Extracellular Vesicles in Cell–Cell Communications and Potential in Clinical Interventions

Extracellular vesicles, tiny membrane-bound nanoparticles secreted by cells, are widely recognized for their pivotal role in cell-to-cell communication. Consequently, EVs find numerous applications in clinical and therapeutic contexts. The latest classification of extracellular vesicles is based on their relative size, distinct protein markers, and originating cell type. Isolation of these EVs from biological fluids can be achieved through various techniques, including ultracentrifugation, size exclusion chromatography, differential ultracentrifugation, density gradient centrifugation, precipitation-based methods, and immunoaffinity capture. These minuscule vesicles carry a specific “cargo” comprising lipids, proteins, and nucleic acids, which they deliver to nearby target cells. The effectiveness of extracellular vesicle communication hinges on the cargo profile they transport, closely mirroring the originating cell’s physiological state. Extracellular vesicles (EVs) have recently emerged as promising candidates for drug delivery systems due to their remarkable biocompatibility and reduced immunogenicity. They provide a conduit for the targeted delivery of bioactive substances to specific tissues, cells, and organs, facilitating intercellular communication. EVs can be engineered to transport and deliver therapeutic molecules, such as proteins and RNA, making them an elegant vector for in vivo gene therapy and a next-generation tool for nano-scale deliveries. In the realm of regenerative medicine, the ultimate objective is the recovery and restoration of lost or damaged tissue and organ function. Additionally, EVs hold significant potential as biomarkers for diagnosing various diseases.