YILIMART - StraightFrom Leukopak CD4/CD8 MB Kit

The StraightFrom

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Leukopak

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CD4/CD8 MicroBead Kit has been developed for the rapid simultaneous positive selection of CD4

⁺

and CD8

⁺

cells directly from a ½ Leukopak

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using the MultiMACS™ Cell24 Separator Plus for semi-automated separation or a MACS

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Separator for manual separation. No sample preparation is required, including density gradient centrifugation, erythrocyte lysis, wash steps, or cell count. Whole Blood Columns and Whole Blood Column Elution Buffer are included in the kit to allow direct processing of a ½ Leukopak

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.

Background information

The CD4 antigen is expressed on T helper (Tʜ) cells and at a lower level on monocytes and dendritic cells. The CD4 antigen is an accessory molecule in the recognition of MHC class II/peptide complexes by the TCR heterodimer on CD4

⁺

Tʜ cells. The CD8 antigen is expressed on cytotoxic T cells and on a subset of CD16

⁺

NK cells. The CD8 antigen acts as an accessory molecule in the recognition of MHC class I/peptide complexes by the TCR heterodimer on CD8

⁺

cytotoxic T cells.

Detailed separation procedure

A ½ Leukopak

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is labeled with StraightFrom

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Leukopak

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CD4/CD8 MicroBeads and loaded onto Whole Blood Columns, which are placed in the magnetic field of a MultiMACS™ Cell24 Separator Plus or a MACS

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Separator. After removing the column from the magnetic field, the magnetically retained CD4

⁺

and CD8

⁺

cells can be eluted as the positively selected cell fraction.

Downstream applications

The purified CD4

⁺

and CD8

⁺

cells are well suited for further flow cytometric, functional, or molecular analysis.

Figure 1

Separation of a Leukopak

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sample using the StraightFrom

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Leukopak

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CD4/CD8 MicroBead Kit and the MultiMACS™ Cell24 Separator Plus with the Multi-24 Column Blocks. Cells were fluorescently stained with REAfinity™ Antibodies CD4-PE-Vio

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770, CD8-APC, as well as CD45-VioBlue

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and analyzed by flow cytometry using the MACSQuant

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Analyzer. Viable leukocytes were gated for analysis based on scatter signals, propidium iodide fluorescence, and CD45 expression.