Biomaterial Database

Circadian rhythms in rat brain neurotransmitter receptors. 1983

M S Kafka, and A Wirz-Justice, and D Naber, and R Y Moore, and M A Benedito

In the rat brain there are daily rhythms in the number of alpha- and beta-adrenergic, muscarinic cholinergic, dopamine, opiate, and benzodiazepine receptors. The rhythms are circadian, i.e., with periods of approximately 24 h and endogenously generated. The characteristics of the circadian rhythms change over the year. Ablation of the suprachiasmatic nuclei, believed to act as a biological clock, abolishes the circadian rhythms. In the cerebral cortex the circadian rhythm in norepinephrine-stimulated cyclic AMP production is a biological response to the circadian rhythms in alpha- and beta-adrenergic receptors. The effects on neurotransmitter receptor rhythms of treatments that are antidepressant in humans were studied. Chronic administration of the antidepressant drugs imipramine and clorgyline delays the timing of the peak number of many receptors. Chronic administration of the antidepressant, antimanic drug lithium carbonate delays the timing of the peak number of some receptors and abolishes the rhythms in several others. Twenty-four hours of sleep deprivation is almost without effect on the rhythms. Fluphenazine and lithium, both antimanic in humans, increase the 24-h mean number of most receptors. Circadian receptor rhythms evoking intracellular circadian biological responses may modulate brain neurotransmission, coordinating internal physiological processes, and synchronizing them to environmental events. Alterations in circadian receptor rhythms with chronic psychoactive drug administration may play a role in the therapeutic actions of these drugs.

UI	MeSH Term	Description	Entries
D007099	Imipramine	The prototypical tricyclic antidepressant. It has been used in major depression, dysthymia, bipolar depression, attention-deficit disorders, agoraphobia, and panic disorders. It has less sedative effect than some other members of this therapeutic group.	Imidobenzyle,Imizin,4,4'-Methylenebis(3-hydroxy-2-naphthoic acid)-3-(10,11-dihydro-5H-dibenzo(b,f)azepin-5-yl)-N,N-dimethyl-1-propanamine (1:2),Imipramine Hydrochloride,Imipramine Monohydrochloride,Imipramine Pamoate,Janimine,Melipramine,Norchlorimipramine,Pryleugan,Tofranil
D008094	Lithium	An element in the alkali metals family. It has the atomic symbol Li, atomic number 3, and atomic weight [6.938; 6.997]. Salts of lithium are used in treating BIPOLAR DISORDER.	Lithium-7,Lithium 7
D008297	Male		Males
D011956	Receptors, Cell Surface	Cell surface proteins that bind signalling molecules external to the cell with high affinity and convert this extracellular event into one or more intracellular signals that alter the behavior of the target cell (From Alberts, Molecular Biology of the Cell, 2nd ed, pp693-5). Cell surface receptors, unlike enzymes, do not chemically alter their ligands.	Cell Surface Receptor,Cell Surface Receptors,Hormone Receptors, Cell Surface,Receptors, Endogenous Substances,Cell Surface Hormone Receptors,Endogenous Substances Receptors,Receptor, Cell Surface,Surface Receptor, Cell
D002940	Circadian Rhythm	The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and physiological stimuli.	Diurnal Rhythm,Nyctohemeral Rhythm,Twenty-Four Hour Rhythm,Nycthemeral Rhythm,Circadian Rhythms,Diurnal Rhythms,Nycthemeral Rhythms,Nyctohemeral Rhythms,Rhythm, Circadian,Rhythm, Diurnal,Rhythm, Nycthemeral,Rhythm, Nyctohemeral,Rhythm, Twenty-Four Hour,Rhythms, Circadian,Rhythms, Diurnal,Rhythms, Nycthemeral,Rhythms, Nyctohemeral,Rhythms, Twenty-Four Hour,Twenty Four Hour Rhythm,Twenty-Four Hour Rhythms
D003010	Clorgyline	An antidepressive agent and monoamine oxidase inhibitor related to PARGYLINE.	Clorgilin,Chlorgyline,Clorgiline
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
D012621	Seasons	Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Seasonal Variation,Season,Seasonal Variations,Variation, Seasonal,Variations, Seasonal
D012892	Sleep Deprivation	The state of being deprived of sleep under experimental conditions, due to life events, or from a wide variety of pathophysiologic causes such as medication effect, chronic illness, psychiatric illness, or sleep disorder.	Inadequate Sleep,Insufficient Sleep,Insufficient Sleep Syndrome,REM Sleep Deprivation,Sleep Debt,Sleep Fragmentation,Sleep Insufficiency,Deprivation, REM Sleep,Deprivation, Sleep,Fragmentation, Sleep,Insufficiencies, Sleep,Insufficiency, Sleep,Insufficient Sleep Syndromes,Sleep Deprivation, REM,Sleep Insufficiencies,Sleep, Inadequate,Sleep, Insufficient,Syndrome, Insufficient Sleep
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus