Gene Set: JI_METASTASIS_REPRESSED_BY_STK11

Standard name JI_METASTASIS_REPRESSED_BY_STK11
Systematic name M18843
Brief description Adenocarcinoma metastatic program genes up-regulated in A549 and H2126 cells (lung cancer) lacking functional STK11 [GeneID=6794] but down-regulated by the normal gene.
Full description or abstract Germline mutation in serine/threonine kinase 11 (STK11, also called LKB1) results in Peutz-Jeghers syndrome, characterized by intestinal hamartomas and increased incidence of epithelial cancers. Although uncommon in most sporadic cancers, inactivating somatic mutations of LKB1 have been reported in primary human lung adenocarcinomas and derivative cell lines. Here we used a somatically activatable mutant Kras-driven model of mouse lung cancer to compare the role of Lkb1 to other tumour suppressors in lung cancer. Although Kras mutation cooperated with loss of p53 or Ink4a/Arf (also known as Cdkn2a) in this system, the strongest cooperation was seen with homozygous inactivation of Lkb1. Lkb1-deficient tumours demonstrated shorter latency, an expanded histological spectrum (adeno-, squamous and large-cell carcinoma) and more frequent metastasis compared to tumours lacking p53 or Ink4a/Arf. Pulmonary tumorigenesis was also accelerated by hemizygous inactivation of Lkb1. Consistent with these findings, inactivation of LKB1 was found in 34% and 19% of 144 analysed human lung adenocarcinomas and squamous cell carcinomas, respectively. Expression profiling in human lung cancer cell lines and mouse lung tumours identified a variety of metastasis-promoting genes, such as NEDD9, VEGFC and CD24, as targets of LKB1 repression in lung cancer. These studies establish LKB1 as a critical barrier to pulmonary tumorigenesis, controlling initiation, differentiation and metastasis.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 17676035   Authors: Ji H,Ramsey MR,Hayes DN,Fan C,McNamara K,Kozlowski P,Torrice C,Wu MC,Shimamura T,Perera SA,Liang MC,Cai D,Naumov GN,Bao L,Contreras CM,Li D,Chen L,Krishnamurthy J,Koivunen J,Chirieac LR,Padera RF,Bronson RT,Lindeman NI,Christiani DC,Lin X,Shapiro GI,Jšnne PA,Johnson BE,Meyerson M,Kwiatkowski DJ,Castrillon DH,Bardeesy N,Sharpless NE,Wong KK
Exact source Fig 8S
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Organism Homo sapiens
Contributed by Jessica Robertson (MSigDB Team)
Source platform HUMAN_GENE_SYMBOL
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Version history 3.0: First introduced

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