Multidrug resistance (MDR) gene expression in acute non lymphoblastic leukemia: sequential analysis.
Sequential evaluation of P-glycoprotein expression was performed in 29 patients with acute nonlymphoblastic leukemia using immunocytochemistry with the C219 antibody. At diagnosis, 32% of the patients exhibited more than 5% of the P-gp(+) leukemic cells. Under chemotherapy, 62% of the patients eventually expressed a subset of P-gp positive leukemic cells. After conventional doses of cytosine-arabinoside (Ara-C) and daunorubicin or mitoxantrone, positive P-gp cells were noted in 65% of the cases. This percentage was significantly higher (p = 0.002) than the proportion of positive cases (15%) observed after regimens containing either intermediate doses of Ara-C or cyclosporine A, a P-gp modulator.
Marie
J P
JP
Laboratoire de Cinétique et de Cultures Cellulaires, Service d'Hématologie, Hôtel-Dieu, Paris, France.
Legrand
O
O
Russo
D
D
Zhou
D
D
Suberville
A M
AM
Zittoun
R
R
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000328:Adult; D000368:Aged; D000677:Amsacrine / Q000008:administration & dosage; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003561:Cytarabine / Q000008:administration & dosage; D003630:Daunorubicin / Q000008:administration & dosage; D005260:Female; D005500:Follow-Up Studies; D015973:Gene Expression Regulation, Leukemic; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000188:drug therapy / Q000235:genetics*; D008297:Male; D008562:Membrane Glycoproteins / Q000096:biosynthesis* / Q000235:genetics; D008875:Middle Aged; D008942:Mitoxantrone / Q000008:administration & dosage; D009363:Neoplasm Proteins / Q000096:biosynthesis* / Q000235:genetics; D012074:Remission Induction
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D008562:Membrane Glycoproteins; D009363:Neoplasm Proteins; D000677:Amsacrine; D003561:Cytarabine; D008942:Mitoxantrone; D003630:Daunorubicin