Pharmacokinetics of Uridine Following Ocular, Oral and Intravenous Administration in Rabbits
Biomolecules & Therapeutics
;
: 170-172, 2013.
Artículo
en Inglés
| WPRIM
| ID: wpr-201015
ABSTRACT
The pyrimidine nucleoside uridine has recently been reported to have a protective effect on cultured human corneal epithelial cells, in an animal model of dry eye and in patients. In this study, we investigate the pharmacokinetic profile of uridine in rabbits, following topical ocular (8 mg/eye), oral (450 mg/kg) and intravenous (100 mg/kg) administration. Blood and urine samples were serially taken, and uridine was measured by high-performance liquid chromatography-tandem mass spectrometry. No symptoms were noted in the animals after uridine treatment. Uridine was not detected in either plasma or urine after topical ocular administration, indicating no systemic exposure to uridine with this treatment route. Following a single intravenous dose, the plasma concentration of uridine showed a bi-exponential decay, with a rapid decline over 10 min, followed by a slow decay with a terminal half-life of 0.36 +/- 0.05 h. Clearance and volume of distribution were 1.8 +/- 0.6 L/h/kg and 0.58 +/- 0.32 L/kg, respectively. The area under the plasma concentration-time curves (AUC) was 59.7 +/- 18.2microg.hr/ml, and urinary excretion up to 12 hr was ~7.7% of the dose. Plasma uridine reached a peak of 25.8 +/- 4.1 microg/ml at 2.3 +/- 0.8 hr after oral administration. The AUC was 79.0 +/- 13.9 microg.hr/ml, representing ~29.4% of absolute bioavailability. About 1% of the oral dose was excreted in the urine. These results should prove useful in the design of future clinical and nonclinical studies conducted with uridine.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Plasma
/
Espectrometría de Masas
/
Uridina
/
Farmacocinética
/
Disponibilidad Biológica
/
Administración Oral
/
Área Bajo la Curva
/
Modelos Animales
/
Células Epiteliales
/
Administración Oftálmica
Tipo de estudio:
Estudio pronóstico
Límite:
Animales
/
Humanos
Idioma:
Inglés
Revista:
Biomolecules & Therapeutics
Año:
2013
Tipo del documento:
Artículo
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