title: Minimally differentiated acute myeloid leukemia with t(12;22)(p13;q11) translocation showing primary multidrug resistance and expressing multiple multidrug-resistant proteins.
abstract: Here we report a rare chromosomal translocation, t(12;22)(p13;q11), which was detected in a 53-year-old female patient diagnosed as having minimally differentiated acute myeloid leukemia (AML-M0) according to the French-American-British classification criteria. Chromosome painting analysis with probes for chromosomes 12 and 22 confirmed the result of the conventional cytogenetic analysis. Reverse transcriptase polymerase chain reaction revealed the TEL-MN1 fusion transcript. Interestingly, she presented primary multidrug resistance and did not respond to several kinds of chemotherapy regimens. Moreover, she could not achieve remission after two doses of monotherapy with Mylotarg. Flow cytometry analysis detected high levels of expression of P-glycoprotein, multidrug-resistant-related protein, lung-related protein, and glutathione S-transferase pi in this case at presentation. As far as we know, this is the first report of t(12;22)(p13;q11) translocation involving TEL and MN1 genes in an AML-M0 patient.
authors.affiliation: Leukemia Research Unit, Jiangsu Institute of Hematology, First Affiliated Hospital of Soochow University, Suzhou, PR China.
authors.forename: Suning
authors.initials: S
authors.lastname: Chen
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Xue
authors.forename: Xinghu
authors.initials: X
authors.lastname: Zhu
authors.forename: Yafang
authors.initials: Y
authors.lastname: Wu
authors.forename: Jinlan
authors.initials: J
authors.lastname: Pan
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000008:administration & dosage / Q000009:adverse effects; D002881:Chromosomes, Human, Pair 12; D002892:Chromosomes, Human, Pair 22; D018450:Disease Progression; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D017809:Fatal Outcome; D005260:Female; D005434:Flow Cytometry; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000188:drug therapy* / Q000235:genetics* / Q000473:pathology; D008875:Middle Aged; D011518:Proto-Oncogene Proteins / Q000032:analysis* / Q000187:drug effects; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014178:Translocation, Genetic
chemical_list: D011518:Proto-Oncogene Proteins