Structural highlights
Function
[RORG_HUMAN] Possible nuclear receptor for hydroxycholesterols, the binding of which strongly promotes coactivators recruitment. Essential for thymopoiesis and the development of several secondary lymphoid tissues, including lymph nodes. Involved in lineage specification of uncommitted CD4(+) T-helper cells into Th17 cells. Regulate the expression of several components of the circadian clock.
Publication Abstract from PubMed
The inhibition of the nuclear receptor retinoic-acid-receptor-related orphan receptor gammat (RORgammat) is a promising strategy in the treatment of autoimmune diseases. RORgammat features an allosteric binding site within its ligand-binding domain that provides an opportunity to overcome drawbacks associated with orthosteric modulators. Recently, trisubstituted isoxazoles were identified as a novel class of allosteric RORgammat inverse agonists. This chemotype offers new opportunities for optimization into selective and efficacious allosteric drug-like molecules. Here, we explore the structure-activity relationship profile of the isoxazole series utilizing a combination of structure-based design, X-ray crystallography, and biochemical assays. The initial lead isoxazole (FM26) was optimized, resulting in compounds with a approximately 10-fold increase in potency (low nM), significant cellular activity, promising pharmacokinetic properties, and a good selectivity profile over the peroxisome-proliferated-activated receptor gamma and the farnesoid X receptor. We envisage that this work will serve as a platform for the accelerated development of isoxazoles and other novel chemotypes for the effective allosteric targeting of RORgammat.
Structure-Activity Relationship Studies of Trisubstituted Isoxazoles as Selective Allosteric Ligands for the Retinoic-Acid-Receptor-Related Orphan Receptor gammat.,Meijer FA, Saris AOWM, Doveston RG, Oerlemans GJM, de Vries RMJM, Somsen BA, Unger A, Klebl B, Ottmann C, Cossar PJ, Brunsveld L J Med Chem. 2021 May 19. doi: 10.1021/acs.jmedchem.1c00475. PMID:34008974[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Meijer FA, Saris AOWM, Doveston RG, Oerlemans GJM, de Vries RMJM, Somsen BA, Unger A, Klebl B, Ottmann C, Cossar PJ, Brunsveld L. Structure-Activity Relationship Studies of Trisubstituted Isoxazoles as Selective Allosteric Ligands for the Retinoic-Acid-Receptor-Related Orphan Receptor gammat. J Med Chem. 2021 May 19. doi: 10.1021/acs.jmedchem.1c00475. PMID:34008974 doi:http://dx.doi.org/10.1021/acs.jmedchem.1c00475
