Unknown,Transcriptomics,Genomics,Proteomics

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RNA-seq analysis between mouse UPS tumors (KP) and mouse UPS tumors without HIF-2alpha (KPH2)

ABSTRACT: Purpose: determine RNA expression differences in an unbiased fashion between UPS tumors derived from LSL-KrasG12D;Trp53-/- (KP) mice, and UPS tumors derived from LSL-KrasG12D;Trp53-/-;Epas1-/- (KPH2) mice. Epas1 encodes HIF-2alpha protein. RNA-seq was performed on KP (n = 4) and KPH2 (n = 4) derived UPS tumors using Illumina HiSeq 2000.

ORGANISM(S): Mus musculus

SUBMITTER: M. Celeste Simon

PROVIDER: E-GEOD-67672 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Although mutations in Kras are present in 21% of lung tumors, there is a high level of heterogeneity in phenotype and outcomes amongst lung cancer patients suggesting the importance of other pathways. Wnt/β-catenin signaling is a known oncogenic pathway that plays a well defined role in colon and skin cancer but its role in lung cancer remains unclear. We show that activation of Wnt/β-catenin in the bronchiolar epithelium of the adult lung does not promote tumor development by itself. However, activation of Wnt/β- catenin signaling leads to a dramatic increase in tumor formation both in overall tumor number and size compared to KrasG12D alone. We show that activation of Wnt/β- catenin signaling significantly alters the KrasG12D tumor phenotype resulting in a phenotypic switch from bronchiolar epithelium to the highly proliferative distal progenitors found in the embryonic lung. This is associated with a decrease in E- cadherin expression at the cell surface which may increase metastasis in Wnt/β-catenin signaling positive tumors. Together, these data suggest that activation of Wnt/β-catenin signaling in combination with other oncogenic pathways in lung epithelium may lead to a more aggressive phenotype due to the imposition of an embryonic distal progenitor phenotype accompanied by decreased E-cadherin expression. We performed microarray analysis of control murine lung, CC10-cre:KrasG12D, and CC10-cre:Ctnnb1ex3flox:LSL-KrasG12D double mutant micro-dissected murine lung tumors to determine their transcriptional phenotype. Lungs of five-month-old mice were PBS inflated and all the tumors in each lobe were dissected. The total number of tumors obtained from three out of the 5 pulmonar lobes of each animal was called a sample the other two lobes were saved in case there were problems and the array needed to be repeated. Trizol was used to isolate RNA for microarray analysis. Samples & Genotypes: control murine lung n=2 animals, CC10-cre:KrasG12D n=2 animals, and CC10-cre:Ctnnb1ex3flox:LSL-KrasG12D n=2 animals.

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RNA-seq analysis between mouse UPS tumors (KP) and mouse UPS tumors without HIF-2alpha (KPH2)

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