Retinoic acid receptor beta and Retinoic acid receptor gamma (RAR-β and RAR-γ)

Retinoic acid receptor beta (RAR-β) and retinoic acid receptor gamma (RAR-γ) are members of the nuclear hormone receptor superfamily known as retinoic acid receptors (RARs), which also includes RAR-alpha[2][4]. These receptors are ligand-dependent transcription factors that typically form heterodimers with retinoid X receptors (RXRs). Upon binding to their ligands—retinoic acid or synthetic retinoids—they regulate the transcription of genes involved in development, cell differentiation, and homeostasis[1][2][4]. RAR-beta and RAR-gamma have overlapping yet distinct biological functions, contribute to different transcription patterns even in the absence of ligand, and play important roles in tissues such as the skin, immune system, and various organs[1][4]. Both are considered key therapeutic targets for retinoid-based drugs in the treatment of skin diseases (such as acne and psoriasis) and certain cancers[3][4]. Their precise biological roles reflect their differential tissue distributions, coregulator interactions, and ligand selectivity[1][2][4].

Other names

RAR-betaRAR-βNR1B2 (for RAR-beta)RAR-gammaRAR-γNR1B3 (for RAR-gamma)Nuclear receptor subfamily 1 group B member 2 (RAR-beta)Nuclear receptor subfamily 1 group B member 3 (RAR-gamma)

Agonists (e.g., Adapalene, ATRA) activate the receptor to induce transcription of retinoic acid-responsive genes[1][3] Some antagonists block ligand binding to inhibit gene transcription