Glucagon
Glucagon is a 29-amino-acid pancreatic hormone produced by the alpha cells of the islets of Langerhans. It is the physiological counterpart to insulin and raises blood glucose via hepatic glycogenolysis and gluconeogenesis. It is approved as an emergency treatment for severe hypoglycaemia and as a diagnostic aid; its receptor is also a target of modern dual and triple incretin agonists.
Mechanism of action
Glucagon is produced in the alpha cells of the pancreas (islets of Langerhans) and released when blood sugar is low. Glucagon binds the glucagon receptor (GCGR), a G-protein-coupled receptor expressed predominantly on hepatocytes. Activation stimulates adenylate cyclase, raises cyclic AMP and activates protein kinase A. This drives glycogenolysis (breakdown of hepatic glycogen into glucose) and gluconeogenesis (de novo glucose synthesis), which raises blood glucose. Glucagon also promotes lipolysis. As the counterpart to insulin it contributes to glucose homeostasis. It transiently relaxes gastrointestinal smooth muscle, which is the basis of its diagnostic use in imaging.
L'evidenza in sintesi
Cosa mostrano gli studi
Dove gli studi divergono
Does glucagon's therapeutic value lie in agonism or antagonism?
Farmacocinetica
Curva teorica di concentrazione con un'emivita di 0.13 h. Modello puramente farmacocinetico — non una raccomandazione di dose.
Open in PK tool →Vie di somministrazione nella letteratura
Uso più sicuro e rischi
Eventi avversi noti dagli studi
Interazioni e combinazioni
Rischi e aspetti igienici nella letteratura
Contraindications in hormone-producing tumours
Voci regolatorie
Baqsimi is indicated for the treatment of severe hypoglycaemia in patients with diabetes ages one year and older and is the first approved glucagon therapy that can be administered without an injection.
Osservazioni aneddotiche
Stato legale per paese
Calcolatore di ricostituzione
I peptidi arrivano come polvere secca. Una volta disciolti in un liquido (ricostituzione), questo calcolatore risponde a una sola domanda: quanta sostanza c'è in un millilitro di soluzione dopo?
- 1Inserisci la quantità di sostanza del flacone (riportata sull'etichetta).
- 2Inserisci quanto solvente aggiungi.
- 3Risultato = concentrazione in mg per mL.
Registro degli studi
Intranasal Glucagon for Treatment of Insulin-Induced Hypoglycemia in Adults With Type 1 Diabetes: A Randomized Crossover Noninferiority Study
Faster Use and Fewer Failures with Needle-Free Nasal Glucagon Versus Injectable Glucagon in Severe Hypoglycemia Rescue: A Simulation Study
Glucagon Stimulation Testing in Assessing for Adult Growth Hormone Deficiency: Current Status and Future Perspectives
Triple-Hormone-Receptor Agonist Retatrutide for Obesity - A Phase 2 Trial
Fonti e metodologia
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