Biomaterial Database

Disappearance of gamma-aminobutyric acid (GABA)B receptor-mediated cAMP suppression in mouse cerebrum after chronic treatment with morphine. 1996

T Ichida, and K Kuriyama

Second Department of Medicine, Kyoto Prefectural University of Medicine, Japan.

The effects of chronic morphine administration (dependence) and naloxone-induced withdrawal on cerebral GABAB receptor and its signal transduction system were examined. Alterations in receptor affinity and number and in the amount of Gi protein were determined by radioligand binding assay and immunoblotting with Gi protein antibody, respectively. [3H]GABA binding to GABAB receptors in the brain of morphine-dependent and -withdrawn mice showed no significant change in either high or low affinity sites. Similarly, no alterations were noted in the coupling between GABAB receptor and Gi protein or in the amount of protein. However, the suppressive effect of baclofen, a GABAB agonist, on forskolin-stimulated cAMP formation in cerebral cortical slices of these animals was abolished. These results indicate that chronic morphine administration may induce functional deterioration in the coupling between Gi protein and the adenylate cyclase system.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009020	Morphine	The principal alkaloid in opium and the prototype opiate analgesic and narcotic. Morphine has widespread effects in the central nervous system and on smooth muscle.	Morphine Sulfate,Duramorph,MS Contin,Morphia,Morphine Chloride,Morphine Sulfate (2:1), Anhydrous,Morphine Sulfate (2:1), Pentahydrate,Oramorph SR,SDZ 202-250,SDZ202-250,Chloride, Morphine,Contin, MS,SDZ 202 250,SDZ 202250,SDZ202 250,SDZ202250,Sulfate, Morphine
D002540	Cerebral Cortex	The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulci. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.	Allocortex,Archipallium,Cortex Cerebri,Cortical Plate,Paleocortex,Periallocortex,Allocortices,Archipalliums,Cerebral Cortices,Cortex Cerebrus,Cortex, Cerebral,Cortical Plates,Paleocortices,Periallocortices,Plate, Cortical
D000242	Cyclic AMP	An adenine nucleotide containing one phosphate group which is esterified to both the 3'- and 5'-positions of the sugar moiety. It is a second messenger and a key intracellular regulator, functioning as a mediator of activity for a number of hormones, including epinephrine, glucagon, and ACTH.	Adenosine Cyclic 3',5'-Monophosphate,Adenosine Cyclic 3,5 Monophosphate,Adenosine Cyclic Monophosphate,Adenosine Cyclic-3',5'-Monophosphate,Cyclic AMP, (R)-Isomer,Cyclic AMP, Disodium Salt,Cyclic AMP, Monoammonium Salt,Cyclic AMP, Monopotassium Salt,Cyclic AMP, Monosodium Salt,Cyclic AMP, Sodium Salt,3',5'-Monophosphate, Adenosine Cyclic,AMP, Cyclic,Adenosine Cyclic 3',5' Monophosphate,Cyclic 3',5'-Monophosphate, Adenosine,Cyclic Monophosphate, Adenosine,Cyclic-3',5'-Monophosphate, Adenosine,Monophosphate, Adenosine Cyclic
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
D001418	Baclofen	A GAMMA-AMINOBUTYRIC ACID derivative that is a specific agonist of GABA-B RECEPTORS. It is used in the treatment of MUSCLE SPASTICITY, especially that due to SPINAL CORD INJURIES. Its therapeutic effects result from actions at spinal and supraspinal sites, generally the reduction of excitatory transmission.	Baclophen,Chlorophenyl GABA,Apo-Baclofen,Atrofen,Ba-34,647,Ba-34647,Baclofen AWD,Baclofène-Irex,Baclospas,CIBA-34,647-BA,Clofen,Gen-Baclofen,Genpharm,Lebic,Lioresal,Liorésal,Nu-Baclo,PCP-GABA,PMS-Baclofen,beta-(Aminomethyl)-4-chlorobenzenepropanoic Acid,beta-(p-Chlorophenyl)-gamma-aminobutyric Acid,AWD, Baclofen,Apo Baclofen,ApoBaclofen,Ba34,647,Ba34647,Baclofène Irex,BaclofèneIrex,CIBA34,647BA,GABA, Chlorophenyl,Gen Baclofen,GenBaclofen,Nu Baclo,NuBaclo,PMS Baclofen,PMSBaclofen
D013375	Substance Withdrawal Syndrome	Physiological and psychological symptoms associated with withdrawal from the use of a drug after prolonged administration or habituation. The concept includes withdrawal from smoking or drinking, as well as withdrawal from an administered drug.	Drug Withdrawal Symptoms,Withdrawal Symptoms,Drug Withdrawal Symptom,Substance Withdrawal Syndromes,Symptom, Drug Withdrawal,Symptom, Withdrawal,Symptoms, Drug Withdrawal,Symptoms, Withdrawal,Syndrome, Substance Withdrawal,Syndromes, Substance Withdrawal,Withdrawal Symptom,Withdrawal Symptom, Drug,Withdrawal Symptoms, Drug,Withdrawal Syndrome, Substance,Withdrawal Syndromes, Substance
D015153	Blotting, Western	Identification of proteins or peptides that have been electrophoretically separated by blot transferring from the electrophoresis gel to strips of nitrocellulose paper, followed by labeling with antibody probes.	Immunoblotting, Western,Western Blotting,Western Immunoblotting,Blot, Western,Immunoblot, Western,Western Blot,Western Immunoblot,Blots, Western,Blottings, Western,Immunoblots, Western,Immunoblottings, Western,Western Blots,Western Blottings,Western Immunoblots,Western Immunoblottings
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D018080	Receptors, GABA-B	A subset of GABA RECEPTORS that signal through their interaction with HETEROTRIMERIC G-PROTEINS.	Baclofen Receptors,GABA-B Receptors,Baclofen Receptor,GABA receptor rho1,GABA type B receptor, subunit 1,GABA(B)R1,GABA(B)R1 receptor,GABA(B)R1a protein,GABA(B)R1a receptor,GABA(B)R1b protein,GABA(B)R1b receptor,GABA-B Receptor,GABBR1 protein,GB1a protein,GB1b protein,GBR1B protein,Receptors, Baclofen,rho1 subunit, GABA receptor