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A Study of Azenosertib (ZN-c3) in Women With Recurrent or Persistent Uterine Serous Carcinoma

A Phase 2 Open-Label, Multicenter Study to Evaluate Efficacy and Safety of ZN-c3 in Adult Women With Recurrent or Persistent Uterine Serous Carcinoma

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04814108
Enrollment
92
Registered
2021-03-24
Start date
2021-07-28
Completion date
2025-10-22
Last updated
2026-03-18

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

Conditions

Uterine Serous Carcinoma

Keywords

uterus, uterine, endometrial, endometrium, serous carcinoma, wee1, Wee-1, usc, Uterine Serous Carcinoma, serous

Brief summary

This is a Phase 2 study to evaluate the clinical activity and safety of ZN-c3 (azenosertib) in adult women with recurrent or persistent uterine serous carcinoma (USC).

Detailed description

This is a Phase 2 open-label, multicenter study to evaluate the clinical activity and safety of ZN-c3 (also known as azenosertib; KP-2638) in adult women with recurrent or persistent uterine serous carcinoma (USC).

Interventions

Azenosertib is an investigational drug.

Sponsors

K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

1. Females ≥18 years of age at the time of informed consent. 2. Histologically confirmed recurrent or persistent USC for which no other proven effective treatment options are available or any available standard of care therapy was not tolerated or was refused by the subject. * Subjects with endometrial carcinoma of mixed histology where the serous component comprises at least 5% of the tumor will be considered eligible. * Subjects with carcinosarcomas (even if there is a serous component) are not eligible. 3. Measurable disease per RECIST Guideline Version 1.1 4. Required prior therapy for endometrial cancer: 1. Treatment with a platinum-based chemotherapy regimen. 2. Treatment with a PD-(L)1 inhibitor 3. Known HER2-positive tumors: Treatment with at least 1 HER2-targeted therapy, except for subjects who are not clinically eligible. 5. Adequate hematologic and organ function

Exclusion criteria

1. Any of the following treatment interventions within the specified time frame prior to C1D1: 1. Major surgery within 28 days 2. Any chemotherapy or targeted tumor therapy within 14 days or 5 half-lives (whichever is shorter). 3. Radiation therapy within 21 days; 4. Autologous or allogeneic stem cell transplant within 3 months. 5. Current use of any other investigational drug therapy \<28 days or 5 half-lives (whichever is shorter). 2. Prior therapy with ZN-c3 or any other WEE1 inhibitor, ATR inhibitor, or CHK1/2 inhibitor for USC. 3. A serious illness or medical condition(s) including, but not limited to: Any evidence of bowel obstruction as determined by air/fluid levels on computed tomography (CT) scan, recent hospitalization for bowel obstruction within 3 months prior to C1D1, or recurrent paracentesis or thoracentesis within 6 weeks prior to C1D1.

Design outcomes

Primary

MeasureTime frameDescription
Frequency and severity of TEAEs2 yearsTo determine the safety and tolerability of ZN-c3 in subjects with recurrent or persistent USC.
Objective Response Rate as defined by the revised RECIST v1.1 as assessed by ICR2 yearsTo investigate the antitumor activity of ZN-c3 in subjects with recurrent or persistent USC

Secondary

MeasureTime frameDescription
Objective Response Rate as defined by the revised RECIST v1.1. and assessed by ICR and the Investigator.2 yearsTo investigate the antitumor activity of ZN-c3 in subjects with recurrent or persistent USC at different doses/schedules
Duration of Response as defined by the revised RECIST v1.1. and assessed by ICR and the Investigator.2 yearsTo investigate the antitumor activity of ZN-c3 in subjects with recurrent or persistent USC at different doses/schedules
Progression Free Survival as defined by the revised RECIST v1.1. and assessed by ICR and the Investigator.2 yearsTo investigate the antitumor activity of ZN-c3 in subjects with recurrent or persistent USC at different doses/schedules
Clinical Benefit Rate as defined by the revised RECIST v1.1. and assessed by ICR and the Investigator.2 yearsTo investigate the antitumor activity of ZN-c3 in subjects with recurrent or persistent USC at different doses/schedules
Time To Response as defined by the revised RECIST v1.1. and assessed by ICR and the Investigator.2 yearsTo investigate the antitumor activity of ZN-c3 in subjects with recurrent or persistent USC at different doses/schedules

Countries

Australia, Canada, Georgia, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 19, 2026