Gene Set: DELYS_THYROID_CANCER_DN

Standard name DELYS_THYROID_CANCER_DN
Systematic name M13273
Brief description Genes down-regulated in papillary thyroid carcinoma (PTC) compared to normal tissue.
Full description or abstract The purpose of this paper is to correlate the molecular phenotype of papillary thyroid carcinoma (PTC) to their biological pathology. We hybridized 26 PTC on microarrays and showed that nearly 44% of the transcriptome was regulated in these tumors. We then combined our data set with two published PTC microarray studies to produce a platform- and study-independent list of PTC-associated genes. We further confirmed the mRNA regulation of 15 genes from this list by quantitative reverse transcription-PCR. Analysis of this list with statistical tools led to several conclusions: (1) there is a change in cell population with an increased expression of genes involved in the immune response, reflecting lymphocyte infiltration in the tumor compared to the normal tissue. (2) The c-jun N-terminal kinase pathway is activated by overexpression of its components. (3) The activation of ERKK1/2 by genetic alterations is supplemented by activation of the epidermal growth factor but not of the insulin-like growth factor signaling pathway. (4) There is a downregulation of immediate early genes. (5) We observed an overexpression of many proteases in accordance with tumor remodeling, and suggested a probable role of S100 proteins and annexin A2 in this process. (6) Numerous overexpressed genes favor the hypothesis of a collective migration mode of tumor cells.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 17621275   Authors: Delys L,Detours V,Franc B,Thomas G,Bogdanova T,Tronko M,Libert F,Dumont JE,Maenhaut C
Exact source Table 1S
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(show 13 gene sets from the same authors)
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Organism Homo sapiens
Contributed by Aravind Subramanian (MSigDB Team)
Source platform HUMAN_GENE_SYMBOL
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Version history 3.0: First introduced

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