骨基质的糖氧化调节矿化过程
Samuel J Stephen1,2, Grażyna E Sroga2, Deepak Vashishth1,2,3
1Department of Biomedical Engineering.
概括
先进的糖化和糖氧化产品,如炭甲基氨酸 (CML),增加骨矿化和改变骨质在2型糖尿病 (T2D). 向CML可能会降低T2D患者的骨折风险.
科学领域:
- 生物材料科学 生物材料科学
- 骨生物学 骨生物学 骨生物学
- 代谢疾病 代谢疾病
背景情况:
- 2型糖尿病 (T2D) 与骨折风险增加有关,尽管骨矿物质密度正常或高.
- T2D会增加氧化应激和高血糖,促进骨中先进的糖化终产物 (AGEs) 和先进的糖氧化终产物 (AGOEs).
- 碳氧甲基氨酸 (CML),一种AGOE,与骨折风险有关,可能会影响骨矿化.
研究的目的:
- 调查糖氧化影响骨矿化机制.
- 确定CML积累如何影响2型糖尿病背景下的骨质.
主要方法:
- 来自各种捐赠者的人骨段在体外处理,以增强AGE和CML含量.
- 拉曼光谱,固态核磁共振 (NMR) 和X射线衍射被用来分析矿物质的生长和结构.
- 纳米印评估了硬度和工作能量等机械性能.
主要成果:
- AGE和CML增强增加了骨矿化程度,加速了矿物质成熟.
- 在CML增强的骨中,矿物质生长的增长最为显著.
- CML增加了原和矿物质表面的电子阴性,导致更高的压力应变和改变的机械性能 (硬度更低,工作能量更高).
结论:
- 糖氧化,特别是CML积累,提供了一种机制,将T2D与改变的骨矿化和骨质质量受损联系起来.
- CML直接影响骨基质矿化,影响其结构完整性.
- 制定针对CML积累的策略对于减轻2型糖尿病患者骨折风险至关重要.
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