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Neoplasms, ColorectalPhase 1/2NCT07213609

A Study to Investigate the Safety and Preliminary Efficacy of GSK5460025 Alone or in Combination With Other Anti-cancer Agents in Participants With Solid Tumors

A Phase 1/2 study testing GSK5460025 in people with Neoplasms, Colorectal and Neoplasms, run by GlaxoSmithKline at 27 sites in 9 countries.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

Solid tumours are abnormal lumps of tissue that can occur in different parts of the body. The tumours involved in this study have specific genetic characteristics that can make them more aggressive and challenging to treat. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Neoplasms, Colorectal, Neoplasms
What is being tested?
GSK5460025
Could I receive a placebo?
No, everyone receives an active treatment
How many people
47 participants
Where
27 sitesin 9 countries
Study dates
20 Oct 2025to 27 Oct 2028
Phase
Phase 1/2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Has a histologically diagnosed advanced (unresectable, metastatic or recurrent) solid tumor
  • Has a known dMMR/MSI-H status as determined by a certified local laboratory at the time of Pre-screening or has an unknown Mismatch repair (MMR)/ Microsatellite Instability (MSI) status at the time of Pre-screening and MMR/MSI status will be determined by central reference laboratory
  • Provides an archival or fresh (preferred) formalin fixed, paraffin embedded (FFPE) sample
  • Intends to receive GSK5460025 as next treatment
  • Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
  • Is expected to have a minimum of 3 months life expectancy
Show all 13Show fewer
  • Has adequate organ function, as defined in the protocol
  • Part 1 inclusion criteria:
  • Has histologically diagnosed advanced (unresectable, metastatic or recurrent) solid tumor and has exhausted all standard of care treatment options
  • Part 2 inclusion criteria:
  • Has histologically diagnosed advanced (unresectable, metastatic or recurrent) Colorectal cancer (CRC) or Endometrial cancer (EC)
  • Has received at least 1 but no more than 3 lines of systemic anticancer therapy for their advanced (unresectable, metastatic or recurrent) disease including at least one line of Immune checkpoint inhibitors (ICI) therapy
  • Has measurable disease (i.e., at least 1 target lesion) during the Screening period per RECIST 1.1, as determined by the investigator

Who cannot join

  • Has not recovered (i.e., to Grade ≤1 or to baseline) from prior anticancer therapy-induced Adverse Events (AEs)
  • Has received prior treatment with a Werner (WRN) inhibitor or Nucleotide Excision Repair Targeting (NERT) agent.
  • Is unable to swallow and retain orally administered study treatment
  • Has untreated or progressed metastases in brain or CNS
  • Has a known additional malignancy that progressed or required active treatment within the last 2 years because reoccurrence of another malignancy would confound interpretation by RECIST 1.1 criteria. Exceptions include basal or squamous cell carcinomas of the skin or in situ carcinomas [e.g., breast, cervix, bladder] that have been resected with no evidence of metastatic disease.
  • Has any impairment of gastrointestinal function or gastrointestinal disease that may significantly alter the absorption of study drugs
  • Has cirrhosis or current unstable liver or biliary disease
  • Has known hypersensitivity to any of the study interventions or any of their excipients

Trial locations and contacts

27 sites in 9 countries. Contact the study team or a site near you to ask about taking part.

US GSK Clinical Trials Call Center contact

877-379-3718

GSKClinicalSupportHD@gsk.com

EU GSK Clinical Trials Call Center contact

+44 (0) 20 89904466

GSKClinicalSupportHD@gsk.com

27 sites in 9 countries

Spain5 sites, 5 recruiting
  • GSK Investigational Site

    Barcelona, 08035

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Madrid, 28034

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Madrid, 28040

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Madrid, 28041

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Madrid, 28050

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Spain

United States4 sites, 4 recruiting
  • GSK Investigational Site

    Aurora, Colorado, 80045

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Canton, Ohio, 44718

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Detroit, Michigan, 48201

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Nashville, Tennessee, 37203

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in United States

Japan4 sites, 4 recruiting
  • GSK Investigational Site

    Chiba, 277-8577

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Osaka, 573-1191

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Tokyo, 104-0045

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Tokyo, 135-8550

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Japan

Canada3 sites, 3 recruiting
  • GSK Investigational Site

    Hamilton, Ontario, L8V 5C2

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Montreal, Quebec, H4A 3J1

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Toronto, Ontario, M5G 2M9

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Canada

France3 sites, 3 recruiting
  • GSK Investigational Site

    Lyon, 69373

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Saint-Herblain, 44805

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Villejuif, 94805

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in France

Sweden3 sites, 3 recruiting
  • GSK Investigational Site

    Lund, 22185

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Stockholm, 17164

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Uppsala, 751 85

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Sweden

Italy2 sites, 2 recruiting
  • GSK Investigational Site

    Milan, 20141

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Milan, 20162

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Italy

Netherlands2 sites, 2 recruiting
  • GSK Investigational Site

    Amsterdam, 1066 CX

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting
  • GSK Investigational Site

