Liraglutide is a synthetic glucagon-like peptide-1 (GLP-1) receptor agonist with over 97% sequence similarity to natural human GLP-1. Its CAS number is 204656-20-2, its molecular formula is C172H265N43O51, and its molecular weight is 3751.20. As a high-purity bioactive molecule, its purity typically reaches 99.95%, and it appears as a white or off-white solid powder. Storage conditions are extremely strict; the powder must be stored in a light-protected, sealed container at -80°C or -20°C, and after dissolution, it must be stored at -80°C. Common packaging sizes include 1mg, 5mg, 10mg, 25mg, 50mg, and even 100mg.
Functionally, liraglutide exerts multiple physiological regulatory effects by binding to the same receptor as the endogenous metabolic hormone GLP-1. It not only promotes insulin release and reduces glucagon secretion to control blood sugar, but also slows gastric emptying, suppresses appetite, and promotes fat metabolism.
Its core advantage lies in its unique molecular structure modification (adding a fatty acid side chain at lysine position 26), which overcomes the degradation disadvantage of natural GLP-1, allowing for long-lasting effects with only one subcutaneous injection daily. Furthermore, it demonstrates excellent clinical efficacy in lowering blood sugar and weight loss, and significantly reduces the risk of major adverse cardiovascular events in patients with type 2 diabetes and cardiovascular disease.
However, liraglutide also has significant drawbacks and limitations. First, as a prescription drug, it has strict contraindications, such as a history or family history of medullary thyroid carcinoma, and is contraindicated in pregnant and breastfeeding women. Second, gastrointestinal adverse reactions (such as nausea, diarrhea, and vomiting) are very common, especially at the beginning of treatment. Additionally, when used in combination with sulfonylureas, it increases the risk of hypoglycemia.
In terms of application, liraglutide is primarily targeted at clinical medicine and scientific research. Clinically, it is widely used for glycemic control in adults with type 2 diabetes and for long-term weight management in obese or overweight patients. In research, it is used as a GLP-1 receptor agonist for in vitro and in vivo mechanism studies of type 2 diabetes, metabolic syndrome, and related cellular pathways (such as the AMPK/SREBP1 pathway).
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