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Published on: July 19, 2024
Isolation of CD4+ T cells from murine lungs: a method to analyze ongoing immune responses in the lung
Kerstin A Sauer1, Petra Scholtes, Roman Karwot
1Laboratory of Cellular and Molecular Immunology of the Lung, University of Mainz, Germany.
Insights
This study details a method for isolating CD4+ lung T cells, crucial for understanding lung immunity. This technique provides pure cell populations for further immunological research in lung diseases.
Area of Science:
- Immunology
- Cell Biology
- Respiratory Medicine
Background:
- Cellular immune response regulation in lung diseases remains incompletely understood.
- Direct isolation of lung immune cells is vital for studying their function.
- Specific immune cell subsets play critical roles in lung health and disease.
Purpose of the Study:
- To describe a protocol for the isolation of CD4+ lung T cells.
- To enable detailed functional analysis of these cells within the lung microenvironment.
- To facilitate research into the cellular mechanisms underlying lung diseases.
Main Methods:
- Protocol for isolating and magnetically labeling CD4+ lung T cells using positive selection.
- Magnetic labeling and column-based separation technique.
- Yields approximately 5 x 10(5) to 1.5 x 10(6) CD4+ cells from murine lungs.
Main Results:
- Successful isolation of CD4+ lung T cells with high purity.
- Isolated cells are suitable for downstream analyses including flow cytometry, Western blot, RT-PCR, immunostaining, and ELISA.
- Demonstrated potential for adoptive transfer studies in immune-deficient mice.
Conclusions:
- The described protocol provides an efficient method for obtaining CD4+ lung T cells.
- This isolation technique supports comprehensive investigation of T cell function in lung immunity.
- Enables further research into the role of CD4+ T cells in lung disease pathogenesis.
Abstract:
The regulation of the cellular immune response in lung diseases is not yet fully understood. Isolating different subsets of immune cells directly from the lung is therefore an indispensable method of gaining detailed knowledge on the function of these cells in this organ. This protocol describes a method of isolating and magnetically labeling CD4+ lung T cells, which are then loaded and retained on the column while all other cells run through it (positive selection). The yield of this isolation is approximately 5 x 10(5) to 1.5 x 10(6) CD4+ cells from a murine lung. These cells can be further investigated by several methods such as flow cytometry, western blot analysis, RT-PCR, immunostaining and ELISA. In addition, lung CD4+ T cells alone or along with other immunologically important cells such as CD8+ T cells and T regulatory cells can be adoptively transferred into immune-deficient mice, and can influence important local parameters. This protocol can be completed in approximately 4 h 20 min.