    Utrecht, 3584 CX

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Netherlands

Denmark1 site, 1 recruiting
  • GSK Investigational Site

    København Ø, Capital Region, 2100

    US GSK Clinical Trials Call Center, 877-379-3718, GSKClinicalSupportHD@gsk.com

    EU GSK Clinical Trials Call Centre, +44 (0) 20 8990 4466, GSKClinicalSupportHD@gsk.com

    Recruiting

Other trials in Denmark

About this study

Official title: 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

Solid tumours are abnormal lumps of tissue that can occur in different parts of the body. The tumours involved in this study have specific genetic characteristics that can make them more aggressive and challenging to treat. The study will test whether GSK5460025 alone or in combination (potential combinations may be included in future amendments to the protocol) with other anti-cancer agents can decrease tumor size, is safe, well-tolerated, and how the drug is processed in the body over time.

Being tested
GSK5460025
Keywords
GSK5460025, Solid tumors, Colon cancer, Rectal cancer, Colorectal cancer, Endometrial cancer, Mismatch repair deficient, dMMR, microsatellite instability high, MSI-H
Medical subject headings
Colorectal Neoplasms, Neoplasms, Colonic Neoplasms, Rectal Neoplasms, Endometrial Neoplasms, Turcot syndrome

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • GSK5460025Drug

    GSK5460025 will be administered

Study groups in NCT07213609
Study groupRoleWhat they receive
Part 1: Dose escalation of GSK5460025 monotherapyExperimentalParticipants will receive GSK5460025 as monotherapy.
Receives: Drug: GSK5460025
Part 2: Dose expansion of GSK5460025 monotherapyExperimentalParticipants will receive GSK5460025 as monotherapy.
Receives: Drug: GSK5460025

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Part 1: Number of participants with dose limiting toxicities (DLTs) per dose level

    Measured: Up to 28 days

  2. Part 1: Number of participants with treatment emergent serious adverse events (TESAEs) and treatment emergent adverse events (TEAEs) by severity per dose level

    Measured: Up to approximately 33 months

  3. Part 1: Number of participants with TESAEs and TEAEs by severity per dose level during DLT observation period

    Measured: Up to 28 days

  4. Part 1: Number of participants with dosage modifications due to TEAEs per dose level

    Measured: Up to approximately 33 months

  5. 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.

    Measured: Up to approximately 33 months

Secondary outcomes (11)
  1. Part 1: Plasma concentrations for GSK5460025

    Measured: Up to approximately 36 months

  2. Part 1: Area under the concentration-time curve (AUC) for GSK5460025

    Measured: Up to approximately 36 months

  3. Part 1: Maximum concentration (Cmax) for GSK5460025

    Measured: Up to approximately 36 months

  4. Part 1: Time to maximum concentration (Tmax) for GSK5460025

    Measured: Up to approximately 36 months

  5. Part 1: Number of participants with clinically important changes in laboratory parameters, Electrocardiogram (ECGs), and vital signs per dose level

    Measured: Up to approximately 36 months

  6. Part 2: Number of participants with TESAEs and TEAEs by severity

    Measured: Up to approximately 36 months

  7. Part 2: Number of participants with TEAEs leading to dosage modifications

    Measured: Up to approximately 36 months

  8. Part 2: Number of participants with clinically important changes in laboratory parameters, ECGs, and vital signs

    Measured: Up to approximately 36 months

  9. Part 2: Progression-free Survival (PFS)

    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

    Measured: Up to approximately 36 months

  10. Part 2: Duration of Response (DoR)

    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.

    Measured: Up to approximately 36 months

  11. Part 2: Plasma concentration of GSK5460025

    Measured: Up to approximately 36 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted9 Oct 2025
  2. Study start20 Oct 2025
  3. Primary completion28 Sep 2028 (estimated)
  4. Study completion27 Oct 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
47 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07213609
Sponsor's protocol ID
224035
Other IDs
2025-522318-21, 2025
Status last verified
Sep 2026
First submitted
4 Jul 2025
Last updated
16 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/About\_GSK\_Patient\_Level\_Data\_Sharing\_Final\_13July2023.pdf

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing GSK5460025 in people with Neoplasms, Colorectal and Neoplasms, run by GlaxoSmithKline at 27 sites in 9 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 13 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 16 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 27 sites in Spain, United States, Japan, Canada, France and 4 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact US GSK Clinical Trials Call Center (877-379-3718, GSKClinicalSupportHD@gsk.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Part 1: Number of participants with dose limiting toxicities (DLTs) per dose level (time frame: Up to 28 days). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Sep 2026; AzTrials last refreshed its copy on 7 Nov 2026.

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