Gene Set: BOYERINAS_ONCOFETAL_TARGETS_OF_LET7A1

Standard name BOYERINAS_ONCOFETAL_TARGETS_OF_LET7A1
Systematic name M9626
Brief description Embryonic genes targeted by LET7A1 [GeneID=406881] and which are up-regulated in many human cancers.
Full description or abstract MicroRNAs (miRNA) are small RNA molecules of approximately 20 to 22 nucleotides that reduce expression of proteins through mRNA degradation and/or translational silencing. Each known miRNA has a large number of predicted targets. Members of the let-7/miR-98 family of miRNAs are up-regulated at the end of embryonic development. Let-7 is often down-regulated early during cancer development, suggesting that let-7-regulated oncofetal genes (LOG) may become reexpressed in cancer cells. Using comparative bioinformatics, we have identified 12 conserved LOGs that include HMGA2 and IMP-1/CRD-BP. IMP-1 has growth-promoting activities through stabilization of c-myc mRNA. We experimentally confirmed that IMP-1 is a direct let-7 target that promotes cell growth and motility of tumor cells, and we confirmed by proteomics analysis that IMP-1 and HMGA2 are major miRNA targets. Our data suggest that a substantial part of the growth inhibitory activities of let-7 comes from suppressing the expression of IMP-1. LOGs could be novel therapeutic targets and potential biomarkers for cancer treatment.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 18413726   Authors: Boyerinas B,Park SM,Shomron N,Hedegaard MM,Vinther J,Andersen JS,Feig C,Xu J,Burge CB,Peter ME
Exact source Fig. 1B
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Organism Homo sapiens
Contributed by Jessica Robertson (MSigDB Team)
Source platform HUMAN_GENE_SYMBOL
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