Retinoic acid receptor beta (RAR-beta) and Retinoic acid receptor gamma (RAR-gamma) (RAR-beta/gamma)

Retinoic acid receptor beta (RAR-beta) and Retinoic acid receptor gamma (RAR-gamma) are nuclear receptors that function as ligand-dependent transcription factors [4, 12]. Upon binding to retinoic acid or synthetic retinoids, they heterodimerize with retinoid X receptors (RXRs) and bind to retinoic acid response elements (RAREs) in the promoters of target genes to regulate cell differentiation, proliferation, and apoptosis [4, 10, 15]. RAR-beta is frequently characterized as a tumor suppressor, with its expression often lost or silenced in various malignancies, including breast and lung cancers [3, 8, 12]. RAR-gamma is the predominant isotype in the skin and is also critical for skeletal development and matrix homeostasis [2, 5, 10]. Therapeutic agents like adapalene and tazarotene are designed to selectively target these receptors to treat dermatological conditions such as acne and psoriasis [2, 7, 13], while newer selective agonists like palovarotene are used to manage rare bone disorders like fibrodysplasia ossificans progressiva [5, 7]. These receptors are essential for normal development, and their dysregulation is linked to both oncogenesis and developmental abnormalities [4, 12, 16].

Other names

RARBRARGNR1B2NR1B3Retinoic acid receptor betaRetinoic acid receptor gammaRAR-betaRAR-gamma

Agonism of ligand-activated transcription factors [4, 12]; Heterodimerization with Retinoid X Receptor (RXR) [4, 10]; Binding to Retinoic Acid Response Elements (RARE) to regulate gene transcription [4, 15].