Biomaterial Database

Amphetamine-induced hypersensitivity in guinea pigs. 1979

W J Weiner, and C G Goetz, and P A Nausieda, and H L Klawans

Chronic administration of d-amphetamine to young guinea pigs results in an increased behavioral response to this drug. After 6 months of daily amphetamine exposure, animals demonstrated behavioral hypersensitivity and developed full amphetamine-induced stereotyped behavior with decreased latency. The data suggest that chronic agonism with amphetamine can produce dopaminergic hypersensitivity, a behavior that contrasts with the development of drug tolerance to other pharmacologic agents. The mechanism of this induced hypersensitivity was studied by comparing brain amphetamine levels after acute and chronic amphetamine treatment. The two groups of guinea pigs showed no significant difference in amphetamine levels or drug distribution. These results suggest that altered amphetamine metabolism cannot account for the hypersensitivity seen after amphetamine exposure. Guinea pigs chronically pretreated with d-amphetamine were hypersensitive to another dopaminergic agonist whose metabolic pathway is distinct from that of amphetamine. These results have therapeutic implications in the management of clinical conditions related to chronic agonist-induced hypersensitivity.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D011954	Receptors, Dopamine	Cell-surface proteins that bind dopamine with high affinity and trigger intracellular changes influencing the behavior of cells.	Dopamine Receptors,Dopamine Receptor,Receptor, Dopamine
D001923	Brain Chemistry	Changes in the amounts of various chemicals (neurotransmitters, receptors, enzymes, and other metabolites) specific to the area of the central nervous system contained within the head. These are monitored over time, during sensory stimulation, or under different disease states.	Chemistry, Brain,Brain Chemistries,Chemistries, Brain
D006168	Guinea Pigs	A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.	Cavia,Cavia porcellus,Guinea Pig,Pig, Guinea,Pigs, Guinea
D000661	Amphetamine	A powerful central nervous system stimulant and sympathomimetic. Amphetamine has multiple mechanisms of action including blocking uptake of adrenergics and dopamine, stimulation of release of monamines, and inhibiting monoamine oxidase. Amphetamine is also a drug of abuse and a psychotomimetic. The l- and the d,l-forms are included here. The l-form has less central nervous system activity but stronger cardiovascular effects. The d-form is DEXTROAMPHETAMINE.	Desoxynorephedrin,Levoamphetamine,Phenopromin,l-Amphetamine,Amfetamine,Amphetamine Sulfate,Amphetamine Sulfate (2:1),Centramina,Fenamine,Mydrial,Phenamine,Thyramine,levo-Amphetamine,Sulfate, Amphetamine,l Amphetamine,levo Amphetamine
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001058	Apomorphine	A derivative of morphine that is a dopamine D2 agonist. It is a powerful emetic and has been used for that effect in acute poisoning. It has also been used in the diagnosis and treatment of parkinsonism, but its adverse effects limit its use.	Apokinon,Apomorphin-Teclapharm,Apomorphine Chloride,Apomorphine Hydrochloride,Apomorphine Hydrochloride Anhydrous,Apomorphine Hydrochloride, Anhydrous,Apomorphine Hydrochloride, Hemihydrate,Britaject,Apomorphin Teclapharm
D001522	Behavior, Animal	The observable response an animal makes to any situation.	Autotomy Animal,Animal Behavior,Animal Behaviors