A Study of SHY-ONC6, a Novel Proteasome Inhibitor, in Adults With Advanced or Metastatic Solid Tumors (Luca-1)

July 10, 2026 updated by: SHY Therapeutics

A Phase 1 Multicenter, Open-label Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of SHY-ONC6 in Participants With Advanced or Metastatic Solid Tumors

This is a Phase 1, first-in-human (FIH), open-label, multicenter study designed to evaluate the safety, tolerability, PK, and preliminary anti-tumor activity of SHY-ONC6 in participants with advanced or metastatic solid tumors who have progressed on or are intolerant to standard therapies. The study will consist of 2 parts: a dose escalation part (Phase 1a) and a dose expansion part (Phase 1b).

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

This is a Phase 1, first-in-human (FIH), open-label, multicenter study designed to evaluate the safety, tolerability, PK, and preliminary anti-tumor activity of SHY-ONC6 in participants with advanced or metastatic solid tumors who have progressed on or are intolerant to standard therapies. The study will consist of 2 parts: a dose escalation part (Phase 1a) and a dose expansion part (Phase 1b).

Study Type

Interventional

Enrollment (Estimated)

30

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • United States
    • Colorado
      • Denver, Colorado, United States, 80218
        • Not yet recruiting
        • SCRI at HCA HealthONE
        • Principal Investigator:
          • Gerald Falchook, MD
    • Texas
      • Houston, Texas, United States, 77030
        • Not yet recruiting
        • The University of Texas MD Anderson Cancer Center
        • Principal Investigator:
          • Timothy Yap, MBBS, PhD
      • San Antonio, Texas, United States, 78229
        • Recruiting
        • NEXT Oncology
        • Principal Investigator:
          • Ildefonso Rodriguez Rivera, MD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Male or female ≥18 years of age.
  • Life expectancy >3 months.
  • ECOG performance status 0-1.
  • Histologically/cytologically confirmed advanced or metastatic solid tumors that have progressed on or are intolerant/unsuitable for standard therapies. Eligible tumor types: TNBC, HR+ breast cancer, colon cancer, gastric cancer, HCC, NSCLC (adeno and squamous), mesothelioma, pancreatic cancer, HRPC, soft tissue sarcoma; other tumor types after Medical Monitor discussion. Stable CNS metastases ≥4 weeks post-radiotherapy and off steroids ≥14 days are permitted.
  • ≥1 measurable lesion per RECIST v1.1 (prostate cancer with bone-only disease and elevated PSA assessed by PCWG3).
  • Accessible tumor for biopsy
  • Adequate organ/bone marrow function.
  • Willingness and ability to provide informed consent.
  • Negative serum pregnancy test and use of effective contraception through 90 days after last dose for women of childbearing potential.
  • Male participants must use barrier contraception or abstinence and not donate sperm through 90 days after last dose.

Exclusion Criteria:

