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No longer recruiting (closed or complete)Last updated: 15 July 2026

PROSPER: A trial for people with advanced solid cancers with KRAS G12C mutations to evaluate the safety and effectiveness of different dose levels of a new targeted medicineAn Open-Label, Phase 1/2 Dose Escalation, Dose Expansion and Cohort Expansion Study Evaluating the Safety, PK and Clinical Activity of FMC-376 in Participants With KRAS G12C Mutated Locally Advanced Unresectable or Metastatic Solid Tumors

Trial purpose

Medical clipboardCancer treatment

Tumor type

Multi-Cancer Multi-Cancer

Age

People18+

Trial acronym

PROSPER

Clinical summary

Summary

This clinical trial will be conducted in 3 parts: Phase 1A (Dose Escalation), Phase 1B (Dose Expansion), and Phase 2 (Cohort Expansion).

Multiple doses of the investigational small-molecule drug called FMC-376 will be evaluated. FMC-376 will be given as an oral capsule, in 21-day cycles.

To be eligible you must have received and progressed on, or been intolerate to, prior standard treatment, or standard treatment is considered in appropriate for you, or an investigational medicine is considered standard of care.

Conditions

This trial is treating people with locally advanced, unresectable or metastatic solid cancers with KRAS G12C mutations

Eligibility

Inclusion

  • Histologically or cytologically confirmed locally advanced unresectable or metastatic solid tumors with KRAS G12C mutation
  • Received and progressed or been intolerant to prior standard therapy OR standard therapy is considered inappropriate OR an investigational agent is considered standard of care
  • Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1
  • Adequate hematological, renal, and hepatic function
  • Agrees not to participate in another interventional study while receiving study drug

Exclusion

  • Leptomeningeal disease or carcinomatous meningitis
  • Clinically significant toxicity resulting from prior cancer therapies
  • Known or suspected hypersensitivity to FMC-376 or any components of the study drug
  • Condition that would interfere with study drug absorption
  • Any illness or medical history that would impact safety or compliance with study requirements or impact ability to interpret study data

Inclusion

  • You have had treatment, but your cancer has come back (relapsed or recurrent).
  • Your cancer has spread to other parts of the body (metastatic) or has grown into nearby parts of the body (locally advanced).
  • Your cancer has not spread to other parts of the body, but it is not possible to perform surgery to remove it (unresectable).
  • You have had treatment but your cancer has gotten worse or has not responded to the treatment you have been given.
  • You are able to swallow medication by mouth.

Exclusion

  • You have certain types of non-cancer medical conditions.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

Participating hospitals

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

Trial sponsor

Frontier Medicines Corporation

Scientific Title

An Open-Label, Phase 1/2 Dose Escalation, Dose Expansion and Cohort Expansion Study Evaluating the Safety, PK and Clinical Activity of FMC-376 in Participants With KRAS G12C Mutated Locally Advanced Unresectable or Metastatic Solid Tumors

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