Comparing antibody and small-molecule therapies for cancer

Several small-molecule inhibitors and monoclonal antibodies are now approved for the therapy of various cancers. Focusing on the example of the epidermal growth factor receptor inhibitors, this Review compares and contrasts these two classes of agents. The 'magic bullet' concept of specifically targeting cancer cells at the same time as sparing normal tissues is now proven, as several monoclonal antibodies and targeted small-molecule compounds have been approved for cancer treatment. Both antibodies and small-molecule compounds are therefore promising tools for target-protein-based cancer therapy. We discuss and compare the distinctive properties of these two therapeutic strategies so as to provide a better view for the development of new drugs and the future direction of cancer therapy.