Altered Intestinal P-glycoprotein Expression Levels Affect Pharmacodynamics under Diabetic Condition

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[Altered intestinal P-glycoprotein expression levels affect pharmacodynamics under diabetic condition].

P-glycoprotein (P-gp), one of the important drug-efflux pumps, is known to affect pharmacokinetics and pharmacodynamics of P-gp substrate drugs. We have previously reported that intestinal P-gp expression levels are transiently decreased in streptozotocin (STZ)-induced type 1 diabetic mouse model. Herein, we examined the analgesic effects of orally administered morphine and its pharmacokinetic ...

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Regulatory action of nitric oxide synthase on ileal P-glycoprotein expression under streptozotocin-induced diabetic condition.

P-glycoprotein (P-gp), a drug efflux transporter, affects the pharmacokinetics of a wide range of substrate drugs. Our previous study clearly revealed that intestinal P-gp expression levels were decreased via an inducible nitric oxide synthase (iNOS)-mediated mechanism in the early phases of diabetes. Here, we focused on changes in ileal P-gp expression and the influences of NOS on the P-gp exp...

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Altered intracellular pH regulation in cells with high levels of P-glycoprotein expression.

P-glycoprotein is an ATP-binding-cassette transporter that pumps many structurally unrelated drugs out of cells through an ATP-dependent mechanism. As a result, multidrug-resistant cells that overexpress P-glycoprotein have reduced intracellular steady-state levels of a variety of chemotherapeutic agents. In addition, increased cytosolic pH has been a frequent finding in multidrug-resistant cel...

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P-Glycoprotein Altered Expression in Alzheimer's Disease: Regional Anatomic Variability

We investigated the expression of P-glycoprotein (P-gp) in brain samples of Alzheimer disease (AD) and normative brains (NM). Superior temporal cortex hippocampal and brainstem samples from 15 AD and NM brains were selected from comparable sites. P-gp positive capillaries and β-amyloid (Aβ) senile plaques (SP) were counted. Statistical analysis of the data was performed using nonparametric data...

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Intestinal P-glycoprotein expression is multimodally regulated by intestinal ischemia-reperfusion.

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 experi...

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ژورنال

عنوان ژورنال: YAKUGAKU ZASSHI

سال: 2012

ISSN: 0031-6903,1347-5231

DOI: 10.1248/yakushi.132.161