SIGLEC1 (Sialic Acid Binding Ig-Like Lectin 1): Also known as sialoadhesin or CD169, SIGLEC1 is a member of the I-type lectins, recognizing sialic acid residues on cell surfaces. It is expressed primarily on macrophages and plays roles in cell-cell interactions, mediating binding to sialylated pathogens, and modulating immune responses. SIGLEC1 has been implicated in the regulation of immune surveillance and in the pathogenesis of infectious diseases and certain cancers....