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Cell Migration01:09

Cell Migration

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Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
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Propagation of Uncertainty from Random Error00:59

Propagation of Uncertainty from Random Error

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An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
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相关实验视频

Updated: Apr 24, 2026

Modeling Astrocytoma Pathogenesis In Vitro and In Vivo Using Cortical Astrocytes or Neural Stem Cells from Conditional, Genetically Engineered Mice
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Modeling Astrocytoma Pathogenesis In Vitro and In Vivo Using Cortical Astrocytes or Neural Stem Cells from Conditional, Genetically Engineered Mice

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一种近似的贝叶斯计算方法,用于胚胎天体细胞迁移模型的减少.

Tracy L Stepien1

  • 1Department of Mathematics, University of Florida, Gainesville, FL, USA. tstepien@ufl.edu.

Bulletin of mathematical biology
|September 13, 2024
PubMed
概括

星球细胞构成了视网膜血管发育的关键网格. 采用近似贝叶斯计算 (ABC) 的模型减少证实,状体的氧气供应在天体细胞分化和增殖中起的作用微不足道.

科学领域:

  • 眼科医生 眼科 眼科
  • 发展生物学 发展生物学
  • 计算生物学 计算生物学

背景情况:

  • 天星细胞 (质细胞) 通过胚胎视网膜迁移,形成对视网膜血管系统发育至关重要的网格.
  • 这一过程涉及天体细胞前体细胞 (APC) 分化为不成熟的围产天体细胞 (IPA) 和增殖.
  • 星球细胞迁移是辐射对称的,血管网络为内视网膜提供营养.

研究的目的:

  • 完善一个连续模型的天体细胞迁移,增殖和分化在视网膜发育期间.
  • 通过使用近似贝叶斯计算 (ABC) 进行模型减少来识别关键模型组件.
  • 验证氧气供应和亡在天体细胞发育中的作用.

主要方法:

  • 扩展了先前开发的连续模型,包括应力驱动的迁移和氧气/生长因子的影响.
  • 使用近似贝叶斯计算 (ABC) 通过比较数值模拟与实验数据来进行模型缩小.
  • 分析状动脉氧气供应,状动脉氧气供应和APC亡对天体细胞行为的影响.

主要成果:

  • 模型缩小确定了可以在不显著影响模拟准确性的情况下删除的组件.
  • 证实胆管氧气供应对APC分化成IPA和IPA增殖的影响微不足道.
  • 证明状动脉的氧气供应和APC亡在天体细胞的扩散和分化中起的作用是微不足道的.
关键词:
细胞迁移 细胞迁移连续模型的连续模型.胚胎发育的时间自由边界问题 自由边界问题数学建模的数学建模视网膜 (retina) 是一个视网膜.

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结论:

  • 这种精细的模型为控制视网膜血管发育的机制提供了洞察力.
  • 胆管氧气供应不是胚胎视网膜中星球细胞分化或增殖的主要驱动因素.
  • 在这个阶段,状动脉氧和APC亡并不是天体细胞迁移和分化的关键因素.