Modeled after the mammalian circulatory system, hollow fiber bioreactors offer the most in-vivo like manner to grow cells in any laboratory. These fibers then create a semi-permeable barrier of defined molecular weight cut-off (MWCO) between the compartment in which the cells are growing and the medium is flowing.
How does a perfusion bioreactor work?
Perfusion is a continuous culturing method in which cells are either retained in the bioreactor or fed back into it. The harvested medium thus contains no cells, resulting in higher cell concentrations and product yields in the reactor while still reducing the working volume.
How does a hollow fiber membrane work?
Inside a hollow fiber membrane water filter, hundreds of tubes—resembling tiny straws—are bundled together to create a filter matrix. That is, the pores in the fibers’ walls are simply too small for the pathogens to fit through, but water still can. These pores so microscopic, they’re invisible to the naked eye.
What is hollow Fibre technology?
What is hollow fiber membrane technology? Hollow fiber membranes are fine filters that act as selective membranes to remove particles based on their size. The membrane surfaces feature fine pores that determine which particles will pass through based on a molecular weight cut-off value.
What is hollow fiber culture?
Hollow fiber bioreactors (HFBs) are a 3D culture system that consist of fibers fixed into a module with cells typically seeded on the outside of the porous fibers and media delivered through the fiber lumen (reviewed in10) (Figure 1).
What are the advantages of culturing cells in bioreactor?
Bioreactors allow long-term cell growth by a flux of media and continuous supply with nutrients, gases, and removal of waste and metabolites. The main advantage of bioreactors is keeping in culture high amounts of cells for a long time in the same device.
What is perfusion rate in bioreactor?
In a perfusion process, cells are retained inside the bioreactor and there is a constant exchange of medium—fresh medium is provided to the cells at the same rate as the spent medium (cell waste products and medium depleted of nutrients by cell metabolism) is removed.
What is perfusion system?
Perfusion is the passage of fluid through the circulatory system or lymphatic system to an organ or a tissue, usually referring to the delivery of blood to a capillary bed in tissue. All animal tissues require an adequate blood supply for health and life.
What are the advantages of hollow fiber membranes compared to other geometries?
Advantages. Hollow fiber membranes feature a very high packing density because of the small strand diameter. Because of the flexibility of the strands, certain filter configurations are possible that cannot be achieved in other filtration configurations.
What is the difference between microfibre and Hollowfibre?
The biggest difference between hollowfibre and microfibre is the structure. The fine fibres of microfibre allow minimal space between them, creating a tightly woven fabric. Whereas hollowfibre does have spaces between its fibres, which is how it received its name. Microfibre is warmer and better for Winter.
What is hollow fiber filtration?
Hollow fiber filtration utilizes thousands of long, porous filaments ranging from 1-3.5mm wide, that are potted in place in a PVC shell. Each filament is very narrow in diameter and flexible. Hollow fiber can find uses in all types of filtration, ranging from microfiltration to reverse osmosis.
Hollow fiber bioreactor. Cell culture medium is pumped through the IC space and delivers oxygen and nutrients to the cells via hollow fiber membrane perfusion. As the cells expand, their waste products and CO 2 also perfuse the hollow fiber membranes and are carried away by the pumping of medium through the IC space.
What are the two compartments of a bioreactor?
Within the cartridges, which are also fitted with inlet and outlet ports, are two compartments: the intracapillary (IC) space within the hollow fibers, and the extracapillary (EC) space surrounding the hollow fibers. Cells are seeded into the EC space of the hollow fiber bioreactor and expand there.
What is hollow fiber membrane perfusion in cell culture media?
Cell culture medium is pumped through the IC space and delivers oxygen and nutrients to the cells via hollow fiber membrane perfusion. As the cells expand, their waste products and CO 2 also perfuse the hollow fiber membranes and are carried away by the pumping of medium through the IC space.
What is the volume of a hollow fiber cartridge?
Because thousands of hollow fibers may be packed into a single hollow fiber bioreactor, they increase the surface area of the cartridge considerably. As a result, cells can fill up the EC space to densities >10 8 cells/ml. However, the cartridge itself takes up a very small volume (oftentimes the volume of a 12-oz soda can).
