The past year has witnessed significant advances in our understanding
of the mechanisms that kill neurons during programmed cell death. The
executioners are members of a family of proteases founded by ced-3, th
e product of a gene that is required for programmed cell death in the
nematode Caenorhabditis elegans, and by mammalian interleukin-1 beta-c
onverting enzyme. These proteases represent interesting novel targets
for the therapy of acute and chronic pathologies of the nervous system
associated with neuronal death.