Push or Pull? Cell Proliferation and Migration During Wound Healing

Adriana Zanca, J. Flegg, J. Osborne
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引用次数: 1

Abstract

Wound healing of the skin is a complex process that is still not well-understood. Wound management is expensive for both individuals and the health system overall, and can reduce quality of life for patients. Given these significant socio-economic impacts, wound healing has long been a focus of scientific research. Recent in vivo mouse studies have identified two key regions in wounded skin tissue: A non-proliferative leading edge that actively migrates into wounded space, and a proliferative hub in which cells have enhanced mitotic properties. This work uses mathematical and computational modelling to investigate the effect of changing the mechanical characteristics of cells in these two key regions. In this paper we explore what characteristics are sufficient for wound healing, particularly focusing on cell proliferation, since wounds are not able to repair successfully without sufficient levels of cell division. By considering contact inhibited proliferation, where small cells are unable to divide, we find that a quiescent region develops if the proliferative hub is able to grow over time, essentially limiting the number of cells that are able to divide. In contrast, if the size of the proliferative hub is kept below some threshold, then contact inhibition has a less significant role in wound repair. This work builds upon existing cell-based computational studies of wound healing and could be modified to investigate different stages of wound healing, impaired healing and wound treatments.
推还是拉?伤口愈合过程中的细胞增殖和迁移
皮肤伤口愈合是一个复杂的过程,至今仍未得到很好的理解。伤口处理对个人和整个卫生系统来说都是昂贵的,并可能降低患者的生活质量。鉴于这些重大的社会经济影响,伤口愈合长期以来一直是科学研究的焦点。最近的小鼠体内研究已经确定了损伤皮肤组织中的两个关键区域:主动迁移到损伤空间的非增殖性前沿和细胞增强有丝分裂特性的增殖性中心。这项工作使用数学和计算模型来研究改变这两个关键区域细胞的机械特性的影响。在本文中,我们探讨了哪些特征足以促进伤口愈合,特别是关注细胞增殖,因为如果没有足够的细胞分裂水平,伤口就无法成功修复。通过考虑接触抑制增殖,小细胞无法分裂,我们发现如果增殖中心能够随着时间的推移而生长,就会形成一个静止区域,这基本上限制了能够分裂的细胞的数量。相反,如果增殖中枢的大小保持在某个阈值以下,那么接触抑制在伤口修复中的作用就不那么显著。这项工作建立在现有的基于细胞的伤口愈合计算研究的基础上,可以修改以研究伤口愈合、受损愈合和伤口治疗的不同阶段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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