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Window on a Microworld: Simple Microfluidic Systems for Studying Microbial Transport in Porous Media

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Published on: May 3, 2010

Open-space microfluidics as a tool to study signaling dynamics.

Maude Proulx¹, Pierre Clapperton-Richard¹, Laurent Potvin-Trottier²

¹Institute of Biomedical Engineering, Polytechnique Montréal, Montréal, QC, Canada. Thomas.Gervais@polymtl.ca.

|September 25, 2025

Summary

This summary is machine-generated.

This study introduces a microfluidic display for precise cell signaling control. The device enables rapid, multiplexed experiments, revealing how Notch pathway dynamics influence gene expression, crucial for targeted therapies.

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Area of Science:

Cell Biology
Systems Biology
Biotechnology

Background:

Cell signaling dynamics regulate transcriptional targets and cellular responses, impacting drug development for signaling pathways.
Studying signaling dynamics necessitates multiplexed, time-sensitive experimental approaches.

Purpose of the Study:

To develop and utilize a novel microfluidic display for high-temporal-resolution stimulation of cell signaling pathways.
To investigate the impact of varying Notch pathway activation patterns on downstream gene expression (Hes1 and Hey1).

Main Methods:

Design of an open-space microfluidic device enabling rapid reagent switching (<7 seconds) and 6 independent confinement zones.
Application of the microfluidic display to study the Notch pathway in engineered C2C12 cells using time-varying doses of DAPT.
Multiplexed stimulation experiments varying signal pulse duration and duty cycle while keeping dose constant.

Main Results:

Replication of previous findings: Hes1 is upregulated by short Notch activation pulses, while Hey1 requires sustained activation.
Confirmation of a regime switch in gene dominance from Hes1 to Hey1 between 2 and 3 hours of activation.
Demonstration that Hes1 upregulation is induced by multiple short pulses, whereas Hey1 activation depends on duty cycle length.

Conclusions:

Microfluidic displays are valuable tools for systems biology research, offering multiplexed, high-temporal-resolution stimulation capabilities.
Precise control over signaling dynamics using microfluidic platforms can elucidate complex pathway behaviors.
This technology facilitates the study of temporal signaling patterns relevant to understanding cellular responses and developing targeted therapeutics.