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Updated: Jun 23, 2026

Quantifying Antibody-Dependent Cellular Cytotoxicity in a Tumor Spheroid Model: Application for Drug Discovery
Published on: April 26, 2024
Sunitinib in solid tumors
Hui K Gan1, Bostjan Seruga, Jennifer J Knox
1Princess Margaret Hospital, Division of Medical Oncology and Hematology, 610 University Avenue, Toronto, Ontario, Canada.
Background:
Until recently, few treatments were available for renal cell carcinoma (RCC) and gastrointestinal stromal tumors (GIST). Several targeted agents inhibiting key pathogenetic pathways have since been developed for RCC (sunitinib, sorafenib, bevacizumab, temsirolimus, everolimus) and GIST (imatinib, sunitinib). Sunitinib is a multi-kinase inhibitor of VEGFR-2, PDGFR (alpha,beta), FLT-3, KIT, CSF-1 and RET.
Objective:
To summarize the literature regarding the structure, pharmacokinetics, pharmacodynamics, toxicity and current clinical use of sunitinib. Other potential roles for this drug in RCC, GIST and other tumor types will be discussed.
Methods:
A literature search identified relevant (pre)clinical studies of sunitinib and other relevant agents.
Results/Conclusions:
Sunitinib revolutionized the management of advanced RCC and GIST. With the realization that cross-resistance between targeted agents is incomplete, evolving strategies include sequential treatment, concurrent treatment, and biomarker development. Sunitinib also shows promise in several other tumor types that lack therapeutic options. What remains less clear is its role in tumors that are not heavily dependent on a central pathogenetic pathway, especially if effective cytotoxic therapies exist. Future clinical trials will clarify whether there is a role for sunitinib in these tumors, possibly in combination with cytotoxic agents.
Insights
Sunitinib has transformed advanced renal cell carcinoma (RCC) and gastrointestinal stromal tumors (GIST) treatment. Further research will explore its use in other cancers, potentially combined with chemotherapy.
Area of Science:
- Oncology
- Pharmacology
Background:
- Limited treatment options existed for renal cell carcinoma (RCC) and gastrointestinal stromal tumors (GIST) until recently.
- Targeted therapies like sunitinib have been developed, inhibiting key cancer-driving pathways.
Purpose of the Study:
- To review the structure, pharmacokinetics, pharmacodynamics, toxicity, and clinical applications of sunitinib.
- To discuss potential uses of sunitinib in RCC, GIST, and other cancers.
Main Methods:
- A literature search was conducted to identify relevant preclinical and clinical studies on sunitinib and related agents.
Main Results:
- Sunitinib has significantly improved outcomes for advanced RCC and GIST.
- Incomplete cross-resistance between targeted agents suggests potential for sequential or combination therapies.
Conclusions:
- Sunitinib represents a major advancement in managing advanced RCC and GIST.
- Its role in tumors not reliant on a single pathway, especially with existing cytotoxic options, requires further investigation.
- Future trials will clarify sunitinib's utility in other cancers, possibly in combination regimens.
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