Evaluations of vascular disrupting agents CA4P and OXi4503 in renal cell carcinoma (Caki-1) using a silicon based microvascular casting technique.

The present study evaluated the treatment efficacy of the vascular disrupting agents CA4P and OXi4503 in an orthotopically transplanted human renal cell carcinoma xenograft model (Caki-1). Experiments used vascular casting, vessel density assessments as well as tumour necrosis measurements to evaluate the efficacy of these agents. After treatment with either agent, assessment of the vascular casts showed an almost total eradication of tumour blood vessels. Histological evidence further supported this observation, showing extensive central tumour necrosis with only a small viable rim of tumour cells remaining at the periphery. These results suggest that vascular disrupting agents CA4P and OXi4503 may have utility in the treatment of renal cell carcinoma, an encouraging result given that current conventional therapies have been currently largely unsuccessful in managing this disease.