Safety and Tolerability of TNG456 Alone and in Combination With Abemaciclib in Patients With Solid Tumors With MTAP Loss
This is a first in human study of TNG456 alone and in combination with abemaciclib in patients with advanced or metastatic solid tumors known to have an MTAP loss. The first part of the study is an open-label, dose escalation and the second part is an open label dose expansion in specific solid tumor types with a confirmed MTAP loss. The study drug, TNG456, is a selective PRMT5 inhibitor administered orally. The study is planned to treat up to 191 participants.
Ask AI to explain this studyKey things to know
This describes the study’s primary purpose.
The study team can explain what participation involves.
These are broad labels—not an eligibility decision.
Checked against the public recordLast updated Oct 21, 2026 · Source: ClinicalTrials.gov
The study is currently accepting participants.
Interventional
Locations may change over time.
Study sponsor
What this study is about
- Purpose
- Treatment
- Study type
- Interventional
- Phase
- Phase 1 / Phase 2
- Sponsor
- Tango Therapeutics, Inc.
- Interventions being studied
- Drug: TNG456; Drug: abemaciclib
How this study is categorized
These labels come from structured fields and exact terms in the public record.
Who may be able to participate
The sponsor separates these requirements into two groups. You do not need to interpret them alone—use them to guide a conversation with the study team.
- Has a tumor with a confirmed MTAP loss
- Is ≥18 years of age at the time of signature of the main study ICF
- Has had progression or an inadequate response to or is intolerant of the approved standard of care therapy, no standard of care therapy exists, or the investigator has determined that treatment with the standard of care therapy is not appropriate.
- Is able to swallow tablets
- Adequate Organ function/reserve per local labs
- Negative serum pregnancy test result at screening
- Has an ECOG performance status score of 0 to 1
- Has measurable disease based on RECIST v1.1 or a confirmed glioblastoma (IDH-wildtype) with radiographic evidence of disease progression or recurrence defined by RANO 2.0.
- Has an ECOG performance score of 0 to 1 or for GBM has a Karnofsky performance status score ≥70.
- A female patient is who is pregnant or breastfeeding
- Has impaired GI function or disease that may significantly alter the absorption of oral study treatment(s)
- Has an active infection requiring systemic therapy
- Has received prior treatment with a PRMT5 inhibitor or a MAT2A inhibitor
- Patients in the expansion receiving the combination therapy that have received prior treatment with a CDK4/6 inhibitor
- Clinically relevant cardiovascular disease
- Has a prior or ongoing clinically significant illness may affect the safety of the patient, impair the assessment of study results or compliance with the protocol
Important: This is the sponsor’s public criteria, not a determination of eligibility. The study team must review your individual situation.
U.S. locations
- Mayo Clinic ScottsdaleScottsdale, Arizona
- University of California, IrvineIrvine, California
- University of California Los AngelesLos Angeles, California
- University of California at San FranciscoSan Francisco, California
- Sibley Memorial HospitalWashington D.C., District of Columbia
- Mayo Clinic JacksonvilleJacksonville, Florida
- Northwestern Memorial HospitalChicago, Illinois
- Dana Farber Cancer InstituteBoston, Massachusetts
- Mayo Clinic Cancer CenterRochester, Minnesota
- NYU Langone HealthNew York, New York
- Memorial Sloan Kettering Cancer CenterNew York, New York
- Ohio State University Comprehensive Cancer CenterColumbus, Ohio
Source and freshness
Processed from ClinicalTrials.gov. Last public update: Oct 21, 2026. Always confirm current availability with the study team.