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Updated: May 2, 2026
Isolation of CD4+ T cells from Mouse Lymph Nodes Using Miltenyi MACS Purification
Published on: November 1, 2007
Efficient isolation of CD8α positive T cells from postnatal mice using a combined MACS approach
Anastasia Hübner1, Katja Derkow2, Anja U Bräuer1
1Institute of Cell Biology and Neurobiology, Center for Anatomy, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany.
Abstract:
Magnetic activated cell sorting (MACS) is a commonly used cell separation technique. Miltenyi Biotec has developed an efficient MACS protocol for isolation of CD8α(+) T cells from adult mice spleen. However, due to a low percentage of CD8α(+) T cells in spleen of postnatal mice, MACS isolation of CD8α(+) T cells results in a low purity. Our study illustrates how this problem can be solved by performing a CD45R(+) B cell depletion prior to a positive selection of CD8α(+) T cells. This protocol can be used when low frequencies of CD8α(+) T cells are present in a tissue also populated with CD45R(+) B cells, and a high purity is required for downstream applications.
Insights
Improving magnetic activated cell sorting (MACS) for CD8α(+) T cells in mice. A new protocol enhances purity by first depleting CD45R(+) B cells, crucial for low-frequency cell isolation.
Area of Science:
- Immunology
- Cell Biology
- Biotechnology
Background:
- Magnetic activated cell sorting (MACS) is a standard technique for cell separation.
- Miltenyi Biotec offers a MACS protocol for isolating CD8α(+) T cells from adult mouse spleens.
- Low CD8α(+) T cell percentages in postnatal mouse spleens lead to low purity using standard MACS.
Purpose of the Study:
- To address the challenge of low purity in MACS isolation of CD8α(+) T cells from postnatal mouse spleens.
- To develop an improved MACS protocol for high-purity CD8α(+) T cell isolation when cell frequencies are low.
Main Methods:
- Implementing a CD45R(+) B cell depletion step before positive selection of CD8α(+) T cells.
- Utilizing magnetic activated cell sorting (MACS) technology.
- Applying the protocol to mouse spleen samples with low CD8α(+) T cell frequencies.
Main Results:
- The modified MACS protocol significantly enhances the purity of isolated CD8α(+) T cells.
- Successful isolation of CD8α(+) T cells from tissues with low initial cell frequencies.
- The protocol overcomes limitations of standard MACS in specific biological contexts.
Conclusions:
- A sequential depletion and positive selection MACS strategy improves CD8α(+) T cell purity.
- This enhanced protocol is valuable for downstream applications requiring high-purity cells.
- The method is applicable to isolating low-frequency target cells from mixed populations.
