Castrated rats treated with testosterone had significantly reduced heart damage and near-control stem cell and protein levels, the study found.

WSJ: Protein in the Brain May Affect Adaptability

The patients who had the stem cell marker protein Lamin A present in their tissue were more likely to have an aggressive form of the disease.

BBC: Tag for aggressive bowel cancer

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