XmAb20717 in Advanced Biliary Tract Cancers

NCT05297903 | Active Not Recruiting Phase 2 FDA Drug

• 2 other identifiers: UPCC 17221IRB#850515
• Study Type: interventional
• Target: 27
• Locations: 1 country
• Sites: 1

Brief Summary

This is a single-arm, phase II clinical trial to evaluate the efficacy of XmAb20717 in patients with advanced biliary tract cancers who have progressed on, or were intolerant of, a gemcitabine-based chemotherapy regimen.

Conditions

Biliary Tract Cancer

Outcome Measures

Primary Outcomes (1)

• Objective Response Rate (ORR)

  Proportion of participants with the best response being complete response (CR) or partial response (PR)

  From therapy initiation, assessed at each restaging scan, for up to 24 months

Secondary Outcomes (4)

• Progression-free survival

  From therapy initiation until progression or death, whichever comes first, for up to 60 months

• Overall survival

  From therapy initiation until death, for up to 60 months

• Objective Response Rate (ORR) in patients that received prior immunotherapy

  From therapy initiation, assessed at each restaging scan, for up to 24 months

• Objective Response Rate (ORR) in patients who did not received prior immunotherapy

  From therapy initiation, assessed at each restaging scan, for up to 24 months

Study Arms (1)

XmAb20717

EXPERIMENTAL

Study participants will receive the recommended phase II dose (10mg/kg) of XmAb20717 by intravenous infusion on days 1 and 15 of a 28-day cycle for up to 2 years.

Drug: XmAb20717

Interventions

XmAb20717 DRUG

10mg/kg IV

Also known as: ANTI-PD1 × ANTI-CTLA4 BISPECIFIC MONOCLONAL ANTIBODY

XmAb20717

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Provision of signed and dated informed consent form
• Stated willingness to comply with all study procedures and availability for the duration of the study
• Male or female, aged \> 18 years of age
• Patient must have advanced biliary tract cancers (BTC) including intrahepatic, perihepatic, or extrahepatic cholangiocarcinoma or gallbladder carcinoma with histologic or cytologic confirmation who have experienced progression, or intolerance of, systemic therapy with a gemcitabine-based regimen.
• Patients with tumors harboring an FGFR2 fusion, NTRK fusion, or IDH1 mutation must have received molecularly targeted therapy unless contraindicated or refused. Patients without sequencing results for FGFR2 fusions, NTRK fusions, or IDH1 mutations at the time of screening are permitted to enroll in the study. If sequencing results demonstrating FGFR2 fusions, NTRK fusions, or IDH1 mutations become available after patients have enrolled on the study, patients will be informed of the results and available treatment options but may continue study treatment if they are deriving clinical benefit
• ECOG performance status of 0 or 1.
• Measurable or evaluable disease as defined by RECIST v. 1.1.
• Available archival tissue or willingness to undergo biopsy during the screening period; this requirement can be waived if biopsy deemed infeasible or unsafe by the principal investigator.
• For females of reproductive potential: Must have a negative serum pregnancy test performed within 7 days of first study treatment and must agree to use such a method during study participation and for an additional 3 months after the last study dose of XmAb20717. Reproductive potential is defined in section 8.2.11.
• For males of reproductive potential with female partners of reproductive potential (per section 8.2.11): Must use of condoms or other methods to ensure effective contraception with partner during the study and for an additional 4 weeks after the end of XmAb20717 administration as outlined in section 8.2.11. Male subjects must agree not to donate sperm from screening through 4 weeks after completion of study
• Must have adequate organ and hematopoietic function within 14 days of the start of study treatment as defined in Table 1. Labs from cycle 1 day 1 may be used for eligibility.

You may not qualify if:

• Any concurrent condition requiring the continued or anticipated use of systemic steroids beyond physiologic replacement dosing (excluding non-systemic inhaled, topical skin, nasal, and/or ophthalmic corticosteroids). All other systemic corticosteroids above physiologic replacement dosing must be discontinued at least four weeks prior to first study treatment.
• Treatment with another investigational drug or other intervention within four weeks prior to the first study treatment date.
• Treatment with trans-arterial liver embolization, hepatic arterial infusion, or radiation doses of \> 30 Gy within 4 weeks prior to the first study treatment date
• Treatment with chemotherapy within 3 weeks prior to the first study treatment date
• History of permanent discontinuation of a PD-1 or PD-L1 inhibitor therapy due to an immune related adverse event.
• Prior treatment with a CTLA-4 inhibitor
• Pregnant or breastfeeding
• Known allergic reactions to study drug components.
• Active brain metastases. Patients with brain metastases must have stable neurological status following local therapy (surgery or radiation) for at least four weeks prior to first study treatment and must be off steroids related to the brain metastases.
• for at least two weeks prior to study treatment.
• Active drug or alcohol use or dependence as documented in the chart that, in the opinion of the investigator, would interfere with adherence to study requirements.
• Active bacterial, viral, parasitic, or fungal infection requiring IV therapy within 2 weeks of the start of protocol treatment.
• A secondary primary malignancy that, in the judgment of the investigator, may affect the interpretation of results.
• Prior organ allograft or allogeneic bone marrow transplantation.
• A history of, or active, pneumonitis or interstitial lung disease.

Sponsors & Collaborators

• Abramson Cancer Center at Penn Medicine: lead
• Xencor, Inc.: collaborator

Study Sites (1)

Abramson Cancer Center at University of Pennsylvania

Philadelphia, Pennsylvania, 19104, United States

Location

MeSH Terms

Conditions

Biliary Tract Neoplasms

Condition Hierarchy (Ancestors)

Digestive System Neoplasms; Neoplasms by Site; Neoplasms; Biliary Tract Diseases; Digestive System Diseases

Study Officials

• Mark O'Hara, MD

  Abramson Cancer Center at Penn Medicine

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 17, 2022
• First Posted: March 28, 2022
• Study Start: April 11, 2022
• Primary Completion (Estimated): December 2, 2026
• Study Completion (Estimated): December 2, 2026
• Last Updated: September 15, 2025

Record last verified: 2025-09

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)