Abstract
PURPOSE: The aim of the study was to evaluate the safety and determine the maximum tolerated dose (MTD) of intravenous catumaxomab, a trifunctional bispecific antibody that binds to EpCAM on epithelial cancer cells and CD3 on T cells.
METHODS: The trial was a dose-escalation study with a 3 + 3 design in epithelial cancers with known EpCAM expression. The dose-limiting toxicity (DLT) period consisted of 4 weeks, with weekly intravenous administration of catumaxomab. Key DLTs were ≥grade 3 optimally treated non-hematological toxicity; ≥grade 3 infusion-related reactions refractory to supportive care; ≥grade 3 increase in liver enzymes and/or bilirubin not resolving to grade 2.
RESULTS: Sixteen patients were enrolled receiving doses of 2 (n = 5), 4 (n = 3), 7 (n = 7) and 10 µg catumaxomab (n = 1). The most common treatment-emergent adverse events (TEAEs) were chills (93.8 %) and pyrexia (87.5 %). The most common TEAE of grade ≥3 was transient dose-dependent increases in aspartate aminotransferase (56.3 %). The intensity of toxicities decreased with the number of infusions. Also, serum IL-6 increased in a dose-dependent manner and reverted to low or undetectable levels after four infusions. A reversible decrease in liver function test (prothrombin time) at the 7-µg dose level was considered a DLT. The first patient at 10 µg experienced a fatal hepatic failure related to catumaxomab that led to the termination of the study.
CONCLUSIONS: The MTD of weekly intravenous catumaxomab was 7 µg. Major toxicities were cytokine release-related symptoms and hepatotoxicity.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Cancer Chemotherapy and Pharmacology |
| Vol/bind | 75 |
| Udgave nummer | 5 |
| Sider (fra-til) | 1065-73 |
| Antal sider | 9 |
| ISSN | 0344-5704 |
| DOI | |
| Status | Udgivet - 1 maj 2015 |
| Udgivet eksternt | Ja |
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