An investigation of [delta]- and [mu]-opioid receptors: putative subtypes and interactions

The possible existence of μ- and δ-opioid receptor subtypes, and interactions between μ- and δ-opioid receptors, has been examined in isolated tissue preparations, by radio-ligand binding in rodent brain homogenates and at the second messenger level using cell cultures of human neuroblastoma SH-SY5Y cells. [Continues.]