Retinoic acid-induced protein 2 (RAI2)

Retinoic acid-induced protein 2 (RAI2) is an intronless, protein-coding gene located on the X chromosome that is upregulated by retinoic acid and is involved in development, cellular growth, and differentiation[1][5]. It functions primarily as a transcriptional coregulator, modulating gene expression through interaction with proteins such as C-terminal binding proteins (CtBP1/2), and is implicated in hormonal response pathways including androgen signaling[2][4]. RAI2 has recently been characterized as a tumor suppressor, with reduced expression correlating with worse prognosis and increased metastatic potential in breast, colorectal, and prostate cancer[6][8]. Its expression or methylation state is being evaluated as a prognostic biomarker, but it is not presently the direct target of any therapeutic drug. RAI2 is also a genetic candidate for several developmental disorders based on its chromosomal location and expression profile[5].

Other names

Retinoic acid induced 2RAI2Retinoic acid-induced protein 2

Not applicable (no direct targeted drugs). Mechanistically, RAI2 acts as a tumor suppressor by interacting with corepressors (e.g., CtBP1/2), inhibiting epithelial–mesenchymal transition (EMT), and negatively modulating Wnt/β-catenin and AKT signaling pathways[2][4][8].