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Microorganisms in Medicine and Therapeutics

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.

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Updated: Apr 10, 2026

Production of Double-stranded DNA Ministrings

Production of Double-stranded DNA Ministrings

Published on: February 29, 2016

Minicircle: Next Generation DNA Vectors for Vaccination.

Martin Schleef¹, R Schirmbeck, Michael Reiser

¹PlasmidFactory GmbH & Co. KG, Meisenstr. 96, 33607, Bielefeld, Germany, martin.schleef@plasmidfactory.com.

Methods in Molecular Biology (Clifton, N.J.)

|June 15, 2015

Summary

This summary is machine-generated.

DNA vaccines use pharmaceutical-grade DNA for immunization. Minicircle DNA offers improved safety and higher expression levels compared to traditional plasmids, proving effective in HBV vaccination studies.

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Area of Science:

Biotechnology
Vaccinology
Molecular Biology

Background:

DNA vaccines rely on pharmaceutical-grade nucleic acid sequences encoding target proteins.
Traditional plasmid DNA can contain undesirable bacterial sequences impacting vaccine safety and efficacy.
Minicircle DNA technology emerged to address safety concerns associated with plasmid-based DNA vaccines.

Purpose of the Study:

To review the advantages of minicircle DNA over traditional plasmids for DNA vaccine development.
To highlight the improved safety profile and expression levels of minicircle DNA vaccines.
To present evidence of successful vaccination using minicircle DNA technology.

Main Methods:

Comparison of DNA vaccine constructs based on plasmids versus minicircles.
Evaluation of expression levels and immunogenicity in preclinical models.
Review of existing literature and studies on DNA vaccine technologies.

Main Results:

Minicircle DNA, as circular and covalently closed, supercoiled expression cassettes, demonstrates significantly higher expression levels.
Studies comparing plasmid and minicircle DNA vaccines showed successful vaccination against Hepatitis B Virus (HBV) in mice.
Minicircle DNA offers an improved safety profile by removing bacterial backbone sequences.

Conclusions:

Minicircle DNA represents a significant advancement in DNA vaccine technology, enhancing product safety and efficacy.
The superior expression and safety profile of minicircle DNA make it a promising platform for future vaccine development.
Minicircle DNA vaccines are a viable and effective alternative to traditional plasmid-based vaccines, as demonstrated by HBV vaccination success.