A comparative study was carried out to examine urinary excretion of D-glucaric acid (DGA), g-glutamyltransferase (GGT) activity and the concentration of serum bilirubin as enzymatic induction markers in 89 adult patients (56 men and 33 women) who were receiving chronic treatment with phenobarbital, phenytoin, carbamazepine and valproate. As in most cases, these drugs were administered as a polytherapy; drugs doses were expressed in units/day, in accordance with a previously described system of scoring, which would reflect the induction capacity of the combination of drugs administered. We found a high prevalence of results that were above the upper reference limit for urinary DGA (93.2%) and serum GGT (80.6%). Bilirubin and its conjugate and non-conjugate fractions were found to offer values that to a large extent matched those of the control group. The levels of the different biochemical variables presented significant correlations with the daily doses of the drugs administered, above all in the case of DGA (r= 0.773, p< 0.001). When we split the data according to sex, the correlations improved in men but were significantly worse in women. This fact could be due to a greater inter-individual variability in the response to inducers of the phenobarbital type in female patients. Urinary DGA seems to be a better enzymatic induction marker than GGT and bilirubin and its serum fractions, the value of which appeared to be very limited in these cases. Separating GGT into its isoforms provided no further information of practical interest as regards the enzymatic activity as a whole.
KeywordsAntiepileptic drugsBilirubinD-glucaric acidEnzymatic formsEnzymatic inductiong-glutamyltransferaseCategoriesEpilepsias y síndromes epilépticos
FULL TEXT(solo disponible en lengua castellana / Only available in Spanish)
Si ya es un usuario registrado en Neurologia, introduzca sus datos de inicio de sesión.
Rellene los campos para registrarse en Neurologia.com y acceder a todos nuestros artículos de forma gratuita
¿Olvidó su contraseña? Introduzca su correo electrónico y le haremos llegar una nueva
¡CONVIÉRTASE EN USUARIO PREMIUM DE NEUROLOGIA.COM!
Al hacerse premium, está apoyándonos para que Revista de Neurología
siga siendo uno de los referentes de habla hispana en la difusión del
conocimiento en neurociencias. ¡Gratuita tanto para autores como para
todos los usuarios de la web!
Además, por convertirte en usuario premium, recibirá las siguientes ventajas:
Plaza asegurada en todos nuestros Másteres (www.ineurocampus.com)
Descuento del 5% en los cursos de “Actualización en Neurología”, la FMC que estará disponible próximamente en la web.
Descarga gratuita en formato PDF dos de las obras con más éxito publicadas por Viguera Editores:
Oromotors Disorders in childhood (M. Roig-Quilis; L. Pennington)
Manual de Neuropsicología 2ª ed. (J. Tirapu-Ustárroz; M. Ríos-Lago; F. Maestú)
El precio para hacerse Premium durante el periodo de un año es de 5€, que podrá pagar a continuación a través de una pasarela de pago seguro con tarjeta de crédito, transferencia bancaria o PayPal: