CHEMOTAXIS IN DICTYOSTELIUM DISCOIDEUM: AN INTEGRATIVE APPROACH

描述（由申请人提供）：趋化性是细胞在化学梯度中的定向运动。它在许多重要的生物学过程中起着重要作用，包括胚胎学;伤口愈合和癌症转移。本项目的主要目的是利用Dictyosteelium discoideum模型系统扩展我们对趋化性的定量研究。具体来说，我们将通过将其分为具有不同时间尺度的三个项目来研究趋化过程： 1)方向感测：细胞暴露于外部环境后的第一个响应（0-10 s） 化学引诱剂梯度， 2)极性：随后（10-45秒）细胞骨架重组，导致不对称（极化）细胞， 3)运动性：细胞运动的最终（> 45秒）过程。 对于所有项目，我们将使用定量实验的组合，通过使用微流体设备和建模方法的辅助，进一步深入了解真核细胞趋化性的机制。

DESCRIPTION (provided by applicant): Chemotaxis is the directed movement of cells in a chemical gradient. It plays a major role in a large number of important biological processes, including embryology; wound healing, and cancer metastasis. The main aim of this Program Project is to extend our quantitative studies of chemotaxis using the model system Dictyostelium discoideum. Specifically, we will investigate the chemotactic process by dividing it into three projects with distinct timescales: 1) Directional sensing: the first response (0-10 s) of a cell following the exposure to an external Chemoattractant gradient, 2) Polarity: the subsequent (10-45 s) reorganization of the cytoskeleton, leading to an asymmetric (polarized) cell, and 3) Motility: the eventual (> 45 s) process of cell movement. For all projects, we will use a combination of quantitative experiments, aided by the use of microfluidic devices, and modeling approaches to further our insights into the mechanisms of eukaryotic chemotaxis.