  • High-risk cardiovascular disease.
  • Concurrent anti-cancer treatment.
  • Active infection requiring systemic treatment within 2 weeks pre-dose.
  • History of another malignancy (with standard exceptions for in situ disease, non-melanoma skin cancers, and remission ≥2 years).
  • Active HBV (HBV-DNA >ULN), HCV (HCV-RNA >ULN), or HIV (well-controlled HIV with CD4 ≥350 cells/µL and undetectable viral load permitted); AIDS-defining opportunistic infection within 12 months.
  • Compromised pulmonary function within 6 months pre-dose .
  • Pregnancy or breastfeeding.
  • Recent radiotherapy, systemic anti-tumor therapy, other investigational therapy without appropriate washout.
  • Major surgery ≤4 weeks pre-dose.
  • Unable to swallow tablets or conditions affecting GI absorption.
  • Any medical or psychiatric disorders affecting compliance and/or interpretation of study results.
  • Persistent toxicities from prior anti-cancer therapy (exceptions apply)
  • Clinically significant corneal disease.
  • Unable to comply with prohibited concomitant medication restrictions.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: SHY-ONC6
Participants receive SHY-ONC6 administered orally once daily. Phase 1a, sequential dose levels are evaluated under accelerated titration and BOIN dose-escalation design. In Phase 1b, participants will be evaluated in disease-specific expansion cohorts and receive SHY-ONC6 at the RP2D range identified in Phase 1a.
Drug: SHY-ONC6
Participants receive SHY-ONC6 administered orally once daily in 21-day cycles. SHY-ONC6 will be administered until the participant withdraws from study, experiences unacceptable toxicity or other safety event, or their disease progresses.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Incidence of Dose-Limiting Toxicities (DLTs), Adverse Events (AEs), and Serious Adverse Events (SAEs)
Time Frame: Dose-limiting toxicities assessed from first dose through Day 21 of Cycle 1 (each cycle is 21 days). Adverse events and serious adverse events collected from first dose through 30 days after last dose.
Adverse events and serious adverse events graded per NCI CTCAE v6.0; supported by laboratory tests, vital signs, physical examinations, and triplicate 12-lead ECG. Dose-limiting toxicities assessed during Cycle 1 (Days 1 through 21).
Dose-limiting toxicities assessed from first dose through Day 21 of Cycle 1 (each cycle is 21 days). Adverse events and serious adverse events collected from first dose through 30 days after last dose.
Maximum Tolerated Dose (MTD)
Time Frame: Determined at the end of the Cycle 1 dose-limiting toxicity evaluation period (Cycle 1 is 21 days).
MTD determined using the BOIN (Bayesian Optimal Interval) design, with a target dose-limiting toxicity rate of 0.30, based on dose-limiting toxicity incidence observed during Cycle 1.
Determined at the end of the Cycle 1 dose-limiting toxicity evaluation period (Cycle 1 is 21 days).
Recommended Phase 2 Dose (RP2D)
Time Frame: Phase 1a: at the end of Cycle 1 (each cycle is 21 days). Phase 1b: through end of treatment plus a 30-day safety follow-up period.
Phase 1a: RP2D range determined from dose-limiting toxicity, adverse event, and serious adverse event incidence together with the MTD determination. Phase 1b: RP2D defined by integrated safety, efficacy, pharmacodynamic, and pharmacokinetic data.
Phase 1a: at the end of Cycle 1 (each cycle is 21 days). Phase 1b: through end of treatment plus a 30-day safety follow-up period.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Maximum Plasma Concentration (Cmax)
Time Frame: Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Maximum observed plasma concentration of study drug.
Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Area Under the Plasma Concentration-Time Curve (AUC)
Time Frame: Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Area under the plasma concentration-versus-time curve for study drug.
Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Time to Maximum Plasma Concentration (Tmax)
Time Frame: Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Time from dosing to observed maximum plasma concentration of study drug.
Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Terminal Elimination Half-Life (t1/2)
Time Frame: Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Terminal elimination half-life of study drug.
Cycle 1 Day 1; Day 2 (24 hours post-dose); Day 8; and pre-dose on Day 15. Pre-dose and post-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Trough Plasma Concentration (Ctrough)
Time Frame: Pre-dose on Day 15 of Cycle 1 and pre-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Plasma concentration of study drug immediately prior to the next dose.
Pre-dose on Day 15 of Cycle 1 and pre-dose on Day 1 of subsequent cycles (each cycle is 21 days).
Overall Survival (OS)
Time Frame: From first dose until death, withdrawal, loss to follow-up, or study termination, assessed up to an estimated 12 months after last dose of study drug.
Time from first dose until death from any cause.
From first dose until death, withdrawal, loss to follow-up, or study termination, assessed up to an estimated 12 months after last dose of study drug.
Incidence of Adverse Events (AEs) and Serious Adverse Events (SAEs) (Phase 1b)
Time Frame: From first dose through end of treatment plus a 30-day safety follow-up period.
Adverse events and serious adverse events graded per NCI CTCAE v6.0, collected during Phase 1b.
From first dose through end of treatment plus a 30-day safety follow-up period.
Anti-Tumor Activity - Objective Response Rate
Time Frame: Baseline through study completion, an average of 18 months.
Objective response rate defined as the proportion of patients with a confirmed best overall response of either complete response or partial response, as determined per investigator assessment by RECIST v1.1 (PCWG3 for prostate cancer with bone disease).
Baseline through study completion, an average of 18 months.
Anti-Tumor Activity - Best Overall Response (BOR)
Time Frame: Baseline through study completion, an average of 18 months.
Best response recorded from first dose until disease progression (complete response, partial response, stable disease, or progressive disease), per RECIST v1.1 (PCWG3 for prostate cancer with bone disease).
Baseline through study completion, an average of 18 months.
Anti-Tumor Activity - Time to Response (TTR)
Time Frame: From baseline until first documented response, assessed up to an estimated 18 months.
Time from first dose to first documented complete response (CR) or partial response (PR) per RECIST v1.1 (PCWG3 for prostate cancer with bone disease).
From baseline until first documented response, assessed up to an estimated 18 months.
Anti-Tumor Activity - Duration of Response (DOR)
Time Frame: Baseline through study completion, an average of 18 months.
Time from first documented complete response (CR) or partial response (PR) to disease progression or death from any cause, per RECIST v1.1 (PCWG3 for prostate cancer with bone disease).
Baseline through study completion, an average of 18 months.
Anti-Tumor Activity - Progression-Free Survival
Time Frame: Baseline through study completion, an average of 18 months.
Time from first dose to first documented disease progression per RECIST v1.1 (PCWG3 for prostate cancer with bone disease) or death from any cause.
Baseline through study completion, an average of 18 months.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

SHY Therapeutics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

June 29, 2026

Primary Completion (Estimated)

May 15, 2027

Study Completion (Estimated)

May 15, 2028

Study Registration Dates

First Submitted

July 1, 2026

First Submitted That Met QC Criteria

July 10, 2026

First Posted (Actual)

July 15, 2026

Study Record Updates

Last Update Posted (Actual)

July 15, 2026

Last Update Submitted That Met QC Criteria

July 10, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SHY-ONC6-101

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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