HLA-DM 抑制因子

HLA-DM is a non-classical major histocompatibility complex (MHC) class II molecule that serves a pivotal role in the antigen presentation pathway. Unlike classical MHC class II molecules like HLA-DR, HLA-DQ, and HLA-DP, which directly present antigenic peptides to CD4+ T cells, HLA-DM operates intracellularly within specialized compartments like endosomes and lysosomes. It facilitates the peptide-loading process by catalyzing the exchange of CLIP (class II-associated invariant chain peptide) for antigenic peptides on the MHC class II binding groove. Furthermore, HLA-DM can act as a peptide editor, removing suboptimal peptides to ensure that higher-affinity peptides are presented by MHC class II molecules. Primarily expressed in antigen-presenting cells such as dendritic cells, B cells, and macrophages, HLA-DM thus serves as a critical modulator of the adaptive immune response by shaping the repertoire of peptides that are ultimately presented to T cells.

HLA-DM inhibitors encompass a variety of chemical structures, including small molecules, peptides, and synthetic analogs of naturally occurring peptides. Researchers have also explored nucleotide-based inhibitors, metal complexes, and peptidomimetics as agents that can interfere with HLA-DM function. The development of HLA-DM inhibitors relies heavily on computer-aided drug design techniques, including virtual screening and molecular docking studies, to identify compounds with high binding affinity and specificity for HLA-DM. The ongoing exploration of these inhibitors aims to unravel the complexities of the antigen presentation pathway and may have implications for understanding immune regulation and immune-related disorders.