Pharmacological specificity of brain histamine H2-receptors differs in intact cells and cell-free preparations.

Adenylyl Cyclases/metabolism Animals Antidepressive Agents, Tricyclic/pharmacology Cell-Free System Enzyme Activation/drug effects Guanidines/pharmacology Guinea Pigs Hippocampus/drug effects Histamine H1 Antagonists/pharmacology Histamine H2 Antagonists/pharmacology Imidazoles/pharmacology Impromidine In Vitro Techniques Receptors, Histamine/drug effects Receptors, Histamine H2/drug effects

Antidepressive Agents, Tricyclic Guanidines Histamine H1 Antagonists Histamine H2 Antagonists Imidazoles Receptors, Histamine Receptors, Histamine H2 Impromidine Adenylyl Cyclases