Galanin is a neuropeptide widely expressed in the gut, brain and spinal cord of mammals. It appears to play a role in a variety of functions, including pain transmission, feeding, regulation of blood pressure, sleep and waking regulation, regulation of mood and cognition. It has been linked to epilepsy, Altzheimer’s disease, depression, eating disorders and cancer. Mechenthaler, I, Cell. Mol. Life Sci., 65, 1826 (2008); Lundström, L.; et al., Neuromolecular Med., 7, 157 (2005); Berger, A; et al., Neuropeptides, 39, 353 (2005).