Analysis Overview
Pancreatic Adenocarcinoma (Primary solid tumor)
15 January 2014 | analyses__2014_01_15
Maintainer Information
Citation Information
doi:10.7908/C1ZG6QPH
Maintained by TCGA GDAC Team (Broad Institute/MD Anderson Cancer Center/Harvard Medical School)
Cite as Broad Institute TCGA Genome Data Analysis Center (2014): Analysis Overview for Pancreatic Adenocarcinoma (Primary solid tumor cohort) - 15 January 2014. Broad Institute of MIT and Harvard. doi:10.7908/C1ZG6QPH
Overview
Introduction

This is an overview of Pancreatic Adenocarcinoma analysis pipelines from Firehose run "15 January 2014".

Summary

Note: These results are offered to the community as an additional reference point, enabling a wide range of cancer biologists, clinical investigators, and genome and computational scientists to easily incorporate TCGA into the backdrop of ongoing research. While every effort is made to ensure that Firehose input data and algorithms are of the highest possible quality, these analyses have not been reviewed by domain experts.

Results

- Sequence and Copy Number Analyses

- CHASM 1.0.5 (Cancer-Specific High-throughput Annotation of Somatic Mutations)
  View Report | There are 28104 mutations identified by MuTect and 1222 mutations with significant functional impact at BHFDR <= 0.25.

- Mutation Analysis (MutSig v1.5)
  View Report |

- Mutation Analysis (MutSig v2.0 and MutSigCV v0.9 merged result)
  View Report |

- Mutation Analysis (MutSig v2.0)
  View Report |

- Mutation Analysis (MutSigCV v0.9)
  View Report |

- Mutation Assessor
  View Report |

- SNP6 Copy number analysis (GISTIC2)
  View Report | There were 81 tumor samples used in this analysis: 15 significant arm-level results, 20 significant focal amplifications, and 26 significant focal deletions were found.

- Correlations to Clinical Parameters

- Correlation between aggregated molecular cancer subtypes and selected clinical features
  View Report | Testing the association between subtypes identified by 8 different clustering approaches and 12 clinical features across 58 patients, no significant finding detected with P value < 0.05 and Q value < 0.25.

- Correlation between copy number variation genes (focal events) and selected clinical features
  View Report | Testing the association between copy number variation 46 focal events and 12 clinical features across 57 patients, no significant finding detected with Q value < 0.25.

- Correlation between copy number variations of arm-level result and selected clinical features
  View Report | Testing the association between copy number variation 61 arm-level events and 12 clinical features across 57 patients, 5 significant findings detected with Q value < 0.25.

- Correlation between gene methylation status and clinical features
  View Report | Testing the association between 20441 genes and 12 clinical features across 58 samples, statistically thresholded by Q value < 0.05, 6 clinical features related to at least one genes.

- Correlation between gene mutation status and selected clinical features
  View Report | Testing the association between mutation status of 102 genes and 12 clinical features across 44 patients, 5 significant findings detected with Q value < 0.25.

- Correlation between miRseq expression and clinical features
  View Report | Testing the association between 518 miRs and 12 clinical features across 53 samples, statistically thresholded by Q value < 0.05, 2 clinical features related to at least one miRs.

- Correlation between mRNAseq expression and clinical features
  View Report | Testing the association between 18507 genes and 12 clinical features across 50 samples, statistically thresholded by Q value < 0.05, 4 clinical features related to at least one genes.

- Clustering Analyses

- Clustering of copy number data by focal peak region with log2 ratio: consensus NMF
  View Report | The most robust consensus NMF clustering of 81 samples using the 49 copy number focal regions was identified for k = 3 clusters. We computed the clustering for k = 2 to k = 8 and used the cophenetic correlation coefficient to determine the best solution.

- Clustering of copy number data by peak region with threshold value: consensus NMF
  View Report | The most robust consensus NMF clustering of 81 samples using the 49 copy number focal regions was identified for k = 3 clusters. We computed the clustering for k = 2 to k = 8 and used the cophenetic correlation coefficient to determine the best solution.

