Abstract
In the search for new cholecystokinin (CCK) ligands, ureidopyrazolines were identified in combinatorial libraries using 168 chemically diverse amines. The structure-activity relationship optimisation of this pyrazoline template 4a resulted in novel 3-oxo-1,2-diphenyl-2,3-di-hydro-1H-pyrazol-4-yl)-N'-phenylureas 5a-5o. These novel CCK ligands have shown to act as mixed CCK-A/CCK-B ligands in a [125]I-CCK-8 receptor binding assay. The best pyrazoline 5e of this series displayed an IC50 of 20 and 25 nmol/L for the CCK-A, and CCK-B receptor, respectively. In a subsequent in vivo evaluation using various behavior pharmacological assays, an anxiolytic effect of these novel diphenylpyrazolinyl ureas was found in the elevated x-maze with an ED50 of 1.7 mg/kg. In the despair swimming test, a model for testing antidepressants, an ED50 of 0.69 mg/kg was determinated for urea 5e and the antidepressant effect had a magnitude comparable to desimipramine.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Analgesics / chemical synthesis
-
Analgesics / pharmacology
-
Animals
-
Anti-Anxiety Agents / chemical synthesis
-
Anti-Anxiety Agents / pharmacology
-
Antidepressive Agents / chemical synthesis
-
Antidepressive Agents / pharmacology
-
Anxiety / drug therapy
-
Anxiety / psychology
-
Cholecystokinin / antagonists & inhibitors*
-
Hand Strength / physiology
-
Hindlimb Suspension
-
Indicators and Reagents
-
Male
-
Mice
-
Motor Activity / drug effects
-
Pain Measurement / drug effects
-
Phenylurea Compounds / chemical synthesis*
-
Phenylurea Compounds / pharmacology*
-
Postural Balance / drug effects
-
Reaction Time / drug effects
-
Receptors, Cholecystokinin / antagonists & inhibitors
-
Sincalide / antagonists & inhibitors
-
Sincalide / metabolism
-
Structure-Activity Relationship
-
Swimming
Substances
-
Analgesics
-
Anti-Anxiety Agents
-
Antidepressive Agents
-
Indicators and Reagents
-
Phenylurea Compounds
-
Receptors, Cholecystokinin
-
Cholecystokinin
-
Sincalide