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Affinity fractionation of lymphocytes using a monolithic cryogel
Ashok Kumar1, Fatima M Plieva, Igor Yu Galaev
1Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
Journal of Immunological Methods
|December 9, 2003
Summary
A novel cryogel affinity adsorbent enables efficient separation of B-lymphocytes from T-lymphocytes using protein A. This method preserves cell viability and offers a new strategy for cell fractionation in chromatography.
Area of Science:
- Biotechnology
- Immunology
- Materials Science
Background:
- Lymphocyte separation is crucial for immunological research and therapies.
- Existing methods can be complex or affect cell viability.
- Need for efficient and specific cell separation techniques.
Purpose of the Study:
- To develop a continuous, supermacroporous, monolithic, cryogel affinity adsorbent for lymphocyte separation.
- To establish a novel cell separation strategy based on protein A and IgG interactions.
- To evaluate the efficiency and viability of separated lymphocyte populations.
Main Methods:
- Development of a protein A-coupled dimethylacrylamide (DMAA) cryogel matrix.
- Chromatographic separation of human peripheral blood lymphocytes.
- Treatment of lymphocytes with goat anti-human IgG (H+L) to target B-lymphocytes.
- Elution of bound B-lymphocytes using human or dog IgG.
Main Results:
- High retention of IgG-positive B-lymphocytes (>90%) on the cryogel adsorbent.
- Enrichment of T-lymphocytes in the breakthrough fraction (81%).
- Isolated T-lymphocyte viability exceeded 90%.
- Recovery of 60-70% of B-cells with preserved viability after elution.
Conclusions:
- The developed cryogel affinity adsorbent provides an effective method for specific B-lymphocyte separation.
- The protein A-based strategy maintains high cell viability.
- This technique is broadly applicable to cell separation systems utilizing IgG antibodies against specific cell surface markers.