动态双轴负荷的血管光滑肌肉细胞播种组织等价物
Daniel Paukner1, Isabella R Jennings2, Christian J Cyron3
1Institute for Continuum and Material Mechanics, Hamburg University of Technology, Hamburg, Germany; Institute of Material Systems Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany; Department of Biomedical Engineering, Yale University, New Haven, CT, USA.
概括
原凝中的血管光滑肌细胞适应双轴负荷,保持稳定状态力和刚性. 这表明在这些细胞矩阵相互作用中存在负载介导的恒温反应.
科学领域:
- 生物材料科学 生物材料科学
- 细胞生物学 细胞生物学
- 生物力学 生物力学
背景情况:
- 细胞及其细胞外基质 (ECM) 具有相互关系,细胞影响ECM,ECM影响细胞表型.
- 原体凝是细胞矩阵相互作用的模型系统,但在动态负荷下细胞力量的定量数据有限.
- 大多数研究使用单轴负荷,与动脉等软组织的体内条件不同.
研究的目的:
- 为了研究在动态双轴负荷下,原体凝中的细胞力量.
- 探索血管光滑肌细胞如何应对不同的机械约束和负载幅度.
- 在多轴应力下量化细胞矩阵力关系.
主要方法:
- 利用定制的双轴生物反应器,将循环负荷应用于具有主要大动脉光滑肌细胞的原体凝.
- 在十字形样本上测试了不同的负载幅度和机械边界条件.
- 通过间歇式等轴向力延伸测试评估了刚性-力关系.
主要成果:
- 在所有测试的负载幅度和边界条件中观察到一致的平均稳定状态双轴力.
- 在细胞适应循环负荷后,刚性-力关系表现出了显著的相似性.
- 研究结果表明,血管光滑肌细胞中的负载介导的恒常反应.
结论:
- 血管光滑肌细胞对机械负荷表现出平静反应,保持稳定的力和机械性能.
- 该研究提供了对双轴应力下的细胞矩阵动态的定量见解,与软组织力学相关.
- 这项研究弥合了在工程组织模型中对多轴负荷的细胞反应的理解上的差距.
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