The present invention provides methods for modulating cell death in a eukaryotic
cell, and methods for reducing DNA damage in a eukaryotic cell. The methods generally
comprise modulating a biological activity of DNA-PK in a cell. The invention further
provides methods of treating a condition related to cell death in an individual.
The invention further provides methods of identifying agents which modulate a biological
activity of DNA-PK, as well as agents identified by the methods. Methods of modulating
an immune response using an identified agent are also provided.