Estrogen receptor beta (ESR2) (ERβ)

Estrogen receptor beta (ERβ), encoded by the ESR2 gene, is a ligand-activated transcription factor belonging to the nuclear receptor superfamily (UniProt Q92731). It is primarily activated by endogenous estrogens, including 17β-estradiol and estrone, and plays a distinct role from Estrogen receptor alpha (ERα) in various physiological processes (NCBI Gene ID: 2100). ERβ is widely expressed in tissues such as the brain, bone, lungs, and the cardiovascular system, where it often mediates anti-proliferative and anti-inflammatory effects. In oncology, ERβ is frequently characterized as a tumor suppressor, as its activation can inhibit the growth of certain breast, prostate, and colon cancer cells (PMID: 28410626). In the central nervous system, ERβ is involved in neuroprotection and the regulation of mood and cognition, making it a potential target for neurodegenerative and psychiatric disorders (PMID: 23434550). Therapeutic development focuses on selective ERβ agonists to treat inflammatory conditions and specific cancers while avoiding the proliferative risks associated with ERα activation, such as endometrial hyperplasia.

Other names

ESR2NR3A2ER-betaErbEstrogen receptor 2

Ligand-activated transcription factor that, upon binding estrogens like estradiol or estrone, undergoes a conformational change, dimerizes, and translocates to the nucleus. It then binds to estrogen response elements (EREs) in the promoters of target genes or interacts with other transcription factors (e.g., AP-1, NF-kappaB) to modulate gene expression (PMID: 28410626). Drugs can act as full agonists, antagonists, or selective estrogen receptor modulators (SERMs) that exhibit tissue-specific activity.