Safety and tolerability of XmAb541 in patients with advanced solid tumors
Official title: A Phase 1, First-in-Human, Dose Escalation and Expansion Study to Evaluate the Safety and Tolerability of XmAb541 in Advanced Solid Tumors
Run by Xencor, Inc. · NCT06276491 · Data updated 2026-11-12
This study is testing a new drug called XmAb541 to see if it's safe and how well it works for people with advanced solid tumors like ovarian and endometrial cancer.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 15 Years and up |
| Sex | All |
| Enrollment | 282 (estimated) |
| Sponsor | Xencor, Inc. Industry-sponsored |
| Drugs / interventions | prednisone |
| Locations | 27 sites (Duarte, California and 26 other locations) |
| Status | Recruiting |
| Started | April 4, 2024 |
| Main results expected | December 2027 |
| Study ends | December 2028 |
| Registry record updated | October 9, 2026 |
| Trial ID | NCT06276491 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are adults aged 18 and older with CLDN6+ tumors who have exhausted standard therapies and have documented progressive disease.
✕Probably not a fit
Patients with platinum refractory ovarian cancer or those who have previously been treated with a CLDN6 targeting product may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial evaluates the safety and tolerability of the investigational drug XmAb541 in patients with advanced solid tumors, specifically targeting ovarian cancer, endometrial cancer, and various germ cell tumors. The study aims to determine the optimal and safe dosage of XmAb541 while assessing its effects on tumor outcomes. Participants will be closely monitored for any adverse effects and overall response to the treatment.
Why it matters
Potential benefit: If successful, this study could provide a new treatment option for patients with advanced solid tumors that are difficult to treat.
How similar studies have gone: While this approach is novel in targeting CLDN6, similar studies targeting other tumor markers have shown promise in treating advanced cancers.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: * Age ≥ 18 years. For US only: subjects with GCTs, age ≥15 years * CLDN6+ tumor * Histological or cytological documentation of locally advanced, recurrent, or metastatic ovarian, fallopian tube, or peritoneal cancer, adenocarcinoma of the endometrium (endometrial cancer, uterine cancer, or carcinoma of the uterine corpus), GCT resistant to previous treatment * Adequate Eastern Cooperative Oncology Group performance status * Life expectancy ≥ 3 months * Adequate liver, kidney, and bone marrow function Key Exclusion Criteria: * Participants with untreated brain metastases are excluded. Participants with treated brain metastases may participate, provided they are radiologically stable. * Active known or suspected autoimmune disease * Have any condition requiring systemic treatment with corticosteroids, prednisone equivalents, or other immunosuppressive medications within 14 days prior to first dose of study drug * Clinically significant cardiovascular, pulmonary or gastrointestinal disease * Active hepatitis B or hepatitis C
Where it's running
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City of Hope
Duarte, California, United States Recruiting -
Stanford University
Palo Alto, California, United States Recruiting -
University of California San Francisco
San Francisco, California, United States Recruiting -
Moffitt Cancer Center
Tampa, Florida, United States Recruiting -
Winship Cancer Institute, Emory University
Atlanta, Georgia, United States Recruiting -
University of Chicago Medical Center
Chicago, Illinois, United States Recruiting
Show 21 more locations
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Indiana University Melvin and Bren Simon Comprehensive Cancer Center
Indianapolis, Indiana, United States Recruiting -
Karmanos Cancer Institute
Detroit, Michigan, United States Recruiting -
University of Minnesota
Minneapolis, Minnesota, United States Recruiting -
The John Theurer Cancer Center at Hackensack University Medical Center
Hackensack, New Jersey, United States Recruiting -
Icahn School of Medicine at Mount Sinai
New York, New York, United States Recruiting -
Montefiore Einstein Comprehensive Cancer Center
The Bronx, New York, United States Recruiting -
The Ohio State University
Columbus, Ohio, United States Recruiting -
OU Health Stephenson Cancer Center
Oklahoma City, Oklahoma, United States Recruiting -
UPMC Hillman Cancer Center
Pittsburgh, Pennsylvania, United States Recruiting -
SCRI Oncology Partners
Nashville, Tennessee, United States Recruiting -
University of Virginia
Charlottesville, Virginia, United States Recruiting -
AZ Groeninge
Kortrijk, Belgium Recruiting -
UZ Leuven
Leuven, Belgium Recruiting -
CHU de Liege
Liège, Belgium Recruiting -
Herlev Gentofte Hospital
Herlev, Denmark Recruiting -
Centre Hospitalier Lyon-Sud
Pierre-Bénite, France Recruiting -
NEXT Oncology - Hospital Quironsalud
Barcelona, Spain Recruiting -
Clinical Universidad de Navarra
Madrid, Spain Recruiting -
NEXT Oncology - Hospital Quironsalud
Madrid, Spain Recruiting -
Clinical Universidad de Navarra
Pamplona, Spain Recruiting -
The Christie NHS Foundation Trust
Manchester, United Kingdom Recruiting
Study contacts
- Study coordinator: XmAb541-01 Central Contact
- Email: info541-01@xencor.com
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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CR-002 study in adults with advanced solid tumors
This trial tests CR-002 as a single therapy to see if it is safe and tolerable in adults with locally advanced or metastatic solid tumors
-
Methylation markers in self-samples to help detect gynecological cancers
This study tests whether self-collected urine and vaginal samples can reveal DNA methylation or other genetic markers that indicate endometrial, ovarian, vulvar, or vaginal cancers in women who are at risk or have postmenopausal bleeding.
-
Radiotherapy for gynecologic cancer with up to 10 metastatic sites
This registry follows adults with gynecologic cancer who have 1 to 10 active metastatic lesions and are treated with radiotherapy as part of routine care to see how such treatments work in real-world settings.
-
Stellate ganglion block and dexmedetomidine for better sleep after gynecologic laparoscopy
The study tests whether giving a preoperative stellate ganglion block plus intraoperative dexmedetomidine improves sleep after laparoscopic gynecologic surgery in women.
-
TS-104: a first-in-human, dose-escalation study for advanced solid tumors
This study tests TS-104, a peptide-drug conjugate, as a single therapy in adults with advanced solid tumors like NSCLC, HNSCC, esophageal, gastric, ovarian, or endometrial cancer to see if it is safe and tolerable and whether it shows any benefit.
-
ARR-002 in advanced ovarian or endometrial cancer
This phase 1 study tests ARR-002 to see if it is safe and tolerable in adults with advanced or metastatic ovarian or endometrial cancer who have limited treatment options.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.