Artículo
Pharmacokinetic disposition of triclabendazole in cattle and sheep; discrimination of the order and the rate of the absorption process of its active metabolite triclabendazole sulfoxide
Mestorino, N.; Formentini, Enrique Antonio; Lucas, Mariana Florencia
; Fernandez, C.; Modamio, P.; Mariño Hernández, E.; Errecalde, J. O.
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
02/2008
Editorial:
Springer
Revista:
Veterinary Research Communications
ISSN:
0165-7380
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A comparative pharmacokinetic study was conducted to determine the order and the rate of absorption of triclabendazole (TCBZ) in cattle and sheep. A commercial suspension of TCBZ (Biofasiolex, Biogénesis S.A., Argentina) was administered at a dose rate of 10 mg/kg by the oral route to six Holstein female calves and six Corriedale female sheep. The plasma concentration profiles of the metabolites triclabendazole sulfoxide (TCBZ-SO) and triclabendazole sulfone (TCBZ-SO(2)) were analysed by means of the non-compartmental method. The order of the absorption process of the active metabolite, TCBZ-SO, was determined by construction of curves of cumulative absorbed fraction of the drug by means of the Wagner-Nelson method. The appearance of TCBZ-SO in plasma of cattle and sheep resembles the entry of a constant quantity of drug into the organism per unit time. This is explained by the reservoir effect of the rumen, which acts as a biological slow-release system for TCBZ-SO and its precursor TCBZ to the posterior digestive tract where they are absorbed. The plasma concentration profiles of TCBZ-SO in both species were well described by a one-compartment open model with zero-order process of absorption and first-order process of elimination. The values of AUC(0-infinity) and C(max) of TCBZ-SO did not differ between species, while other kinetic parameters except for lambda(z) had higher values in calves than in sheep. In the case of TCBZ-SO(2), t(max) was the only parameter that did not differ between species, while other kinetic parameters except for lambda(z) had higher values in calves than in sheep.
Palabras clave:
Pharmacokinetic
,
Triclabendazole
,
Cattle
,
Sheep
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Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Mestorino, N.; Formentini, Enrique Antonio; Lucas, Mariana Florencia; Fernandez, C.; Modamio, P.; et al.; Pharmacokinetic disposition of triclabendazole in cattle and sheep; discrimination of the order and the rate of the absorption process of its active metabolite triclabendazole sulfoxide; Springer; Veterinary Research Communications; 32; 1; 2-2008; 21-33
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