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原网络的机械模型,以了解老化皮肤失效性质的变化

Nathan J Witt¹, Alan E Woessner², Jacob Herrmann³

¹Roy J. Carver Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, IA 52240.

Journal of biomechanical engineering

|January 6, 2024

概括

老化的皮肤老化.

科学领域:

生物医学工程生物医学工程
皮肤病学皮肤病学
材料科学材料科学材料科学

背景情况:

皮肤衰老会改变皮肤的组成和结构,导致机械变化.
以前关于老化皮肤硬性的研究显示了相互矛盾的结果.
原纤维中的非酶交叉链是影响这些变化的潜在因素.

研究的目的:

为了研究非酶性交叉连接改变对皮肤微观结构力学的影响.
模拟原硬化和碎片化对皮肤特性的影响.

主要方法:

利用离散的光纤网络来表示皮肤微观结构.
模拟了原纤维性质的变化,特别是非酶性交联.
分析了网络层面的刚性,故障应力和拉伸比率.

主要成果:

硬化原纤维的塑料区域对整体网络硬度和故障压力的影响最小.
模拟碎片化 (连接性损失) 显著降低了网络性和故障压力.
碎片化还导致故障时延伸比率增加.

结论:

原纤维的碎片化,而不仅仅是硬化,在与年龄相关的皮肤机械变化中起着至关重要的作用.
了解这些微观结构变化是解释皮肤衰老机制变化的关键.

关键词:

衰老的衰老衰老的衰老生物力学生物力学原蛋白是一种原蛋白.皮肤的皮肤 (dermis) 是一个纤维纤维网络是指光纤网络.多光子显微镜的多光子显微镜非亲属关系的非亲属关系.组织损伤组织损伤

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