Proteomic profiling of Gram‐negative bacterial outer membrane vesicles: Current perspectives

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Abstract

Outer membrane vesicles (OMVs) are extracellular vesicles derived from Gram-negative bacteria. Recent progress in the studies of Gram-negative bacterial extracellular vesicles implies that OMVs may function as intercellular communicasomes in bacteria-bacteria and bacteria-host interactions. Current MS-based high-throughput proteomic analyses of Gram-negative bacterial OMVs have identified thousands of vesicular proteins and provided clues to reveal the biogenesis and pathophysiological functions of Gram-negative bacterial OMVs. The future directions of proteomics of Gram-negative bacterial OMVs may include the isolation strategy of Gram-negative bacterial OMVs to thoroughly exclude nonvesicular contaminants and proteomics of Gram-negative bacterial OMVs derived from diverse conditions as well as body fluids of bacterium-infected hosts. We hope this review will shed light on future research in this emerging field of proteomics of extracellular vesicles derived from Gram-negative bacteria and contribute to the development of OMV-based diagnostic tools and effective vaccines.

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