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Mononuclear cell (MNC) collection by continuous-flow centrifugation (CFC)
Abstract:
Mononuclear cell separation and collection by continuous-flow centrifugation relates to centrifugal acceleration, total blood processed, peripheral blood concentration, and probable mobilization from extravascular sites during the procedure. At low-G forces, 70-80% of mononuclear cells are cleared. As G forces are increased, 95-100% of mononuclear cells can be cleared, but excessive platelet depletion occurs. An average of three billion cells were harvested from 2-3 liters of blood, rising to nine billion when 6 liters were processed. The total blood processed is defined by citrate infusion rates and ionized calcium changes. Large quantities of mononuclear cells were collected from normal donors without any significant depletion. If the objective of harvesting mononuclear cells is depletion, intensive schedules may be needed.
Insights
Continuous-flow centrifugation effectively separates mononuclear cells, with higher G-forces increasing yield but risking platelet depletion. Optimal settings balance cell collection efficiency with blood component preservation for research or therapeutic applications.
Area of Science:
- Hematology
- Cellular Biology
- Biomedical Engineering
Background:
- Mononuclear cell separation is crucial for various research and clinical applications.
- Continuous-flow centrifugation offers a method for large-scale cell collection.
- Understanding the impact of centrifugation parameters on cell yield and quality is essential.
Purpose of the Study:
- To investigate the relationship between centrifugal forces and mononuclear cell recovery.
- To determine the effect of processing volume on cell yield.
- To assess the impact of continuous-flow centrifugation on blood components, particularly platelets.
Main Methods:
- Continuous-flow centrifugation was employed to process varying volumes of peripheral blood.
- Centrifugal forces (G-forces) were adjusted to evaluate their effect on cell separation.
- Parameters such as citrate infusion rates and ionized calcium levels were monitored.
Main Results:
- Lower G-forces cleared 70-80% of mononuclear cells, while higher G-forces achieved 95-100% clearance.
- Increased G-forces led to significant platelet depletion.
- Harvesting 2-3 liters of blood yielded approximately 3 billion cells, increasing to 9 billion with 6 liters processed.
- Mononuclear cells were collected in large quantities from normal donors without substantial depletion.
Conclusions:
- Continuous-flow centrifugation is an effective method for mononuclear cell collection.
- Optimizing G-forces is critical to maximize mononuclear cell yield while minimizing platelet loss.
- The volume of blood processed directly correlates with the total number of mononuclear cells harvested.