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Related Concept Videos

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...
Sexually Transmitted Infections01:26

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
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...
Viral Recombination00:57

Viral Recombination

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 Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...

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Related Experiment Video

Updated: Jul 12, 2026

Evaluation of the Efficacy And Toxicity of RNAs Targeting HIV-1 Production for Use in Gene or Drug Therapy
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Evaluation of the Efficacy And Toxicity of RNAs Targeting HIV-1 Production for Use in Gene or Drug Therapy

Published on: September 5, 2016

RNA interference and HIV-1 infection.

Luis Isamu Barros Kanzaki1, Socrates Souza Ornelas, Enrique R Argañaraz

  • 1Laboratory of Molecular Pharmacology, Faculty of Health Science, University of Brasília, Brasília, Brazil.

Reviews in Medical Virology
|September 4, 2007
PubMed
Summary

Antiretroviral therapy lowers HIV-1 viral load but doesn't eliminate latent reservoirs. The RNA interference (RNAi) mechanism shows promise for blocking HIV-1 replication by targeting viral transcripts.

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Area of Science:

  • Virology
  • Molecular Biology
  • Immunology

Background:

  • Antiretroviral therapy (ART) effectively suppresses HIV-1 replication but cannot eradicate latent viral reservoirs, posing a significant challenge to complete virus clearance.
  • Understanding host-pathogen interactions is crucial for developing novel strategies to control HIV-1 infection.
  • Recent discoveries highlight host cell factors influencing HIV-1 pathogenesis and replication control.

Purpose of the Study:

  • To explore the potential of the RNA interference (RNAi) mechanism as a novel antiviral strategy against HIV-1.
  • To investigate the role of RNAi, including microRNAs (miRNAs), in the control of HIV-1 replication.

Main Methods:

  • Review of current literature on HIV-1 latency, antiretroviral therapy, and RNA interference pathways.
  • Analysis of the known functions of RNAi in cellular defense mechanisms.
  • Examination of evidence for host and viral microRNA involvement in HIV-1 infection.

Main Results:

  • The RNA interference (RNAi) pathway functions as a conserved defense mechanism against harmful nucleic acids.
  • Both host cells and HIV-1 encode microRNAs (miRNAs) that can influence viral replication.
  • RNAi presents a potential tool for targeting and blocking HIV-1 replication by interfering with viral transcripts.

Conclusions:

  • The RNA interference (RNAi) mechanism, including the action of microRNAs (miRNAs), represents a promising avenue for developing new therapeutic strategies to combat HIV-1.
  • Harnessing RNAi could offer a novel approach to target latent viral reservoirs and achieve better control over HIV-1 infection.
  • Further research into RNAi pathways may uncover critical insights into HIV-1 pathogenesis and control.