Related Experiment Videos
Murine pulmonary macrophages: evaluation of lung lavage fluids, miniaturized monolayers, and candidacidal activity
Abstract:
Optimal yields of pulmonary macrophages (PuM) from lavage of normal murine lungs have been obtained by the study of several different lung lavage fluids. Approximately 1 X 10(6) PuM can be consistently recovered from mice weighing 20 to 30 g, using 15 ml of phosphate buffered saline with 0.1% EDTA, with or without 10% fetal calf serum at 37 degrees C. Use of Terasaki tray wells for monolayer formation has allowed a relatively small number of cells (75,000) to be used to prepare multiple replicate wells from each mouse. Simultaneous functional comparisons with other cell types, e.g., peritoneal macrophages (PeM) were performed using this practical and economical system. Data on the phagocytosis and killing of Candida albicans by PuM and PeM are presented as evidence of the utility of this miniaturized system.
Insights
Researchers optimized pulmonary macrophage (PuM) isolation from mouse lungs. This practical method yields abundant PuM for functional studies, enabling comparisons with peritoneal macrophages (PeM).
Area of Science:
- Immunology and Cell Biology
- Respiratory Medicine
Background:
- Pulmonary macrophages (PuM) are crucial for lung immunity and homeostasis.
- Efficient isolation of viable PuM is essential for functional studies.
- Current methods may not be optimal for yield or downstream applications.
Purpose of the Study:
- To establish an optimized protocol for isolating high yields of pulmonary macrophages (PuM) from murine lungs.
- To validate the utility of this method for functional assays, including phagocytosis and pathogen killing.
- To enable direct comparison of PuM function with peritoneal macrophages (PeM) using a miniaturized system.
Main Methods:
- Evaluation of various lung lavage fluids for optimal PuM recovery.
- Standardized isolation procedure using phosphate-buffered saline with EDTA and fetal calf serum.
- Utilization of Terasaki tray wells for monolayer formation and functional assays with limited cell numbers (75,000 cells).
Main Results:
- Consistent recovery of approximately 1 x 10^6 PuM from 20-30g mice using the optimized lavage fluid.
- Successful establishment of PuM and PeM monolayers in micro-wells for parallel functional testing.
- Demonstrated phagocytosis and killing of Candida albicans by both PuM and PeM, validating the system's utility.
Conclusions:
- The developed method provides optimal yields of pulmonary macrophages for research.
- This practical and economical miniaturized system facilitates functional comparisons between macrophage populations.
- The protocol is suitable for studying macrophage functions like phagocytosis and antimicrobial activity.