MARINa is an algorithm that could be used to identfy transcription factors (TFs) that control the transition between two cellular phenotypes. Phenotypic changes eﬀected by pathophysiological events are captured by gene expression proﬁle measurements, determining mRNA abundance on a genome-wide scale in a cellular population. Furthermore, mRNA expression does not constitute a reliable predictor of protein activity, as it fails to capture a variety of post-transcriptional and post-translational events that are involved in its modulation. To negate this problem, MARINa computes the effect that enrichment of each regulon (i.e its activated and repressed targets) has on the differentially expressed genes between two phenotypic states.
The CTD2 Network develops new approaches to identify novel targets and functionally validate discoveries made from large-scale genomic initiatives, such as The Cancer Genome Atlas (TCGA), Therapeutically Applicable Research to Generate Effective Treatments (TARGET), and the Cancer Genome Characterization Initiative (CGCI), and advance them toward precision medicine. Through robust cross-Network collaborations, CTD2 (1) mines data to find alterations that potentially influence tumor biology, (2) characterizes the functional roles of candidate alterations in cancers, and (3) identifies novel approaches that target causative alterations either directly or indirectly. Methodologies include bioinformatics, genome-wide gain- and loss-of-function screening, and small molecule high-throughput screening, among others.
Part of the CTD2 mission is to make data and tools available and accessible to the greater research community to accelerate the discovery process. Bioinformatics support is often required for analyses of the massive datasets used and generated through experimental pipelines employed by the Network Centers. To facilitate the processes of mining, visualizing, analyzing, and using such datasets, OCG has curated this collection of analytical tools. OCG/CTD2 does not endorse any specific tool. However, this list gives researchers a gateway to access many tools that are useful for analyzing and/or visualizing large-scale genomic and/or complex datasets generated through high-throughput screens and other assays.36 Analytical Tools
MCLP Data Portal is an interactive resource of proteomic, genomic, transcriptomic, and drug screening data of a large number of cancer cell lines. Protein expression levels (proteomic) were measured using the reverse phase protein array platform. This bioinformatic resource enables researchers to explore, analyze, and visualize protein expression data of cancer cell lines through four interactive modules: My Protein, Analysis, Visualization, and Data Sets.
MethylMix is an algorithm to identify hyper and hypomethylated genes for a disease. This approach uses a novel statistic, the Differential Methylation value or DM-value, to define methylation-driven subgroups. This could be used to identify differentially and transcriptionally predictive methylated genes within a disease by comparing with the normal DNA methylation state. Matched gene expression data is used to identify, besides differential, functional methylation states by focusing on methylation changes that affect gene expression.
MEDICI is a computational method which ranks known protein-protein interactions (PPIs). This approach combines Project Achilles shRNA gene silencing data with network models of protein interaction pathways (NCI Pathway Interaction Database) in an analytic framework. The PPIs are ranked based on their essentiality for the survival and proliferation of cancer cells.
MINDy2 and CINDy both infer modulatory events in the cell. They do this by screening a list of candidate modulator proteins and assessing their effect on the transcriptional control of a transcription factor of interest. CINDy uses a more sophisticated algorithm: while both try to assess the effects of a modulator over a transcriptional network, CINDy uses the entire expression range of the modulator.
The OncoPPi Portal is a resource of cancer-relevant protein-protein interactions (PPI) that allows users to access, explore, and prioritize cancer-relevant PPIs for target discovery. The OncoPPi Portal facilitates discovery of new mechanisms to conrtol tumorigenesis through integration of genomic, pharmacological, clinical, and structural data with the network of cancer-associated PPI experimentally determined in cancer cells.
Pathway Commons is a network biology resource that serves as a convenient access point to biological pathway information collected from public pathway databases, which users can search, visualize, and download.
PiHelper integrates drug target and antibody target interactions from publicly available resources to facilitate research in systems pharmacology, perturbation biology, and proteomics. PiHelper can (1) import drug and antibody target information; (2) search the interactions; (3) visualize data interactively in a network; and (4) export interaction data for use in publications or other analysis tools.
PARIS is a flexible GenePattern module that uses a mutual information-based metric to rank data, such as shRNA/gene dependencies in cell lines, genomic features, and chemical sensitivities. This algorithm can handle both binary and continuous variables.
Project Achilles uses genome-wide pooled shRNA screens to identify and catalog genetic vulnerabilities associated with genetic or epigenetic changes across hundreds of cancer cell lines. In the Project Achilles portal, genes can be queried for essentiality across all cell lines. Data can be easily downloaded and visualized with GENE-E or the data analysis GenePattern module, PARIS.