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Development of Microfluidic Dilution Network-Based System for Lab-on-a-Chip Microalgal Bioassays
Guoxia Zheng1,2, Ling Lu3,2, Yusuo Yang1,2
1Chemical and Environmental Engineering Institute , Dalian University , 11662 Dalian , China.
Analytical Chemistry
|October 23, 2018
Summary
A novel microfluidic device simplifies microalgal bioassays, offering a cost-effective, rapid, and space-saving alternative for routine aquatic toxicity testing and environmental risk assessment.
Area of Science:
- Environmental Science
- Biotechnology
- Microfluidics
Background:
- Microalgal bioassays are crucial for aquatic toxicity testing in regulatory frameworks.
- Conventional methods are lab-intensive, time-consuming, and space-limited, hindering routine use.
- Microfluidics offers a promising, user-friendly alternative for efficient bioassays.
Purpose of the Study:
- To develop a microfluidic platform for routine microalgal bioassays.
- To integrate chemical dilution, microalgal culture, and online screening into a single device.
- To enable precise gradient generation for toxicity screening.
Main Methods:
- A microfluidic chip was designed with upstream dilution and downstream culturing modules.
- Electronic design automation (EDA) simulations were used to optimize the design.
- The device integrates liquid dilution, diffusion, microalgal culture, cell stimulation, and online screening.
Main Results:
- Microalgae were successfully cultured and stressed on-chip using the developed device.
- The assay enabled multibiological trait assessments, including cell division rate, autofluorescence, esterase activity, and motility.
- The microfluidic system demonstrated efficient and precise gradient generation for toxicity testing.
Conclusions:
- The microfluidic platform offers a significant advancement for routine microalgal bioassays.
- This technology provides a high-throughput solution for cell-based environmental risk assessment.
- The developed lab-on-a-chip system is promising for quantitative environmental health monitoring.
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