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[Alveolar macrophages of sheep: purification and identification]
F Z Meniai-Belayat1, F Coignoul, K Meniai
1Faculté de médecine vétérinaire, chaire de pathologie générale, Bruxelles, Belgique.
Abstract:
Broncho-alveolar lavages of sheep lungs were performed for alveolar macrophage identification and purification. The total number of harvested cells was 1.5 x 10(8) cells per 600 ml fluid lavage, with a mean of 2.48 x 10(5) cells/ml. Cell viability was 97.14%. Alveolar macrophages represented 78% of cells harvested. Separation was carried out by adherence to plastic flasks followed by Percoll centrifugation. The best results (purity of macrophage population and cell viability) was obtained with Percoll solution and NaCl 1.5 mol.l-1 with a density of 1.033 and 1.050. Identification was carried out by the non specific esterase staining method. In conclusion, broncho-alveolar lavage of isolated sheep lung is a simple and reliable method of respiratory tract cell collection.
Insights
Broncho-alveolar lavage effectively collects sheep lung cells for research. This method reliably isolates alveolar macrophages, crucial for studying respiratory health.
Area of Science:
- Veterinary Science
- Immunology
- Cell Biology
Context:
- Alveolar macrophages play a critical role in lung immunity and disease.
- Efficient isolation of these cells is essential for research.
- Sheep lungs provide a relevant model for studying respiratory mechanisms.
Purpose:
- To establish an optimized protocol for collecting and purifying alveolar macrophages from sheep lungs.
- To evaluate the efficacy of broncho-alveolar lavage and Percoll centrifugation for cell isolation.
- To identify the best conditions for achieving high purity and viability of macrophages.
Summary:
- Broncho-alveolar lavage yielded 1.5 x 10(8) cells from 600 ml sheep lung lavage fluid, with 97.14% viability.
- Alveolar macrophages constituted 78% of the harvested cells.
- Optimal purity and viability were achieved using Percoll centrifugation with a Percoll solution and 1.5 mol/L NaCl at densities of 1.033 and 1.050, confirmed by non-specific esterase staining.
Impact:
- Provides a simple, reliable method for obtaining pure alveolar macrophages from sheep lungs.
- Facilitates further research into lung immunity, inflammation, and disease in a relevant animal model.
- Enhances the study of respiratory tract infections and conditions through improved cell isolation techniques.