TDS | SDS

The 53-6.7 antibody reacts with the 32-34 kDa alpha subunit of mouse CD8, known as CD8a or CD8 alpha. CD8a can form a homodimer (CD8 alpha-alpha), but is more commonly expressed as a heterodimer with a second chain known as CD8b or CD8 beta. CD8 acts as a co-receptor in antigen recognition and subsequent T cell activation that is initiated upon binding of the T cell receptor (TCR) to antigen-bearing MHC Class I molecules. The cytoplasmic domains of CD8 provide binding sites for the tyrosine kinase lck, facilitating intracellular signaling events that lead to T cell activation, development, and cytotoxic effector functions. CD8+ cytotoxic T cells (CTLs) play an important role in inducing cell death of tumor cells, as well as cells infected by virus, bacteria or parasites.

The 53-6.7 antibody is widely used as a phenotypic marker for mouse CD8a expression on cytotoxic T cells, thymocytes, as well as on certain cell types that do not also express the TCR, including some NK cells and lymphoid dendritic cells.

Recent Publications:

Brian BF 4th, Sauer ML, Greene JT, Senevirathne SE, Lindstedt AJ, Funk OL, Ruis BL, Ramirez LA, Auger JL, Swanson WL, Nunez MG, Moriarity BS, Lowell CA, Binstadt BA, Freedman TS. A dominant function of LynB kinase in preventing autoimmunity. Sci Adv. 2022 Apr 22;8(16):eabj5227. doi: 10.1126/sciadv.abj5227. Epub 2022 Apr 22. PMID: 35452291.

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Mishra S, Liao W, Liu Y, Yang M, Ma C, Wu H, Zhao M, Zhang X, Qiu Y, Lu Q, Zhang N. TGF-β and Eomes control the homeostasis of CD8+ regulatory T cells. J Exp Med. 2021 Jan 4;218(1):e20200030. doi: 10.1084/jem.20200030. PMID: 32991667; PMCID: PMC7527976.

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Sakamoto A, Maruyama M. Contribution of DOCK11 to the Expansion of Antigen-Specific Populations among Germinal Center B Cells. Immunohorizons. 2020;4(9):520-529. Published 2020 Sep 2. doi:10.4049/immunohorizons.2000048

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Liao, W., Ma, C., Zhang, N. Isolation of Mouse Kidney-Resident CD8⁺ T cells for Flow Cytometry Analysis. J. Vis. Exp. (160), e61559, doi:10.3791/61559 (2020).

Manz BN, Tan YX, Courtney A, Rutaganira F, Palmer E, Shokat KM and Weiss A. 2015. Elife. doi: 10.7554/eLife.08088. (Cell Separation)