Viral Integration
Viral Integration - Related Videos
12:57
Alternative In Vitro Methods for the Determination of Viral Capsid Structural Integrity
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Cited by 6 •
2017
Routine detection methods utilizing viral genome amplification are limited by their inability to discriminate infectious from non-infectious particles. The purpose of this article is to provide detailed protocols for alternative methods to aid in discrimination of infectious norovirus particles using aptamer binding, dynamic light scattering, and transmission electron microscopy.
11:14
Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection
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Cited by 3 •
2018
We describe here the in vitro generation of HBV DNA via a Hepatitis B virus infection system and the highly sensitive detection of its (1–2 copies) integration using inverse nested PCR.
02:41
Concentration and Purification of Viral Particles
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2026
Source: Fricano-Kugler, C. J., et al. Designing, Packaging, and Delivery of High Titer CRISPR Retro and Lentiviruses via Stereotaxic Injection. J. Vis. Exp. (2016).This video demonstrates the step-by-step process for concentrating and purifying lentiviral particles from a mixed suspension containing host cell debris. The procedure utilizes centrifugation, filtration, and PEG-salt precipitation to isolate viral particles while removing soluble impurities. The final product is resuspended in a...
00:57
Viral Recombination
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2019
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment. Viral Recombination Can Create New Diseases Some diseases can infect multiple species. For example, pigs can be infected by some human and...
00:56
Viral Structure
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2019
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid. Structural Classes of Viruses Many criteria are used to classify viruses, including capsid design. Most viruses...
FAQs
Integrase provides the key catalytic function that places viral DNA within a host chromosome after viral RNA has been reverse-transcribed into DNA. The resulting location can influence whether the inserted sequence remains silent or supports production of new viral components. This chromosomal step helps explain how infection can persist rather than being limited to an immediate episode.
An integrated sequence may remain silent, or it may direct production of new viral components, creating different effects on the infected cell. Because the viral material resides within a host chromosome, its activity can also shape cellular behavior and provide a system for examining how genetic information is regulated during infection.
Insertional mutagenesis refers to changes that can occur when inserted viral genetic material affects host genes or genome organization. Its importance lies in the potential connection between an integration event and altered cellular behavior. Studying this process helps researchers investigate genome stability while also identifying risks associated with persistent viral DNA in host chromosomes.
A conceptual analysis follows the viral genetic material from RNA reverse transcription to DNA, then examines its insertion into a host chromosome and its subsequent activity. Researchers can evaluate whether the sequence remains silent or directs viral component production. This framework connects molecular events with persistence, cellular behavior, gene regulation, and genome stability.
Engineered integrating viruses are used when researchers want viral genetic material to become part of a host cell’s genome for experimental or clinical gene-delivery work. Their integration can support persistence of the delivered information, making them relevant to gene therapy. Because insertion may disrupt host genes, use requires careful assessment of possible effects.
Safety assessment must consider whether integration disrupts host genes or produces undesirable changes in cellular behavior. The same chromosomal incorporation that can support persistent delivery may also create risks through insertional mutagenesis. For this reason, engineered integrating viruses require careful evaluation before their use in experimental or clinical gene-therapy applications.