Dogs Are More Sensitive to Antagonists of Inhibitor of Apoptosis Proteins Than Rats and Humans: A Translational Toxicokinetic/Toxicodynamic Analysis
| Autor: | Elizabeth Blackwood, Patricia LoRusso, Joseph A. Ware, S. Gail Eckhardt, Wayne J. Fairbrother, Iris T. Chan, Rebecca Erickson, Stephen E. Gould, Andrew J. Wagner, John A. Flygare, Ron Yu, Ronald Steigerwalt, Kristina West, Walter C. Darbonne, Harvey Wong, Cornelis E. A. C. Hop, Michael Mamounas, Nageshwar Budha |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Apoptosis Inhibitor medicine.medical_treatment Population Drug Evaluation Preclinical Context (language use) Biology Pharmacology Toxicology Inhibitor of apoptosis Models Biological Inhibitor of Apoptosis Proteins Rats Sprague-Dawley Dogs Species Specificity Cyclohexanes Internal medicine medicine Animals Humans Pyrroles education education.field_of_study Caspase Inhibitors Rats XIAP Cytokine Endocrinology Apoptosis Area Under Curve Injections Intravenous Cytokines Female Tumor necrosis factor alpha Half-Life |
| Zdroj: | Toxicological Sciences. 130:205-213 |
| ISSN: | 1096-0929 1096-6080 |
| DOI: | 10.1093/toxsci/kfs235 |
| Popis: | Inhibitor of apoptosis (IAP) proteins suppress apoptosis and are overexpressed in a variety of cancers. GDC-0152 is a potent and selective IAP antagonist being developed as an anticancer agent. In preclinical safety studies, dogs were particularly sensitive to GDC-0152 showing adverse signs of a tumor necrosis factor alpha (TNF-α) driven systemic inflammatory response, related to cellular IAP degradation and activation of NFκB signaling, at lower exposures compared with rat. In addition, downstream increases in systemic levels of cytokines and chemokines, such as monocyte chemotactic protein-1 (MCP-1), were observed. A semimechanistic population toxicokinetic/toxicodynamic (TK/TD) model incorporating transit compartments was used to fit MCP-1 plasma concentrations from rats or dogs given iv GDC-0152 doses. Estimated TD parameters inferred that lower GDC-0152 plasma concentrations triggered more severe increases in plasma MCP-1 in dogs compared with rats. Human simulations performed using dog TD parameters and human pharmacokinetics predicted 300-2400% increases of MCP-1 in humans at iv doses from 0.76 to 1.48mg/kg. Similar simulations using rat TD parameters suggest little or no change. Patients given iv doses of GDC-0152 up to 1.48mg/kg iv showed no substantial increases in systemic MCP-1 or signs of a severe TNF-α driven systemic inflammatory response. Emerging clinical data reported for other IAP antagonists are consistent with our observations. Taken together, the data suggest dogs are more sensitive to IAP antagonists compared with humans and rats. This study illustrates how TK/TD analysis can be utilized to quantitatively translate and context an identified preclinical safety risk in dogs to humans. |
| Databáze: | OpenAIRE |
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