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Sunitinib: a newly approved small-molecule inhibitor of angiogenesis
Elwyn Cabebe1, Heather Wakelee
1Division of Medical Oncology, Stanford University, Stanford, California 94305, USA.
Abstract:
The advent of targeted therapies has allowed treatment to be directed at signaling pathways integral to tumor growth and survival. Sunitinib (SU11248, sunitinib malate; Pfizer Inc., New York, NY, USA) is a novel oral small-molecule multitargeted receptor tyrosine kinase inhibitor that has demonstrated direct antitumor activity and antiangiogenic action. It targets the vascular endothelial growth factor receptor (VEGFR), platelet derived growth factor receptor (PDGFR), stem-cell factor receptor and Fms-like tyrosine kinase receptor 3 receptor tyrosine-kinases. In January 2006, sunitinib malate was granted approval by the U.S. Food and Drug Administration for the treatment of gastrointestinal stromal tumor after disease progression on, or intolerance to, imatinib mesylate, as well as for the treatment of metastatic renal cell cancer. This review will discuss the development of sunitinib, particularly in acute myeloid leukemia, imatinib-resistant gastrointestinal stromal tumors and renal cell cancer. The review will also discuss ongoing trials with sunitinib in other malignancies such as neuroendocrine tumors and breast cancer, as well as its potential future development in combination therapy with other agents and in other malignancies.
Insights
Sunitinib, a targeted therapy, shows antitumor and antiangiogenic effects by inhibiting receptor tyrosine kinases. It is approved for gastrointestinal stromal tumors and renal cell cancer, with ongoing trials in other malignancies.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Targeted therapies are revolutionizing cancer treatment by inhibiting tumor growth pathways.
- Sunitinib is an oral, small-molecule, multitargeted receptor tyrosine kinase inhibitor.
- It exhibits direct antitumor activity and antiangiogenic properties.
Purpose of the Study:
- To review the development and therapeutic applications of sunitinib.
- To discuss sunitinib's efficacy in gastrointestinal stromal tumors and renal cell cancer.
- To explore ongoing and future trials of sunitinib in various malignancies.
Main Methods:
- Review of preclinical and clinical data on sunitinib.
- Analysis of sunitinib's mechanism of action, targeting VEGFR, PDGFR, and other kinases.
- Examination of regulatory approvals and ongoing clinical trials.
Main Results:
- Sunitinib targets key receptor tyrosine kinases involved in tumor growth and angiogenesis.
- Approved for gastrointestinal stromal tumors (GIST) and metastatic renal cell cancer (RCC).
- Demonstrated antitumor activity and antiangiogenic effects.
Conclusions:
- Sunitinib is an effective targeted therapy for specific cancers.
- Ongoing research is expanding its use in other malignancies and combination therapies.
- Future development holds promise for broader oncological applications.
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