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High glucose derived endothelial microparticles increase active caspase-3 and reduce microRNA-Let-7a expression in endothelial cells.

ABSTRACT: The experimental aim of this study was to determine the effects of high glucose-induced endothelial microparticles (EMPs) on endothelial cell susceptibility to apoptosis. Human umbilical vein endothelial cells (HUVECs) were cultured (3rd passage) and plated in 6-well plates at a density of 5.0 × 105 cells/condition. Cells were incubated with media containing 25 mM d-glucose (concentration representing a diabetic glycemic state) or 5 mM d-glucose (normoglycemic condition) for 48 h to generate EMPs. EMP identification (CD144+ expression) and concentration was determined by flow cytometry. HUVECs (3 × 106 cells/condition) were treated with EMPs generated from either the normal or high glucose conditions for 24 h. Intracellular concentration of active caspase-3 was determined by enzyme immunoassay. Cellular expression of miR-Let7a, an anti-apoptotic microRNA, was determined by RT-PCR using the ??CT normalized to RNU6. High glucose-derived EMPs significantly increased both basal (1.5 ± 0.1 vs 1.0 ± 0.1 ng/mL) and staurosporine-stimulated (2.2 ± 0.2 vs 1.4 ± 0.1 ng/mL) active caspase-3 compared with normal glucose EMPs. Additionally, the expression of miR-Let-7a was markedly reduced (?140%) by high glucose EMPs (0.43 ± 0.17 fold vs control). These results demonstrate that hyperglycemic-induced EMPs increase endothelial cell active caspase-3. This apoptotic effect may be mediated, at least in part, by a reduction in miR-Let-7a expression.

SUBMITTER: Bammert TD

PROVIDER: S-EPMC5652070 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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High glucose derived endothelial microparticles increase active caspase-3 and reduce microRNA-Let-7a expression in endothelial cells.

Bammert Tyler D TD Hijmans Jamie G JG Reiakvam Whitney R WR Levy Ma'ayan V MV Brewster Lillian M LM Goldthwaite Zoe A ZA Greiner Jared J JJ Stockelman Kelly A KA DeSouza Christopher A CA

Biochemical and biophysical research communications 20170920 2

The experimental aim of this study was to determine the effects of high glucose-induced endothelial microparticles (EMPs) on endothelial cell susceptibility to apoptosis. Human umbilical vein endothelial cells (HUVECs) were cultured (3rd passage) and plated in 6-well plates at a density of 5.0 × 10<sup>5</sup> cells/condition. Cells were incubated with media containing 25 mM d-glucose (concentration representing a diabetic glycemic state) or 5 mM d-glucose (normoglycemic condition) for 48 h to g ...[more]

PMID: 28942148

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Dataset Information

High glucose derived endothelial microparticles increase active caspase-3 and reduce microRNA-Let-7a expression in endothelial cells.

Publications

High glucose derived endothelial microparticles increase active caspase-3 and reduce microRNA-Let-7a expression in endothelial cells.

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