Erbb2, or Her2, is the target of breast cancer drug Herceptin from Roche and lapatinib from GlaxoSmithkline.

FORBES: A New Way To Find Cancer Drugs

In a parallel experiment he looked at a group of women being treated with a new drug called lapatinib.

ECONOMIST: Cancer therapy

Lapatinib is a product of the growing field of molecular medicine the design of drugs to attack specific protein molecules associated with particular diseases.

ECONOMIST: Cancer therapy

In March, NICE ruled against the use of two drugs, Lapatinib and Sutent, that prolong the life of those with certain forms of breast and stomach cancer.

WSJ: Of NICE and Men

Lapatinib, it turns out, also inhibits the activity of a protein called the epidermal growth factor receptor, which has been found to be important for stem-cell proliferation.

ECONOMIST: Cancer therapy

Targeted therapies include trastuzumab (Herceptin) or lapatinib (Tykerb).

CNN: Recurrent breast cancer