Download MendeleyMolecular glues of the regulatory ChREBP/14-3-3 complex protect beta cells from glucolipotoxicity.
Katz, L.S., Visser, E.J., Plitzko, K.F., Pennings, M., Cossar, P.J., Tse, I.L., Kaiser, M., Brunsveld, L., Scott, D.K., Ottmann, C.(2024) bioRxiv
- PubMed: 38405965
- DOI: https://doi.org/10.1101/2024.02.16.580675
- Primary Citation of Related Structures:
8BTQ, 8BWE, 8BWH, 8C1Y - PubMed Abstract:
The Carbohydrate Response Element Binding Protein (ChREBP) is a glucose-responsive transcription factor (TF) that is characterized by two major splice isoforms (α and β). In acute hyperglycemia, both ChREBP isoforms regulate adaptive β-expansion; however, during chronic hyperglycemia and glucolipotoxicity, ChREBPβ expression surges, leading to β-cell dedifferentiation and death. 14-3-3 binding to ChREBPα results in its cytoplasmic retention and concomitant suppression of transcriptional activity, suggesting that small molecule-mediated stabilization of this protein-protein interaction (PPI) via molecular glues may represent an attractive entry for the treatment of metabolic disease. Here, we show that structure-based optimizations of a molecular glue tool compound led not only to more potent ChREBPα/14-3-3 PPI stabilizers but also for the first time cellular active compounds. In primary human β-cells, the most active compound stabilized the ChREBPα/14-3-3 interaction and thus induced cytoplasmic retention of ChREBPα, resulting in highly efficient β-cell protection from glucolipotoxicity while maintaining β-cell identity. This study may thus not only provide the basis for the development of a unique class of compounds for the treatment of Type 2 Diabetes but also showcases an alternative 'molecular glue' approach for achieving small molecule control of notoriously difficult targetable TFs.
- Diabetes, Obesity and Metabolism Institute and Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1152, New York, 10029, USA.
Organizational Affiliation:
