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What are Viruses?00:50

What are Viruses?

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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
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Microorganisms 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.
Introduction to Virus01:28

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Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...
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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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Updated: May 26, 2026

Engineering and Evolution of Synthetic Adeno-Associated Virus AAV Gene Therapy Vectors via DNA Family Shuffling
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Advances in foamy virus vector systems: Development and applications.

Soo-Yeon Cho1, Kyoung-Dong Kim1, Cha-Gyun Shin1

  • 1Department of Systems Biotechnology, Chung-Ang University, Anseong, 17456, Republic of Korea.

Virology
|November 7, 2024
PubMed
Summary
This summary is machine-generated.

Foamy virus (FV) vectors offer a safer alternative for gene therapy due to their integration profile and large transgene capacity. These non-pathogenic vectors show promise for treating genetic diseases and developing anti-HIV therapies.

Keywords:
Foamy virus vector systemGene therapyHIV vaccineHematopoietic stem cellHeparan sulfateNon-pathogenic

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Area of Science:

  • * Gene Therapy and Virology
  • * Retroviral Vector Development

Background:

  • * Foamy viruses (FVs) are retroviruses with a favorable integration profile for gene therapy applications.
  • * Prototype FV (PFV) vectors have been engineered for high-titer, large transgene delivery and replication incompetence, enhancing safety.
  • * FV's broad host tropism is attributed to heparan sulfate (HS) binding via the FV Env receptor-binding domain (RBD).

Purpose of the Study:

  • * To review the development and utilization of FV vector systems for gene therapy.
  • * To highlight the advantages of FV vectors, including safety, broad tropism, transgene capacity, and persistence.
  • * To discuss the potential of FV vectors in addressing current gene therapy challenges and treating genetic diseases.

Main Methods:

  • * Review of existing literature on FV vector system development and applications.
  • * Analysis of PFV vector iterations, including third-generation and dual-vector systems.
  • * Examination of FV vector use in hematopoietic stem cell (HSC) gene therapy models.

Main Results:

  • * FV vectors demonstrate a safer integration profile compared to other retroviruses.
  • * Engineered PFV vectors accommodate large transgenes and are replication-incompetent.
  • * FV vectors have shown efficacy in HSC gene therapy for monogenic diseases and anti-HIV applications in preclinical models.
  • * Vectors successfully delivered anti-HIV transgenes and induced antibodies against HIV.

Conclusions:

  • * FV vector systems are valuable tools for gene therapy, offering unique advantages like non-pathogenicity and broad host tropism.
  • * Further development, including stable producer cell lines, will enhance gene delivery efficiency.
  • * FV vectors hold significant potential for treating genetic disorders and advancing anti-HIV gene therapy and vaccine strategies.