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核糖基化诱导的晚期糖基化终产物增加对人皮质骨力学性能的影响有限。

Ribosylation-induced increase in advanced glycation end products has limited impacts on mechanical properties in human cortical bone.

作者信息

Gallagher Katelynn R, White Olivia N, Tomaschke Andrew A, Segvich Dyann M, Wallace Joseph M

机构信息

Weldon School of Biomedical Engineering, Department of Purdue University, 723 W Michigan St (SL220), Indianapolis, IN, USA 46202.

出版信息

Bone Rep. 2025 Apr 2;25:101841. doi: 10.1016/j.bonr.2025.101841. eCollection 2025 Jun.

Abstract

Diabetes affects over 38 million individuals in the U.S. and is associated with a heightened risk of fractures despite normal or elevated bone mineral density (BMD). This increased fracture susceptibility may be linked to the accumulation of advanced glycation end products (AGEs), which are theorized to compromise bone quality by stiffening the collagen network, leading to tissue embrittlement. In this study, the mechanical effects of AGE accumulation in human cortical bone were evaluated . Bone beams, derived from a human femur, were incubated in a ribose solution to induce AGE accumulation, while control beams were incubated in a control solution. Dynamic Mechanical Analysis (DMA) and three-point bending tests were conducted to assess the mechanical properties of the bone beams. Fluorescent AGE analysis was performed to quantify and compare AGE levels between the groups. The study found no significant differences in mechanical properties between the control and ribose-treated groups, despite a significant elevation in normalized AGE content in the ribose group. These results suggest that AGE accumulation may have a weaker impact on the mechanical properties of human bone than previously hypothesized. However, this study emphasizes the need for further research to explore the relationship between AGE accumulation and bone quality. Understanding this relationship is crucial for developing strategies to reduce fracture risk in populations with high AGE levels, such as diabetic and elderly individuals.

摘要

在美国,糖尿病影响着超过3800万人,并且尽管骨矿物质密度(BMD)正常或升高,但糖尿病仍与骨折风险增加有关。这种骨折易感性增加可能与晚期糖基化终产物(AGEs)的积累有关,理论上,AGEs会通过使胶原蛋白网络变硬来损害骨质,从而导致组织变脆。在本研究中,评估了AGE积累对人皮质骨的力学影响。从人股骨获取的骨梁在核糖溶液中孵育以诱导AGE积累,而对照骨梁在对照溶液中孵育。进行动态力学分析(DMA)和三点弯曲试验以评估骨梁的力学性能。进行荧光AGE分析以量化和比较两组之间的AGE水平。研究发现,尽管核糖处理组的标准化AGE含量显著升高,但对照组和核糖处理组之间的力学性能没有显著差异。这些结果表明,AGE积累对人体骨骼力学性能的影响可能比先前假设的要弱。然而,本研究强调需要进一步研究以探索AGE积累与骨质之间的关系。了解这种关系对于制定降低高AGE水平人群(如糖尿病患者和老年人)骨折风险的策略至关重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7896/12002958/77bea89ab2f0/gr1.jpg

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