Related Experiment Video
Updated: Jul 16, 2026
09:56
Scalable Isolation and Purification of Extracellular Vesicles from Escherichia coli and Other Bacteria
Published on: October 13, 2021
Engineered bacterial extracellular vesicles as next-generation precision postbiotics: strategies, challenges and
Jiali Chen1,2,3, Qiyan Chen1,3, Baoxian Li1,2
1Xianghu Laboratory, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China.
Extracellular Vesicles and Circulating Nucleic Acids
|July 15, 2026
Summary
Engineered bacterial extracellular vesicles (eBEVs) offer a precision postbiotic approach, overcoming limitations of natural versions for targeted therapeutic delivery and enhanced health benefits.
Area of Science:
- Microbiology
- Nanotechnology
- Biotechnology
Background:
- Postbiotics, derived from inactivated microorganisms, offer advantages over probiotics.
- Bacterial extracellular vesicles (BEVs) are natural nanoparticles mediating host communication and acting as postbiotics.
- Natural BEVs (nBEVs) face limitations in therapeutic applications, including safety, specificity, and heterogeneity.
Purpose of the Study:
- To explore the potential of engineered BEVs (eBEVs) as advanced, targeted postbiotic agents.
- To highlight how eBEVs overcome the limitations of nBEVs for therapeutic applications.
- To discuss the future prospects and challenges of eBEVs in treating various disorders.
Main Methods:
- Genetic modification of parent bacteria for BEV engineering.
- Surface functionalization of BEVs for targeted delivery.
- Tailored cargo loading into BEVs to enhance therapeutic efficacy.
Main Results:
- Engineered BEVs (eBEVs) function as precise delivery platforms, expanding postbiotic scope and efficacy.
- eBEVs address safety, specificity, and heterogeneity issues associated with nBEVs.
- eBEVs represent a novel class of next-generation precision postbiotics.
Conclusions:
- eBEVs merge natural vesicle biocompatibility with synthetic nanomedicine precision for advanced therapeutics.
- Challenges in clinical translation include scalable manufacturing, safety profiling, and regulatory frameworks.
- Future research should focus on smart, stimulus-responsive BEVs and rigorous clinical trials.
More Related Videos
Related Concept Videos
01:29Microorganisms in Medicine and Therapeutics
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
01:22Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
01:27Upstream Processing
Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
01:30Production of Pharmaceuticals
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...
01:26Bacterial Translocation and Protein Secretion
Bacterial protein secretion involves translocation systems to ensure proteins reach their designated locations, including the plasma membrane, periplasm, outer membrane, or the external environment. These translocation systems are vital for bacterial physiology, supporting processes like membrane assembly, enzymatic activity in the periplasm, and interactions with the external environment. The division of labor between Sec and Tat pathways ensures efficiency in handling proteins with diverse...