Name: | bortezomib |
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PubChem Compound ID: | 387447 |
Molecular formula: | C19H25BN4O4 |
Molecular weight: | 384.237 g/mol |
Synonyms: |
D03150; Velcade (TN); NCI60_029010; MLN-341; Bortezomib (JAN/USAN); Bortezomib; LDP-341; BO2; NSC681239; DPBA.
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Name: | bortezomib |
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Name (isomeric): | DB00188 |
Drug Type: | small molecule |
Brand: | Velcade |
Category: | Antineoplastic Agents, Protease Inhibitors |
CAS number: | 179324-69-7 |
Indication: | For treatment of multiple myeloma in patients who have not been successfully treated with at least two previous therapies. |
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Pharmacology: |
Bortezomib is a drug that inhibits the mammalian 26S proteasome. The ubiquitin-proteasome pathway plays an essential role in regulating the intracellular concentration of specific proteins, thereby maintaining homeostasis within cells. Inhibition of the 26S proteasome prevents this targeted proteolysis, which can affect multiple signaling cascades ...
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Mechanism of Action: |
Bortezomib is a reversible inhibitor of the chymotrypsin-like activity of the 26S proteasome in mammalian cells. The 26S proteasome is a large protein complex that degrades ubiquitinated proteins. The active site of the proteasome has chymotrypsin-like, trypsin-like, and postglutamyl peptide hydrolysis activity. The 26S proteasome degrades various ...
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Protein binding: | 83% over the concentration range of 100-1000 ng/ml. |
Biotransformation: | In vitro studies with human liver microsomes and human cDNA-expressed cytochrome P450 isozymes indicate that bortezomib is primarily oxidatively metabolized via cytochrome P450 enzymes 3A4, 2C19, and 1A2, while bortezomib metabolism by CYP 2D6 and 2C9 enzymes is minor. The major metabolic pathway is deboronation to form 2 deboronated metabolites that subsequently undergo hydroxylation to several metabolites which are inactive as 26S proteasome inhibitors. |
Route of elimination: | The pathways of elimination of bortezomib have not been characterized in humans. |
Half Life: | The mean elimination half-life of bortezomib after first dose ranged from 9 to 15 hours at doses ranging from 1.45 to 2.00 mg/m2 in patients with advanced malignancies. |
Clearance: | 102 L/h [patients with multiple myeloma following the first dose for doses of 1 mg/m2] 112 L/h [patients with multiple myeloma following the first dose for doses of 1.3 mg/m2] 15 - 32 L/h [patients with multiple myeloma following subsequent doses for doses of 1 and 1.3 mg/m2] |
Toxicity: | Cardiovascular safety pharmacology studies in monkeys show that lethal IV doses are associated with decreases in blood pressure, increases in heart rate, increases in contractility, and ultimately terminal hypotension. In monkeys, doses of 3.0 mg/m2 and greater (approximately twice the recommended clinical dose) resulted in progressive hypotension starting at 1 hour and progressing to death by 12 to 14 hours following drug administration. |
Affected organisms: | Humans and other mammals |
Food interaction: |
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Drug interaction: |
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