Similarly, VK2809 has shown significant reductions in hepatic fat content and was well tolerated in phase IIb trials (161)
It is important to note that, as of mid-2025, retatrutide has not received marketing authorisation from the Medicines and Healthcare products Regulatory Agency (MHRA) or the European Medicines Agency (EMA)
Activated IGF-1R phosphorylates insulin receptor substrate proteins (IRS-1 and IRS-2), which recruit and activate PI3K
How GLP-1 drugs work While our natural GLP-1 hormone is very effective, it is also very short-lived the body breaks it down in just a few minutes
GLP-1s, or GLP-1 receptor agonists, are medications that mimic the action of the naturally occurring hormone glucagon-like peptide-1 and occupy its receptors
J Immunol 166(3):15071516 Ma X, Zhu Y, Dong D, Chen Y, Wang S, Yang D, Ma Z, Zhang A, Zhang F, Guo C et al (2022) Cryo-EM structures of two human B cell receptor isotypes