Improved tumor vascular function following high-dose epidermal growth factor receptor tyrosine kinase inhibitor therapy
| Autor: | Sheye O. Aliu, Yun Kit Hom, Byron Hann, Lisa J. Wilmes, Mark M. Moasser, Ching Hang Wong, Donghui Wang, Ka-Loh Li, Nola M. Hylton |
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| Rok vydání: | 2007 |
| Předmět: |
Gadolinium DTPA
Pathology medicine.medical_specialty medicine.drug_class Contrast Media Mice Nude Antineoplastic Agents Breast Neoplasms Vascular permeability Article Tyrosine-kinase inhibitor Capillary Permeability Mice Gefitinib Growth factor receptor medicine Animals Radiology Nuclear Medicine and imaging Epidermal growth factor receptor skin and connective tissue diseases Tumor microenvironment Neovascularization Pathologic biology business.industry Cancer medicine.disease Magnetic Resonance Imaging Receptors Vascular Endothelial Growth Factor Quinazolines Cancer research biology.protein business Tyrosine kinase medicine.drug |
| Zdroj: | Journal of Magnetic Resonance Imaging. 26:1618-1625 |
| ISSN: | 1522-2586 1053-1807 |
| DOI: | 10.1002/jmri.21196 |
| Popis: | Purpose—To determine if inhibitors of the human growth factor receptor (HER) family can be used to enhance tumor vascular permeability and perfusion and optimize the efficacy of cytotoxic chemotherapeutics. Poor tumor vascular function limits the delivery and efficacy of cancer chemotherapeutics and HER family tyrosine kinases mediate tumor-endothelial signaling in both of these compartments. Materials and Methods—BT474 human breast cancer tumors were established in mice and the biologic effects of the HER tyrosine kinase inhibitor (TKI) gefitinib on tumor vascular function was determined by dynamic contrast enhanced MRI (DCE-MRI), and on tumor vascular architecture and perfusion by immunofluorescence microscopy. Results—A brief dose of gefitinib enhances the anti-tumor activity of paclitaxel in vivo but not in cell culture, suggesting that its chemo enhancing activity involves the in vivo microenvironment. A brief high dose of gefitinib induces a decrease in endothelial transfer constant Kps and a concomitant increase in tumor fractional plasma volume (fPV). These changes are accompanied by a rapid reduction in tumor volume likely due to decreased tumor edema, and modestly improved tumor vascular architecture and perfusion on microscopy. Conclusion—These data suggest that HER family TKIs have the potential to optimize the tumor microenvironment for delivery of cytotoxic chemotherapeutics. |
| Databáze: | OpenAIRE |
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