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Vincristine sulfate liposome
Pronunciation
Definition 1
A form of the anticancer drug vincristine sulfate that is contained inside very tiny, fat-like particles. It may have fewer side effects and work better than vincristine. Vincristine sulfate liposome is used to treat adults with acute lymphoblastic leukemia that is Philadelphia chromosome negative and has come back or has not gotten better with other treatment. It is also being studied in the treatment of other types of cancer. It is a type of vinca alkaloid and a type of antimitotic agent. Also called liposomal vincristine sulfate and Marqibo. (NCI Dictionary)
Definition 2
A sphingomyelin/cholesterol liposomal formulation of vincristine sulfate with potential antineoplastic activity. Vincristine, a vinca alkaloid isolated from the plant Vinca rosea, irreversibly binds to and stabilizes tubulin, thereby interrupting microtubule assembly/disassembly dynamics, thereby preventing the formation of the mitotic spindle and leading to cell cycle arrest in metaphase. Liposomal encapsulation prolongs bioavailability of vincristine, increases its delivery to tumor tissues and reduces its toxicity profile. Compared to standard liposomal delivery, sphingosomal drug delivery further increases circulation time of serum drug and enhances drug accumulation at tumor sites, thereby leading to a further increase in efficacy. (NCI Thesaurus)
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