Cell surface immune receptor

Cell surface immune receptors are a broad class of transmembrane proteins expressed on leukocytes that facilitate the detection of and response to extracellular signals (Janeway's Immunobiology, 9th Ed). These receptors, including T-cell receptors, B-cell receptors, and various Cluster of Differentiation (CD) molecules, are fundamental for antigen recognition, cell-to-cell communication, and the regulation of immune homeostasis (Nature Reviews Immunology, 2020). In many pathologies, such as cancer, these receptors are co-opted to suppress immune surveillance, while in autoimmune diseases, they may be overactive or misdirected against self-antigens (Science, 2019). Therapeutic strategies often involve monoclonal antibodies that act as checkpoint inhibitors (e.g., targeting PD-1 or CTLA-4) or agents that deplete specific cell populations (e.g., targeting CD20) (NEJM, 2018). Understanding the spatial and temporal expression of these receptors is crucial for the development of targeted immunotherapies and diagnostic biomarkers (Cell, 2021). This entry is marked as incorrect because it represents a broad functional category of proteins rather than a single specific molecular target.

Other names

Immune cell surface receptorsLeukocyte surface antigensCD antigensCell surface immunoreceptorsImmune checkpoint receptors

Drugs targeting these receptors typically function through competitive inhibition of ligand binding (e.g., checkpoint blockade), agonistic activation of co-stimulatory pathways, or by inducing antibody-dependent cellular cytotoxicity (ADCC) and complement-dependent cytotoxicity (CDC) to deplete specific cell populations (Annual Review of Immunology, 2021).