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GI-101

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: May 15, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDBiomarker
Total Trials1
Total Enrollment317

FDA Designations

No designations recorded

Clinical trial landscape

GI-101 · 1 trial · 6 indications

Phase 1 1
NCT04977453GI-101/GI-101A as a Single Agent or in Combination With Pembrolizumab or Lenvatinib in Advanced Solid TumorsAdvanced Solid Tumor
RECRUITING317 Analytics
PHASE1RECRUITING
GI-101/GI-101A as a Single Agent or in Combination With Pembrolizumab or Lenvatinib in Advanced Solid Tumors
Advanced Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and nature of Dose-Limiting Toxicity (DLTs), Incidence, nature, and severity of adverse events (AEs) and immune-related AEs (irAEs)
Study Day 1, assessed up to approximately 24 months

Dose escalation and optimization phase of Part A, B, and C and Dose escalation phase of Part E and F

Objective Response Rate (ORR), Disease Control Rate (DCR) and Duration of Response (DoR) according to RECIST version 1.1
Study Day 1, assessed up to approximately 24 months

Based on Central review (Part G1) and Investigator review (Part G2) of radiographic imaging in Part G1 Dose optimization cohorts, Part G2 Indication-specific cohorts ORR only; Based on Investigator review of radiographic imaging in dose expansion phase of Part A, B and C

Secondary Endpoints

Serum concentration of GI-101/GI-101A at specified timepoints
Study Day 1, assessed up to approximately 24 months
Anti-tumor activities
Study Day 1, assessed up to approximately 24 months
Incidence, nature, and severity of adverse events (AEs) graded according to CTCAE v5.0
Study Day 1, assessed up to approximately 24 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
GI-101EXPERIMENTALDose escalation: GI-101, multiple ascending doses Dose expansion:
GI-101 + PembrolizumabEXPERIMENTALDose escalation: GI-101, multiple ascending doses Dose expansion:
GI-101 + LenvatinibEXPERIMENTALDose optimization: Dose expansion:
GI-101AEXPERIMENTALDose escalation: GI-101A, multiple ascending doses
GI-101A + PembrolizumabEXPERIMENTALDose escalation: GI-101A, multiple ascending doses Dose optimization Indication-specific cohorts

Interventions

NameTypeDescription
GI-101DRUGRecommended phase 2 dose of GI-101 will be administered via IV infusion Q3W up to 2 years (approximately 35 years).
Pembrolizumab (KEYTRUDA®)DRUGPembrolizumab will be administered at a dose of 200 mg as IV infusion Q3W.
LenvatinibDRUGLenvatinib will be administered at an approved dose orally.
GI-101ADRUGRecommended phase 2 dose of GI-101A will be administered via IV infusion Q3W up to 2 years (approximately 35 years).
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites12

Key Inclusion Criteria: * Males and females aged ≥ 18 years (or ≥ 19 years according to local regulatory guidelines) at the time of screening. * Has adequate organ and marrow function as defined in protocol. * Measurable disease as per RECIST v1.1. * ECOG performance status 0-1. * Adverse events re...

Countries:United StatesSouth Korea
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced Solid Tumor")

Frequently asked questions about GI-101

What is GI-101 used for in advanced solid tumors?

GI-101 is an investigational small molecule being studied for the treatment of advanced solid tumors, including metastatic solid tumors, cervical cancer, urothelial carcinoma, clear cell renal cell cancer (ccRCC), and squamous cell non-small cell lung cancer. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

Who makes GI-101?

GI-101 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The drug is currently in Phase 1 clinical trials for advanced solid tumors.

What phase is GI-101 in?

GI-101 is in Phase 1 clinical development. It is an investigational drug being studied in a single active clinical trial for advanced solid tumors. The drug has not been approved by the FDA and remains in early-stage clinical testing.

What clinical trials is GI-101 in?

GI-101 is being studied in one active clinical trial, NCT04977453, which evaluates GI-101 as a single agent or in combination with pembrolizumab or lenvatinib in advanced solid tumors. The trial is recruiting participants in the United States and South Korea, with an enrollment of 317 patients.

Is GI-101 the same as GI-101A?

Yes, GI-101 is also referred to as GI-101A in clinical trial documentation. The trial NCT04977453 is titled 'GI-101/GI-101A as a Single Agent or in Combination With Pembrolizumab or Lenvatinib in Advanced Solid Tumors,' indicating that both names refer to the same investigational drug.