Bioelectricity of Cancer

This issue comprises eight articles. We open with a timely review by Payne et al. on the mechanisms of metastasis operating in solid tumors. This is followed by a technical article by Rocha et al. on microelectrode arrays that can record the electrical activities of cancer cells less invasively than conventional microelectrodes and give information on the behavior of populations of cells. This technique is revealing how normally quiescent cells such as epithelial and glial cells express voltage-gated K+, Na+, and Cl− channels, and become electrically excitable once they become cancerous.