Adoption of the New Nomenclature of Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD) by INASL
Retatrutide Structure and Chemistry Retatrutide builds on the engineering principles refined in semaglutide and tirzepatide: Glucagon-based peptide backbone retatrutide is derived from glucagon, with modifications to give it activity at all three target receptors Strategic amino acid substitutions multiple substitutions tune the receptor activity balance across GLP-1R, GIPR, and glucagon receptor Fatty acid chain attached for albumin binding and extended half-life (similar strategy to semaglutide and tirzepatide) Aminoisobutyric acid substitutions protect against DPP-4 enzymatic degradation The triple-agonist design is technically demanding because each receptor has different binding requirements
The FDA requires these medications to include a warning about the potential interactions with grapefruit for people who take these drugs
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The niacinamide dose in these formulations is relatively modest
Specifically, we selected the cyclic GMPAMP phosphodiesterase from Penguinpox (cGAMP PDE), which shares 24% sequence identity with the closest protein in the PDB and inhibits host STING signaling by degrading cyclic dinucleotides [Hobbs et al., 2024]
