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Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

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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.
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Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
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Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin,...
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Outer membrane vesicles: A bacterial-derived vaccination system.

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Frontiers in Microbiology
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Summary
This summary is machine-generated.

Outer membrane vesicles (OMVs) are bacterial nanostructures. Engineered OMVs show promise as vaccines and drug delivery systems by modifying their surface antigens and cargo.

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bacteriaglycoengineeringlipopolysaccharideouter membrane vesiclevaccine

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Area of Science:

  • Microbiology and Immunology
  • Nanotechnology
  • Bacterial Pathogenesis

Background:

  • Outer membrane vesicles (OMVs) are key mediators of bacterial interactions and pathogenesis.
  • OMVs play roles in communication, gene transfer, and bacterial fitness.
  • Their inherent immunogenicity and structural properties make them attractive for biotechnological applications.

Purpose of the Study:

  • To review OMV manipulation strategies for enhanced vesiculation and reduced antigenicity.
  • To explore the utility of engineered OMVs as vaccines.
  • To discuss novel engineering approaches for expanding OMV applications.

Main Methods:

  • Glycoengineering and genetic/chemical modification of OMVs.
  • Analysis of OMV-based vaccine efficacy.
  • Investigation of OMV cargo loading and delivery.

Main Results:

  • Engineered OMVs can express specific antigens for targeted immunization.
  • OMVs can be modified to reduce their inherent immunogenicity.
  • Successful cargo loading demonstrates potential for drug delivery applications.

Conclusions:

  • OMVs are versatile nanostructures with significant potential in vaccinology and drug delivery.
  • Strategic engineering can enhance OMV utility while mitigating adverse immune responses.
  • Further research into OMV manipulation will unlock novel therapeutic and prophylactic applications.