The Multi-organ Chip - A Microfluidic Platform for Long-term Multi-tissue Coculture
April 28th, 2015
32.2K views
Here, we present a protocol to coculture primary cells, tissue models and punch biopsies in a microfluidic multi-organ chip for up to 28 days. Human dermal microvascular endothelial cells, liver aggregates and skin biopsies were successfully combined in a common media circulation.
Overview
This article presents a protocol for coculturing primary cells, tissue models, and punch biopsies using a microfluidic multi-organ chip for up to 28 days. The successful combination of human dermal microvascular endothelial cells, liver aggregates, and skin biopsies in a common media circulation is detailed.
Key Study Components
Area of Science
- Neuroscience
- Cell Biology
- Microfluidics
Background
- Microfluidic systems allow for the integration of multiple organ systems.
- Coculture techniques can enhance the study of cellular interactions.
- Maintaining cell viability and functionality over extended periods is crucial.
- This study explores the potential of a multi-organ chip for long-term culture.
Purpose of Study
- To develop a reliable protocol for coculturing different cell types.
- To investigate the interactions between endothelial cells and tissue models.
- To assess the viability of cells in a microfluidic environment over time.
Methods Used
- Microfluidic chip design and fabrication.
- Isolation of primary human dermal microvascular endothelial cells.
- Preparation of liver aggregates and skin biopsies.
- Establishment of common media circulation for coculture.
Main Results
- Successful coculture of endothelial cells, liver aggregates, and skin biopsies.
- Cells maintained viability for up to 28 days.
- Observations of cellular interactions in the microfluidic environment.
- Potential applications in drug testing and disease modeling.
Conclusions
- The microfluidic multi-organ chip is effective for long-term coculture.
- This approach can facilitate the study of complex cellular interactions.
- Future research may expand on the applications of this technology.
Frequently Asked Questions
What is a microfluidic multi-organ chip?
A microfluidic multi-organ chip is a device that allows for the simultaneous culture of multiple cell types in a controlled environment.
How long can cells be cultured in this system?
Cells can be cultured for up to 28 days in the microfluidic multi-organ chip.
What types of cells were used in this study?
The study used human dermal microvascular endothelial cells, liver aggregates, and skin biopsies.
What are the potential applications of this research?
Potential applications include drug testing and modeling diseases in a controlled environment.
What are the benefits of using coculture techniques?
Coculture techniques can enhance the understanding of cellular interactions and improve the relevance of in vitro models.
How does the media circulation work in the chip?
The media circulation allows for the exchange of nutrients and waste products, supporting cell viability and function.
Executive Industry Relevance
Long-term multi-tissue coculture in a microfluidic platform addresses the critical need for predictive preclinical models that better capture organ-organ interactions and chronic substance exposure effects. By enabling stable, near-physiologic fluid flow and repeated dosing over 28 days, the system supports mechanistic de-risking in early discovery and improves translational confidence for hepatotoxicity and dermal safety assessment. This positions the technology as a reusable capability for lead identification and predictive modeling in pharmaceutical R&D pipelines.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of cross-tissue signaling pathways and mechanistic de-risking of compound-induced organ interactions.
- Operational Value: Supports functional validation of targets in a multicellular microenvironment that reflects physiological complexity.
Screening & Assay Development
- Scientific Value: Provides a standardized, reproducible platform for quantitative assessment of substance effects across interconnected tissue models.
- Operational Value: Enables scalable, long-term coculture with media perfusion for repeated compound exposure and readout collection.
Translational & Preclinical Research
- Scientific Value: Enhances disease relevance by modeling human liver-skin-vascular interactions in a controlled, perfused system.
- Operational Value: Supports continuity from discovery through preclinical evaluation by maintaining tissue functionality over extended culture periods.
Pipeline & Workflow Integration
The microfluidic multi-organ chip integrates into early discovery workflows by enabling hypothesis testing of organ-specific toxicities and pathway modulation in a human-relevant coculture system.
- Discovery Biology: Facilitates hypothesis testing of inter-organ communication and compound effects on tissue-specific functions.
- Screening: Delivers assay readiness through stable, perfused coculture conditions suitable for compound library screening.
- Analytics: Generates quantitative, time-resolved readouts from multiple tissue compartments to support comparative condition analysis.
- Translational Research: Promotes preclinical continuity by preserving organotypic architecture and function over 28-day culture periods.
- Enterprise Reuse: Offers a reusable perfusion platform adaptable to multiple tissue combinations and compound testing campaigns.
Operational & Enterprise Impact
- Scientific Value: Improves predictive confidence by reducing mechanistic ambiguity in organ-organ crosstalk and substance response.
- Operational Value: Ensures standardization, reproducibility, and scalability of long-term multicellular coculture under controlled flow.
- Strategic Value: Informs better go/no-go decisions by identifying organ-specific liabilities earlier, reducing late-stage attrition risk.
- Portfolio Impact: Enables risk-adjusted prioritization of candidates based on multi-tissue tolerance and functional readouts.
Implementation Considerations
- Requires expertise in microfluidic system operation, primary cell handling, and tissue model preparation.
- Depends on perfusion-compatible instrumentation, sterile fluid handling, and real-time monitoring infrastructure.
- Necessitates cross-team standardization of media formulations, flow rates, and sampling protocols for reproducible results.
- Involves adaptation considerations when integrating diverse primary tissues or biopsies with varying culture requirements.
- Limited by the need for specialized fabrication and validation of chip designs to maintain physiologic shear stress and volume ratios.
Biopharma FAQs
Why is long-term culture important for target validation studies?
Long-term culture enables repeated substance exposure and observation of delayed or cumulative toxic effects, which are critical for validating targets in chronic disease models. The system supports coculture viability for up to 28 days, allowing assessment of sustained target engagement and organ-specific responses over time. This duration improves predictive confidence by mimicking human dosing regimens and revealing late-onset organ interactions not captured in short-term assays.
How does independent variable isolation improve discovery pipeline efficiency?
The microfluidic design allows precise control of fluid flow, media composition, and tissue positioning, enabling isolation of variables such as shear stress or compound concentration. This control reduces confounding factors in coculture experiments, improving data reliability for target validation and lead optimization. By standardizing these parameters, teams can compare conditions across experiments with greater reproducibility and fewer false positives.
What quantitative measurements does the system enable for dependent variables?
The platform supports quantitative readouts such as metabolite secretion, enzyme activity, barrier integrity, and viability markers from each tissue compartment. These measurements allow dose-response modeling and kinetic analysis of substance effects across interconnected tissues. Time-resolved sampling via the perfusion system enables longitudinal tracking of functional changes, supporting mechanistic insight and safety margin estimation.
Why are replication requirements essential for cross-functional collaboration?
Replication ensures that observed tissue responses are consistent and not due to stochastic variability in cell seeding or chip preparation. Standardized protocols for liver aggregate formation, skin biopsy placement, and endothelial seeding allow toxicology, DMPK, and biology teams to generate comparable data. This consistency supports joint interpretation of results and alignment on go/no-go criteria in multidisciplinary project teams.
What statistical analysis capabilities are needed before implementing this system?
Implementation requires the ability to perform longitudinal data analysis, including repeated measures ANOVA or mixed-effects models, to account for temporal correlations in perfusion-based readouts. Teams must also apply correction for multiple comparisons when assessing multiple tissue endpoints or time points. These capabilities ensure that observed differences are statistically robust and not driven by noise, supporting confident decision-making in preclinical evaluation.
