MAX gene-associated protein (MGA) mRNA (MGA)

MAX gene-associated protein (MGA) is a high-molecular-weight transcription factor that serves as a critical regulator within the MYC/MAX/MAD network and the non-canonical Polycomb Repressive Complex 1.6 (ncPRC1.6) (UniProt Q9UWI4). It contains both a T-box domain and a basic helix-loop-helix leucine zipper (bHLH-Zip) domain, enabling it to bind diverse DNA motifs and repress genes involved in the cell cycle and germ cell development (PubMed: 10591211). MGA is predominantly characterized as a tumor suppressor, and its genetic or epigenetic inactivation is a frequent driver in lung adenocarcinoma, colorectal cancer, and chronic lymphocytic leukemia (PubMed: 34238724, 30135580). Therapeutic strategies targeting MGA mRNA include the use of antisense oligonucleotides (ASOs) to inhibit oncogenic truncated isoforms or mRNA-based replacement therapies to restore full-length protein function in deficient cells (PubMed: 30135580). Recent research also suggests that MGA may be a target for enhancing immunotherapy in triple-negative breast cancer by modulating the tumor immune landscape (PNAS: 2406325121). Although no MGA-targeted drugs have reached the clinic, the target is of high interest for its ability to modulate the MYC pathway, which is traditionally considered undruggable.

Other names

MAD5MAX-associated proteinMGADMGA

Restoration of tumor suppressor function via mRNA delivery or inhibition of truncated isoforms via antisense oligonucleotides.