A Millifluidic Chamber for Controlled Shear Stress Testing: Application to Microbial Cultures

Area of Science:

• Biotechnology
• Biomedical Engineering
• Cell Biology

Background:

• In vitro platforms like bioreactors and microfluidic devices are crucial for tissue engineering and studying cell-microorganism interactions.
• These systems involve medium recirculation, leading to shear stress that can influence cell fate or inhibit model maturation.
• Quantifying shear stress effects is vital for establishing optimal in vitro culture conditions.

Purpose of the Study:

• To develop a millifluidic device for generating controlled shear stress profiles.
• To quantitatively investigate the influence of shear stress on in vitro tissue and bacterial models.
• To overcome limitations of existing devices for shear stress analysis.

Main Methods:

• Development of a novel millifluidic device capable of precise shear stress control.
• Establishment of a systematic methodology to assess cellular responses to shear forces.
• Application of the methodology to study microbial biofilms as a proof of concept.

Main Results:

• The millifluidic device successfully generated controlled shear stress profiles.
• The study provided a systematic approach to evaluate shear stress effects on adherent cellular structures.
• Microbial biofilms were used to demonstrate the device's efficacy in assessing shear force impacts.

Conclusions:

• The developed millifluidic device offers a robust platform for studying shear stress in in vitro models.
• This approach enables quantitative assessment of shear stress effects on cells and microorganisms.
• The findings support the use of this tool for optimizing culture conditions in tissue and microbial modeling.