Gene Set: IIZUKA_LIVER_CANCER_EARLY_RECURRENCE

Standard name IIZUKA_LIVER_CANCER_EARLY_RECURRENCE
Systematic name M10382
Brief description Genes down-regulated in hepatocellular carcinoma (HCC) tumors with higher risk of early intrahepatic recurrence. The single up-regulated gene (GenBank Accession=AC000063) has been excluded from the signature.
Full description or abstract BACKGROUND: Hepatocellular carcinoma has a poor prognosis because of the high intrahepatic recurrence rate. There are technological limitations to traditional methods such as TNM staging for accurate prediction of recurrence, suggesting that new techniques are needed. METHODS: We investigated mRNA expression profiles in tissue specimens from a training set, comprising 33 patients with hepatocellular carcinoma, with high-density oligonucleotide microarrays representing about 6000 genes. We used this training set in a supervised learning manner to construct a predictive system, consisting of 12 genes, with the Fisher linear classifier. We then compared the predictive performance of our system with that of a predictive system with a support vector machine (SVM-based system) on a blinded set of samples from 27 newly enrolled patients. FINDINGS: Early intrahepatic recurrence within 1 year after curative surgery occurred in 12 (36%) and eight (30%) patients in the training and blinded sets, respectively. Our system correctly predicted early intrahepatic recurrence or non-recurrence in 25 (93%) of 27 samples in the blinded set and had a positive predictive value of 88% and a negative predictive value of 95%. By contrast, the SVM-based system predicted early intrahepatic recurrence or non-recurrence correctly in only 16 (60%) individuals in the blinded set, and the result yielded a positive predictive value of only 38% and a negative predictive value of 79%. INTERPRETATION: Our system predicted early intrahepatic recurrence or non-recurrence for patients with hepatocellular carcinoma much more accurately than the SVM-based system, suggesting that our system could serve as a new method for characterising the metastatic potential of hepatocellular carcinoma.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 12648972   Authors: Iizuka N,Oka M,Yamada-Okabe H,Nishida M,Maeda Y,Mori N,Takao T,Tamesa T,Tangoku A,Tabuchi H,Hamada K,Nakayama H,Ishitsuka H,Miyamoto T,Hirabayashi A,Uchimura S,Hamamoto Y
Exact source Fig 3B: green in Group A
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Organism Homo sapiens
Contributed by Yujin Hoshida (Broad Institute)
Source platform AFFY_HuGene
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Version history 3.1: IIZUKA_RECURRENT_LIVER_CANCER

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