CD8 [C8/1779R] is a rabbit monoclonal antibody that is intended for laboratory use in the qualitative identification of CD8a protein by immunohistochemistry (IHC) in formalin-fixed paraffin-embedded (FFPE) human tissues. The clinical interpretation of any staining or its absence should be complemented by morphological studies using proper controls and should be evaluated within the context of the patient’s clinical history and other diagnostic tests by a qualified pathologist.
CD8 is a cell surface glycoprotein member of the immunoglobulin superfamily. CD8 consists of two chains, alpha and beta, which are expressed as a disulfide-linked alpha/beta heterodimer or as an alpha/alpha homodimer on a subset of T-cells, thymocytes and NK cells (1). The majority of CD8+ T cells express CD8 as alpha/beta heterodimer. CD8 functions as a co-receptor in concert with T cell receptor for binding the MHC class I/peptide complex (1). CD8 has been shown to be an important marker to analyze T-cell mediated inflammatory dermatoses, is useful for analysis of mycosis fungoides and other T cell lymphomas, and plays a critical role in anti-tumor responses and tumor microenvironment (2-4).