A Study of HLD-0915 in Patients With Metastatic Castration Resistant Prostate Cancer (mCRPC)

NCT ID: NCT06800313

Last Updated: 2025-10-16

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

33 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-02-24

Study Completion Date

2027-03-31

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

Assessment of the safety and efficacy of HLD-0915 as monotherapy in patients with metastatic castration resistant prostate cancer (mCRPC) that have progressed on prior systemic therapies, once a recommended dose for expansion (RDE) has been determined in Phase 1 of the trial.

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

This is a Phase 1/2, open-label study of the safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and anti-tumor activity of oral single-agent HLD-0915. Patients on the study must continue androgen deprivation therapy (ADT) unless surgically castrated,

The study will include an initial Phase 1 portion to determine the maximum tolerated dose (MTD) and/or recommended dose(s) for expansion (RDEs) of HLD-0915 as monotherapy and Phase 2 expansion cohorts to further evaluate the efficacy and safety of HLD-0915.

Phase 1 of this study is an open-label, dose-escalation and cohort expansion study in patients with mCRPC that have progressed after prior systemic therapies. Patients will be enrolled in monotherapy dose-escalation cohorts using a Bayesian optimal interval with backfill (BF-BOIN) design. Patients are treated in cohort size of 3 with the enrollment staggered between cohorts.

Phase 2 of this study will evaluate the anti-tumor activity of HLD-0915 administered at the RDEs in patients with mCRPC. Phase 2 study design and patient population will be based on the outcomes of Phase 1 of the trial.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Prostate Cancer Metastatic Disease Prostate Cancer (Adenocarcinoma)

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

NA

Intervention Model

SEQUENTIAL

Phase 1 dose escalation will employ the BF-BOIN design (to find the Maximum Tolerated Dose (MTD)/ Recommended Dose for Expansion (RDE). BF-BOIN enables backfilling patients to doses that are cleared for safety during the dose escalation, thereby generating additional data on safety, tolerability, and preliminary activity on doses below the MTD. This facilitates the identification of the RDE(s). The BF-BOIN consists of two interrelated components: dose escalation and backfill.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

HLD-0915

Oral HLD-0915 administered as a single agent on a 21-day treatment cycle.

Group Type EXPERIMENTAL

HLD-0915

Intervention Type DRUG

A treatment cycle consists of 21 days. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.)

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

HLD-0915

A treatment cycle consists of 21 days. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.)

Intervention Type DRUG

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

All patients must meet the following criteria to be eligible for Phase 1 study participation:

1. Males of age 18 years at the time of signing the informed consent form (ICF).
2. Able to understand and voluntarily sign an informed consent document prior to any study-related assessments/procedures.
3. Patients must have histological, pathological, and/or cytological confirmation of adenocarcinoma of the prostate.
4. Patients must have prior orchiectomy and/or ongoing androgen-deprivation therapy and a castrate level of serum testosterone.
5. Patients must have progressed on prior line(s) of therapy.
6. Patients must have progressive mCRPC defined as having demonstrated PSA progression on the prior regimen. PSA progression may have occurred with or without accompanying radiographic progression.
7. Eastern Cooperative Oncology Group (ECOG) performance status 0-1.
8. Life expectancy of at least 3 months.
9. Adequate hematological, renal, and hepatic function.
10. Able to swallow an oral medication.
11. Willing and able to adhere to the study visit schedule and other protocol requirements.
12. Patients on a stable bisphosphonate or denosumab regimen for 30 days prior to enrollment are eligible.

Exclusion Criteria

Patients with any of the following will be excluded from participation in Phase 1 of the study:

1. Has experienced a recent major bleed or has a known bleeding disorder.
2. Tumors exhibiting neuroendocrine or small cell carcinoma component by histopathology.
3. Receiving continuous corticosteroids at prednisone-equivalent dose of \>10 mg/day.
4. Has received systemic anti-cancer therapy (cytotoxic chemotherapy, biologic agent, checkpoint inhibitors, or radiation therapy) or investigational drugs within 2 weeks prior to first dose of study drug with certain exceptions requiring longer washout periods.
5. History of myocardial infarction or unstable angina within 6 months prior to enrollment, or clinically significant cardiac disease.
6. Known clinically significant active or chronic infection.
7. Acute or chronic uncontrolled renal disease, pancreatitis, or liver disease.
Minimum Eligible Age

18 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

Meet the organizations funding or collaborating on the study and learn about their roles.

Halda Therapeutics OpCo, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.

Responsibility Role SPONSOR

Locations

Explore where the study is taking place and check the recruitment status at each participating site.

Sarah Cannon Research Institute at HealthONE

Denver, Colorado, United States

Site Status RECRUITING

Yale - New Haven Hospital - Yale Cancer Center

New Haven, Connecticut, United States

Site Status RECRUITING

Florida Cancer Specialists

Sarasota, Florida, United States

Site Status RECRUITING

Massachusetts General Hospital

Boston, Massachusetts, United States

Site Status RECRUITING

START Midwest, LLC

Grand Rapids, Michigan, United States

Site Status RECRUITING

Evelyn H. Lauder Breast and Imaging Center (BAIC)

New York, New York, United States

Site Status RECRUITING

Carolina Urologic Research Center, LLC

Myrtle Beach, South Carolina, United States

Site Status RECRUITING

SCRI Oncology Partners

Nashville, Tennessee, United States

Site Status RECRUITING

NEXT Austin

Austin, Texas, United States

Site Status RECRUITING

The University of Texas M.D. Anderson Cancer Center

Houston, Texas, United States

Site Status RECRUITING

Royal Marsden Hospital

Sutton, Surrey, United Kingdom

Site Status RECRUITING

Countries

Review the countries where the study has at least one active or historical site.

United States United Kingdom

Central Contacts

Reach out to these primary contacts for questions about participation or study logistics.

Medical Monitor

Role: CONTACT

475-273-6214

Other Identifiers

Review additional registry numbers or institutional identifiers associated with this trial.

HLD-0915-ONC-101

Identifier Type: -

Identifier Source: org_study_id

More Related Trials

Additional clinical trials that may be relevant based on similarity analysis.

177Lu-J591 and 177Lu-PSMA-617 Combination for mCRPC
NCT03545165 TERMINATED PHASE1/PHASE2
Fractionated and Multiple Dose 225Ac-J591 for Progressive mCRPC
NCT04506567 ACTIVE_NOT_RECRUITING PHASE1/PHASE2