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- W2310341853 abstract "At high concentrations, polyphenols induce cell death, and the polyphenols-rich pomegranate juice (PJ), known for its antioxidative/antiatherogenic properties, can possibly affect cell death, including macrophage death involved in atherogenesis. In the present study, apoptotic/necrotic macrophage death was analyzed in J774A.1 macrophages and in peritoneal macrophages isolated from atherosclerotic apoE-/- mice treated with PJ. The effects of PJ were compared with those of the free radical generator 2, 2'-azobis (2-amidinopropane) dihydrochloride (AAPH). Both PJ and AAPH significantly increased J774A.1 macrophage death; however, flow cytometric and microscopic analyses using annexin V/propidium iodide revealed that PJ increased the early apoptosis of the macrophage dose dependently (up to 2.5-fold, P < 0.01), whereas AAPH caused dose-dependent increases in late apoptosis/necrosis (up to 12-fold, P < 0.001). Unlike PJ, AAPH-induced macrophage death was associated with increased intracellular oxidative stress (up to 7-fold, P < 0.001) and with lipid stress demonstrated by triglyceride accumulation (up to 3-fold, P < 0.01) and greater chromatic vesicle response to culture medium (up to 5-fold, P < 0.001). Accordingly, recombinant paraoxonase 1, which hydrolyzes oxidized lipids, attenuated macrophage death induced by AAPH, but not by PJ. Similar apoptotic and oxidative effects were found in macrophages from apoE-/- mice treated with PJ or AAPH. As macrophage apoptotic/necrotic death has considerable impact on atherosclerosis progression, these findings may provide novel mechanisms for the antiatherogenicity of PJ." @default.
- W2310341853 created "2016-06-24" @default.
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- W2310341853 date "2016-08-01" @default.
- W2310341853 modified "2023-10-05" @default.
- W2310341853 title "Pomegranate Juice Polyphenols Induce Macrophage Death via Apoptosis as Opposed to Necrosis Induced by Free Radical Generation: A Central Role for Oxidative Stress" @default.
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- W2310341853 doi "https://doi.org/10.1097/fjc.0000000000000391" @default.
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