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Clinical Trial Summary

This is a Phase 2, multicenter, two-stage, open-label, parallel-group study designed to evaluate the efficacy and safety of XmAb20717 in patients with selected advanced gynecologic and genitourinary malignancies.


Clinical Trial Description

This is a Phase 2, multicenter, two-stage, open-label, parallel-group study designed to evaluate the efficacy and safety of XmAb20717 in patients with selected advanced gynecologic and genitourinary malignancies and to identify tumor types for further evaluation. In Stage 1, subjects will be enrolled into 1 of 5 tumor-specific, parallel cohorts (n = 10 each): - Platinum-resistant high-grade serous ovarian cancer (HGSOC) - Chemotherapy relapsed or refractory clear cell ovarian, endometrial, or peritoneal cancer - Immune-checkpoint-inhibitor-refractory microsatellite stable (MSS) endometrial cancer (EC) - Previously treated recurrent or metastatic cervical cancer - High-risk metastatic castration-resistant prostate cancer (mCRPC) Within each tumor-specific cohort in Stage 1, a primary endpoint of ORR at 12 weeks, based on investigator review, will be used to determine cohort expansion into Stage 2. Each Stage 1 cohort that achieves an ORR of ≥ 20% (at least 2 out of 10 subjects with an objective response) will enroll up to an additional 20 subjects in Stage 2. Cohorts with an ORR of less than 20% will discontinue enrollment. However, additional factors will be considered in determining an expansion into Stage 2 (eg, enrollment rate, complete versus partial response, and DOR). ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05032040
Study type Interventional
Source Xencor, Inc.
Contact Barbara Hickingbottom, MD
Phone 858-480-3413
Email [email protected]
Status Not yet recruiting
Phase Phase 2
Start date December 31, 2021
Completion date August 31, 2023

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