annotationTools

annotationTools annotates and integrates heterogeneous microarray gene expression data by mining flat file molecular biology databases and identifying orthologs to support cross-species and cross-platform analyses.

Key Features:

• Annotation of Microarrays: Systematically mines flat file databases to annotate microarray probes with molecular biology information.
• Ortholog Identification and Cross-Species Analysis: Identifies orthologs across species using multiple orthology databases and maps probes from different species onto a common framework.
• Cross-Platform Data Integration: Integrates gene expression profiles from multiple microarray platforms using annotations from flat file databases to enable cross-platform comparisons.
• Exploratory Comparative Analysis: Supports comparative analysis of transcriptional changes by comparing human patient data with genetic animal model datasets to explore disease-related expression patterns.

Scientific Applications:

• Comparative Genomics: Maps orthologous genes across species to support studies of evolutionary conservation and functional inference.
• Translational Research: Enables comparison of gene expression profiles between human subjects and animal models to investigate disease mechanisms and potential targets.
• Data Validation and Reproducibility: Facilitates integration of heterogeneous datasets across microarray platforms to support validation and reproducibility of findings.

Methodology:

Mining and parsing flat file molecular biology databases to extract annotations; using multiple orthology databases to identify orthologs and map probes across species; integrating gene expression profiles across microarray platforms via extracted annotations; provided as a Bioconductor-compliant R package with specialized functions for systematic extraction and utilization of these data sources.