Arsenic trioxide

Pronunciation

Definition 1

A drug used to treat acute promyelocytic leukemia (APL) that has not gotten better or that has come back after treatment with other anticancer drugs. It is also being studied in the treatment of other types of cancer. Also called Trisenox. (NCI Dictionary)

Definition 2

A small-molecule arsenic compound with antineoplastic activity. The mechanism of action of arsenic trioxide is not completely understood. This agent causes damage to or degradation of the promyelocytic leukemia protein/retinoic acid receptor-alpha (PML/RARa) fusion protein; induces apoptosis in acute promyelocytic leukemia (APL) cells and in many other tumor cell types; promotes cell differentiation and suppresses cell proliferation in many different tumor cell types; and is pro-angiogenic. (NCI Thesaurus)

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