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NCT Number: NCT07705035

DBC-664 in Adult Patients With Solid Tumors

DBC-664-ONC-101 is a first-in-human Phase 1a/1b open-label, multicenter study to evaluate the safety, tolerability, PK, pharmacodynamic, and preliminary anti-tumor activity of DBC-664 in patients with endometrial cancer, ovarian cancer, and other advanced solid tumors . This study is divided into 2 parts: Phase-1a Dose Escalation (Part 1), and Phase-1b Dose Expansion (Part 2). In each part, patients who meet specific eligibility criteria will be enrolled.

Recruiting

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Key information

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Must be ≥18 years of age at the time consent is signed.
  • Has a histologically or cytologically confirmed unresectable recurrent locally advanced or metastatic solid tumor
  • Has measurable disease per RECIST v1.1 (or mRECIST 1.1 for patients with pleural mesothelioma), as assessed by the local site Investigator/radiology.

Exclusion criteria

  • Has a diagnosis of immunodeficiency.
  • Has had a prior stem cell, bone marrow, or organ transplant.
  • Has a known history of human immunodeficiency virus (HIV) infection.
  • Has active or chronic hepatitis B virus (HBV), or hepatitis C virus (HCV) infection.
  • Has an active autoimmune disease (non-immunotherapy induced conditions) that has required systemic treatment in the past 2 years (ie, with use of disease modifying agents, corticosteroids, or immunosuppressive drugs).
  • Has a history of (noninfectious) pneumonitis that required steroids or current active pneumonitis/interstitial lung disease.
  • Has symptomatic visceral spread of disease that poses a risk of life-threatening complications in the short term, per Investigator's opinion (including massive uncontrolled effusions [pleural, pericardial, peritoneal], pulmonary lymphangitis, and over 50% liver involvement).
  • Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis. Individuals with previously treated CNS metastases may participate provided they are radiologically stable (ie, without evidence of progression for at least 2 weeks by repeat imaging [note that the repeat imaging should be performed during study Screening]), clinically stable, and without requirement of steroid treatment for at least 14 days prior to first dose of study treatment.
  • Has a history of a previous secondary malignancy within 3 years of Screening (except basal cell or squamous cell carcinoma of the skin or carcinoma in situ treated with curative therapy or other localized, low-grade tumors deemed cured, or whose natural history does not have the potential to interfere with the safety or efficacy assessments of the current study and not treated with systemic anticancer therapy [except hormonal therapy]).
  • Has a known psychiatric or substance abuse disorder that would interfere with the individuals' ability to cooperate with the requirements of the study.

Treatment and study plan

DBC-664

Biological

DBC-664 will be administered intravenously.

Primary outcomes

  1. Safety and Tolerability

    Time frame: 2 years

    The safety and tolerability of DBC-664 in patients with solid tumor measured by frequency and severity of treatment-emergent adverse events (TEAEs), serious adverse events (SAEs), dose-limiting toxicities (DLTs), adverse events of special interest (AESIs), adverse events (AEs) leading to dose interruption and of adverse events (AEs) leading to treatment discontinuation

  2. Determine Recommended Dose for Expansion

    Time frame: 1 year

    To determine the maximum tolerated dose (MTD) and/or select the recommended dose(s) for expansion (RDE[s]) of DBC-664

  3. Characterize Pharmacokinetics

    Time frame: 2 years

    To characterize the pharmacokinetics (PK) of DBC-664 with Cmax following administration

Study contacts

Contact information is provided by the study sponsor or research team.

Sponsors and collaborators

Lead sponsor

Duboce Biopharmaceuticals, Inc.

Industry

Registry information

Official study title

A Phase 1a/1b Open Label, Multicenter, Dose Escalation and Dose Expansion Study of the Safety, Pharmacokinetics, Pharmacodynamics, and Activity of DBC-664 in Adult Patients With Locally Advanced or Metastatic Solid Tumors

Important dates

Study start
2026
Primary completion
2030
Study completion
2030
First posted
Jul 15, 2026
Registry last updated
Jul 23, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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