title: Evidence for high affinity [3H] imipramine binding sites in human lung.
abstract: [3H] imipramine exhibits both saturable and high affinity binding sites in human lung with a maximal number of binding sites of 7.50 pmoles/mg protein and a dissociation constant of 1.74 nM. Displacement studies indicate that these sites can be considered as specific of imipramine, tricyclic compounds and also monoamine uptake inhibitors:fluoxetine and nisoxetine. Atypical antidepressants were inactive as ligands of main known receptors.
mesh_terms: D000928:Antidepressive Agents / Q000494:pharmacology; D000929:Antidepressive Agents, Tricyclic / Q000494:pharmacology; D001667:Binding, Competitive; D002352:Carrier Proteins; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D008168:Lung / Q000378:metabolism*; D011955:Receptors, Drug; D017981:Receptors, Neurotransmitter / Q000378:metabolism*
chemical_list: D000928:Antidepressive Agents; D000929:Antidepressive Agents, Tricyclic; D002352:Carrier Proteins; D011955:Receptors, Drug; D017981:Receptors, Neurotransmitter; C027775:imipramine receptor