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A Study of Azenosertib (ZN-c3) in Subjects With Platinum-Resistant High-Grade Serous Ovarian, Fallopian Tube or Primary Peritoneal Cancer

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment310 people
  • Recruiting US sites34
  • SponsorK-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc
  • RegistryNCT05128825

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

A Study of Azenosertib (ZN-c3) in Subjects With Platinum-Resistant High-Grade Serous Ovarian, Fallopian Tube or Primary Peritoneal Cancer: a one-minute explainerNCT051288251 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age18 Years to no maximum
  • SexFemale
  • Healthy volunteersNo

You may be able to join if

  • Age ≥18 years
  • High-grade serous ovarian, fallopian tube or primary peritoneal cancer
  • Tumor testing (archival acceptable) confirms a positive Cyclin E1 protein status result determined by IHC using the Sponsor's investigational clinical trial assay
  • Prior therapy:
  • Subjects must have platinum-resistant disease
  • Part 2c: Subjects with PROC may have 1 to 4 prior lines or regimens. Prior treatment in this cohort includes a weekly taxane regimen, either as single agent or in combination, per protocol
  • Prior bevacizumab treatment is required, if eligible per standard of care
  • Prior PARP inhibitor treatment is required if BRCA 1/2 mutation or HRD, if eligible per standard of care
  • Prior mirvetuximab treatment is required, if eligible per standard of care
  • Measurable disease per RECIST Version 1.1.
  • Adequate hematologic and organ function, as defined in protocol
  • ECOG 0-1

You cannot join if

  • Primary platinum-refractory disease
  • Subjects with endometrioid, clear cell, mucinous, or sarcomatous histology, mixed tumors containing any of the above histologies, low-grade, borderline, or other ovarian tumors
  • Any of the following treatment interventions within the specified time frame prior to C1D1:
  • Major surgery within 28 days
  • Hospitalization within 14 days
  • Any chemotherapy or targeted tumor therapy within 21 days or 5 half-lives (whichever is shorter);
  • Radiation therapy within 21 days;
  • Autologous or allogeneic stem cell transplant within 3 months.
  • Current use of any other investigational drug therapy <28 days or 5 half-lives (whichever is shorter).
  • Inability to discontinue treatment prescription or non-prescription drugs, or to discontinue consumption of food and herbal supplements that are strong or moderate CYP3A inhibitors and inducers or P-gp inhibitors at least 14 days prior to C1D1.
  • Prior therapy with ZN-c3 or any other WEE1 inhibitor, ATR inhibitor, PKMYT1 inhibitor, or CHK1/2 inhibitor.
  • A serious illness or medical condition(s) including, but not limited to:
  • Clinically or radiographically unstable brain metastases or leptomeningeal disease that requires immediate treatment. Subjects with asymptomatic brain metastases are eligible.
  • Myocardial impairment resulting in heart failure (NYHA Class II-IV)
  • Severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase risk associated with study participation or may interfere with interpretation of study results
  • Acute kidney injury requiring intervention or intravenous fluid in the last 14 days or presence of indwelling urinary catheter or percutaneous nephrostomy.
  • Significant gastrointestinal abnormalities, including an inability to take oral medication, requirement for intravenous alimentation, active peptic ulcer, chronic diarrhea or vomiting considered to be clinically significant in the judgment of the Investigator, or prior surgical procedures affecting absorption.
  • Active, uncontrolled infection. Subjects with an infection receiving treatment (antibiotic, antifungal, or antiviral) must have completed such treatment and the infection must be considered controlled/resolved (and afebrile) by the Investigator for at least 7 days before C1D1
  • Any evidence of bowel obstruction as determined by air/fluid levels on computed tomography (CT scan, recent hospitalization for small bowel obstruction within 3 months prior to C1D1, or recurrent paracentesis or thoracentesis within 6 weeks prior to C1D1.
  • Unresolved toxicity of Grade >1 attributed to any prior therapies (excluding Grade ≤2 neuropathy, alopecia, or skin pigmentation).
  • Pregnant or lactating female subject or female subject of childbearing potential who has a positive serum pregnancy test within 14 days prior to C1D1.
  • History of another malignancy in the previous 2 years, unless cured by surgery alone and continuously disease free. Exceptions include appropriately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, Stage 1 uterine cancer, or other malignancies with an expected curative outcome.
  • Subjects who are known to be immunocompromised or HIV-positive on highly active anti-retroviral therapy.
  • Subjects with known active hepatitis B or hepatitis C infection.
  • Individuals who are judged by the Investigator to be unsuitable as study subjects.
  • Subjects who had prior wide-field radiotherapy affecting ≥ 20% of the bone marrow.

