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Related Concept Videos

Gene Therapy00:59

Gene Therapy

28.0K
Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...
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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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Related Experiment Video

Updated: Mar 21, 2026

Production of Double-stranded DNA Ministrings
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Production of Double-stranded DNA Ministrings

Published on: February 29, 2016

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Towards effective non-viral gene delivery vector.

Michaela Šimčíková1,2, Kristala L J Prather1,3, Duarte M F Prazeres1,3,4

  • 1a MIT-Portugal Program.

Biotechnology & Genetic Engineering Reviews
|May 11, 2016
PubMed
Summary
This summary is machine-generated.

Optimizing plasmid DNA design is crucial for successful gene therapy. Minimal vectors, lacking bacterial DNA, show enhanced transfection and expression, but manufacturing challenges hinder clinical adoption.

Keywords:
DNA vaccinegene therapyminicircleminimal vectorsrecombinationtransgene silencing

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Area of Science:

  • Biopharmaceuticals
  • Gene Therapy
  • Molecular Biology

Background:

  • Plasmid DNA (pDNA) based biopharmaceuticals show good safety but face challenges in clinical trials.
  • Low transfection efficiency and transient transgene expression limit pDNA efficacy.
  • Both pDNA design and delivery methods contribute to these limitations.

Purpose of the Study:

  • To analyze the impact of plasmid DNA design elements on biopharmaceutical performance.
  • To identify specific DNA elements that hinder or enhance therapeutic efficacy.
  • To evaluate the potential of minimal vectors over conventional plasmids.

Main Methods:

  • Analysis of detrimental DNA elements in conventional plasmids (e.g., CpG motifs, bacterial origins).
  • Identification of beneficial elements for enhanced therapeutic protein expression (e.g., optimized promoters, introns).
  • Comparison of minimal vectors (eukaryotic expression cassette only) with conventional plasmids.

Main Results:

  • Specific DNA elements like CpG motifs and bacterial origins negatively impact pDNA performance.
  • Optimized promoters, codon optimization, and introns improve transgene expression and clinical efficacy.
  • Minimal vectors exhibit superior expression levels, bioavailability, and transfection rates compared to conventional plasmids.

Conclusions:

  • Careful plasmid DNA engineering, focusing on eliminating detrimental elements and incorporating beneficial ones, can significantly improve biopharmaceutical efficacy.
  • Minimal vectors represent a promising advancement, offering enhanced therapeutic effects.
  • Manufacturing challenges associated with minimal vectors currently impede their widespread clinical use.