Anti-CD8 (Cluster of Differentiation 8, CD8) CE/IVD antibodies for immunohistochemistry (IHC) are essential reagents in hematopathology, enabling accurate identification of cytotoxic T-cell populations and characterization of immune infiltrates in both lymphoid and non-lymphoid tissues. CD8-targeted IHC is widely used in diagnostic pathology, tumor immunology, and prognostic evaluation.
Biological Significance of CD8
- CD8 is a transmembrane glycoprotein primarily expressed on cytotoxic T lymphocytes (CTLs), acting as a co-receptor for the T-cell receptor (TCR) that recognizes major histocompatibility complex (MHC) class I molecules.
- Exists mainly as a CD8α/β heterodimer linked by disulfide bonds.
- Enhances antigen-specific TCR signaling and stabilizes peptide–MHC interactions.
- Expressed on CTLs and minor subsets of natural killer and dendritic cells.
- Plays a central role in cytotoxic immune responses against infected and malignant cells.
Diagnostic Utility of CD8 in Hematopathology
- Identification of cytotoxic T-cell populations in T-cell lymphomas and leukemias.
- Characterization of CD8-positive subsets in peripheral and cutaneous T-cell lymphomas.
- Evaluation of tumor-infiltrating lymphocytes (TILs), where CD8+ density correlates with prognosis in multiple cancers.
- Reliable marker for immune microenvironment assessment in formalin-fixed paraffin-embedded (FFPE) tissues.
Key Features of CD8 CE/IVD Antibodies for IHC
- High specificity and sensitivity for membranous CD8 detection in FFPE samples.
- Monoclonal antibody formats ensuring reproducibility and lot-to-lot consistency.
- Validated performance in standardized IHC protocols for diagnostic reliability.
- Compatibility with chromogenic detection systems (e.g., DAB) and automated staining platforms.
- Defined membranous staining patterns enabling clear interpretation of CD8-positive lymphocytes.
