开放空间微流体作为研究信号动态的工具
Maude Proulx1, Pierre Clapperton-Richard1, Laurent Potvin-Trottier2
1Institute of Biomedical Engineering, Polytechnique Montréal, Montréal, QC, Canada. Thomas.Gervais@polymtl.ca.
Lab on a chip
|September 25, 2025
概括
这项研究引入了微流体显示器,用于精确的细胞信号控制. 该设备能够进行快速的多重化实验,揭示了Notch路径动态如何影响基因表达,这对于向疗法至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 系统生物学 系统生物学
- 生物技术是生物技术.
背景情况:
- 细胞信号传递动态调节转录目标和细胞反应,影响信号通路的药物开发.
- 研究信号动态需要多重,时间敏感的实验方法.
研究的目的:
- 开发和利用一种新的微流体显示器,用于高时间分辨率刺激细胞信号通路.
- 研究不同Notch通路激活模式对下游基因表达 (Hes1和Hey1) 的影响.
主要方法:
- 设计一个开放空间的微流体装置,使试剂快速切换 (<7秒) 和6个独立的封闭区.
- 微流体显示器的应用,用于研究工程C2C12细胞中的Notch路径,使用随时间变化的DAPT剂量.
- 多复合刺激实验在保持剂量不变的同时改变信号脉冲持续时间和工作周期.
主要成果:
- 复制之前的发现:Hes1通过短时间的Notch激活脉冲进行上调,而Hey1需要持续的激活.
- 在激活后2至3小时之间,确认了基因主导地位从Hes1到Hey1的调节转换.
- 证明Hes1上调是由多个短脉冲诱导的,而Hey1激活取决于工作周期长度.
结论:
- 微流体显示器是系统生物学研究的宝贵工具,提供多重,高时间分辨率的刺激功能.
- 使用微流体平台对信号动态的精确控制可以阐明复杂的路径行为.
- 这项技术有助于研究与理解细胞反应和开发向治疗相关的时间信号模式.
相关概念视频
01:07Laminar and Turbulent Flow
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the streamlines...
01:11Pressure Variation in a Fluid at Rest
In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in pressure...
When measuring pressure at two different levels within the fluid, the difference in pressure...
01:16Measurement of Fluid Pressure
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
01:23Steady, Laminar Flow in Circular Tubes
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...