Characterization of Acute Myeloid Leukemia with Mll Rearrangements- No Increase in Incidence of Coexpression of Lymphoid- Associated Antigens on Leukemic Blasts
Resource
LEUKEMIA v.14 n.6 pp.1025-1030
Journal
LEUKEMIA
Journal Volume
v.14
Journal Issue
n.6
Pages
1025-1030
Date Issued
2000
Date
2000
Author(s)
TIEN, HWEI-FANG
Abstract
MLL gene rearrangements are associated with coexpression of myeloid- and lymphoid-associated antigens on leukemic blasts and a dismal outcome in acute lymphoblastic leukemia (ALL). Whether the same conditions can apply to acute myeloid leukemia (AML) is not quite clear. Rearrangements of the MLL gene were analyzed on 113 patients with newly diagnosed de novo AML in a single institution. Sixteen (14%) of them showed rearranged bands by Southern blot analysis, including three (50%) of six Infants, three (14%) of 21 children between 1 and 15 years and 10(12%) of 86 adults. MLL rearrangements were not only detected in M5 (four of 12 patients, 33%) and M4 (six of 31, 19%) subtypes but also in other non-M4-M5 AML (six of 70, 9%), including M1, M2 and M7 , but not M3 subtype. Seven patients had chromosomal abnormalities involving 11q23, but nine did not. The latter comprised three (6%) of 48 patients with normal karyotype, one with t(8;21 ), none with t(15;17), inv(16) or t(9;22), and four (15%) of 27 with cytogenetic aberrations other than those specific structural abnormalities . In contrast to ALL , AML patients with MLL rearrangements did not tend to coexpress lymphoid- and myeloid-associated antigens simultaneously on leukemic blasts and have similar outcome as those without the gene rearrangements.
Subjects
MLL
acute myeloid leukemia
lymphoid antigen
ACUTE LYMPHOBLASTIC-LEUKEMIA
11Q23 CHROMOSOMAL TRANSLOCATIONS
BREAKPOINT CLUSTER REGION
Type
journal article