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Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
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The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
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AAV Vectorization of DSB-mediated Gene Editing Technologies.

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Adeno-associated virus (AAV) vectors facilitate gene editing by delivering repair templates or endonuclease genes. While efficient, AAV vectors present challenges for precise gene editing applications.

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Area of Science:

  • Molecular Biology
  • Gene Therapy
  • Biotechnology

Background:

  • Programmable site-specific endonuclease technologies like zinc-finger nucleases (ZFNs) and CRISPR/Cas9 are advancing directed gene editing.
  • Adeno-associated virus (AAV) vectors are established as efficient in vivo gene delivery systems, with over 100 clinical trials demonstrating safety.
  • AAV vector genomes are recognized as favorable substrates for homology-directed repair, crucial for gene editing processes.

Purpose of the Study:

  • To review the synergistic roles of AAV vectors and gene editing technologies.
  • To explore the application of these combined technologies in treating genetic diseases.
  • To provide insights into the advantages and disadvantages of using AAV vectors for gene editing.

Main Methods:

  • Review of existing scientific literature on AAV vectors and gene editing technologies.
  • Analysis of studies demonstrating the use of endonucleases with AAV for gene editing.
  • Examination of clinical trial data involving AAV vectors.

Main Results:

  • AAV vectors are effectively used for delivering gene editing tools and repair substrates.
  • The combination of AAV and gene editing shows promise for therapeutic applications.
  • Certain AAV vector attributes, while beneficial for delivery, pose challenges for precise gene editing.

Conclusions:

  • The combination of AAV vectors and gene editing technologies represents a powerful strategy for genetic disease treatment.
  • Further research is needed to optimize AAV vector characteristics for enhanced gene editing efficiency and specificity.
  • This review highlights trending applications and future directions for AAV-mediated gene editing therapies.