Association of mutation, copy number alteration, and subtype markers with pathways
Brain Lower Grade Glioma (Primary solid tumor)
23 May 2013  |  analyses__2013_05_23
Maintainer Information
Citation Information
Maintained by Spring Yingchun Liu (Broad Institute)
Cite as Broad Institute TCGA Genome Data Analysis Center (2013): Association of mutation, copy number alteration, and subtype markers with pathways. Broad Institute of MIT and Harvard. doi:10.7908/C13776RD
Overview
Introduction

This pipeline maps genes, with mutation or copy number alteration AND this alteration is highly correlated with mRNA expression, to pathways curated in the KEGG and BIOCARTA databases. It identifies pathways significantly enriched with these genes. The pipeline also identifies pathways significantly enriched with marker genes of each expression subtype of cancer.

genes with mutation: identified by the Mutation_Significance pipeline

genes with copy number alteration: identified by the CopyNumber_Gistic2 pipeline

correlation between copy number and mRNA expression: identified by the Correlate_CopyNumber_vs_mRNA pipeline

marker genes and expression subtypes: identified by the mRNAConsensusClustering pipeline

Summary

There are 16 genes with significant mutation (Q value <= 0.1) and 466 genes with significant copy number alteration (Q value <= 0.25). The identified marker genes (Q value <= 0.01 or within top 2000) are 713 for subtype 1, 713 for subtype 2, 713 for subtype 3. Pathways significantly enriched with these genes (Q value <= 0.01) are identified :

11 pathways significantly enriched with genes with copy number alteration or mutation.

0 pathways significantly enriched with marker genes of gene expression subtype 1

0 pathways significantly enriched with marker genes of gene expression subtype 2

0 pathways significantly enriched with marker genes of gene expression subtype 3

Results
The top five pathways enriched with genes with copy number alteration or mutation

Table 1.  Get Full Table Top Pathways enriched with genes with copy number alteration or mutation. Nof Genes : No. of genes in this pathway. Nof CNV_Mut : No. of genes with copy number alteration or mutation in this pathway. Enrichment , P value and Q value : See Methods & Data below. CNV_Mut Genes in Pathway: genes with copy number alteration or mutation in this pathway.

Pathway Nof Genes Nof CNV_Mut Enrichment P value Q value
KEGG_ENDOMETRIAL_CANCER 52 9 2.9 0 0.0008
BIOCARTA_MTOR_PATHWAY 23 6 3.5 0 0.0017
BIOCARTA_PTEN_PATHWAY 18 5 3.6 0 0.0035
BIOCARTA_TEL_PATHWAY 18 5 3.6 0 0.0035
BIOCARTA_IGF1MTOR_PATHWAY 20 5 3.4 0.0001 0.0049
List of CNV_Mut genes in this pathway

HRAS,FOXO3,PTEN,ILK,PIK3CA,PIK3CD,TP53,KRAS,PIK3R1

List of CNV_Mut genes in this pathway

PTEN,EIF4G2,EIF6,PPP2CA,PIK3CA,PIK3R1

List of CNV_Mut genes in this pathway

FOXO3,PTEN,ILK,PIK3CA,PIK3R1

List of CNV_Mut genes in this pathway

XRCC6,TP53,KRAS,PPP2CA,PTEN

List of CNV_Mut genes in this pathway

PTEN,EIF2S1,PPP2CA,PIK3CA,PIK3R1

The top five pathways enriched with marker genes of gene expression subtype 1

Table 2.  Get Full Table Top Pathways enriched with marker genes of gene expression subtype 1 . Nof Genes : No. of genes in this pathway. Nof Marker : No. of marker genes of gene expression subtype 1 in this pathway. Enrichment , P value and Q value : See Methods & Data below. Marker Gene in Pathway: markers of gene expression subtype 1 in this pathway

Pathway Nof Genes Nof Marker Enrichment P value Q value
KEGG_B_CELL_RECEPTOR_SIGNALING_PATHWAY 75 10 2.1 0.0001 0.033
BIOCARTA_LAIR_PATHWAY 17 4 2.9 0.0015 0.14
KEGG_VALINE_LEUCINE_AND_ISOLEUCINE_DEGRADATION 44 6 2.2 0.0019 0.14
KEGG_GLYCOSAMINOGLYCAN_BIOSYNTHESIS_HEPARAN_SULFATE 26 5 2.6 0.0011 0.14
KEGG_CHEMOKINE_SIGNALING_PATHWAY 190 14 1.2 0.002 0.14
List of marker genes for gene expression subtype 1 in this pathway

