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Related Concept Videos

Pharmacokinetics: Drug–Food and Drug–Viral Interactions01:26

Pharmacokinetics: Drug–Food and Drug–Viral Interactions

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A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of...
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Viral Recombination00:57

Viral Recombination

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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.
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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
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Combined Effects of Drugs: Synergism01:27

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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
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Combined Effects of Drugs: Antagonism01:30

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The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
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Related Experiment Video

Updated: Feb 26, 2026

Dissecting Host-virus Interaction in Lytic Replication of a Model Herpesvirus
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Dissecting Host-virus Interaction in Lytic Replication of a Model Herpesvirus

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Double the Trouble When Herpesviruses Join Hands.

Un Yung Choi1, Angela Park1, Jae U Jung1

  • 1Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.

Cell Host & Microbe
|July 14, 2017
PubMed
Summary
This summary is machine-generated.

Humanized mouse models reveal Epstein-Barr virus (EBV) and Kaposi sarcoma-associated herpesvirus (KSHV) work together to promote in vivo tumor formation in primary effusion lymphoma (PEL). This study highlights their complementary roles in aggressive cancer development.

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Area of Science:

  • Virology
  • Oncology
  • Immunology

Background:

  • Primary effusion lymphoma (PEL) is an aggressive lymphoma primarily caused by Kaposi sarcoma-associated herpesvirus (KSHV).
  • Epstein-Barr virus (EBV) is frequently detected alongside KSHV in approximately 70% of PEL cases, suggesting a potential synergistic role.

Purpose of the Study:

  • To investigate the in vivo effects of Epstein-Barr virus (EBV) and Kaposi sarcoma-associated herpesvirus (KSHV) co-infection.
  • To elucidate the complementary roles of EBV and KSHV in the development of primary effusion lymphoma (PEL).

Main Methods:

  • Development of humanized mouse models engrafted with human immune cells and tissues.
  • Infection of these models with EBV and KSHV, individually and concurrently.
  • Assessment of tumor formation and progression in response to viral co-infection.

Main Results:

  • Humanized mouse models successfully recapitulated aspects of EBV/KSHV co-infection.
  • Concurrent EBV and KSHV infection demonstrated a complementary effect on in vivo tumor formation compared to single infections.
  • Evidence suggests a synergistic interaction between EBV and KSHV in promoting lymphomagenesis.

Conclusions:

  • EBV and KSHV exhibit complementary oncogenic functions in vivo.
  • Co-infection with EBV and KSHV enhances tumor development in a humanized mouse model of PEL.
  • Understanding these viral interactions is crucial for developing targeted therapies against KSHV-associated lymphomas.