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- W1968697989 abstract "Homocysteine (Hcy) is a risk factor for vascular dysfunction. High levels of Hcy may result in vascular injury accelerating atherosclerosis leading to ischemia. After ischemia, endothelial progenitor cells (EPCs) migrate from bone marrow to repair damaged sites either through direct incorporation of EPCs or by repopulating mature endothelial cells. This study looks into the relationship between increased Hcy in patients with cerebrovascular disease (CVD) and EPCs. Some patients with hyperhomocysteinemia were treated with B vitamins to evaluate if the treatment reverses the elevated Hcy and its impact on their EPC levels. EPCs were treated with Hcy to determine the in vitro effects of Hcy. Our clinical findings show that elevated Hcy levels have an inverse relationship with EPC levels and B vitamin intervention can reverse this effect. Our in vitro work shows that Hcy-mediated EPC toxicity is due to apoptosis involving caspase-8, cytochrome c release, and caspase-3 activation. Vitamin B(6), and B(9) significantly impair Hcy-mediated EPC caspase-3 activation in vitro. Our clinical and in vitro data together indicate that increased Hcy results in a decrease in EPC numbers. This decrease in EPC by Hcy may be occurring through increased apoptosis and B vitamins (B(6), B(9)) intervention can attenuate such effects." @default.
- W1968697989 created "2016-06-24" @default.
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- W1968697989 date "2008-09-03" @default.
- W1968697989 modified "2023-10-14" @default.
- W1968697989 title "Homocysteine Reduces Endothelial Progenitor Cells in Stroke Patients through Apoptosis" @default.
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- W1968697989 doi "https://doi.org/10.1038/jcbfm.2008.99" @default.
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