Increased expression of multidrug resistance gene (MDR1) at relapse in a child with acute lymphoblastic leukemia.

Abstract:

:Modern treatment protocols lead to complete remission in a high proportion of patients with childhood acute lymphoblastic leukemia (ALL). However, a large number of them show a relapse of the disease. Treatment failure in these patients is mainly attributable to de novo or acquired resistance to a wide variety of cytotoxic drugs, which is called multi drug resistance (MDR). Expression of multi drug resistance 1 gene (MDR1) is implicated in the drug-resistance mechanism. In order to contribute further information we present a rare case of a 15-month old girl with newly diagnosed CALLA positive pre-B acute lymphoblastic leukemia with favourable prognostic factors at diagnosis who experienced a relapse of the disease. Using reverse transcriptase polymerase chain reaction method, m-RNA expression of the MDR1 gene upon relapse, was five-fold compared with that at diagnosis. This is the first report on increased mRNA expression at relapse in a paired sample of a child with ALL in our region.

journal_name

Pediatr Hematol Oncol

authors

Kourti M,Vavatsi N,Gombakis N,Tzimagiorgis G,Sidi V,Koliouskas D,Athanassiadou F

doi

10.1080/08880010600719303

subject

Has Abstract

pub_date

2006-09-01 00:00:00

pages

489-94

issue

6

eissn

0888-0018

issn

1521-0669

pii

NH4775688T34J614

journal_volume

23

pub_type

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