Abstract: Compounds and methods for treating, inhibiting, or delaying the onset of cancer in a subject by administering a therapeutically effective amount of a keratinocyte growth factor receptor tyrosine kinase (KGFR TK) inhibitor to the subject in need of such treatment. Also provided are compounds and methods for the treating, inhibiting, or delaying the onset of metastasis in a subject with cancer by administering a therapeutically effective amount of a KGFR TK inhibitor to the subject in need of such treatment.

Abstract: A conjugate is disclosed herein, wherein the conjugate includes a ligand having the ability to specifically and stably bind to an external receptor or binding site on a tumor vasculature endothelial cell, wherein the external receptor or binding site is specific for tumor vasculature endothelial cells. The conjugate also includes an anticancer agent that is selectively toxic to cancer cells operatively attached to the ligand. The anticancer agent may be L-methioninase. Pharmaceutical compositions comprising the conjugate are also disclosed, as well as methods of treating a cancer tumor or cancer cells with a therapeutically effective amount of the conjugate.