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Cardiovascular Drugs and Therapy
Erschienen in: Cardiovascular Drugs and Therapy 5/2014

01.10.2014 | ORIGINAL ARTICLE

PTEN Upregulation May Explain the Development of Insulin Resistance and Type 2 Diabetes with High Dose Statins

verfasst von: Yochai Birnbaum, Manjyot K. Nanhwan, Shukuan Ling, Jose R. Perez-Polo, Yumei Ye, Mandeep Bajaj

Erschienen in: Cardiovascular Drugs and Therapy | Ausgabe 5/2014

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Abstract

Purpose

Statins increase the incidence of new onset diabetes. Prolonged statin therapy upregulates PTEN expression. PTEN levels are also elevated in diabetic animals. Activation of protein kinase A by cAMP decreases PTEN expression. We assessed whether prolonged treatment with rosuvastatin (ROS) induces glucose intolerance by upregulating Phosphatase and Tensin Homologue on Chromosome 10 (PTEN) in mice receiving normal (ND) or Western Diet (WD) and whether concomitant treatment with cilostazol (CIL, a phosphodiesterase-3 inhibitor) attenuates the effects.

Methods

PTENloxp/cre or PTEN+/− mice received ND or WD without or with ROS (10 mg/kg/day). Wild-type mice received ND or WD without or with ROS, CIL (10 mg/kg/day), or ROS+CIL for 30 days. Fasting insulin and glucose tolerance test were measured as well as PTEN and P-AKT levels in skeletal muscle.

Results

Serum glucose after intraperitoneal injection of glucose was higher in PTENloxp/cre mice receiving WD or ROS and especially WD+ROS. Levels were lower in PTEN+/− mice compared to PTENloxp/cre in each treatment group. CIL decreased glucose levels in mice receiving WD, ROS and their combination. Insulin levels were higher in the WD+ROS group. CIL decreased insulin in mice receiving WD+ROS. WD, ROS and especially their combination increased PTEN and decreased P-AKT levels. CIL attenuated the effect of WD, ROS and their combination.

Conclusions

Long-term ROS can induce diabetes by upregulating PTEN. CIL attenuates these changes. Partial knockdown of PTEN also ameliorates ROS-induced insulin resistance. Further studies are needed to assess the effects of increasing cAMP levels to prevent the induction of diabetes by statins.
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Metadaten
Titel
PTEN Upregulation May Explain the Development of Insulin Resistance and Type 2 Diabetes with High Dose Statins
verfasst von
Yochai Birnbaum
Manjyot K. Nanhwan
Shukuan Ling
Jose R. Perez-Polo
Yumei Ye
Mandeep Bajaj
Publikationsdatum
01.10.2014
Verlag
Springer US
Erschienen in
Cardiovascular Drugs and Therapy / Ausgabe 5/2014
Print ISSN: 0920-3206
Elektronische ISSN: 1573-7241
DOI
https://doi.org/10.1007/s10557-014-6546-5

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