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Published on: June 3, 2016
Upregulation of PEDF expression by PARP inhibition contributes to the decrease in hyperglycemia-induced apoptosis in
Haibing Chen1, Weiping Jia, Xun Xu
1Shanghai Clinical Center for Diabetes Shanghai Diabetes Institute, Department of Endocrinology and Metabolism of Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China.
Poly(ADP-ribose)polymerase (PARP) inhibitors upregulate pigment epithelium-derived factor (PEDF) expression in endothelial cells. This suggests PEDF is a potential target for PARP inhibition therapies, influencing cell growth context-dependently.
Area of Science:
- Endothelial cell biology
- Molecular oncology
- Angiogenesis research
Background:
- Poly(ADP-ribose)polymerase (PARP) inhibitors are known to reduce angiogenesis by inhibiting vascular endothelium growth factor (VEGF).
- Pigment epithelium-derived factor (PEDF) is a potent endogenous inhibitor of angiogenesis, contrasting with VEGF's pro-angiogenic role.
Purpose of the Study:
- To investigate the effect of PARP inhibition on pigment epithelium-derived factor (PEDF) expression in human umbilical vein endothelial cells (HUVECs).
- To determine if PEDF is a potential therapeutic target for PARP inhibition treatments.
Main Methods:
- Treatment of HUVECs with a specific PARP inhibitor (PJ-34) or PARP antisense oligonucleotide.
- Dose-dependent analysis of PEDF expression.
- Assessment of p38 MAP kinase activation and cell apoptosis.
Main Results:
- PARP inhibition significantly upregulated hyperglycemia-induced PEDF expression in HUVECs in a dose-dependent manner.
- PARP inhibition led to reduced activation of p38 MAP kinase.
- A concomitant decrease in endothelial cell apoptosis was observed.
Conclusions:
- Pigment epithelium-derived factor (PEDF) represents a novel target for Poly(ADP-ribose)polymerase (PARP) inhibition therapies.
- The effects of PEDF on endothelial cell growth are context-dependent, highlighting its complex role in angiogenesis.
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