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首页> 外文期刊>Acta biomaterialia >Agent-based modeling of porous scaffold degradation and vascularization: Optimal scaffold design based on architecture and degradation dynamics
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Agent-based modeling of porous scaffold degradation and vascularization: Optimal scaffold design based on architecture and degradation dynamics

机译:基于代理的多孔支架降解和血管生成建模:基于架构和降解动力学的最佳支架设计

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摘要

A multi-layer agent-based model (ABM) of biomaterial scaffold vascularization is extended to consider the effects of scaffold degradation kinetics on blood vessel formation. A degradation model describing the bulk disintegration of porous hydrogels is incorporated into the ABM. The combined degradation-angiogenesis model is used to investigate growing blood vessel networks in the presence of a degradable scaffold structure. Simulation results indicate that higher porosity, larger mean pore size, and rapid degradation allow faster vascularization when not considering the structural support of the scaffold. However, premature loss of structural support results in failure for the material. A strategy using multi-layer scaffold with different degradation rates in each layer was investigated as a way to address this issue. Vascularization was improved with the multi-layered scaffold model compared to the single-layer model. The ABM developed provides insight into the characteristics that influence the selection of optimal geometric parameters and degradation behavior of scaffolds, and enables easy refinement of the model as new knowledge about the underlying biological phenomena becomes available.
机译:扩展了基于生物材料支架血管化的多层基于试剂的模型(ABM),以考虑支架降解动力学对血管形成的影响。将描述多孔水凝胶的整体崩解的降解模型并入ABM。组合的降解-血管生成模型用于研究存在可降解支架结构时不断增长的血管网络。仿真结果表明,当不考虑支架的结构支撑时,较高的孔隙率,较大的平均孔径和快速降解可加快血管生成。但是,过早失去结构支撑会导致材料损坏。作为解决此问题的一种方法,研究了在每一层中使用具有不同降解率的多层支架的策略。与单层模型相比,多层支架模型改善了血管形成。所开发的ABM提供了对影响最佳几何参数选择和脚手架降解行为的特征的洞察力,并且随着有关基础生物学现象的新知识的获得,可以轻松地完善模型。

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