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- W2000705032 abstract "Restenosis represents a major impediment to the success of coronary angioplasty. Abnormal proliferation of vascular smooth muscle cells (VSMCs) has been shown to be an important process in the pathogenesis of restenosis. A number of agents, particularly rapamycin and paclitaxel, have been shown to impact on this process. This study was carried out to determine the mechanisms of cytotoxicity of goniothalamin (GN) on VSMCs. Results from MTT cytotoxicity assay showed that the IC50 for GN was 4.4 μg/ml (22 μM), which was lower compared to the clinically used rapamycin (IC50 of 25 μg/ml [27.346 μM]). This was achieved primarily via apoptosis where up to 25.83 ± 0.44% of apoptotic cells were detected after 72 h treatment with GN. In addition, GN demonstrated similar effects as rapamycin in inhibiting VSMCs proliferation using bromodeoxyuridine (BrdU) cell proliferation assay after 72 h treatment at IC50 concentration (p > 0.05). In order to understand the mechanisms of GN, DNA damage detection using comet assay was determined at 2 h post-treatment with GN. Our results showed that there was a concentration-dependent increase in DNA damage in VSMCs prior to cytotoxicity. Moreover, GN effects were comparable to rapamycin. In conclusion, our data show that GN initially induces DNA damage which subsequently leads to cytotoxicity primarily via apoptosis in VSMCs." @default.
- W2000705032 created "2016-06-24" @default.
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- W2000705032 date "2006-02-01" @default.
- W2000705032 modified "2023-10-13" @default.
- W2000705032 title "Goniothalamin induces apoptosis in vascular smooth muscle cells" @default.
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- W2000705032 doi "https://doi.org/10.1016/j.cbi.2005.10.107" @default.
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