MLL translocations specify a distinct gene expression profile that distinguishes a unique leukemia - PubMed (original) (raw)
Comparative Study
doi: 10.1038/ng765. Epub 2001 Dec 3.
Affiliations
- PMID: 11731795
- DOI: 10.1038/ng765
Comparative Study
MLL translocations specify a distinct gene expression profile that distinguishes a unique leukemia
Scott A Armstrong et al. Nat Genet. 2002 Jan.
Abstract
Acute lymphoblastic leukemias carrying a chromosomal translocation involving the mixed-lineage leukemia gene (MLL, ALL1, HRX) have a particularly poor prognosis. Here we show that they have a characteristic, highly distinct gene expression profile that is consistent with an early hematopoietic progenitor expressing select multilineage markers and individual HOX genes. Clustering algorithms reveal that lymphoblastic leukemias with MLL translocations can clearly be separated from conventional acute lymphoblastic and acute myelogenous leukemias. We propose that they constitute a distinct disease, denoted here as MLL, and show that the differences in gene expression are robust enough to classify leukemias correctly as MLL, acute lymphoblastic leukemia or acute myelogenous leukemia. Establishing that MLL is a unique entity is critical, as it mandates the examination of selectively expressed genes for urgently needed molecular targets.
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