ThETA: Transcriptome-driven Efficacy estimates for gene-based TArget discovery.

SUMMARY: Estimating efficacy of gene target-disease associations is a fundamental step in drug discovery. An important data source for this laborious task is RNA expression, which can provide gene-disease associations on the basis of expression fold change and statistical significance. However, the simply use of the log fold change can lead to numerous false positive associations. On the other hand, more sophisticated methods that utilize gene co-expression networks do not consider tissue specificity. Here we introduce ThETA (Transcriptome-driven Efficacy estimates for gene-based TArget discovery), an R package that enables non-expert users to use novel efficacy scoring methods for drug target discovery. In particular, ThETA allows users to search for gene perturbation (therapeutics) that reverse disease gene expression and genes that are closely related to disease-genes in tissue-specific networks. ThETA also provides functions to integrate efficacy evaluations obtained with different approaches and to build an overall efficacy score, which can be used to identify and prioritize gene(target)-disease associations. Finally, ThETA implements visualizations to show tissue-specific interconnections between target and disease genes, and to indicate biological annotations associated with the top selected genes. AVAILABILITY AND IMPLEMENTATION: ThETA is freely available for academic use at https://github.com/vittoriofortino84/ThETA. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online.