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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
Retrovirus Life Cycles01:10

Retrovirus Life Cycles

Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
Retroviruses02:33

Retroviruses

Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
Infection01:20

Infection

When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...

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Related Experiment Video

Updated: May 18, 2026

Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques
13:13

Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques

Published on: September 25, 2018

HIV pathogenesis: the host.

A A Lackner1, Michael M Lederman, Benigno Rodriguez

  • 1Tulane National Primate Research Center, Tulane University Health Science Center, Covington, LA 70443, USA. alackner@tulane.edu

Cold Spring Harbor Perspectives in Medicine
|September 7, 2012
PubMed
Summary
This summary is machine-generated.

Early human immunodeficiency virus (HIV) infection events, including CD4(+) T-cell destruction, primarily occur in mucosal tissues. Nonhuman primate models reveal critical early pathogenesis before widespread symptoms appear.

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Peptide-based Identification of Functional Motifs and their Binding Partners
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Peptide-based Identification of Functional Motifs and their Binding Partners

Published on: June 30, 2013

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Last Updated: May 18, 2026

Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques
13:13

Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques

Published on: September 25, 2018

Peptide-based Identification of Functional Motifs and their Binding Partners
14:28

Peptide-based Identification of Functional Motifs and their Binding Partners

Published on: June 30, 2013

Area of Science:

  • Immunology
  • Virology
  • Pathogenesis

Background:

  • Human immunodeficiency virus (HIV) pathogenesis is complex, with key events like transmission and CD4(+) T-cell destruction happening in mucosal tissues.
  • Critical early infection events occur within weeks, often before diagnosis, predominantly in tissues like the gastrointestinal tract.

Purpose of the Study:

  • To elucidate the complex and dynamic pathogenesis of early human immunodeficiency virus (HIV) infection.
  • To understand critical events occurring in mucosal tissues during the initial weeks of HIV infection.

Main Methods:

  • Utilizing nonhuman primate models (simian immunodeficiency virus - SIV) to study early infection stages.
  • Analyzing data from both human and nonhuman primate studies.

Main Results:

  • Massive CD4(+) T-cell depletion occurs in the gastrointestinal tract early in infection, preceding apparent disease consequences.
  • Simian immunodeficiency virus (SIV) in Asian primates causes AIDS, while natural African hosts remain disease-free, offering insights into host-pathogen interactions.

Conclusions:

  • Early HIV pathogenesis, particularly CD4(+) T-cell loss, is concentrated in mucosal tissues and occurs rapidly after infection.
  • Nonhuman primate models provide valuable insights into the complex early events of HIV infection and disease progression.