Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1990-6-7
pubmed:abstractText
1. The steps involved in determining the chirality of the mandelic acid excreted by rats after administration of ethylbenzene and styrene were investigated by studying the fate of racemic, (R)- and (s)1,2-phenylethanediol, a precursor of mandelic acid. These investigations indicate the occurrence of two alternative routes of metabolism for 1,2-phenylethanediol, one involving retention of configuration and the other resulting in the loss of the chiral centre. 2. The stereoselectivity of the disposition of mandelic acid was investigated; rats were dosed with mandelic acid either as the racemate or as the individual enantiomers, G.1.c.-mass spectrometry and h.p.l.c. were used to determine the enantiomers of mandelic acid. 3. There were at least two routes by which mandelic acid could be metabolized and/or excreted; there is a stereoselective pathway in rat for (s)-mandelic acid, which gives rise to phenylglyoxylic acid. 4. The chiral inversion of (s)-mandelic acid to (R)-mandelic acid is reported; although this has been observed in bacteria it has not previously been observed in mammals. 5. The extent to which mandelic acid is metabolized to phenylglyoxylic acid is dependent on the enantiomeric composition of the mandelic acid administered. There is no evidence to indicate significant ketone-alcohol conversion, that is phenylglyoxylic acid is not significantly reduced to mandelic acid in vivo.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0049-8254
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
159-68
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
The stereoselectivity of 1,2-phenylethanediol and mandelic acid metabolism and disposition in the rat.
pubmed:affiliation
Occupational Medicine and Hygiene Laboratories, London, UK.
pubmed:publicationType
Journal Article, Comparative Study