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A Phase 1/2 open-label, multicenter study of oral GSK5460025 alone or in combination with other anti-cancer agents in adult participants with Mismatch Repair-deficient (dMMR) or Microsatellite Instability-High (MSI-H) solid tumors.

Status
Not yet recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-522318-21-00
Enrollment
27
Registered
2026-04-14
Start date
Unknown
Completion date
Unknown
Last updated
2026-04-16

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

Conditions

Colorectal, Neoplasms

Brief summary

Part 1: Number of participants with dose limiting toxicities (DLTs) per dose level, Part 1: Number of participants with treatment emergent serious adverse events (TESAEs) and treatment emergent adverse events (TEAEs) by severity per dose level, Part 1: Duration of TESAEs and TEAEs per dose level, Part 1: Number of participants with TESAEs and TEAEs by severity per dose level during DLT observation period, Part 1: Number of participants with dosage modifications due to TEAEs per dose level, "Part 2: Objective Response Rate (ORR) ORR is defined as percentage of participants with confirmed complete response (CR) or partial response (PR) per Response Evaluation Criteria in Solid Tumors, version 1.1 (RECIST 1.1) by investigator assessment."

Detailed description

Part 1: Plasma concentrations for GSK5460025, Part 1: Area under the concentration-time curve (AUC) for GSK5460025, Part 1: Time to maximum concentration (Tmax) for GSK5460025, Part 1: Number of participants with clinically important changes in laboratory parameters, Electrocardiogram (ECGs), and vital signs per dose level, Part 2: Number of participants with TESAEs and TEAEs by severity, Part 2: Number of participants with TEAEs leading to dosage modifications, Part 2: Number of participants with clinically important changes in laboratory parameters, ECGs, and vital signs, PFS is defined as time from first dose to progressive disease (as assessed per RECIST 1.1 by Investigator assessment) or death from any cause, whichever is earlier, DoR is defined as time from first documented PR or CR to progressive disease (as assessed per RECIST 1.1 by investigator assessment) or death from any cause, whichever is earlier for participants who have achieved a confirmed CR or PR., Part 2: Plasma concentration of GSK5460025

Interventions

None listed

Sponsors

Glaxosmithkline Research & Development Limited
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Part 1: Number of participants with dose limiting toxicities (DLTs) per dose level, Part 1: Number of participants with treatment emergent serious adverse events (TESAEs) and treatment emergent adverse events (TEAEs) by severity per dose level, Part 1: Duration of TESAEs and TEAEs per dose level, Part 1: Number of participants with TESAEs and TEAEs by severity per dose level during DLT observation period, Part 1: Number of participants with dosage modifications due to TEAEs per dose level, "Part 2: Objective Response Rate (ORR) ORR is defined as percentage of participants with confirmed complete response (CR) or partial response (PR) per Response Evaluation Criteria in Solid Tumors, version 1.1 (RECIST 1.1) by investigator assessment."

Secondary

MeasureTime frame
Part 1: Plasma concentrations for GSK5460025, Part 1: Area under the concentration-time curve (AUC) for GSK5460025, Part 1: Time to maximum concentration (Tmax) for GSK5460025, Part 1: Number of participants with clinically important changes in laboratory parameters, Electrocardiogram (ECGs), and vital signs per dose level, Part 2: Number of participants with TESAEs and TEAEs by severity, Part 2: Number of participants with TEAEs leading to dosage modifications, Part 2: Number of participants with clinically important changes in laboratory parameters, ECGs, and vital signs, PFS is defined as time from first dose to progressive disease (as assessed per RECIST 1.1 by Investigator assessment) or death from any cause, whichever is earlier, DoR is defined as time from first documented PR or CR to progressive disease (as assessed per RECIST 1.1 by investigator assessment) or death from any cause, whichever is earlier for participants who have achieved a confirmed CR or PR., Part 2: Plasma co

Outcome results

None listed

Source: EU CTIS · Data processed: Apr 17, 2026