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Phase 1/2 Study of MRTX849 in Patients With Cancer Having a KRAS G12C Mutation KRYSTAL-1

A Phase 1/2 Multiple Expansion Cohort Trial of MRTX849 in Patients With Advanced Solid Tumors With KRAS G12C Mutation KRYSTAL-1

Status
Active, not recruiting
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03785249
Enrollment
731
Registered
2018-12-24
Start date
2019-01-15
Completion date
2026-12-31
Last updated
2025-09-30

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

Conditions

Advanced Cancer, Metastatic Cancer, Malignant Neoplastic Disease

Keywords

KRAS, NSCLC, Colorectal Cancer, Colon Cancer, Metastatic Cancer, Pancreatic Cancer, Adagrasib, STK11 mutation, KRAS G12C

Brief summary

This study will evaluate the safety, tolerability, drug levels, molecular effects, and clinical activity of MRTX849 (adagrasib) in patients with advanced solid tumors that have a KRAS G12C mutation.

Detailed description

This study will evaluate the safety, tolerability, pharmacokinetics, metabolites, pharmacodynamics, and clinical activity of MRTX849 (adagrasib) in patients with advanced solid tumors with a KRAS G12C mutation. MRTX849 (adagrasib) is an orally-available small molecule inhibitor of KRAS G12C.

Interventions

MRTX849 will be administered orally once or twice daily in a continuous regimen

DRUGPembrolizumab

Pembrolizumab is administered as an intravenous infusion once every 3 weeks

DRUGCetuximab

Cetuximab will be administered as an intravenous infusion once per week or once every 2 weeks

DRUGAfatinib

Afatinib will be administered orally once a day in a continuous regimen

Sponsors

Mirati Therapeutics Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically confirmed diagnosis of a solid tumor malignancy with KRAS G12C mutation * Unresectable or metastatic disease * Standard treatment is not available or patient declines; first-line treatment for NSCLC for certain cohorts * Adequate organ function

Exclusion criteria

* History of intestinal disease or major gastric surgery or inability to swallow oral medications * Other active cancer

Design outcomes

Primary

MeasureTime frameDescription
Characterize the safety of MRTX849 in patients having advanced solid tumor malignancies with KRAS G12C mutation20 monthsNumber of participants with treatment related adverse events
Evaluate the pharmacokinetics of MRTX84920 monthsBlood plasma concentration
Evaluate clinical activity/efficacy of MRTX84920 monthsObjective response rate in accordance with Response Evaluation Criteria in Solid Tumors (RECIST)

Secondary

MeasureTime frameDescription
Establish maximum tolerated dose12 monthsNumber of participants with dose limiting toxicity
Evaluate the pharmacokinetics of MRTX849 administered with food6 monthsBlood plasma concentration
Characterize safety and tolerability of MRTX849 in combination with selected therapeutic agents12 monthsNumber of participants with dose limiting toxicity
Evaluate the pharmacokinetics of new MRTX849 oral formulations6 monthsBlood plasma concentration

Countries

Puerto Rico, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 21, 2026