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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...
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...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
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’...
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...
Viral Hepatitis I: Introduction01:28

Viral Hepatitis I: Introduction

Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...

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Updated: May 14, 2026

Rapid Screening of HIV Reverse Transcriptase and Integrase Inhibitors
05:46

Rapid Screening of HIV Reverse Transcriptase and Integrase Inhibitors

Published on: April 9, 2014

Integrase Inhibitors: Redefining HIV-1 Treatment and Future Challenges.

Krishan K Pandey1

  • 1Associate Research Professor in the Department of Microbiology and Molecular Immunology, at Saint Louis University School of Medicine, St. Louis, Missouri, USA.

Missouri Medicine
|May 13, 2026
PubMed
Summary

HIV-1 integrase strand transfer inhibitors (INSTIs) have revolutionized HIV/AIDS treatment, offering effective therapies. New allosteric inhibitors are advancing, promising further improvements in managing HIV-1 infection.

Keywords:
AIDSHIV-1antiviral drugsintegrase strand transfer inhibitors

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Area of Science:

  • Antiviral drug discovery
  • Retroviral enzymology
  • HIV-1/AIDS therapeutics

Background:

  • HIV-1 integrase strand transfer inhibitors (INSTIs) are a major success in antiviral drug development.
  • Five INSTIs are currently approved, with second-generation drugs like Dolutegravir, Bictegravir, and Cabotegravir offering superior efficacy and resistance profiles.
  • Cabotegravir's long-acting formulation is also used for HIV pre-exposure prophylaxis.

Purpose of the Study:

  • To review the mechanisms of HIV-1 integration.
  • To discuss the development and clinical use of INSTIs.
  • To highlight structural biology advancements and future challenges in HIV/AIDS management.

Main Methods:

  • Review of scientific literature on HIV-1 integrase inhibitors.
  • Analysis of clinical trial data and drug approvals.
  • Examination of structural biology studies guiding inhibitor design.

Main Results:

  • INSTIs have transformed HIV-1/AIDS therapy, providing highly effective treatments.
  • Second-generation INSTIs demonstrate excellent virologic suppression and tolerability.
  • Allosteric integrase inhibitors (ALLINIs) are progressing in clinical trials.

Conclusions:

  • INSTIs represent a significant achievement in combating HIV-1/AIDS.
  • Ongoing research into ALLINIs and structural biology promises further therapeutic advancements.
  • Challenges remain in managing HIV-1/AIDS, necessitating continued research and development.