Retinoic acid receptor-related orphan receptor beta (RORB)

Retinoic acid receptor-related orphan receptor beta (RORB) is a member of the NR1 subfamily of nuclear hormone receptors that functions as a ligand-dependent transcription factor (UniProt P62979). It is primarily expressed in the central nervous system, specifically in the suprachiasmatic nucleus (SCN), the cerebral cortex (layer IV), and the retina, where it plays a critical role in regulating circadian rhythms and neurodevelopment (PMID: 11849752). In the retina, RORB is essential for the differentiation of rod and cone photoreceptors, while in the brain, it influences cortical patterning and sensory processing (PMID: 21190010). Genetic variants and deletions of the RORB gene, particularly at the 9q21.13 locus, are strongly associated with epilepsy syndromes, intellectual disability, and autism spectrum disorders (PMID: 27352968). Beyond its neurological roles, RORB acts as a repressor of osteoblast differentiation, making it a potential target for treating age-related bone loss (PMID: 24125721). In oncology, RORB often functions as a tumor suppressor in cancers such as neuroblastoma and colorectal cancer, and its activity can be modulated by synthetic agonists and antagonists currently under investigation for various therapeutic applications (PMID: 38334123).

Other names

RORBNR1F2ROR-betaNuclear receptor subfamily 1 group F member 2Retinoid-related orphan receptor betaRAR-related orphan receptor betaEIG15

Modulation of RORB-mediated transcriptional activity through agonism, antagonism, or inverse agonism, and disruption of specific protein-protein interactions (e.g., RBM10-RORB) to regulate gene expression pathways involved in neurodevelopment, circadian rhythm, and tumor suppression.