在动态环境中的度传感中进行权衡
Aparajita Kashyap1, Wei Wang2, Brian A Camley3
1Department of Biophysics, Johns Hopkins University, Baltimore, Maryland.
Biophysical journal
|March 27, 2024
概括
细胞通过调整时间平均值来平衡传感噪音和环境变化. 最佳策略取决于传感噪声与环境变化的比率及其相应的时间表.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 化学传感器是一种化学传感器.
背景情况:
- 细胞使用时间平均化来减少化学信号检测期间的测量噪声.
- 当过去的测量不再代表当前条件时,动态环境会引入错误.
研究的目的:
- 研究环境统计如何影响传感噪音与细胞化学传感中的环境变化之间的权衡.
- 为了确定使这种权衡对细胞具有重要意义的环境特性.
主要方法:
- 单个真核细胞感知细菌化学吸引剂 (例如叶酸) 的建模.
- 使用分析计算和随机模拟来分析传感动态.
- 研究细菌运动对化学吸引剂度的影响.
主要成果:
- 确定了广泛的最佳细胞传感策略,从没有时间平均到有限或无限的平均时间.
- 发现传感噪声与环境变化的比率是控制最佳平均值的关键因素.
- 确定传感与环境时间尺度的比率也对传感策略产生了重大影响.
结论:
- 细胞传感策略能够适应环境波动.
- 环境变化,由细菌密度和化学吸引剂扩散等因素驱动,显著影响最佳传感.
- 波动的环境度可以成为噪音的重要来源,即使在看似稳定的环境中.
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