Journal
EXPERT REVIEW OF ANTICANCER THERAPY
Volume 21, Issue 9, Pages 1029-1054Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14737140.2021.1919090
Keywords
Antitumor; anticancer; cabozantinib; combination therapy; preclinical; receptor tyrosine kinase; review; RTK; synergistic; tyrosine kinase inhibitor
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Funding
- Ipsen
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Preclinical evidence demonstrates that cabozantinib has antitumor activity against various cancer cells and works synergistically with other anticancer agents, including immune checkpoint inhibitors and hormone receptor or metabolic pathway inhibitors. Further optimization of cabozantinib treatment requires identifying biomarkers of response and resistance, as well as exploring complementary drug targets. Investigation of adaptive resistance mechanisms, such as epithelial to mesenchymal transition and immunomodulation, and identifying novel drug targets based on cancer stem cell metabolomic phenotypes, are promising approaches.
Introduction Altered receptor tyrosine kinase (RTK) signaling contributes to tumorigenesis and suppression of immune-mediated destruction of cancer cells. Cabozantinib is an oral tyrosine kinase inhibitor that inhibits several RTKs involved in tumorigenesis, and is approved for the treatment of patients with progressive metastatic medullary thyroid cancer, advanced renal cell carcinoma, and hepatocellular carcinoma that has been previously treated with sorafenib. Areas covered We present an up-to-date evaluation of preclinical evidence for RTK inhibition with cabozantinib, specifically VEGFR, MET, KIT, RET, AXL, FLT3, and associated antitumor effects. Preclinical investigations of cabozantinib in combination with other anticancer drugs are also reviewed. Expert opinion Preclinical evidence shows that cabozantinib has antitumor activity against various cancer cells and exhibits synergy with other anticancer agents, including immune checkpoint inhibitors and hormone receptor or metabolic pathway inhibitors. Further optimization of cabozantinib treatment requires the identification of biomarkers of response and resistance, and exploration of complementary drug targets. Investigation of mechanisms of adaptive resistance, such as epithelial to mesenchymal transition (cancer intrinsic) and immunomodulation by the tumor microenvironment (cancer extrinsic), as well as identification of novel drug targets based on characterization of cancer stem cell metabolomic phenotypes, appear to be promising approaches.
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