KEYWORDS: Liver, Microfluidics, Tissues, In vitro testing, In vivo imaging, Toxicology, Tumor growth modeling, Mode conditioning cables, System integration, Drug discovery
A new cell culture analog has been developed. It is based on the standard multiwell cell culture plate format but it provides perfused three-dimensional cell culture capability. The new capability is achieved by integrating microfluidic valves and pumps into the plate. The system provides a means to conduct high throughput assays for target validation and predictive toxicology in the drug discovery and development process. It can be also used for evaluation of long-term
exposure to drugs or environmental agents or as a model to study viral hepatitis, cancer metastasis, and other diseases and pathological conditions.
Biological applications of MEMS technology (bioMEMS) is of increasing interest in the development of miniature and portable instrumentation for cell-based microassays and sensor applications. A major bioMEMS challenge is the physical incorporation of living cells into sensors and diagnostic devices and creation of the environmental conditions conducive for organization of differentiated cells into tissue-like structures. Our work towards these goals is illustrated by a tissue-based bioassay system we are developing based on a miniature cross-flow bioreactor constructed from of an array of cell-filled microchannels integrated into an environmentally-controlled polymer microfluidics manifold. We describe our microchannel array and manifold manufacturing methods and report on the in vitro culture of cell populations in the bioreactor.
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