Alexa Fluor^® 647 Armenian hamster Anti-Mouse CD48 Antibody (HM48-1)

CD48 is a glycosylphosphatidylinositol (GPI)-anchored cell surface glycoprotein belonging to the signaling lymphocytic activation molecule (SLAM) family, which plays a pivotal role in modulating immune responses by acting as both a receptor and a ligand for other SLAM family members, most notably CD2 and CD244 (2B4). Primarily expressed on hematopoietic cells such as T cells, B cells, natural killer (NK) cells, monocytes, and dendritic cells, CD48 lacks transmembrane and cytoplasmic domains, relying instead on its association with lipid rafts and adapter proteins like SAP (SLAM-associated protein) or EAT-2 to transmit intracellular signals that regulate lymphocyte activation, proliferation, cytokine production, and cytotoxicity. Its interactions are critical for fine-tuning the balance between immune activation and inhibition; for instance, the binding of CD48 to 2B4 on NK cells can either enhance or suppress cytotoxic activity depending on the presence of these adapter molecules, thereby influencing host defense against viral infections and tumor surveillance, while aberrant CD48 expression has also been implicated in various pathological conditions, including autoimmune diseases and hematological malignancies, making it a potential therapeutic target and biomarker in clinical immunology.