Microfluidic platforms have been instrumental in cultivating 3D cell aggregates known as spheroids, crucial for drug testing and disease mechanism studies in vitro. Yet, traditional microfluidic systems with fixed geometries hinder rapid testing of various channel configurations and spheroid retrieval for downstream analysis. In response, Aljayyousi et al. introduced a versatile microfluidic platform that enables swift adjustments for diverse spheroid growth conditions and easy disassembly for imaging.
This innovative platform seamlessly combines the benefits of open well structures for efficient cell loading and imaging with enclosed microchannels for continuous cell growth media flow. Unlike conventional sealed microfluidic systems, this design employs a double-sided adhesive layer for reversible microwell sealing, facilitating customizable channel configurations through a laser-cutting process. The authors successfully tested mouse embryonic fibroblasts, human-induced pluripotent stem cells, and breast cancer cells on the device, loading them into open wells via pipetting before sealing the microfluidic system for continuous perfusion.
Over a span of up to 14 days, the team cultured the spheroids within the device, leveraging noninvasive optical coherence tomography (OCT) for viability assessments. By utilizing microscopy and OCT imaging, they evaluated spheroid growth, morphology, and viability, with a computational pipeline ensuring precise viability measurements from OCT images, validated against standard assays. Future research will focus on optimizing well geometries to enable automated high-throughput OCT imaging of spheroids.
The development of this modular and reconfigurable microfluidic device for spheroid culturing under continuous perfusion represents a significant advancement in the field, offering researchers unprecedented flexibility in testing various spheroid growth conditions and streamlining downstream analysis processes. This novel approach not only enhances the efficiency and accuracy of spheroid studies but also paves the way for more sophisticated high-throughput imaging techniques and further advancements in drug testing and disease modeling.
Key Takeaways:
– The reconfigurable microfluidic platform developed by Aljayyousi et al. allows for rapid adjustments in spheroid growth conditions and facilitates easy spheroid retrieval for downstream analysis.
– By combining open well structures with enclosed microchannels, this innovative device optimizes cell loading, imaging, and continuous media flow for enhanced spheroid culturing.
– The platform has been successfully tested with various cell lines, demonstrating its versatility and effectiveness in culturing spheroids over extended periods while enabling noninvasive viability assessments.
– Future research aims to optimize well geometries to enable automated high-throughput imaging of spheroids, further enhancing the platform’s capabilities and applications in drug testing and disease modeling.
Tags: downstream
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