Viral Latency
Viral Latency - Related Videos
12:22
A Primary Neuron Culture System for the Study of Herpes Simplex Virus Latency and Reactivation
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Cited by 49 •
2012
The protocol describes an efficient and reproducible model system to study herpes simplex virus type 1 (HSV-1) latency and reactivation. The assay employs homogenous sympathetic neuron cultures and allows for the molecular dissection of virus-neuron interactions using a variety of tools including RNA interference and expression of recombinant proteins.
07:10
Humanized NOD/SCID/IL2rγnull (hu-NSG) Mouse Model for HIV Replication and Latency Studies
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Cited by 14 •
2019
This protocol provides a method to establish humanized mice (hu-NSG) via intrahepatic injection of human hematopoietic stem cells into radiation-conditioned neonatal NSG mice. The hu-NSG mouse is susceptible to HIV infection and combinatorial antiretroviral therapy (cART) and serves as a suitable pathophysiological model for HIV replication and latency investigations.
01:16
Psychosexual Stages of Personality: Latency
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2025
Following the phallic stage in Freud's theory of psychosexual development, children enter a phase called the latency period, which lasts from approximately six to twelve years of age. Unlike earlier stages, where sexual impulses played a central role, Freud believed these impulses are repressed during the latency period, becoming part of the unconscious. This stage is often described as a time of psychological calm after the turbulence of the phallic stage. The latency period is not considered...
13:45
Using a Pan-Viral Microarray Assay (Virochip) to Screen Clinical Samples for Viral Pathogens
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Cited by 83 •
2011
The Virochip is a pan-viral microarray designed to simultaneously detect all known viruses as well as novel viruses on the basis of conserved sequence homology. Here we demonstrate how to run a Virochip assay to analyze clinical samples for the presence of both known and unknown viruses.
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...
FAQs
Restricted viral gene expression limits the activity needed for productive replication, while cellular regulation helps keep the viral genome in a low-activity state. These controls reduce the formation of infectious particles and help prevent immediate cell destruction. Their combined effect allows the infection to persist until changes in cellular conditions or immune control permit renewed viral activity.
During latency, a viral genome may remain as an episome, meaning it persists separately from host chromosomes, or it may integrate into host DNA. These two arrangements describe different forms of genome persistence within the cell. Recognizing this distinction helps explain how viral genetic material remains available for restricted expression and possible reactivation.
Immune control is one factor that suppresses active viral replication during latency. If that control changes, the balance maintaining restricted viral activity may be disrupted, allowing reactivation. This relationship helps explain why latent infections can recur rather than simply disappear, and why immune regulation is important when investigating persistent viral infections.
An actively replicating infection produces infectious particles more readily and may damage cells as replication proceeds. In contrast, latency is associated with restricted viral activity, few or no infectious particles, and avoidance of immediate cell destruction. Comparing these states helps researchers distinguish persistence from ongoing productive replication and interpret why symptoms or infectious output may change over time.
Research on Viral Latency helps connect the continued presence of viral genetic material with infections that persist or return after periods of limited activity. It also clarifies how restricted replication, cellular regulation, and immune evasion contribute to recurrence. These insights provide a biological basis for explaining why an infection can remain clinically relevant without constant production of infectious particles.
Latent viral reservoirs are important because viral genetic material can remain in host cells even when active production of infectious particles is limited. Consequently, antiviral research must consider persistence as well as immediate replication. Understanding these reservoirs guides strategies aimed at addressing the source of recurring infection and may also clarify how some viruses contribute to long-term disease and cancer.