RECIST).

Secondary

MeasureTime frameDescription
Expansion Cohort 1: Number of Participants With AEsFrom first dose until the end of the study (up to 60 days after the last dose)
Combination Therapy Expansion Cohorts: Number of Participants With AEsFrom first dose until the end of the study (up to 60 days after the last dose)
All Parts: Area Under the Concentration-Time Curve from Time Zero to Last Quantifiable Concentration (AUClast) of GEN1046Predose and postdose at multiple timepoints up to end of safety follow up (up to 60 days after last dose)
All Parts: Maximum Observed Plasma Concentration (Cmax) of GEN1046Predose and postdose at multiple timepoints up to end of safety follow up (up to 60 days after last dose)
All Parts: Number of Participants with Anti-drug Antibodies (ADAs)Up to 3 yearsVenous blood samples will be collected for measurement of serum concentrations of ADAs.
Dose Escalation and Expansion Cohorts 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13: ORRUp to 3 yearsORR is defined as the percentage of participants with BOR of CR or PR based on RECIST v1.1.
Dose Escalation and Expansion Cohorts 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13: Disease Control Rate (DCR)Up to 3 yearsThe DCR is defined as the percentage of participants with confirmed BOR of CR, PR, or Stable Disease (SD) according to RECIST v1.1.
All Parts: Duration of Response (DoR)Up to 3 yearsDOR is defined as the time from first documentation of response (CR or PR) to the date of the first documented progression or death whichever occurs earlier based on RECIST v1.1.
Expansion Cohort 1: Progression Free Survival (PFS)Up to 3 yearsPFS is defined as the number of days from Day 1 in Cycle 1 to the first documented progression or death due to any cause, whichever occurs first based on RECIST version 1.1.
Expansion Cohort 1: Overall survival (OS)Up to 3 yearsOS is defined as the number of days from Day 1 in Cycle 1 to death due to any cause.

Countries

Czechia, Georgia, Hungary, Israel, Italy, Poland, Spain, Turkey (Türkiye), Ukraine, United States

Contacts

STUDY_DIRECTORStudy Official

Genmab

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 17, 2026