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- W2012337151 abstract "Apoptosis-inducing factor (AIF), which exerts its effect via a caspase-independent pathway, has been suggested to be a mediator of cell injury. We have recently identified the expression of AIF in human coronary artery endothelial cells (HCAECs). The present study was designed to determine the pathophysiological role of AIF in oxidized low-density lipoprotein (ox-LDL)-induced apoptosis of HCAECs. The cells were cultured and treated with ox-LDL (40 μg/ml) for 24 h. Ox-LDL increased AIF expression, caused apoptosis of HCAECs (determined by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling staining and large-scale DNA fragmentation), and induced translocation of AIF from the cytoplasm to the nucleus (fluorescence immunocytochemistry). Pretreatment of HCAECs with a caspase inhibitor (ZVAD-fmk) did not influence AIF-mediated apoptosis in response to ox-LDL. We developed a specific antisense oligonucleotide targeted to the 5′-TCG CCG AAA TGT TCC GGT GTG GA-3′ portion of the human AIF mRNA sequence (AIF-AS) to bind a complementary sequence overlapping the translational start site. Pretreatment of cells with the AIF-AS for 24 h resulted in suppression of ox-LDL-upregulated AIF protein, as measured by immunoblot analysis. AIF-AS also reduced apoptosis and AIF translocation ( P < 0.01 vs. ox-LDL alone). Next, we constructed a recombinant AIF plasmid by inserting whole-length AIF cDNA into the expression vector pcDNA3.1 with a cytomegalovirus promoter. HCAECs transfected with plasmid showed a two- to fourfold increase in AIF expression, extensive apoptosis, and translocation of AIF from the cytoplasm to the nucleus. These results from two approaches indicate that AIF plays an important role in ox-LDL-induced endothelial injury." @default.
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- W2012337151 date "2004-01-01" @default.
- W2012337151 modified "2023-09-27" @default.
- W2012337151 title "Role of AIF in human coronary artery endothelial cell apoptosis" @default.
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- W2012337151 doi "https://doi.org/10.1152/ajpheart.00579.2003" @default.
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