- Clustering of Methylation: consensus NMF
  View Report | The 1247 most variable methylated genes were selected based on variation. The variation cutoff are set for each tumor type empirically by fitting a bimodal distriution. For genes with multiple methylation probes, we chose the most variable one to represent the gene. Consensus NMF clustering of 91 samples and 1247 genes identified 3 subtypes with the stability of the clustering increasing for k = 2 to k = 8 and the average silhouette width calculation for selecting the robust clusters.

- Clustering of miRseq mature expression: consensus hierarchical
  View Report | We filtered the data to 229 most variable miRs. Consensus average linkage hierarchical clustering of 59 samples and 229 miRs identified 3 subtypes with the stability of the clustering increasing for k = 2 to k = 8 and the average silhouette width calculation for selecting the robust clusters.

- Clustering of miRseq mature expression: consensus NMF
  View Report | We filtered the data to 229 most variable miRs. Consensus NMF clustering of 59 samples and 229 miRs identified 3 subtypes with the stability of the clustering increasing for k = 2 to k = 8 and the average silhouette width calculation for selecting the robust clusters.

- Clustering of miRseq precursor expression: consensus hierarchical
  View Report | We filtered the data to 150 most variable miRs. Consensus average linkage hierarchical clustering of 59 samples and 150 miRs identified 3 subtypes with the stability of the clustering increasing for k = 2 to k = 8 and the average silhouette width calculation for selecting the robust clusters.

- Clustering of miRseq precursor expression: consensus NMF
  View Report | We filtered the data to 150 most variable miRs. Consensus NMF clustering of 59 samples and 150 miRs identified 3 subtypes with the stability of the clustering increasing for k = 2 to k = 8 and the average silhouette width calculation for selecting the robust clusters.

- Clustering of mRNAseq gene expression: consensus hierarchical
  View Report | The 1500 most variable genes were selected. Consensus average linkage hierarchical clustering of 56 samples and 1500 genes identified 3 subtypes with the stability of the clustering increasing for k = 2 to k = 8 and the average silhouette width calculation for selecting the robust clusters.

- Clustering of mRNAseq gene expression: consensus NMF
  View Report | The most robust consensus NMF clustering of 56 samples using the 1500 most variable genes was identified for k = 4 clusters. We computed the clustering for k = 2 to k = 8 and used the cophenetic correlation coefficient to determine the best solution.

- Pathway Analyses

- HotNet pathway analysis of mutation and copy number data
  View Report | There were 75 significant subnetworks identified in HotNet analysis.

- PARADIGM pathway analysis of mRNASeq expression and copy number data
  View Report | There were 39 significant pathways identified in this analysis.

- PARADIGM pathway analysis of mRNASeq expression data
  View Report | There were 39 significant pathways identified in this analysis.

- Other Correlation Analyses

- Correlation between copy number variation genes (focal events) and molecular subtypes
  View Report | Testing the association between copy number variation 40 focal events and 8 molecular subtypes across 81 patients, 59 significant findings detected with P value < 0.05 and Q value < 0.25.

- Correlation between copy number variations of arm-level result and molecular subtypes
  View Report | Testing the association between copy number variation 68 arm-level events and 8 molecular subtypes across 81 patients, 29 significant findings detected with P value < 0.05 and Q value < 0.25.

- Correlation between gene mutation status and molecular subtypes
  View Report | Testing the association between mutation status of 106 genes and 8 molecular subtypes across 57 patients, no significant finding detected with P value < 0.05 and Q value < 0.25.

- Correlation between mRNA expression and DNA methylation
  View Report | The top 25 correlated methylation probes per gene are displayed. Total number of matched samples = 56. Number of gene expression samples = 56. Number of methylation samples = 91.

- Correlations between copy number and mRNAseq expression
  View Report | The correlation coefficients in 10, 20, 30, 40, 50, 60, 70, 80, 90 percentiles are 891.3, 2152, 2845, 3462, 4051, 4620, 5232.1, 5910, 6750, respectively.

Methods & Data
Input

- Summary Report Date = Fri Feb 28 12:46:23 2014

- Protection = FALSE

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