Biomaterial Database

Conjugation of phenylacetic acid and m- and p-hydroxyphenylacetic acids in the rat striatum. 1993

L E Dyck, and D A Durden, and A A Boulton

Department of Psychiatry, University of Saskatchewan, Saskatoon, Canada.

Two factors that might regulate the levels of the trace acids, phenylacetic acid (PAA), m-hydroxyphenylacetic acid (mHPAA) and p-hydroxyphenylacetic acid (pHPAA) in the rat striatum were investigated: first, formation of conjugates of these acids and second, transport out of the brain by a probenecid-sensitive system. The presence of conjugates of these acids was investigated by subjecting homogenates of rat striatum to hydrolysis. The concentrations of PAA were increased ten-fold by hydrolysis, pHPAA increased two-fold, and mHPAA was unaffected. These findings coupled with the failure of parglyline to decrease free or total PAA levels suggest that conjugation of PAA is an important factor regulating free PAA levels. The transport inhibitor, probenecid, increased the concentrations of free mHPAA, free pHPAA and the total concentrations of all three acids indicating that all three trace acids can be removed from the rat brain by a transport system.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D010648	Phenylacetates	Derivatives of phenylacetic acid. Included under this heading are a variety of acid forms, salts, esters, and amides that contain the benzeneacetic acid structure. Note that this class of compounds should not be confused with derivatives of phenyl acetate, which contain the PHENOL ester of ACETIC ACID.	Benzeneacetates,Benzeneacetic Acids,Phenylacetic Acids,Acids, Benzeneacetic,Acids, Phenylacetic
D011339	Probenecid	The prototypical uricosuric agent. It inhibits the renal excretion of organic anions and reduces tubular reabsorption of urate. Probenecid has also been used to treat patients with renal impairment, and, because it reduces the renal tubular excretion of other drugs, has been used as an adjunct to antibacterial therapy.	Benecid,Benemid,Benuryl,Pro-Cid,Probecid,Probenecid Weimer
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
D006863	Hydrogen-Ion Concentration	The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH	pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D006868	Hydrolysis	The process of cleaving a chemical compound by the addition of a molecule of water.
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
D017208	Rats, Wistar	A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.	Wistar Rat,Rat, Wistar,Wistar Rats
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