RORα

RORα (retinoic acid receptor-related orphan receptor alpha, NR1F1) is a member of the nuclear receptor superfamily that functions as a ligand-regulated transcription factor by binding ROR response elements (ROREs) and regulating target gene transcription^[1]. RORα participates in fundamental biological processes including circadian rhythm regulation, inflammation, immune homeostasis, lipid metabolism, glucose metabolism, and cellular differentiation, thereby linking transcriptional control to systemic physiological regulation^[2][4]. Mechanistically, RORα directly modulates the expression of circadian clock genes such as BMAL1 and influences inflammatory signaling pathways including NF-κB, while also regulating metabolic gene networks involved in energy homeostasis^[2]. In disease contexts, altered RORα expression has been associated with cancer, metabolic disorders, cardiovascular pathology, and autoimmune diseases, and reduced RORα expression correlates with aggressive tumor phenotypes in several malignancies^[2]. Experimental studies further demonstrate that RORα contributes to immune regulation through its role in T helper 17 (Th17) cell biology, where combined deficiency of RORα and RORγ impairs Th17 development and reduces autoimmune pathology in animal models^[4]. Compared with related isoforms in the ROR family, RORα exhibits broader tissue distribution and distinct physiological functions, although partial functional overlap with RORγ has been reported in immune and metabolic regulation^[4]. For experimental applications, synthetic modulators have been developed to interrogate RORα signaling; the agonist SR1078 activates RORα-dependent transcriptional programs, whereas inverse agonists such as SR3335 and SR1001 suppress RORα activity and have been used to investigate metabolic and autoimmune disease mechanisms^[4][3].

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