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

Treatments listed in the registry

  • azenosertib (Drug): Azenosertib (ZN-c3) will be administered orally.

The study

Treatment groups

Randomized · Parallel · masking: None

Part 1a/1b (Completed Enrollment) (Experimental)

Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule.

Part 2a: Arm 1 (Completed Enrollment) (Experimental)

Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule

Part 2a: Arm 2 (Completed Enrollment) (Experimental)

Azenosertib 300mg administered once daily on a 5 days on, 2 days off intermittent schedule

Part 2b (Completed Enrollment) (Experimental)

Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule

Part 2c (Enrolling) (Experimental)

Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule

Goals

What the study measures

Main goals

  • Objective Response Rate (ORR) defined by RECIST v1.1 [Part 2] (Up to approximately 12 months from the enrollment of the last subject)

Other goals

  • Duration of response (DOR) defined by RECIST v1.1 [Part 2]
  • Progression free survival (PFS) defined by RECIST v1.1 [Part 2]
  • Clinical Benefit Rate (CBR) defined by RECIST v1.1 [Part 2]
  • CA-125 response by GCIG criteria [Part 2]
  • Number of Subjects experiencing treatment emergent adverse events (TEAEs) [Part 2]

Planned enrollment: 310 (estimated).

Where

Recruiting US sites

  • Site 0170-USA Mitchell Cancer Institute, Mobile, Alabama
  • Site 0143 - HonorHealth, Phoenix, Arizona
  • Site 0102 - University of Arizona Cancer Center, Tucson, Arizona
  • Site 0135 - Rocky Mountain Cancer Centers, Lone Tree, Colorado
  • Site 0158 - Hartford HealthCare, Hartford, Connecticut
  • Site 0241 - Florida Cancer Specialist - North, Altamonte Springs, Florida
  • Site 0173 - Mount Sinai Medical Center, Miami Beach, Florida
  • Site 0308 - Advent Health, Orlando, Florida
  • Site 0239 - Florida Cancer Specialists - East, Wellington, Florida
  • Site 0108 - Emory University Hospital, Atlanta, Georgia
  • Site 0284 - Community Cancer Center North, Indianapolis, Indiana
  • Site 0217 - St Vincent Hospital and Health Care Centers, Indianapolis, Indiana
  • Site 0251 - Norton Cancer Institute, Louisville, Kentucky
  • Site 0221 - Tufts Medical Center - PPDS, Boston, Massachusetts
  • Site 0104 - Dana Farber Cancer Institute, Boston, Massachusetts
  • Site 0307 - Lahey Hospital and Medical Center, Burlington, Massachusetts
  • Site 0263 - Baystate Medical Center, Springfield, Massachusetts
  • Site 0101 - Barbara Ann Karmanos Cancer Institute, Detroit, Michigan
  • Site 0228 - Corewell Health Medical Group West, Grand Rapids, Michigan
  • Site 0288 - Minnesota Oncology Hematology - Maplewood, Maplewood, Minnesota
  • Site 0213 - Center of Hope, Reno, Nevada
  • Site 0126 - Wilmot Cancer Center, Rochester, New York
  • Site 0259 - Duke Cancer Center, Durham, North Carolina
  • Site 0147 - Trihealth Cancer Institute - Harold and Eugen, Cincinnati, Ohio
  • Site 0243 - Mark H Zangmeister Cancer Center, Columbus, Ohio
  • Site 0214-Ohio State University Comprehensive Cancer Center, Hilliard, Ohio
  • Site 0316 - Willamette Valley Cancer Institute/Oncology Associates of Oregon, Eugene, Oregon
  • Site 0232 - University of Pennsylvania, Philadelphia, Pennsylvania
  • Site 0178 - Thomas Jefferson University, Philadelphia, Pennsylvania
  • Site 0132 - Avera Cancer Institute, Sioux Falls, South Dakota
  • Site 0103 - University of Texas MD Anderson Cancer Center, Houston, Texas
  • Site 0203 - Texas Oncology, Tyler, Texas
  • Site 0295 - Virginia Oncology Associates, Chesapeake, Virginia
  • Site 0322 - Inova Schar Cancer Institute, Fairfax, Virginia

46 recruiting sites outside the US. Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Sep 28, 2026. Public record; not medical advice.

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