Intestinal P-glycoprotein expression is multimodally regulated by intestinal ischemia-reperfusion.
J Pharm Pharm Sci
; 17(2): 266-76, 2014.
Article
en En
| MEDLINE
| ID: mdl-24934555
ABSTRACT
PURPOSE:
Reactive oxygen species (ROS) have multiple physiological effects that are amount-dependent. ROS are one of the causes of intestinal ischemia-reperfusion (I/R) injury. In this study, we investigated whether the amount of ROS and the degree of intestinal I/R injury affect the expression level of P-glycoprotein (P-gp).METHODS:
. We used hydrogen peroxide (H2O2) as ROS in in vitro experiments. Intestinal I/R model rats, which were subjected 15-min ischemia (I/R-15), were used in in vivo experiments.RESULTS:
P-gp expression in Caco-2 cells was increased in response to 1 µM of H2O2 but decreased upon exposure to 10 mM of H2O2. We previously reported that P-gp expression is decreased after intestinal I/R with 30-min ischemia (I/R-30), which time a large amount of ROS is generated. I/R-15 induced slightly less mucosal and oxidative injury than did I/R-30. P-gp expression in the jejunum was increased at 1 h after I/R-15, and ileal paracellular permeability was increased. The blood concentration of tacrolimus, a P-gp substrate, was lower during 0-20 min but was higher during 40-90 min post-administration compared with that in the sham-operated rats. P-gp expression in the ileum was decreased at 6 h after I/R-15, due to abnormal localization of P-gp, resulting in a high blood tacrolimus concentration in rats reperfused for 6 h.CONCLUSIONS:
ROS multimodally regulate P-gp expression depending on its amount. This is important for understanding the pattern of P-gp expression after intestinal I/R.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Daño por Reperfusión
/
Miembro 1 de la Subfamilia B de Casetes de Unión a ATP
/
Mucosa Intestinal
/
Intestinos
Límite:
Animals
/
Humans
/
Male
Idioma:
En
Revista:
J Pharm Pharm Sci
Asunto de la revista:
FARMACIA
/
FARMACOLOGIA
Año:
2014
Tipo del documento:
Article