Abstract: The present invention is based on methods of predicting toxicity of test agents and methods of generating toxicity prediction models using algorithms for analyzing quantitative gene expression information. The invention also includes computer systems comprising the toxicity prediction models, as well as methods of using the computer systems by remote users for determining the toxicity of test agents.

Abstract: A computer-based system and method are provided for retrieving information from a number of data sources on a computer network containing biological data. The network database is organized in a b-tree configuration having a plurality of sample nodes. Each sample node includes a curated data set of pre-formatted and pre-computed summary biological data obtained from at least one biological sample. The plurality of sample nodes are organized in a hierarchical arrangement according to clinical relevance. A set of attributes is assigned to each sample node to facilitate navigation through the database using a browser accessible through a graphical user interface. The set of attributes including at least one taxonomy designation selected from the group including tissues, diseases, medications and sample parameters. Search results that are produced include automated reports of the summary biological data stored in the sample nodes and custom reports generated using the summary biological data.