Author Summary | Novel cancer gene candidates significantly overlapped with orthogonal systematic cancer screen hits, supporting the power of this approach to identify cancer genes . |
Cancer-type-specific domain mutation landscapes across 21 cancer types | Of the 94 genes encoding at least one SMD, 40 (42%) had already been implicated in cancer according to the Sanger Cancer Gene Census (‘Cancer Census’) [39, 40], including well-established cancer-caus-ing genes such as KRAS, EGFR and TP53. |
Cancer-type-specific domain mutation landscapes across 21 cancer types | We compared the resulting novel cancer gene candidates with cancer gene candidates emerging from a large-scale in vivo (mouse) screen Via mutagenesis with Sleeping Beauty trans-posons [45]. |
Cancer-type-specific domain mutation landscapes across 21 cancer types | Of the subset of 54 candidate genes not already known to be cancer genes , 10 were found in the Sleeping Beauty dataset (~ 2-fold enrichment; P-Value 2 5X 10—3, Fisher’s Exact test, Table 4). |
Cancer-type-specific positioning of mutations within a given gene | These 52 genes were enriched for evidence of involvement in cancer, with 16 being Cancer Census genes (enrichment factor ~ 11.9; P-value = 6.7 X1043, Fisher’s Exact test), and 15 being candidate cancer genes according to the Sleeping Beauty screen (enrichment factor ~ 4.5; P-value = 1.9 X10'6, Fisher’s Exact test). |
Cancer-type-specific positioning of mutations within a given gene | Domain-associated mutational biases have been reported in several studies focusing on single well-known cancer genes such as the PI3KCA gene in colon and breast cancer[32], and the NOTCH1 gene in leukemia, breast and ovarian cancer [53]. |
Cancer-type-specific positioning of mutations within a given gene | Here, we analyzed the distribution of somatic missense mutations for 14,083 genes across 21 cancer types and identified 52 genes (36 of which are not yet known to be cancer genes ) for which different domain instances may contribute to different cancer types. |
Cancer-type-specific significantly-mutated domain instance analyses | Also, genes containing at one or more SMDs were regarded as candidate cancer genes in this study. |
Discussion | By comparing the domain-level mutational landscapes of different cancers generated by our study to previously reported gene-level mutation landscapes in small cell lung cancer, melanoma, colon cancer, and breast cancer[14, 70—73] , we noticed at least ten cancer-type-spe-cif1c SMDs that do not correspond to any previously reported highly mutated cancer-associat-ed genes. |
Discussion | In addition to correspondence of the discovered SMDs to known cancer-relevant domain families, our set of novel driver gene candidates overlapped significantly with a large-scale screen for cancer genes based on transposon mutagenesis in mouse. |
CMapBatch meta-analysis strategy: From individual cancer gene signatures to candidate therapeutics | CMapBatch meta-analysis strategy: From individual cancer gene signatures to candidate therapeutics |
CMapBatch meta-analysis strategy: From individual cancer gene signatures to candidate therapeutics | Twenty-one lung cancer gene signatures (tumour vs. normal comparisons). |
Candidate drugs identified via CMapBatch are more conserved across signature subsets than candidate drugs identified from single gene signatures | For this test, we randomly assigned the 21 lung cancer gene signatures to two groups, one with 10 and the other |
Candidate therapeutics inhibit growth in nine NSCLC cell lines | We call this set of 23 drugs that transcriptionally reverse lung cancer gene changes and slow growth in lung cancer cell lines—TOP drugs (S2 Table); in subsequent sections, we prioritize significant drugs that have not been tested in NCI-6O by linking them to TOP drugs using a variety of metrics. |
Common protein targets of significant drugs | There are 4 drugs targeting PLA2G4A included in the CMap collection, and all 4 significantly reverse lung cancer gene changes in our analyses: flunisolide, fluocinonide, fluorometholone, and medrysone. |
Supporting Information | 247 significant drugs consistently reverse lung cancer gene changes in rank prod-82 Table. |
Supporting Information | The columns COSMIC, TSgene, and ncg denote Whether the gene is present in COSMIC, TSGene, or the Network of Cancer Genes respectively. |
Supporting Information | The columns COSMIC, TSgene, and ncg denote Whether the gene is present in COSMIC, TSGene, or the Network of Cancer Genes respectively. |
Supporting Information | The columns COSMIC, TSgene, and ncg denote Whether the gene is present in COSMIC, TSGene, or the Network of Cancer Genes respectively. |