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在无脂蛋白E缺乏的小鼠中,脆弱的动脉样硬化斑块形态无法制造甲酸
1Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC 27599-7125, USA.
Circulation
|March 27, 2002
概括
慢性维生素C缺乏在小鼠中没有影响动脉样硬化斑块大小,但危害了原蛋白,增加了脆弱性. 这项研究强调了维生素C.
科学领域:
- 生物医学研究的研究.
- 心血管科学 心血管科学
- 营养科学 营养科学
背景情况:
- 氧化压力有助于动脉样硬化,这表明抗氧化剂可以预防冠状动脉疾病.
- 维生素C在人类动脉样硬化中的作用是有争议的,缺乏严格的动物试验.
研究的目的:
- 调查慢性维生素C缺乏是否影响动脉样硬化的开始和发展.
- 在小鼠模型中评估维生素C水平对动脉样硬化斑块形态和稳定性的影响.
主要方法:
- 使用了Gulo{-/-) Apoe{-/-) 小鼠,它们需要食维生素C,易患动脉样硬化.
- 给6周大小的小鼠服用不同度的维生素C饮食 (低度与高度).
- 分析了动脉样硬化斑块的大小,原蛋白含量,死核大小和随机变化.
主要成果:
- 动脉样硬化斑块的大小在低维生素C和高维生素C组之间是相似的.
- 低维生素C的小鼠在晚期斑块中显著减少了原沉积.
- 维生素C 缺乏导致了较大的死核,并减少了纤维增殖和新血管.
结论:
- 慢性维生素C缺乏不会改变动脉样硬化开始或进展.
- 维生素C缺乏会损害原沉积,造成潜在的脆弱斑块.
- 研究结果表明,维生素C在维持斑块稳定性方面的作用,而不是防止斑块形成.
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