A rapid method for purification of human granulocytes using percoll. A comparison with dextran sedimentation

Area of Science:

• Hematology
• Cell Biology
• Biotechnology

Background:

• Efficient purification of human granulocytes is crucial for research and clinical applications.
• Conventional methods like dextran sedimentation are often time-consuming and may affect cell viability.
• A need exists for a rapid, high-yield, and gentle granulocyte isolation technique.

Purpose of the Study:

• To describe a simple, one-step method for purifying human granulocytes.
• To evaluate the yield, purity, and functional integrity of granulocytes isolated using this method.
• To compare the efficacy of this new method with conventional dextran sedimentation.

Main Methods:

• Human granulocytes were purified using a discontinuous gradient of Percoll in a single step.
• Cell yield and purity were determined.
• Trypan blue exclusion and phagocytic function assays were performed to assess cell viability and functionality.

Main Results:

• The Percoll gradient method achieved a 55% cell yield with 97% granulocyte purity.
• Isolated granulocytes demonstrated intact trypan blue exclusion, indicating high viability.
• Phagocytic functions of the purified granulocytes remained unaltered.
• The Percoll method was significantly faster than dextran sedimentation.

Conclusions:

• Centrifugation in Percoll provides a superior, efficient, and time-saving method for human granulocyte purification.
• This technique preserves granulocyte viability and function, making it suitable for various applications.
• The method offers advantages over traditional dextran sedimentation for granulocyte isolation.