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Related Concept Videos

Retrovirus Life Cycles01:10

Retrovirus Life Cycles

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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...
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Size and Structure of Viral Genomes01:26

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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...
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Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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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...
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Retroviruses02:33

Retroviruses

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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’...
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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
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Sexually Transmitted Infections01:26

Sexually Transmitted Infections

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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...
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Related Experiment Video

Updated: Apr 26, 2026

Peptide-based Identification of Functional Motifs and their Binding Partners
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[Pathogenesis of HIV-1].

Karin J Metzner1

  • 1Klinik für Infektionskrankheiten und Spitalhygiene, Universitätsspital Zürich.

Therapeutische Umschau. Revue Therapeutique
|August 6, 2014
PubMed
Summary

Human immunodeficiency virus type 1 (HIV-1) causes lifelong infections leading to AIDS. This review explores how HIV-1 and host factors impact disease progression.

Area of Science:

  • Virology
  • Immunology
  • Pathogenesis

Context:

  • Human immunodeficiency virus type 1 (HIV-1) establishes a chronic, lifelong infection.
  • This infection can lead to acquired immunodeficiency syndrome (AIDS).
  • AIDS is characterized by opportunistic infections and tumors.

Purpose:

  • To summarize current knowledge on HIV-1.
  • To review host factors influencing HIV-1 pathogenesis.
  • To understand the variability in HIV-1 infection progression.

Summary:

  • HIV-1 infection is chronic and lifelong.
  • Disease progression to AIDS is variable.
  • Both viral and host factors influence pathogenesis.

Impact:

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  • Provides a comprehensive overview of HIV-1 pathogenesis.
  • Highlights the interplay between virus and host.
  • Informs future research on HIV-1 and AIDS treatment.