ExoCarta: A Web-Based Compendium of Exosomal Cargo

Area of Science:

• Extracellular Vesicle Biology
• Molecular Biology
• Bioinformatics

Background:

• Exosomes are key mediators of intercellular communication.
• These vesicles contain a diverse molecular cargo, including proteins, RNA, and lipids.
• Characterizing exosomal content is crucial for understanding their biological roles.

Purpose of the Study:

• To describe ExoCarta, a manually curated web-based compendium of exosomal molecular cargo.
• To provide a comprehensive resource for exosomal proteins, RNAs, and lipids.
• To facilitate functional enrichment and network analysis of exosomal components.

Main Methods:

• Manual curation of exosomal studies.
• Data compilation of proteins, RNAs, and lipids identified in exosomes.
• Annotation of studies based on International Society for Extracellular Vesicles (ISEV) minimal experimental requirements.
• Development of interactive protein-protein interaction networks and biological pathways.
• Integration with the FunRich tool for further analysis.

Main Results:

• ExoCarta hosts 41,860 proteins, >7540 RNA, and 1116 lipid molecules.
• Data is derived from 286 exosomal studies adhering to ISEV standards.
• The database has attracted over 54,000 visitors from 135 countries.
• Features include dynamic interaction networks and downloadable datasets for functional analysis.

Conclusions:

• ExoCarta serves as a valuable, highly accessed resource for exosomal content research.
• The compendium supports in-depth functional and network analysis of exosomal cargo.
• Facilitates standardized characterization of exosomes and their molecular components.