Viral Suspension
Viral Suspension - Related Videos
10:17
The Tail Suspension Test
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Cited by 534 •
2012
The tail-suspension test is validated as an experimental procedure to assess antidepressant efficacy of drug treatments in mice. Mice are suspended by their tails for six minutes and escape-related behaviors are assessed. We describe procedures used in conducting the tail suspension test.
03:39
Preparation of Virus-Enriched Suspension Using Stepwise Sucrose Centrifugation
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2026
Source: Vijayraghavan, S. and Kantor, B. A Protocol for the Production of Integrase-deficient Lentiviral Vectors for CRISPR/Cas9-mediated Gene Knockout in Dividing Cells. J. Vis. Exp., (2017)This video demonstrates a two-step ultracentrifugation method using sucrose gradients and cushions to purify and concentrate viral particles from cell culture supernatant. The procedure enables separation based on buoyant density, allowing recovery of intact virus suitable for downstream applications.
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...
04:16
ECM Suspension Preparation: A Technique to Obtain Homogenous Suspension from Tissue-derived Extracellular Matrix
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2023
This video describes the preparation of a homogenized and digested extracellular matrix suspension from decellularized and lyophilized tissues. This technique helps in fabricating ECM-derived porous foams and microcarriers for use as substrates in advanced 3D cell culture models.
FAQs
After addition, infectious particles first contact the cell surface and bind receptors compatible with that virus. This receptor interaction determines whether entry can occur in a particular host cell. Because receptor compatibility varies between viruses and cells, the same preparation may produce different infection outcomes across cultured cell types, an important consideration when interpreting cancer-cell assays.
The outcome depends on both the virus and the host cell. In one setting, entered virions may replicate, increasing the infectious process within cells; in another, they may primarily deliver genetic material. Distinguishing these possibilities helps researchers interpret changes in cancer-cell behavior and separate effects associated with viral multiplication from those linked to delivered genetic information.
Reproducibility depends strongly on standardized viral concentration, storage, and exposure conditions. Keeping these factors consistent helps ensure that differences between experiments reflect biological responses rather than variation in how cells received the preparation. In cancer studies, this consistency is especially important when comparing effects on cell survival, gene expression, or immune responses.
Researchers add the preparation to cultured cells under defined exposure conditions, allowing virions to contact the cell surface, bind compatible receptors, and enter susceptible cells. They then evaluate the resulting response according to the study design. Relevant measurements may include cancer-cell survival, changes in gene expression, or alterations in immune responses associated with viral treatment.
Cancer researchers use these preparations in infection assays, in the production and testing of viral vectors, and in evaluations of oncolytic viruses. These applications allow investigators to study how viral agents interact with cultured cancer cells, deliver genetic material, or produce effects relevant to tumor-cell damage and experimental therapeutic development.
The exposure can be assessed through changes in cancer-cell survival, gene expression, and immune responses. Together, these outcomes help characterize how a viral agent affects tumor-associated cells and whether its activity is consistent with replication, genetic delivery, or selective damage. Standardized exposure conditions make comparisons among treatments and experiments more interpretable.