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A randomized, multicenter, double-blind, Phase 3 study to investigate the safety and efficacy of belrestotug in combination with dostarlimab compared with placebo in combination with pembrolizumab in participants with previously untreated, locally advanced, unresectable or metastatic PD-L1 selected non small cell lung cancer (GALAXIES LUNG 301)

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-504753-12-00
Acronym
213823
Enrollment
328
Registered
2024-07-29
Start date
2024-10-01
Completion date
Unknown
Last updated
2025-10-31

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

Conditions

Lung Cancer, Non-Small Cell

Brief summary

PFS per RECIST 1.1 by BICR, defined as the time from the date of randomization to the date of first documented PD or death due to any cause, whichever comes first, OS, defined as the time from the date of randomization to the date of death due to any cause

Detailed description

ORR, defined as the of participants with a confirmed CR or confirmed PR per RECIST 1.1 by investigator assessment, MRR, defined as the percentage of participants with a molecular response (i.e., ≥ 50% reduction in ctDNA levels relative to baseline), PFS per RECIST 1.1 by investigator assessment, defined as the time from the date of randomization to the date of first documented PD or death due to any cause, whichever comes first, DOR per RECIST 1.1 by investigator assessment, defined as the time from the date of first confirmed response (CR or PR) to the date of first documented PD or death due to any cause, whichever comes first, TFST, defined as the time from the date of randomization to the date of the first subsequent anticancer therapy or death, whichever occurs first, Incidence of TEAEs, SAEs, and AESIs, Incidence of TEAEs/SAEs leading to dose withdrawals or treatment discontinuations, TTD in lung cancer symptoms defined as time from randomization to the first confirmed clinically meaningful deterioration as assessed by the NSCLC SAQ total score, TTD in physical functioning defined as time from randomization to the first confirmed clinically meaningful deterioration as assessed by the EORTC QLQ C30 physical functioning domain, Occurrence of ADA to dostarlimab and belrestotug

Interventions

DRUGJEMPERLI 500 mg concentrate for solution for infusion
DRUGKEYTRUDA 25 mg/mL concentrate for solution for infusion

Sponsors

Glaxosmithkline Research & Development Limited
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
PFS per RECIST 1.1 by BICR, defined as the time from the date of randomization to the date of first documented PD or death due to any cause, whichever comes first, OS, defined as the time from the date of randomization to the date of death due to any cause

Secondary

MeasureTime frame
ORR, defined as the of participants with a confirmed CR or confirmed PR per RECIST 1.1 by investigator assessment, MRR, defined as the percentage of participants with a molecular response (i.e., ≥ 50% reduction in ctDNA levels relative to baseline), PFS per RECIST 1.1 by investigator assessment, defined as the time from the date of randomization to the date of first documented PD or death due to any cause, whichever comes first, DOR per RECIST 1.1 by investigator assessment, defined as the time from the date of first confirmed response (CR or PR) to the date of first documented PD or death due to any cause, whichever comes first, TFST, defined as the time from the date of randomization to the date of the first subsequent anticancer therapy or death, whichever occurs first, Incidence of TEAEs, SAEs, and AESIs, Incidence of TEAEs/SAEs leading to dose withdrawals or treatment discontinuations, TTD in lung cancer symptoms defined as time from randomization to the first confirmed clinically

Countries

Belgium, Bulgaria, Croatia, Czechia, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026