We used an oral form of CKD-516 and designed a combination experiment with sorafenib. BLI tumor viability measurement showed CKD-516 was effective in combination with sorafenib, but there was only a slight improvement when treated alone. By MRI, the CKD-516 group showed notable intratumoral hemorrhage and central necrosis from the early stage of treatment. By IHC, CKD-516 was advantageous in collapsing blood vessels in tumor tissue, and was more effective when treated in combination with sorafenib. Therefore, oral CKD-516 was advantageous over sorafenib in terms of vascular disrupting ability, and combination of CKD-516 with sorafenib reduced the rebound phenomenon.
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