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| Primary information |
|---|
| ID | 10254 |
| Therapeutic ID | Th1035 |
| Protein Name | Glucagon recombinant |
| Sequence | >Th1035_Glucagon_recombinant
HSQGTFTSDYSKYLDSRRAQDFVQWLMNT
|
| Molecular Weight | 3767.1 |
| Chemical Formula | C165H249N49O51S1 |
| Isoelectric Point | 7.1 |
| Hydrophobicity | -1.197 |
| Melting point | NA |
| Half-life | 0.53 hours for subcutaneous auto-injector or pre-filled syringe |
| Description | Glucagon is a 29 residue peptide hormone, synthesized in a special non- pathogenic laboratory strain of Escherichia coli bacteria that has been genetically altered by the addition of the gene for glucagons. |
| Indication/Disease | Used to treat severe hypoglycemia, also used in gastrointestinal imaging. |
| Pharmacodynamics | Used in the treatment of hypoglycemia and in gastric imaging, glucagon increases blood glucose concentration and is used in the treatment of hypoglycemia. Glucagon acts only on liver glycogen, converting it to glucose through the release of insulin. It also relaxes the smooth muscles of the gastrointestinal tract. |
| Mechanism of Action | Glucagon binds the glucagon receptor(G protein-coupled receptor located in the plasma membrane) which then initiates a dual signaling pathway using both adenylate cyclase activation and increased intracellular calcium. Adenylate cyclase manufactures cAMP (cyclic AMP), which activates protein kinase A (cAMP-dependent protein kinase). This enzyme, in turn, activates phosphorylase kinase, which, in turn, phosphorylates glycogen phosphorylase, converting into the active form called phosphorylase A. Phosphorylase A is the enzyme responsible for the release of glucose-1-phosphate from glycogen polymers. This yields glucose molecules to be released into the blood. Glucagon receptors are found in the liver, kidney, brain and pancreatic islet cells. The glucagon mediated signals lead to an increase in insulin excretion |
| Toxicity | atients experiencing an overdose may present with nausea, vomiting, inhibition of GI tract motility, increased blood pressure and heart rate, and decreased serum potassium. Phentolamine may be given to control blood pressure. Treatment of glucagon overdose is largely symptomatic for nausea, vomiting, and hypokalemia. |
| Metabolism | Glucagon is a protein and so it is metabolized into smaller polypeptides and amino acids in the liver, kidney, and plasma. |
| Absorption | A 1mg intravenous dose of glucagon reaches a Cmax of 7.9ng/mL with a Tmax of 20 minutes.An intramuscular dose reaches a Cmax of 6.9ng/mL with a Tmax of 13 minutes. A 3mg dose of glucagon nasal powder reaches a Cmax of 6130pg/mL with a Tmax of 15 minutes |
| 0.25 L/kg |
| Clearance | 13.5 mL/min/kg [Adults with IV 1 mg] |
| Categories | Amino Acids, Peptides, and Proteins, Antihypoglycemic Agent, Decreased GI Motility, Decreased GI Smooth Muscle Tone, Decreased Glycolysis, Gastrointestinal Agents, Gastrointestinal Hormones, Gastrointestinal Motility Inhibitor, Glucagon, antagonists & inhibitors, Glycogenolytic Agents, Glycogenolytic Hormones, Hormones, Hormones, Hormone Substitutes, and Hormone Antagonists, Increased Gluconeogenesis, Increased Glycogenolysis, Pancreatic Hormones, Peptide Hormones, Peptides, Proglucagon, Protein Precursors, Proteins, Systemic Hormonal Preparations, Excl. Sex Hormones and Insulins |
| Patents Number | NA |
| Date of Issue | NA |
| Date of Expiry | NA |
| Drug Interaction | NA |
| Target | NA |
| Brand Name | Gvoke |
| Company | Xeris Pharmaceuticals, Inc. |
| Brand Description | Xeris Pharmaceuticals, Inc. |
| Prescribed For | symptoms of severe Hypoglycemia. |
| Chemical Name | C153H225N43O49S |
| Formulation | Glucagon is a single chain containing 29 amino acid residues and has a molecular weight of 3483 and is identical to human glucagon. Glucagon is produced by solid phase synthesis with subsequent purification. |
| Physical Appearance | clear, colorless to pale yellow, sterile solution |
| Route of Administration | subcutaneous injection |
| Recommended Dosage | Adults and Pediatric Patients Aged 12 and Older: The recommended dose of GVOKE is 1 mg administered by subcutaneous injection into lower abdomen, outer thigh, or outer upper arm. If there has been no response after 15 minutes, an additional 1 mg dose of GVOKE from a new device may be administered while waiting for emergency assistance. Pediatric Patients Aged 2 To Under 12 Years Of Age: The recommended dose for pediatric patients who weigh less than 45 kg is 0.5 mg GVOKE administered by subcutaneous injection into the lower abdomen, outer thigh, or outer upper arm. The recommended dose for pediatric patients who weigh 45 kg or greater is 1 mg GVOKE administered by subcutaneous injection into the lower abdomen, outer thigh, or outer upper arm. If there has been no response after 15 minutes, an additional weight appropriate dose of GVOKE from a new device may be administered while waiting for emergency assistance. |
| Contraindication | GVOKE is contraindicated in patients with: Pheochromocytoma Insulinoma because of the risk of hypoglycemia Known hypersensitivity to glucagon or to any of the excipients in GVOKE. Allergic reactions have been reported with glucagon and include anaphylactic shock with breathing difficulties and hypotension |
| Side Effects | nausea, vomiting, and swelling where the injection was given |
| Useful Link 1 | Link |
| Useful Link 2 | NA |
| Remarks | NA |