Retinoid-related orphan receptor gamma t (RORγt)

Retinoid-related orphan receptor gamma t (RORγt) is an isoform of the nuclear receptor RORγ, encoded by the RORC2 gene and most prominently expressed in immune cell subsets, including Th17 lymphocytes, immature thymocytes, and innate lymphoid cells[2][4][6]. RORγt acts as a lineage-defining transcription factor for Th17 cells, orchestrating their differentiation and regulating pro-inflammatory cytokine production, notably IL-17 and related cytokines[2][3][4]. It is essential not only for immune cell development and function but also plays a pivotal role in autoimmunity, lymphoid organogenesis, and cell survival by inhibiting apoptosis of thymocytes[1][2][4][6]. Pharmacologically, RORγt is a highly attractive therapeutic target, and multiple inverse agonists and allosteric inhibitors have been developed to treat Th17-mediated conditions such as psoriasis, rheumatoid arthritis, and other autoimmune diseases[1][2][3][7]. Safety concerns primarily stem from its central role in immune regulation and its expression profile in some malignancies[4][6].

Other names

ROR gamma tRORγtRetinoid-related orphan receptor γtRAR-related orphan receptor gamma tRORC2 (gene encoding RORγt)

Inverse agonists: Inhibit RORγt transcriptional activity, suppress Th17 cell differentiation and IL-17 production Allosteric inhibitors: Bind to non-classical sites of RORγt to prevent coactivator recruitment and transcriptional activation Ligand binding: Sterols and synthetic molecules modulate RORγt activity via the ligand-binding domain