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IMC-F106C Regimen Versus Nivolumab Regimens in Previously Untreated Advanced Melanoma (PRISM-MEL-301)

A Phase 3 Randomized, Controlled Study of IMC-F106C Plus Nivolumab Versus Nivolumab Regimens in HLA-A*02:01-Positive Participants With Previously Untreated Advanced Melanoma (PRISM-MEL-301

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06112314
Acronym
PRISM-MEL-301
Enrollment
680
Registered
2023-11-01
Start date
2024-06-05
Completion date
2027-10-16
Last updated
2026-02-25

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

Conditions

Advanced Melanoma

Brief summary

This is a phase 3, randomized, controlled study of brenetafusp (IMC-F106C) plus nivolumab compared to standard nivolumab regimens in HLA-A\*02:01-positive participants with previously untreated advanced melanoma.

Interventions

Soluble PRAME-specific T cell receptor with anti-CD3 scFV concentrate for solution for intravenous (IV) infusion at a unit dose of 0.2 mg/mL.

DRUGNivolumab

Concentrate for solution for infusion at a unit dose of 10 mg/mL.

Concentrate for solution for infusion at a unit dose of 16 mg/mL.

Sponsors

Immunocore Ltd
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Participants must be HLA-A\*02:01-positive * Participants must have histologically confirmed Stage IV or unresectable Stage III melanoma * Archived or fresh tumor tissue sample that must be confirmed as adequate * Participants must have measurable disease per RECIST 1.1 * Participant must have BRAF V600 mutation status determined * Participants must have an Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1 * Male and female participants of childbearing potential who are sexually active with a non-sterilized partner must agree to use highly effective methods of birth control from the study screening date until 5 months after the final dose of study intervention

Exclusion criteria

* Participants with a history of a malignant disease other than those being treated in this study * Participants with untreated, active, or symptomatic central nervous system (CNS) metastases or carcinomatous meningitis * Hypersensitivity to IMC-F106C, nivolumab, relatlimab, or any associated excipients * Participants with clinically significant pulmonary disease or impaired lung function * Participants with clinically significant cardiac disease or impaired cardiac function * Participants with active autoimmune disease requiring immunosuppressive treatment * Participants with any medical condition that is poorly controlled or that would, in the Investigator's or Sponsor's judgment, adversely impact the participant's participation in the clinical study due to safety concerns, compliance with clinical study procedures, or interpretation of study results * Participants who received prior systemic anticancer therapy for unresectable or metastatic melanoma * Participants with a history of a life-threatening AE related to prior anti-PD-(L)1 or anti-LAG-3

Design outcomes

Primary

MeasureTime frameDescription
Progression-Free Survival (PFS)Up to ~45 monthsPFS as assessed by blinded independent central review (BICR) according to Response Evaluation Criteria in Solid Tumours (RECIST 1.1).

Secondary

MeasureTime frameDescription
Number of Participants Experiencing a Dose Interruption, Reduction, or DiscontinuationUp to ~45 monthsThe number of participants with a dose interruption, reduction, or discontinuation due to AE will be reported.
Maximum Plasma Concentration (Cmax) of IMC-F106CDay 1 of Weeks 1, 2, and 3: Predose and 0.5 and 4 hours postdoseThe Cmax of IMC-F106C will be reported.
Overall Survival (OS)Up to ~57 monthsOS is the time from randomization to time of death from any cause.
Overall Response Rate (ORR)Up to ~45 monthsORR as assessed by BICR according to RECIST 1.1.
Number of Participants Experiencing ≥1 Adverse Event (AE)Up to ~57 monthsAn AE is defined as the appearance of (or worsening of any pre-existing) undesirable sign, symptom, or medical condition that occur in the study.
Number of Participants Experiencing ≥1 Serious Adverse Event (SAE)Up to ~57 monthsAn SAE is any untoward medical consequence that results in death; requires inpatient hospitalization or prolongs existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; or any other important medical event in the opinion of the Investigator.
Association between PFS and Intra-Tumor Immune CellsUp to ~45 monthsThe potential association between the effect of IMC-F106C on efficacy and intra-tumor environment will be explored. Intra-tumor environment is estimated as the ratio of CD3+ to CD163+ cells and the correlation with PFS will be estimated by the hazard ratio (+/- 95% CI) from a Cox model. This analysis will be restricted to subjects randomized to receive IMC-F106C.
Incidence of anti-IMC-F106C AntibodiesUp to ~45 monthsThe incidence of anti-IMC-F106C antibodies, including neutralizing antibodies, will be reported.
Health-Related Quality of LifeUp to ~45 monthsThe change from baseline over time and between treatments of health-related quality of life will be reported.

Countries

Argentina, Australia, Austria, Belgium, Brazil, Bulgaria, Canada, Czechia, Denmark, Finland, France, Germany, Hungary, Italy, Lithuania, Mexico, Norway, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey (Türkiye), United Kingdom, United States

Contacts

CONTACTImmunocore Medical Information
medical.information@immunocore.com844-466-8661
CONTACTImmunocore Medical Information EU
medinfo.eu@immunocore.com+00 800-744-51111

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 27, 2026