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Bacterial Transformation

Bacterial Transformation

In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...

Bacterial Transformation

Bacterial Transformation

In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...

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Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...

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Related Experiment Video

Updated: Jul 19, 2026

Production of Double-stranded DNA Ministrings

Production of Double-stranded DNA Ministrings

Published on: February 29, 2016

[Development of plasmid DNA-based gene transfer].

Yoshiaki Taniyama¹, Ryuichi Morishita

¹Department of Clinical Gene Therapy, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita City 565-0871, Japan. taniyama@cgt.med.osaka-u.ac.jp

Yakugaku Zasshi : Journal of the Pharmaceutical Society of Japan

|November 2, 2006

Summary

Ultrasound-mediated gene transfer using microbubbles offers a safe and efficient method for gene therapy. This novel approach enhances gene delivery and expression, overcoming limitations of viral vectors for various diseases.

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Last Updated: Jul 19, 2026

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Published on: February 17, 2017

Area of Science:

Biotechnology
Molecular Biology
Medical Imaging

Context:

Gene therapy holds promise for treating diseases like cancer and cardiovascular conditions.
Current gene transfer methods, including viral vectors, face challenges with safety and efficiency.
Advances in molecular biology have improved gene transfer technologies.

Purpose:

To explore ultrasound-mediated gene transfer as a safe and efficient alternative to viral vectors.
To investigate the use of naked plasmid DNA with ultrasound or microbubble-enhanced ultrasound for gene delivery.

Summary:

Ultrasound with microbubbles facilitates enhanced gene transfer and local gene expression.
Successful gene transfer into the fetal central nervous system was achieved using microbubble-enhanced ultrasound.
This method offers theoretical advantages over viral vectors, including safety and simplicity.

Impact:

Provides a novel, safer approach for gene therapy applications.
Potential to improve treatment outcomes for various diseases.
Opens new avenues for research in non-viral gene delivery systems.