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A Study of IDRX-42 (GSK6042981) versus (vs) sunitinib in Participants with Gastrointestinal Stromal Tumors after imatinib Therapy

A Phase 3, Randomized, Multicenter, Open-Label Study of IDRX-42 (GSK6042981) versus Sunitinib in Participants with Metastatic and/or Unresectable Gastrointestinal Stromal Tumors (GIST) after Imatinib Therapy (StrateGIST 3)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031250371
Enrollment
450
Registered
2025-09-19
Start date
2025-10-30
Completion date
Unknown
Last updated
2026-06-29

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

Conditions

Gastrointestinal Stromal Tumors

Interventions

- IDRX-42 (GSK6042981) - Sunitinib

Sponsors

Ishibashi Hideyasu
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Participants with histologically or cytologically confirmed GIST that is metastatic and/or surgically unresectable. - Documented disease progression on or intolerance to imatinib administered for first-line treatment of unresectable/metastatic disease. - Tumor tissue must be available to be submitted to the central laboratory for retrospective biomarker analysis. The sample may be from archival tissue or a new biopsy. Tissue samples are not required to be submitted centrally prior to randomization.

Exclusion criteria

Exclusion criteria: - Known untreated or active central nervous system metastases. - Participants with a known allergy or hypersensitivity to any component of IDRX-42 (GSK6042981) or sunitinib. Participants with a history of Stevens-Johnson syndrome on a prior Tyrosine kinase inhibitor (TKI) are excluded. - Has a malignancy (except disease under study) that has progressed or required active treatment within the past 24 months except for basal cell 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.

Design outcomes

Primary

MeasureTime frame
PFS by BICR

Secondary

MeasureTime frame
- OS - PFS by investigator - ORR - Time to Response - PFS2 - QoL - PK - Safety

Countries

Belgium, Brazil, Canada, China, France, Germany, Hungary, Italy, Japan, Korea, Republic of, Netherlands, Norway, Poland, Romania, Spain, Taiwan, United Kingdom, United States

Contacts

Public ContactHideyasu Ishibashi

GlaxoSmithKline K.K.

jp.gskjrct@gsk.com+81-120-561-007

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026