title: [Chromosome translocations and leukemias induced by inhibitors of topoisomerase II anticarcinogenic drugs].
abstract: The treatment of cancer with alkylating drugs or topoisomerase II inhibitors can be responsible for the development of myelodysplastic syndromes and acute myelogenous leukemia. Alkylating agents such as melphalan and cisplatinum mainly produce damages at chromosomes 5 and 7 whereas topoisomerase II inhibitors-induced lesions essentially affect chromosomes 11 and 21. Rearrangements of the MLL gene at band 11q23 are frequently observed in human de novo myeloid and lymphoid leukemia as well as in leukemia or myelodysplasia secondary to therapy with drugs targetting topoisomerase II such as the epipodophyllotoxins. A relationship between the treatment with etoposide on teniposide and the development of translocations of the MLL gene has been clearly evidenced. The potential molecular basis of the chromosomal rearrangements implicating topoisomerase II and its inhibitors are discussed. The chemical structure of the inhibitors, their mechanism of action and the genes targetted by these drugs are presented. DNA cleavages induced directly by topoisomerase II inhibitors or by the drug induced apoptotic cellular response are responsible for nonrandom chromosomal aberrations and contribute to leukemogenesis.
authors.affiliation: Laboratoire de pharmacologie antitumorale, Centre Oscar-Lambret, Lille.
authors.forename: L
authors.initials: L
authors.lastname: Dassonneville
authors.forename: C
authors.initials: C
authors.lastname: Bailly
mesh_terms: D000208:Acute Disease; D000970:Antineoplastic Agents / Q000009:adverse effects* / Q000627:therapeutic use; D002869:Chromosome Aberrations; D002880:Chromosomes, Human, Pair 11 / Q000187:drug effects; D002891:Chromosomes, Human, Pair 21 / Q000187:drug effects; D004273:DNA, Neoplasm / Q000187:drug effects; D015321:Gene Rearrangement; D006801:Humans; D007951:Leukemia, Myeloid / Q000139:chemically induced* / Q000235:genetics; D009363:Neoplasm Proteins / Q000235:genetics*; D016609:Neoplasms, Second Primary / Q000139:chemically induced* / Q000235:genetics; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000139:chemically induced* / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000235:genetics; D059005:Topoisomerase II Inhibitors; D014178:Translocation, Genetic
chemical_list: D000970:Antineoplastic Agents; D004273:DNA, Neoplasm; D009363:Neoplasm Proteins; D011993:Recombinant Fusion Proteins; D059005:Topoisomerase II Inhibitors