A method of inhibiting an interaction between a S100 protein and the receptor for advanced glycation end-products is provided comprising administering to a subject a therapeutically effective amount of cromolyn, C5, or salt, hydrate, or solvate thereof. In some embodiments, the S100 protein is S100P. In some embodiments, the S100 protein is S100P. In addition, the present invention provides a method of treating a cancer comprising administering to a mammal a therapeutically effective amount of cromolyn, C5, or salt, hydrate, or solvate thereof. Additional methods are also provided.
