在动态驱动的活性纤维中出现的可编程行为和混乱
Deepak Krishnamurthy1, Manu Prakash2
1Department of Bioengineering, University of California, Berkeley, CA 94720.
科学家们模拟了Lacrymaria olor细胞中的活性丝,以了解编程力量如何产生细胞部运动. 这项研究揭示了简单的规则如何产生复杂的行为,如搜索和寻找.
科学领域:
- 生物物理学的生物物理.
- 细胞动态 细胞动态
- 活动物质物理学 活动物质物理学
背景情况:
- 了解细胞下部件如何产生细胞行为是生物学和物理学的重大挑战.
- 状的Lacrymaria olor表现出复杂的狩猎行为,使用苗条的状子.
- 细胞为特定的行为编程活性丝结构的机制尚不清楚.
研究的目的:
- 开发一个主动丝模型,将编程强迫与丝形状动力学联系起来.
- 为了研究时间变化的活动模式和追随力如何影响细胞部行为.
- 探索简单程序产生复杂行为的潜力,如定位和搜索.
主要方法:
- 开发一种包含时间变化的活动和追随力约束的活性灯光模型.
- 在确定性,时间变化的追随力下分析导线动态.
- 识别非线性代地图,以预测长期的导线行为.
- 在Lacrymaria olor生物程序的统计测量用于实验性比较.
主要成果:
- 在时间变化的追随力下,活跃的细丝表现出复杂的周期性和非周期性动态.
- 在生物学上可访问的参数空间中观察到过渡到混乱,解释了无周期性.
- 确定了一个简单的非线性代地图,预测长期的线程行为.
- 模型的预测与L. olor.生物程序的统计性质进行了比较.
结论:
- 活体导线模型可以阐明程序化力量和新兴细胞行为之间的关系.
- 随时变化的追随力可以产生丰富而复杂的动态,包括混乱的政权.
- 简单的预测地图表明,可以为特定的细胞功能设计人工程序.
- 该研究为比较理论模型与细胞行为的实验观测提供了一个框架.
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