Human Gene Set: FERRANDO_TAL1_NEIGHBORS


Standard name FERRANDO_TAL1_NEIGHBORS
Systematic name M1007
Brief description Nearest neighbors of TAL1 [GeneID=6886], based on the close agreement of their expression profiles with that of TAL1 in pediatric T cell acute lymphoblastic leukemia (T-ALL)
Full description or abstract Human T cell leukemias can arise from oncogenes activated by specific chromosomal translocations involving the T cell receptor genes. Here we show that five different T cell oncogenes (HOX11, TAL1, LYL1, LMO1, and LMO2) are often aberrantly expressed in the absence of chromosomal abnormalities. Using oligonucleotide microarrays, we identified several gene expression signatures that were indicative of leukemic arrest at specific stages of normal thymocyte development: LYL1+ signature (pro-T), HOX11+ (early cortical thymocyte), and TAL1+ (late cortical thymocyte). Hierarchical clustering analysis of gene expression signatures grouped samples according to their shared oncogenic pathways and identified HOX11L2 activation as a novel event in T cell leukemogenesis. These findings have clinical importance, since HOX11 activation is significantly associated with a favorable prognosis, while expression of TAL1, LYL1, or, surprisingly, HOX11L2 confers a much worse response to treatment. Our results illustrate the power of gene expression profiles to elucidate transformation pathways relevant to human leukemia.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 12086890   Authors: Ferrando AA,Neuberg DS,Staunton J,Loh ML,Huard C,Raimondi SC,Behm FG,Pui CH,Downing JR,Gilliland DG,Lander ES,Golub TR,Look AT
Exact source Fig 2: the TAL1+ panel
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Source species Homo sapiens
Contributed by Jean Junior (MSigDB Team)
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identifier namespace		 AFFY_HuGene
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Version history 3.0: Renamed from FERRANDO_TAL1_NEIGHBORS

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