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• W2004476466 abstract "Vascular endothelial growth factor (VEGF) has been reported not only to induce angiogenesis within the bone marrow, but also directly stimulate the proliferation and survival of multiple myeloma cells, thus being involved in the development and progression of this second most common hematological malignancy. We, along with others, have found that pigment epithelium-derived factor (PEDF) has anti-angiogenic and anti-vasopermeability properties both in cell culture and animal models by counteracting the biological actions of VEGF. However, effects of PEDF on VEGF-exposed myeloma cells remain unknown. In this study, we examined whether and how PEDF could inhibit the VEGF-induced proliferation and survival of myeloma cells. PEDF, a glutathione peroxidase mimetic, ebselen, or an inhibitor of NADPH oxidase, diphenylene iodonium significantly inhibited the VEGF-induced reactive oxygen species (ROS) generation, increase in anti-apoptotic and growth-promoting factor, myeloid cell leukemia 1 (Mcl-1) expression, and proliferation in U266 myeloma cells. VEGF blocked apoptosis of multiple myeloma cells isolated from patients, which was prevented by PEDF. PEDF also reduced p22phox levels in VEGF-exposed U266 cells. Furthermore, overexpression of dominant-negative human Rac-1 mutant mimicked the effects of PEDF on ROS generation and Mcl-1 expression in U266 cells. Our present study suggests that PEDF could block the VEGF-induced proliferation and survival of multiple myeloma U266 cells through its anti-oxidative properties via suppression of p22phox, one of the membrane components of NADPH oxidase. Suppression of VEGF signaling by PEDF may be a novel therapeutic target for multiple myeloma." @default.
• W2004476466 created "2016-06-24" @default.
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• W2004476466 date "2013-02-01" @default.
• W2004476466 modified "2023-09-23" @default.
• W2004476466 title "Pigment epithelium-derived factor (PEDF) inhibits survival and proliferation of VEGF-exposed multiple myeloma cells through its anti-oxidative properties" @default.
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• W2004476466 doi "https://doi.org/10.1016/j.bbrc.2013.01.057" @default.
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