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Study identifier: NCT06395519 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A Study of PARG Inhibitor ETX-19477 in Patients With Advanced Solid Malignancies

Condition: Advanced or Metastatic Solid Tumors · Breast Cancer · Ovarian Cancer  ·  Sponsor: 858 Therapeutics, Inc.

PhasePhase 1/Phase 2
Planned participants120
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This is a two-part, open-label, multicenter, dose escalation and dose expansion study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PDx), and anti- tumor activity of ETX-19477, a novel reversible small molecule inhibitor of PARG.

This description comes directly from the study's public registry record.

Talk to the study team

858 Therapeutics, Inc.  ·  (858) 987-8380  ·  dmccormick@8five8tx.com

Always discuss trial participation with your own doctor first.

Locations (14)

Mayo ClinicPhoenix, Arizona, United StatesRecruiting
Yale University, Yale Cancer CenterNew Haven, Connecticut, United StatesRecruiting
Mayo ClinicJacksonville, Florida, United StatesRecruiting
University of Chicago Medical CenterChicago, Illinois, United StatesRecruiting
Massachusetts General HospitalBoston, Massachusetts, United StatesRecruiting
Mayo ClinicRochester, Minnesota, United StatesRecruiting
Laura & Isaac Perlmutter Cancer Center at NYU Langone HealthNew York, New York, United StatesRecruiting
Memorial Sloan Kettering Cancer CenterNew York, New York, United StatesRecruiting
Stefanie Spielman Comprehensive Breast CenterColumbus, Ohio, United StatesRecruiting
Thomas Jefferson University, Sidney Kimmel Comprehensive Cancer CenterPhiladelphia, Pennsylvania, United StatesRecruiting
MD Anderson Cancer CenterHouston, Texas, United StatesRecruiting
START Center for Cancer Care - Mountain RegionSalt Lake City, Utah, United StatesRecruiting

+ 2 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT06395519