Ex Vivo Perfusion Culture of Large Blood Vessels in a 3D Printed Bioreactor
July 28th, 2023
This protocol presents the setup and operation of a newly developed, 3D printed bioreactor for the ex vivo culture of blood vessels in perfusion. The system is designed to be easily adopted by other users, practical, affordable, and adaptable to different experimental applications, such as basic biology and pharmacological studies.
We developed a simple cost-effective and adaptable bioreactor for the culture of blood vessels in vitro. The application of physiological flow and pulsatile forces to blood vessels ensures that the cells within the tissue remain viable. The application of bioreactors, such as the one we described here, enable the culture of blood vessels ex vivo and reduces the reliance on animal experiments in research.
The application of hemodynamic forces is crucial to maintain a healthy blood vessel in culture, while profusion bioreactors are a great solution to achieve this dynamic environment. Systems described in the existing literature are often challenging to replicate, expensive, and not easy to adapt. We have developed a new perfusion system titled EasyFlow.
This system is economic to produce, accommodates a different range of tissues, and is simple to modify so researchers can adapt it to their experimental needs. The production is open source, based on a 3D model, and is accessible through the paper. Also, it can be adapted to the needs of the research based on this 3D model.
EasyFlow is currently being employed to test mechanism of vascular repair, such as stem cells or biomaterial-based therapies. We also aim to use this bioreactor to induce the maturation of tissue-engineered blood vessels.
Overview
This protocol presents the setup and operation of a newly developed, 3D printed bioreactor for the ex vivo culture of blood vessels in perfusion. The system is designed to be easily adopted by other users, practical, affordable, and adaptable to different experimental applications.
Key Study Components
Area of Science
- Bioreactor technology
- Vascular biology
- Tissue engineering
Background
- Existing bioreactor systems are often expensive and difficult to replicate.
- Physiological flow and pulsatile forces are crucial for maintaining cell viability in blood vessels.
- Reducing reliance on animal experiments is a key goal in vascular research.
- The development of open-source models can enhance accessibility for researchers.
Purpose of Study
- To present a cost-effective and adaptable bioreactor for blood vessel culture.
- To facilitate the study of vascular repair mechanisms.
- To provide a platform for testing stem cell and biomaterial-based therapies.
Methods Used
- Development of the EasyFlow perfusion system.
- Application of hemodynamic forces to cultured blood vessels.
- Open-source production based on a 3D model.
- Adaptation of the system for various experimental needs.
Main Results
- The EasyFlow system is economical and easy to modify.
- It accommodates a range of tissues for research.
- Initial applications include testing mechanisms of vascular repair.
- The system supports the maturation of tissue-engineered blood vessels.
Conclusions
- The EasyFlow bioreactor offers a practical solution for vascular research.
- It promotes the viability of blood vessels in culture through dynamic conditions.
- This system can significantly reduce the need for animal models in research.
Frequently Asked Questions
Executive Industry Relevance
Standardized ex vivo perfusion culture of large blood vessels addresses a critical gap in translational vascular research by enabling physiologically relevant, reproducible studies outside of animal models. The 3D printed bioreactor platform supports mechanistic de-risking and accelerates therapeutic hypothesis testing for vascular repair and tissue engineering. This capability enhances predictive confidence at the interface of discovery and preclinical development for cardiovascular portfolios.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables interrogation of vascular repair mechanisms under controlled hemodynamic conditions.
- Supports functional validation of stem cell and biomaterial-based therapeutic hypotheses.
- Facilitates biological de-risking by maintaining tissue viability ex vivo.
- Improves predictive confidence for target selection in vascular disease research.
Screening & Assay Development
- Provides a reproducible platform for quantitative assessment of vessel responses to candidate therapies.
- Standardizes dynamic culture conditions for assay comparability and scalability.
- Enables preparation of validated biological systems for downstream screening workflows.
- Supports reliable evaluation of compound or biomaterial effects on vascular tissue.
Translational & Preclinical Research
- Aligns with disease-relevant physiological conditions for translational biomarker studies.
- Bridges discovery-stage findings to preclinical validation by reducing reliance on animal models.
- Supports risk-adjusted advancement decisions for vascular repair and tissue engineering programs.
- Facilitates maturation studies of engineered blood vessels under physiologically relevant flow.
Pipeline & Workflow Integration
This 3D printed bioreactor integrates into the discovery-to-preclinical continuum by enabling ex vivo vessel culture, mechanistic testing, and translational modeling.
- Discovery Biology: Supports hypothesis testing and pathway clarification for vascular repair strategies.
- Screening: Delivers standardized, reproducible assay conditions for quantitative evaluation.
- Analytics: Provides dynamic readouts of vessel viability and response under physiological flow.
- Translational Research: Enables continuity from in vitro discovery to preclinical model validation.
- Enterprise Reuse: Offers an open-source, adaptable platform for broad R&D adoption.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence and reduces mechanistic ambiguity in vascular research.
- Operational Value: Enhances standardization, reproducibility, and scalability of vessel culture workflows.
- Strategic Value: Improves go/no-go decisions and capital efficiency by reducing animal model dependence.
- Portfolio Impact: Enables risk-adjusted prioritization and advancement of vascular repair candidates.
Implementation Considerations
- Requires expertise in vascular biology and tissue engineering for optimal use.
- Needs access to 3D printing and perfusion instrumentation infrastructure.
- Demands cross-team standardization for reproducible dynamic culture conditions.
- Adaptable across a range of vessel types and experimental models.
- Practical limitations include culture duration and tissue compatibility as supported by current data.
