Chiral Inversion of (R)-Ketoprofen: Influence of Age and Differing Physiological Status in Dairy Cattle
The chiral inversion of ketoprofen has been previously demonstrated in cattle, but no studies have been performed on different ages and metabolic situations in the animals. The aim of this work was to study any modifications of the stereoconversion of ketoprofen that occur by reason of age, lactatio...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2002 |
| País: | Argentina |
| Recursos: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositório: | CONICET Digital (CONICET) |
| Idioma: | inglês |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/106489 |
| Acesso em linha: | http://hdl.handle.net/11336/106489 |
| Access Level: | Acceso aberto |
| Palavra-chave: | AGE CATTLE CHIRAL INVERSION ENANTIOMER GESTATION KETOPROFEN LACTATION https://purl.org/becyt/ford/3.1 https://purl.org/becyt/ford/3 https://purl.org/becyt/ford/4.3 https://purl.org/becyt/ford/4 |
| Resumo: | The chiral inversion of ketoprofen has been previously demonstrated in cattle, but no studies have been performed on different ages and metabolic situations in the animals. The aim of this work was to study any modifications of the stereoconversion of ketoprofen that occur by reason of age, lactation or gestation in dairy cows. Holando Argentino cattle were divided into three groups: 8 cows in early lactation, 8 pregnant cows and 8 newborn calves. Four animals from each group received the enantiomer R-(−)-ketoprofen by intravenous administration; the other four animals received the S-(+) enantiomer, all at doses of 0.5 mg/kg. Blood samples were collected at standardized times after dosing and assayed for ketoprofen by high-performance reversed-phase liquid chromatography (HPLC). The percentage inversion of R-(−)-ketoprofen to S-(+)-ketoprofen was 50.5% (SD ± 2.4) in the preruminants, 33.3% (SD ± 1.7) in cows in early lactation and 26.0% (SD ± 5.1) in cows in gestation. These results indicate a differing enantioselective metabolic behaviour for one compound in one species under different physiological situations. |
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