|
| Primary information |
|---|
| ID | 11413 |
| Therapeutic ID | Th1247 |
| Protein Name | Glucagon |
| Sequence | >Th1247_Glucagon
HSQGTFTSDYSKYLDSRRAQDFVQWLMNT
|
| Molecular Weight | 3767.1 |
| Chemical Formula | C165H249N49O51S1 |
| Isoelectric Point | 7.1 |
| Hydrophobicity | NA |
| Melting point | NA |
| Half-life | The half life of glucagon is 26 minutes for an intramuscular dose.[L7634] The half life of glucagon nasal powder is approximately 35 minutes.[L7643] The half life of glucagon by a subcutaneous auto-injector or pre-filled syringe is 32 minutes.[L8519] |
| Description | Glucagon is a 29 amino acid hormone used as a diagnostic aid in radiologic exams to temporarily inhibit the movement of the gastrointestinal tract and to treat severe hypoglycemia.[L7634,L7637,L7640,L7643,L8519] Glucagon raises blood sugar through activation of hepatic glucagon receptors, stimulating glycogenolysis and the release of glucose.[L7640,L7643] Glucagon was granted FDA approval on 14 November 1960.[L7631] |
| Indication/Disease | Glucagon is indicated as a diagnostic aid in radiologic exams to temporarily inhibit the movement of the gastrointestinal tract and to treat severe hypoglycemia.[L7634,L7637,L7640,L7643,L8519] |
| Pharmacodynamics | Glucagon is indicated as a diagnostic aid in radiologic exams to temporarily inhibit the movement of the gastrointestinal tract and severe hypoglycemia.[A19402,L7634,L7637,L7640,L7643,L8519] Glucagon raises blood sugar through activation of hepatic glucagon receptors, stimulating glycogenolysis and the release of glucose.[L7640,L7643] Glucagon has a short duration of action.[L7634,L7637,L7640,L7643] Glucagon may cause hyperglycemia in diabetic patients.[L7634,L7637,L7640,L7643] |
| Mechanism of Action | Glucagon binds to the glucagon receptor activating Gsa and Gq.[A19402] This activation activates adenylate cyclase, which increases intracellular cyclic AMP and activates protein kinase A.[A19402] Activating Gq activates phospholipase C, increases production of inositol 1,4,5-triphosphate, and releases intracellular calcium.[A19402] Protein kinase A phosphorylates glycogen phosphorylase kinase, which phosphorylates glycogen phosphorylase, which phosphorylates glycogen, causing its breakdown.[A19402] Glucagon also relaxes smooth muscle of the stomach, duodenum, small bowel, and colon.[L7634,L7643] |
| Toxicity | Patients experiencing an overdose may present with nausea, vomiting, inhibition of GI tract motility, increased blood pressure and heart rate, and decreased serum potassium.[L7634,L7637,L7640,L7643] Phentolamine may be given to control blood pressure.[L7634,L7637,L7640,L7643] Treatment of glucagon overdose is largely symptomatic for nausea, vomiting, and hypokalemia.[L7637] The LD50 for intravenous glucagon in mice is 300mg/kg and in rats is 38.6mg/kg.[L7637] |
| Metabolism | Glucagon is a protein and so it is metabolized into smaller polypeptides and amino acids in the liver, kidney, and plasma.[L7634,L7643] |
| Absorption | A 1mg intravenous dose of glucagon reaches a Cmax of 7.9ng/mL with a Tmax of 20 minutes.[L7637] An intramuscular dose reaches a Cmax of 6.9ng/mL with a Tmax of 13 minutes.[L7637] A 3mg dose of glucagon nasal powder reaches a Cmax of 6130pg/mL with a Tmax of 15 minutes.[L7643] |
| The volume of distribution of glucagon is 0.25L/kg.[L7637] The apparent volume of distribution is 885L.[L7643] |
| Clearance | A 1mg intravenous dose of glucagon has a clearance of 13.5mL/min/kg.[L7637] |
| Categories | Glucagon, antagonists & inhibitors |
| Patents Number | NA |
| Date of Issue | NA |
| Date of Expiry | NA |
| Drug Interaction | NA |
| Target | Glucagon receptor,Glucagon-like peptide 2 receptor,Glucagon-like peptide 1 receptor |
| Brand Name | GlucaGen HypoKit |
| Company | Novo Nordisk |
| Brand Description | Novo Nordisk |
| Prescribed For | Intramuscular; Intravenous; Subcutaneous |
| Chemical Name | 1 mg/1mL |
| Formulation | GlucaGen is contraindicated in patients with:Known hypersensitivity to glucagon, lactose or any other constituent in GlucaGenPheochromocytoma [see WARNINGS AND PRECAUTIONS]Insulinoma [see WARNINGS AND PRECAUTIONS] |
| Physical Appearance | nausea, vomiting, and a temporary increase in blood pressure and pulse |
| Route of Administration | NA |
| Recommended Dosage | GlucaGen is used to treat severe hypoglycemic (low blood sugar) reactions which may occur in patients with diabetes mellitus treated with insulin. Because GlucaGen depletes glycogen stores, the patient should be given supplemental carbohydrates as soon as he/she awakens and is able to swallow, especially children or adolescents. Medical evaluation is recommended for all patients who experience severe hypoglycemia. |
| Contraindication | (3S)-3-[[(2S)-5-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S,3R)-2-[[2-[[(2S)-5-amino-2-[[(2S)-2-[[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]amino]-3-hydroxypropanoyl]amino]-5-oxopentanoyl]amino]acetyl]amino]-3-hydroxybutanoyl]amino]-3-phenylpropanoyl]amino]-3-hydroxybutanoyl]amino]-3-hydroxypropanoyl]amino]-3-carboxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-hydroxypropanoyl]amino]hexanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-4-methylpentanoyl]amino]-3-carboxypropanoyl]amino]-3-hydroxypropanoyl]amino]-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]propanoyl]amino]-5-oxopentanoyl]amino]-4-[[(2S)-1-[[(2S)-1-[[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-4-amino-1-[[(1S,2R)-1-carboxy-2-hydroxypropyl]amino]-1,4-dioxobutan-2-yl]amino]-4-methylsulfanyl-1-oxobutan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-1,5-dioxopentan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-4-oxobutanoic acid |
| Side Effects | GlucaGen is a sterile, lyophilized white powder in a 2 mL vial (appearance of the powder may vary, and occasionally the powder may appear compacted). The reconstituted solution contains glucagon as hydrochloride 1 mg/mL and lactose monohydrate (107 mg). GlucaGen is supplied at pH 2.5-3.5, hydrochloric acid and/or sodium hydroxide may be added to adjust pH, and is soluble in water. |
| Useful Link 1 | Link |
| Useful Link 2 | Link |
| Remarks | NA |