About this trial
The purpose of this study is to assess the safety and tolerability of XmAb®819 administered intravenous (IV) or subcutaneous (SC) in subjects with relapsed or refractory clear cell renal cell carcinoma and to identify the minimum safe and biologically active dose and the recommended dose (RD).
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Subjects must have measurable disease by Response Evaluation Criteria in Solid Tumors (RECIST 1.1) as assessed by the local site investigator. Lesions situated in a previously irradiated area are considered measurable if progression has been demonstrated in such lesions.
Subjects who have relapsed and refractory ccRCC, pRCC, NSCLC, and CRC with evidence of disease progression on standard-of-care therapies
ECOG performance status of 0 or 1.
All subjects must have adequate tumor sample available (slides or archival FFPE blocks)
Disqualifiers
Prior treatment with an investigational anti-ENPP3/CD203c therapy
History of serious allergic or anaphylactic/hypersensitivity reaction to monoclonal antibody therapy
Systemic antineoplastic therapy within 5 half-lives on the first dose of study treatment.
Failure to recover from any clinically significant toxicity related to previous anticancer treatment
Trial design
Sequential
Treatments tested in this trial
XmAb819
Biological/VaccineMonoclonal Bispecific Antibody
Treatment groups
Trial outcomes
Primary outcomes
Incidence of treatment-emergent adverse events (safety and tolerability of XmAb819)
Safety and tolerability as assessed by incidence of TEAEs; incidence of clinically significant changes in safety laboratory tests, PE findings, vital signs, and ECGs; incidence and severity of CRS
Incidence of dose limiting toxicities (DLTs)
Safety and tolerability as assessed by incidence of DLTs and all available data which will be used to determine the optimal dose regimen.
Secondary outcomes
Measurement of Cmax
Peak plasma concentration (Cmax)
Measurement of AUCtau
Area under the plasma concentration versus time curve (AUCtau)
Objective Response rate
Objective response rate (RECIST 1.1 assessment of CT/MRI imaging)
Progression-free survival
Progression-free survival (RECIST 1.1 assessment of CT/MRI imaging)
Sponsors and contacts
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