title: MDR1 RNA expression as a prognostic factor in acute myeloid leukemia: an update.
abstract: In order to confirm our initial report on the negative impact of MDR1 gene expression on the outcome of de novo acute myeloid leukemia (AML), we present an update of our prospective study with a larger number of patients and a longer duration of follow-up. At diagnosis, MDR1 RNA expression of the leukemic cells was negative in 37% and positive in 63% of the patients (N = 79). The complete remission rate of induction chemotherapy was 76% for MDR1 RNA negative and 54% for MDR1 RNA positive patients (p = 0.05). At a median observation duration of 33 months, the duration of overall survival was 19 months for the MDR1 RNA negative patients but only 8 months for the patients with MDR1 gene expression (p = 0.02). Thus the long-term data also indicate that MDR1 gene expression is an unfavourable prognostic factor in AML.
authors.affiliation: Clinic for Internal Medicine I, University of Vienna, Austria.
authors.forename: A
authors.initials: A
authors.lastname: Gsur
authors.forename: S
authors.initials: S
authors.lastname: Zöchbauer
authors.forename: M
authors.initials: M
authors.lastname: Götzl
authors.forename: P A
authors.initials: PA
authors.lastname: Kyrle
authors.forename: K
authors.initials: K
authors.lastname: Lechner
authors.forename: R
authors.initials: R
authors.lastname: Pirker
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D002352:Carrier Proteins / Q000096:biosynthesis*; D003561:Cytarabine / Q000008:administration & dosage; D003630:Daunorubicin / Q000008:administration & dosage; D004351:Drug Resistance / Q000235:genetics*; D005260:Female; D005500:Follow-Up Studies; D015870:Gene Expression; D006801:Humans; D015255:Idarubicin / Q000008:administration & dosage; D007951:Leukemia, Myeloid / Q000188:drug therapy* / Q000235:genetics / Q000401:mortality; D008297:Male; D008562:Membrane Glycoproteins / Q000096:biosynthesis*; D008875:Middle Aged; D011379:Prognosis; D012334:RNA, Neoplasm / Q000032:analysis / Q000096:biosynthesis; D012074:Remission Induction; D015996:Survival Rate; D016896:Treatment Outcome
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D002352:Carrier Proteins; D008562:Membrane Glycoproteins; D012334:RNA, Neoplasm; D003561:Cytarabine; D015255:Idarubicin; D003630:Daunorubicin