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Advances in Concentration Gradient Generation Approaches in a Microfluidic Device for Toxicity Analysis.
Nicole M E Valle1,2, Mariana P Nucci1,3, Arielly H Alves1
1Hospital Israelita Albert Einstein, São Paulo 05652-000, Brazil.
Cells
|October 14, 2022
Summary
Microfluidic concentration gradient generators (CGGs) offer an effective method for toxicity testing across various biological models. These devices, often made with soft lithography, show promise for improved toxicological evaluation in medical and environmental applications.
Area of Science:
- Biotechnology
- Toxicology
- Microfluidics
Background:
- Microfluidic concentration gradient generators (CGGs) are increasingly utilized for precise toxicological evaluations.
- Traditional toxicity testing methods face limitations in efficiency and scalability.
Purpose of the Study:
- To systematically review the development and functionality of microfluidic CGGs for toxicological assessment.
- To analyze fabrication methods, CGG designs, biological models, and evaluation techniques.
Main Methods:
- Systematic literature search using keywords: concentration gradient generator, toxicity, microfluidic device.
- Inclusion criteria: 33 articles analyzed for fabrication, CGG characteristics, biological models, and results.
- Focus on soft lithography (PDMS, SU-8), Christmas tree design, and convective generation.
Main Results:
- Soft lithography with PDMS and SU-8 molds dominated fabrication.
- Christmas tree design and convective generation were most common.
- Diverse biological models used: bacteria, nematodes, microalgae, cell lines, and Zebrafish embryos.
- Imaging and microscopy were primary evaluation techniques.
Conclusions:
- Microfluidic CGGs demonstrate advantages over other techniques for toxicity testing.
- Ongoing advancements focus on new technologies and designs to enhance effectiveness and overcome microfluidic challenges.
- CGGs show high applicability for diverse toxicological evaluations in medical and environmental fields.
