A Mechanism-Based Combination Therapy Reduces Local Tumor Growth and Metastasis in an Orthotopic Model of Prostate Cancer
| Autor: | Imran Rizvi, Boleslav Kosharskyy, Nicolas Solban, Sung K. Chang, Yuchiao Chang, Tayyaba Hasan |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Male
Vascular Endothelial Growth Factor A Cancer Research Pathology medicine.medical_specialty Combination therapy medicine.medical_treatment Angiogenesis Inhibitors Photodynamic therapy Cell Growth Processes Mice SCID Metastasis Neovascularization Mice chemistry.chemical_compound Prostate cancer Cyclohexanes Cell Line Tumor LNCaP medicine Animals Humans Neoplasm Metastasis Lymph node O-(Chloroacetylcarbamoyl)fumagillol Neovascularization Pathologic business.industry Prostatic Neoplasms medicine.disease Combined Modality Therapy Xenograft Model Antitumor Assays eye diseases Vascular endothelial growth factor medicine.anatomical_structure Photochemotherapy Oncology chemistry Lymphatic Metastasis Cancer research medicine.symptom business Sesquiterpenes |
| Zdroj: | Cancer Research. 66:10953-10958 |
| ISSN: | 1538-7445 0008-5472 |
| DOI: | 10.1158/0008-5472.can-06-1793 |
| Popis: | Therapy-induced stimulation of angiogenic molecules can promote tumor angiogenesis leading to enhanced tumor growth and cancer metastasis. Several standard and emerging therapies, such as radiation and photodynamic therapy (PDT), can induce angiogenic molecules, thus limiting their effectiveness. PDT is approved for the treatment of several cancers; however, its induction of vascular endothelial growth factor (VEGF) creates conditions favorable to enhanced tumor growth and metastasis, therefore mitigating its cytotoxic and antivascular effects. This is the first report showing that subcurative PDT in an orthotopic model of prostate cancer (LNCaP) increases not only VEGF secretion (2.1-fold) but also the fraction of animals with lymph node metastases. PDT followed by administration of an antiangiogenic agent, TNP-470, abolished this increase and reduced local tumor growth. On the other hand, administration of TNP-470 before PDT was less effective at local tumor control. In addition, animals in all groups, except in the PDT + TNP-470 group, had a weight loss of >3 g at the time of sacrifice; the weight of the animals in the PDT + TNP-470 group did not change. The significant reduction (P < 0.05) in tumor weight and volume observed between the PDT + TNP-470 group and the control group suggests that the combination of PDT and antiangiogenic treatment administered in the appropriate sequence was not only more effective at controlling local tumor growth and metastases but also reduced disease-related toxicities. Such molecular response-based combinations merit further investigations as they enhance both monotherapies and lead to improved treatment outcomes. (Cancer Res 2006; 66(22): 10953-8) |
| Databáze: | OpenAIRE |
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