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A Study of Azenosertib (ZN-c3) Versus Investigator's Choice Chemotherapy in Subjects With Platinum-Resistant High-Grade Serous Ovarian, Primary Peritoneal, or Fallopian Tube Cancers Positive for Cyclin E1 Protein Expression

A Randomized, Open-Label Phase 3 Study of Azenosertib Versus Investigator's Choice of Chemotherapy in Platinum-Resistant High-Grade Serous Ovarian, Primary Peritoneal, or Fallopian Tube Cancers Positive for Cyclin E1 Protein Expression

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07546500
Acronym
ASPENOVA
Enrollment
420
Registered
2026-04-22
Start date
2026-04-17
Completion date
2030-04-30
Last updated
2026-05-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ovarian Cancer

Keywords

Platinum-Resistant Ovarian Cancer (PROC), OvCa

Brief summary

This is a randomized, Phase 3 trial designed to evaluate the efficacy and safety of azenosertib compared to Investigator's choice of chemotherapy in subjects with platinum-resistant ovarian cancer whose tumors are positive for cyclin E1 protein expression.

Detailed description

A Phase 3 study to evaluate the efficacy, safety, and overall clinical benefit of azenosertib (ZN-c3) compared with Investigator's choice of chemotherapy in subjects with Platinum-Resistant, High-Grade Serous Ovarian, Fallopian Tube, or Primary Peritoneal Cancer. Azenosertib is a selective and orally bioavailable inhibitor of WEE1. In HGSOC, high Cyclin E1 protein drives replication stress and increases tumor reliance on WEE1-mediated G2/M checkpoint control. Treating tumor cells with azenosertib promotes premature cell cycle progression leading to increased replication stress and accumulation of DNA damage pushing cells to mitotic catastrophe resulting in tumor cell death.

Interventions

The investigator will select the chemotherapy in accordance with the protocol defined requirements. The possible choices as defined by the protocol: * Paclitaxel * Gemcitabine * Pegylated liposomal doxorubicin (PLD) * Topotecan The selected chemotherapy will be administered intravenously

Azenosertib 400 mg will be administered orally.

Sponsors

K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc
Lead SponsorINDUSTRY
European Network of Gynaecological Oncological Trial Groups (ENGOT)
CollaboratorOTHER
GOG Foundation
CollaboratorNETWORK

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Female age ≥ 18 years 2. High-grade serous epithelial ovarian, primary peritoneal, or fallopian tube cancer 3. Measurable disease per RECIST Version 1.1 4. Eastern Cooperative Oncology Group (ECOG) performance status score 0-1 5. The subject's tumor tissue must be positive for cyclin E1 protein expression per the Sponsor's clinically validated cyclin E1 IHC investigational, in vitro diagnostic assay 6. Prior Therapy: 1. Subject must have platinum-resistant disease 2. One to 3 prior lines or regimens are allowed (1 to 4 prior lines are permitted, if prior mirvetuximab) 3. Prior bevacizumab treatment is required, if eligible per standard of care 4. Prior PARP inhibitor treatment is required if BRCA 1/2 mutation or HRD, if eligible per standard of care 5. Prior mirvetuximab treatment is required, if eligible per standard of care 7. Adequate hematologic and organ function during the screening period

