A new multichamber counterflow centrifugation rotor with high-separation capacity and versatile potentials

Area of Science:

• Biomedical Engineering
• Cell Separation Technology
• Hematopoietic Stem Cell Transplantation

Background:

• Current methods for bone marrow processing are time-consuming.
• Efficient separation of hematopoietic stem cells is crucial for successful transplantation.
• Existing elutriation systems have limited capacity.

Purpose of the Study:

• To develop and evaluate a new closed system for counterflow centrifugation (elutriation).
• To increase the processing capacity of elutriation for bone marrow transplantation.
• To achieve rapid separation of bone marrow within 3 hours.

Main Methods:

• A novel closed system with a multi-chamber rotor (up to four chambers) for counterflow centrifugation was designed.
• The system was tested for simultaneous separation of single or multiple cell suspensions.
• Cell separation efficiency was assessed using normal blood and donor bone marrow.

Main Results:

• The multi-chamber system demonstrated identical low-density nucleated cell profiles across chambers.
• Leukocyte depletion from platelet concentrates was achieved with minimal cell loss.
• Over 98% of lymphocytes were removed from donor marrow within 3 hours.
• Recovery of myeloid and erythroid clonogenic cells was comparable to standard single-chamber systems.

Conclusions:

• The new closed elutriation system significantly increases processing capacity and efficiency.
• Rapid and effective cell separation for allogeneic bone marrow transplantation is achievable.
• This technology holds promise for improving bone marrow processing workflows.