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Efficient purification of eosinophils from human tissues: a comparative study
A H Nissim Ben Efraim1, A Munitz, Y Sherman
1Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.
Journal of Immunological Methods
|February 3, 2009
Summary
Researchers developed an efficient method to purify eosinophils from nasal polyps. Negative selection offers better cell viability for in vitro studies of these key inflammatory cells.
Area of Science:
- Immunology
- Cell Biology
- Respiratory Medicine
Background:
- Eosinophils are crucial effector cells in allergic and inflammatory diseases.
- Current research often relies on peripheral blood eosinophils due to a lack of efficient tissue eosinophil purification methods.
- Studying tissue eosinophils is vital for understanding inflammatory responses in situ.
Purpose of the Study:
- To establish the most effective protocol for purifying eosinophils from nasal polyp tissue.
- To compare different purification methods for their efficiency, purity, and cell viability.
- To enable future in vitro studies on tissue-resident eosinophils.
Main Methods:
- Nasal polyps were minced and enzymatically digested to create a cell suspension.
- Two purification techniques were evaluated: positive magnetic selection (CCR3+) and negative magnetic selection (CD3/CD14/CD16).
- Purified eosinophils were cultured with cytokines (IL-3, IL-5, GM-CSF) and assessed for viability via flow cytometry.
Main Results:
- Tissue-derived eosinophils showed comparable surface receptor expression to peripheral blood eosinophils.
- Positive selection yielded high purity (>90%) but lower viability (63%).
- Negative selection resulted in lower purity (66%) but significantly higher viability (88%), suitable for in vitro activation.
Conclusions:
- Eosinophils can be successfully purified from nasal polyp tissue.
- Negative selection is advantageous for preserving eosinophil viability, facilitating in vitro culture and activation.
- This method advances the study of tissue eosinophils in inflammatory conditions.
