Immune cell surface and soluble proteins

Immune cell surface and soluble proteins represent a vast and diverse class of molecules essential for the coordination and execution of the immune response. Surface proteins, such as Cluster of Differentiation (CD) markers and major histocompatibility complex (MHC) molecules, facilitate cell-to-cell communication, antigen recognition, and signal transduction (Janeway et al., Immunobiology, 2001). Soluble proteins, including cytokines, chemokines, and complement factors, act as long-range messengers that regulate inflammation, cell recruitment, and systemic immunity (Dinarello, Eur J Immunol, 2007). These proteins are critical therapeutic targets in oncology, where checkpoint inhibitors modulate T-cell activity, and in autoimmune diseases, where monoclonal antibodies neutralize pro-inflammatory cytokines (Pardoll, Nat Rev Cancer, 2012). Because this term encompasses thousands of distinct molecules with varying functions, it is considered a broad category rather than a single druggable target (Zola et al., J Immunol Methods, 2007). As such, it does not refer to a specific protein but rather a functional group of proteins involved in immunological processes.

Other names

Immune system proteinsLeukocyte surface markersCytokines and chemokinesImmune receptors and soluble factors

Diverse mechanisms including receptor blockade, ligand neutralization, immune checkpoint inhibition, and agonism of costimulatory pathways.