BTK,SYK,PIK3CG,BCL10,PIK3CD,CARD11,NFKBIB,NFATC1,BLNK,VAV1

List of marker genes for gene expression subtype 1 in this pathway

C3,VCAM1,SELPLG,IL1A

List of marker genes for gene expression subtype 1 in this pathway

HADHA,HMGCL,BCKDHA,ACADM,DBT,PCCB

List of marker genes for gene expression subtype 1 in this pathway

NDST3,B3GALT6,EXTL2,HS2ST1,HS6ST1

List of marker genes for gene expression subtype 1 in this pathway

ADCY2,PIK3CG,PIK3CD,CX3CR1,GNAI3,NFKBIB,VAV1,CDC42,SHC3,PLCB2,PRKCD,GNB1,CCR1,GSK3A

The top five pathways enriched with marker genes of gene expression subtype 2

Table 3.  Get Full Table Top Pathways enriched with marker genes of gene expression subtype 2 . Nof Genes : No. of genes in this pathway. Nof Marker : No. of marker genes of gene expression subtype 2 in this pathway. Enrichment , P value and Q value : See Methods & Data below. Marker Gene in Pathway: markers of gene expression subtype 2 in this pathway

Pathway Nof Genes Nof Marker Enrichment P value Q value
KEGG_CALCIUM_SIGNALING_PATHWAY 178 8 2.5 0.0001 0.015
KEGG_NEUROACTIVE_LIGAND_RECEPTOR_INTERACTION 272 10 2.2 0.0001 0.015
BIOCARTA_PGC1A_PATHWAY 24 2 3.4 0.014 0.93
BIOCARTA_CREB_PATHWAY 27 2 3.2 0.02 0.93
KEGG_CARDIAC_MUSCLE_CONTRACTION 78 3 2.4 0.019 0.93
List of marker genes for gene expression subtype 2 in this pathway

ADRA1B,CACNA1A,HTR5A,CCKBR,PRKCB,CHRM3,CHRM2,CAMK2B

List of marker genes for gene expression subtype 2 in this pathway

HTR5A,CCKBR,OPRK1,GABRA2,GABRA1,ADRA1B,CHRM3,CHRM2,PRSS1,PRSS3

List of marker genes for gene expression subtype 2 in this pathway

CAMK1G,CAMK2B

List of marker genes for gene expression subtype 2 in this pathway

CAMK2B,PRKCB

List of marker genes for gene expression subtype 2 in this pathway

SLC9A6,CACNG3,CACNA2D3

The top five pathways enriched with marker genes of gene expression subtype 3

Table 4.  Get Full Table Top Pathways enriched with marker genes of gene expression subtype 3 . Nof Genes : No. of genes in this pathway. Nof Marker : No. of marker genes of gene expression subtype 3 in this pathway. Enrichment , P value and Q value : See Methods & Data below. Marker Gene in Pathway: markers of gene expression subtype 3 in this pathway

Pathway Nof Genes Nof Marker Enrichment P value Q value
BIOCARTA_DC_PATHWAY 22 3 4.3 0.0004 0.08
KEGG_FC_GAMMA_R_MEDIATED_PHAGOCYTOSIS 97 5 2.9 0.0005 0.08
BIOCARTA_CTCF_PATHWAY 23 2 3.7 0.01 0.39
BIOCARTA_IL2_PATHWAY 22 2 3.8 0.0095 0.39
BIOCARTA_NKCELLS_PATHWAY 20 2 3.9 0.0079 0.39
List of marker genes for gene expression subtype 3 in this pathway

TLR4,TLR7,CD33

List of marker genes for gene expression subtype 3 in this pathway

SYK,ASAP3,DOCK2,VAV1,PIKFYVE

List of marker genes for gene expression subtype 3 in this pathway

PTEN,TGFB1

List of marker genes for gene expression subtype 3 in this pathway

STAT5A,SYK

List of marker genes for gene expression subtype 3 in this pathway

VAV1,SYK

Methods & Data
Enrichment

Let genes with copy number alteration or mutation be query genes. Let marker genes of specific identified subtypes be query genes. The Enrichment is calculated as:

  • Enrichment = log2 (# of query genes in the pathway/# No of query genes) - log2 (# of genes in the pathway/# of human genes)

P value

The statistical signficance of the pathways that are enriched with genes with copy number alteration or mutation, and the pathways that are enriched with markers genes of specific identified subtypes is measured by P value.

  • P value = Fisher exact P value

Q value

The Q value is for adjusting P value for multiple testing. A public available R package is used to calculate the Q value.

Download Results

This is an experimental feature. The full results of the analysis summarized in this report can be downloaded from the TCGA Data Coordination Center.

References
[1] Qi Zheng, GOEAST: a web-based software toolkit for Gene Ontology enrichment analysis, Nucleic Acids Res. 36(issue suppl 2):W358-W363 (2008)