Enhanced nociceptive responding in two rat models of depression is associated with alterations in monoamine levels in discrete brain regions Burke N.N. a , Hayes E. b1 , Calpin P. a , Kerr, D.M. a,b , Moriarty O. b , Finn D.P. b , Roche M. a* a Physiology, b Pharmacology and Therapeutics, Centre for Pain Research, NCBES Galway Neuroscience Cluster, National University of Ireland, Galway, University Road, Galway, Ireland Corresponding Author: Dr Michelle Roche, Physiology, School of Medicine, National University of Ireland, Galway, University Road, Galway, Ireland. Tel: 353 91 495427 Fax: 353 91 494544 Email: Michelle.roche@nuigalway.ie 1 Present Address: Tenovus Centre for Cancer Research, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, Wales, UK 1