4DXpress

4DXpress integrates and enables comparative analysis of gene expression patterns across zebrafish, Drosophila, medaka, and mouse using anatomy ontology–based annotations and cross-species orthologue mapping.

Key Features:

• Cross-Species Expression Repository: Consolidates gene expression datasets from zebrafish, Drosophila, medaka, and mouse into a unified resource.
• Experimental Expression Data Integration: Incorporates gene expression information derived from whole mount in situ hybridization, antibody-based assays, and transgenic experiments.
• Anatomy Ontology-Based Annotation: Enables queries of gene expression patterns using anatomy ontology annotations associated with anatomical structures and developmental stages.
• Orthologue Mapping: Links genes to orthologues across species to support comparative genomics analyses.
• ArrayExpress Data Integration: Connects gene entries to publicly available microarray datasets in ArrayExpress.
• Developmental Stage Mapping: Aligns developmental stages across species to facilitate cross-species comparison of gene expression dynamics.
• Large-Scale Expression Dataset: Contains annotated expression patterns for 16,505 genes across the supported model organisms.

Scientific Applications:

• Developmental Gene Expression Analysis: Investigates spatial and temporal gene expression patterns during organismal development.
• Comparative Genomics Studies: Examines conservation and divergence of gene expression patterns among model organisms.
• Gene Function and Regulatory Network Analysis: Analyzes large-scale expression datasets to study gene function and regulatory interactions.
• Evolutionary Biology Research: Explores conserved genetic pathways and evolutionary changes through cross-species orthologue comparisons.

Methodology:

4DXpress integrates gene expression data from experimental sources including whole mount in situ hybridization, antibody-based assays, and transgenic experiments, annotates expression patterns using anatomy ontologies and developmental stage mappings, and links genes to orthologues and ArrayExpress microarray datasets for cross-species comparison.