Exclusion criteria

1. 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, nonmelanoma skin carcinoma, Stage 1 uterine cancer, or other malignancies with an expected curative outcome. 2. Subjects with primary platinum-refractory disease. 3. Prior therapy with azenosertib or any other WEE1 inhibitor, ATR inhibitor, CHK1/2 inhibitor, or (PKMYT1) inhibitor for PROC. 4. A serious illness or medical condition(s) including, but not limited to, the following: 1. Clinically or radiographically unstable brain metastases or leptomeningeal disease that requires immediate treatment. Subjects with asymptomatic brain metastases are eligible. 2. Acute kidney injury requiring intervention, or presence of indwelling urinary catheter or percutaneous nephrostomy. 3. Significant gastrointestinal abnormalities, including an inability to take oral medication, requirement for IV 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. 4. Any evidence of small bowel obstruction as determined by air/fluid levels on computed tomography (CT) scan, recent hospitalization for small bowel obstruction within 3 months before randomization, or recurrent paracentesis or thoracentesis within 6 weeks before randomization. 5. 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 randomization 6. Myocardial impairment of any cause resulting in heart failure by New York Heart Association criteria (Class II, III or IV). 7. Medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or may interfere with the interpretation of study results 5. Any of the following treatment interventions within the specified time frame before randomization: 1. Hospitalization within 14 days 2. Major surgery within 28 days 3. Any chemotherapy or targeted tumor therapy within 21 days or 5 half-lives (whichever is shorter) 4. Radiation therapy within 21 days 5. Autologous or allogeneic stem cell transplant within 3 months 6. Current use of any other investigational drug therapy \< 28 days or 5 half-lives (whichever is shorter) 6. Inability to discontinue treatment with prescription or nonprescription drugs that are prohibited per protocol. 7. Inability to discontinue consumption of food and herbal supplements that are prohibited per protocol 8. Prior wide-field radiotherapy affecting ≥ 20% of the bone marrow. 9. Unresolved toxicity of Grade \> 1 attributed to any prior therapies (excluding Grade ≤ 2 neuropathy, alopecia, or skin pigmentation). 10. Subjects who are immunocompromised or HIV-positive on highly active anti-retroviral therapy 11. Subjects with known active hepatitis B or hepatitis C infection 12. Individuals who are judged by the Investigator to be unsuitable as study subjects

Design outcomes

Primary

MeasureTime frameDescription
Progression free survival (PFS) per RECIST v1.1 as assessed by InvestigatorUp to approximately 24 months from the enrollment of the last subjectTime from randomization to the first documented tumor progression (per RECIST v1.1) or death from any cause, whichever occurs first.

Secondary

MeasureTime frameDescription
Overall survivalUp to approximately 24 months from the enrollment of the last subjectTime from randomization until death due to any cause
PFS per RECIST 1.1 as assessed by blinded independent central review (ICR)Up to approximately 24 months from the enrollment of the last subjectTime from randomization to the first documented tumor progression (per RECIST v1.1) or death from any cause, whichever occurs first.
Objective Response Rate (ORR) per RECIST v1.1 and assessed by InvestigatorUp to approximately 24 months from the enrollment of the last subjectProportion of patients who attain a partial response (PR) or complete response (CR) per RECIST v1.1
Change from baseline in European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire score (EORTC QLQ)-Core 30 (C30) at each post baseline visitUp to approximately 24 months from the enrollment of the last subjectAssess changes over time in cancer-specific and patient-reported outcome instruments assessing global health status/quality of life, functional domains, and symptom burden.
Change from baseline in European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire score (EORTC QLQ)-OV28 at each post baseline visitUp to approximately 24 months from the enrollment of the last subjectAssess changes over time in cancer-specific and patient-reported outcome instruments assessing global health status/quality of life, functional domains, and symptom burden.
Change from baseline in EQ-5D-5L score at each post baseline visitUp to approximately 24 months from the enrollment of the last subjectAssess changes over time in cancer-specific and patient-reported outcome instruments assessing global health status/quality of life, functional domains, and symptom burden.
Number of Subjects experiencing treatment emergent adverse events (TEAEs)Up to approximately 24 months and 30 days from the enrollment of the last subjectAssess adverse events occurring for the first time or worsening of a pre-existing event during the treatment period until 30 days after the last dose of study drug

Countries

Australia, Belgium, Canada, France, Germany, Ireland, Italy, Poland, South Korea, Spain, Taiwan, United States

Contacts

CONTACTProject Director
medicalaffairs@zentalis.com858.263.4333

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 20, 2026