Cultivation of Mammalian Cells Using a Single-use Pneumatic Bioreactor System
October 10th, 2014
26.5K views
Using a pneumatic bioreactor, we demonstrate the assembly, operation, and performance of this single-use bioreactor system for the growth of mammalian cells.
Overview
This article presents a protocol for using a pneumatic bioreactor to grow mammalian cells. The procedure includes calibration, assembly, and operation of the bioreactor system.
Key Study Components
Area of Science
- Biotechnology
- Cell Culture
- Bioreactor Technology
Background
- The need for large-scale mammalian cell growth.
- Importance of minimizing microbial contamination.
- Comparison with traditional bioreactor systems.
- Use of single-use bioreactor systems.
Purpose of Study
- To demonstrate the assembly and operation of a pneumatic bioreactor.
- To optimize the growth conditions for mammalian cells.
- To provide a reliable method for cell culture.
Methods Used
- Calibration of pH and dissolved oxygen sensors.
- Assembly of bioreactor components.
- Aseptic connection of media and micro carriers.
- Monitoring and control of bioreactor parameters.
Main Results
- Successful calibration of sensors and setup of the bioreactor.
- Efficient growth of mammalian cells in a controlled environment.
- Minimized risk of contamination during the process.
Conclusions
- The pneumatic bioreactor is effective for mammalian cell culture.
- Single-use systems offer advantages over traditional methods.
- Protocol provides a reliable framework for researchers.
Frequently Asked Questions
What is a pneumatic bioreactor?
A pneumatic bioreactor is a system that uses air pressure to control the growth environment for cells.
How do you calibrate the pH sensor?
The pH sensor is calibrated using standard buffer solutions at pH 4 and pH 7.
What are the advantages of using a single-use bioreactor?
Single-use bioreactors reduce the risk of contamination and simplify the cleaning process.
What types of cells can be grown in this bioreactor?
This bioreactor is designed for the growth of mammalian cells.
How is the oxygen saturation maintained?
Oxygen saturation is controlled through the bioreactor's gas supply and monitoring systems.
What is the role of micro carriers in this process?
Micro carriers provide a surface for cells to attach and grow in suspension culture.
Executive Industry Relevance
Establishing robust, scalable mammalian cell culture systems is critical for therapeutic protein, monoclonal antibody, and vaccine development. The pneumatic single-use bioreactor addresses key bioprocessing challenges by minimizing hydrodynamic shear, preventing nutrient gradients, and enabling real-time parameter monitoring. This supports early-stage process development and de-risks scale-up for biologics manufacturing.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables controlled expansion of mammalian cells for target engagement and functional assays.
- Operational Value: Reduces contamination risk during early-stage cell amplification for screening campaigns.
Screening & Assay Development
- Scientific Value: Provides reproducible, high-density cell cultures for consistent assay readouts in lead identification.
- Operational Value: Standardizes cell preparation workflows, improving throughput and data reliability across screening platforms.
Translational & Preclinical Research
- Scientific Value: Supports generation of therapeutic proteins and viral vectors under controlled, scalable conditions.
- Operational Value: Facilitates seamless transition from discovery to preclinical production with minimized process variability.
Pipeline & Workflow Integration
The system integrates into mammalian cell culture workflows from early amplification through protein production, supporting both adherent and suspension cell expansion for downstream purification.
- Discovery Biology: Enables reliable cell expansion for target validation and mechanistic studies.
- Screening: Delivers standardized, contamination-reduced cell batches for assay reproducibility.
- Analytics: Supports real-time monitoring of pH, dissolved oxygen, and temperature for process consistency.
- Translational Research: Bridges lab-scale culture to preclinical material production for vaccines and biologics.
- Enterprise Reuse: Single-use design allows rapid redeployment across projects, reducing turnaround time between campaigns.
Operational & Enterprise Impact
- Scientific Value: Predictive cell growth performance and reduced mechanistic ambiguity in culture conditions.
- Operational Value: Elimination of cleaning validation and sterilization steps via single-use design.
- Strategic Value: Lower capital burden and faster initiation of cell culture runs.
- Portfolio Impact: Enables risk-adjusted decisions on cell line progression based on scalable, reproducible growth data.
Implementation Considerations
- Requires expertise in aseptic technique and bioreactor operation.
- Dependent on calibrated pH, dissolved oxygen, and temperature sensors.
- Necessitates sterile tubing, filters, and media handling infrastructure.
- Adaptation needed for different microcarrier types and cell lines.
- Limited to batch operations; not suited for continuous perfusion without modification.
Biopharma FAQs
Why does minimizing hydrodynamic shear matter for mammalian cell culture?
Excessive shear can damage fragile mammalian cells, especially those on microcarriers, affecting viability and product yield. The pneumatic bioreactor uses gentle air-driven mixing to reduce shear stress. This supports healthier cultures and more consistent protein expression.
How does real-time monitoring of pH and dissolved oxygen improve process control?
Real-time tracking allows immediate adjustments to maintain optimal culture conditions, preventing metabolic stress. The system logs pH and DO trends, enabling reproducible runs. This reduces batch failure and supports scalable process development.
What role do microcarriers play in scaling adherent cell production?
Microcarriers provide a surface for adherent cells to grow in suspension, enabling high-density culture in bioreactors. The system demonstrated 75% microcarrier colonization by 24 hours. This allows efficient scale-up of cell types that require attachment for growth.
Why is contamination risk lower in single-use bioreactor systems?
Single-use systems eliminate the need for cleaning and sterilization between runs, reducing human error and biofilm buildup. Components are pre-sterilized and discarded after use. This enhances process safety and accelerates campaign turnover.
What statistical analysis is needed to assess cell growth consistency across runs?
Growth curves, viability percentages, and doubling times should be compared using standard deviation and coefficient of variation. The article references viable cell counts reaching 1 million/mL post-infection. These metrics support statistical comparison of process performance and robustness.
Chapters in this video
0:05
Title
1:35
Login and Calibration
3:41
Autoclave, Sensor, and Reagent Vessel Installation
6:43
Medium- and Micro-carriers Addition, Equilibration, and One-point DO Calibration
8:28
Run Initiation, Cell Inoculation, and Sampling
10:11
Results: Characterization and Analysis of Bioreactor Cell Culture and Viral Growth
11:12
Conclusion
