Biomaterial Database

Supersensitization of the oral response to SKF 38393 in neonatal 6-hydroxydopamine-lesioned rats is eliminated by neonatal 5,7-dihydroxytryptamine treatment. 1994

R Brus, and R M Kostrzewa, and K W Perry, and R W Fuller

Department of Pharmacology, Quillen College of Medicine, East Tennessee State University, Johnson City.

5-Hydroxytryptamine (5-HT) 5-HT2c receptors mediate the enhanced oral activity response to the dopamine (DA) D1 agonist, (+/-)-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine-7,8-diol (SKF 38393) in neonatal 6-hydroxydopamine (6-OHDA)-lesioned rats. To study the possible involvement of 5-HT fibers on this process, the effect of the 5-HT neurotoxin, 5,7-dihydroxytryptamine (5,7-DHT) was determined. Rats were treated at 3 days after birth with desipramine (20 mg/kg i.p., base) 1 hr before intracerebroventricular vehicle, 6-OHDA (134 micrograms, base) and/or 5,7-DHT (50 micrograms, base). Oral activity was observed at 7 weeks and later. In neonatal 6-OHDA-lesioned rats oral activity dose-effect responses were increased by SKF 38393, 1-(3-chlorophenyl)-piperazine (m-CPP) and pilocarpine-respective DA D1, 5-HT2c and muscarinic receptor agonists. Rats treated neonatally with 5,7-DHT had agonist-induced responses resembling that of the saline control group. However, in rats treated neonatally with both 5,7-DHT and 6-OHDA, oral activity responses were reduced at nearly all doses of SKF 38393 and pilocarpine vs. that of the 6-OHDA group. The response of the 5,7-DHT + 6-OHDA group to m-CPP was reduced at only the 1.0 mg/kg dose. Of a variety of stereotyped behaviors that were observed in separate test sessions, m-CPP-induced grooming activity was less in the 5,7-DHT + 6-OHDA group vs. the 6-OHDA group.(ABSTRACT TRUNCATED AT 250 WORDS)

UI	MeSH Term	Description	Entries
D009043	Motor Activity	Body movements of a human or an animal as a behavioral phenomenon.	Activities, Motor,Activity, Motor,Motor Activities
D009055	Mouth	The oval-shaped oral cavity located at the apex of the digestive tract and consisting of two parts: the vestibule and the oral cavity proper.	Oral Cavity,Cavitas Oris,Cavitas oris propria,Mouth Cavity Proper,Oral Cavity Proper,Vestibule Oris,Vestibule of the Mouth,Cavity, Oral
D009412	Nerve Fibers	Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.	Cerebellar Mossy Fibers,Mossy Fibers, Cerebellar,Cerebellar Mossy Fiber,Mossy Fiber, Cerebellar,Nerve Fiber
D010862	Pilocarpine	A slowly hydrolyzed muscarinic agonist with no nicotinic effects. Pilocarpine is used as a miotic and in the treatment of glaucoma.	Isopilocarpine,Isoptocarpine,Ocusert,Pilocarpine Hydrochloride,Pilocarpine Mononitrate, (3S-cis)-Isomer,Pilocarpine Nitrate,Pilocarpine, Monohydrochloride, (3S-cis)-Isomer,Salagen,Hydrochloride, Pilocarpine,Nitrate, Pilocarpine
D010879	Piperazines	Compounds that are derived from PIPERAZINE.
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011985	Receptors, Serotonin	Cell-surface proteins that bind SEROTONIN and trigger intracellular changes which influence the behavior of cells. Several types of serotonin receptors have been recognized which differ in their pharmacology, molecular biology, and mode of action.	5-HT Receptor,5-HT Receptors,5-Hydroxytryptamine Receptor,5-Hydroxytryptamine Receptors,Receptors, Tryptamine,Serotonin Receptor,Serotonin Receptors,Tryptamine Receptor,Tryptamine Receptors,Receptors, 5-HT,Receptors, 5-Hydroxytryptamine,5 HT Receptor,5 HT Receptors,5 Hydroxytryptamine Receptor,5 Hydroxytryptamine Receptors,Receptor, 5-HT,Receptor, 5-Hydroxytryptamine,Receptor, Serotonin,Receptor, Tryptamine,Receptors, 5 HT,Receptors, 5 Hydroxytryptamine
D003342	Corpus Striatum	Striped GRAY MATTER and WHITE MATTER consisting of the NEOSTRIATUM and paleostriatum (GLOBUS PALLIDUS). It is located in front of and lateral to the THALAMUS in each cerebral hemisphere. The gray substance is made up of the CAUDATE NUCLEUS and the lentiform nucleus (the latter consisting of the GLOBUS PALLIDUS and PUTAMEN). The WHITE MATTER is the INTERNAL CAPSULE.	Lenticular Nucleus,Lentiform Nucleus,Lentiform Nuclei,Nucleus Lentiformis,Lentiformis, Nucleus,Nuclei, Lentiform,Nucleus, Lenticular,Nucleus, Lentiform,Striatum, Corpus
D005260	Female		Females
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