Based on a proprietary platform technology, we offer rodent hypo- thalamic and hippocampal neuronal cell lines that have been created by immortalizing primary cultures using retroviral transfer of SV40 T-Ag. These cell lines express an expanding array of neuropeptides, enzymatic markers and biologically active receptors including: Neuropeptide Y, Oxytocin, POMC, Ghrelin, Metastatin/Kisspeptin, Arg Vasopressin, Leptin Receptor (ObRb), GHS-R, Estrogen alpha and beta Receptors, Serotonin Receptor and Neurotensin.