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Related Experiment Video

Updated: Apr 14, 2026

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
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Is the third interferon a charm?

Sonja M Best1

  • 1Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 903 S. Fourth Street, Hamilton, MT 59840, USA.

Science Translational Medicine
|April 24, 2015
PubMed
Summary
This summary is machine-generated.

Interferon lambda (IFNλ) repairs the blood-brain barrier damaged by West Nile virus. This treatment reduces brain invasion and improves survival rates in infected mice.

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Area of Science:

  • Neurovirology
  • Immunology
  • Infectious Diseases

Background:

  • West Nile virus (WNV) infection can compromise the integrity of the blood-brain barrier (BBB).
  • Disruption of the BBB allows for increased viral entry into the central nervous system, leading to severe neurological complications.
  • Interferon lambda (IFNλ) is a cytokine with known antiviral and immune-modulating functions.

Purpose of the Study:

  • To investigate the role of IFNλ in maintaining or restoring blood-brain barrier integrity during West Nile virus infection.
  • To determine if IFNλ treatment can reduce WNV invasion into the brain.
  • To assess the impact of IFNλ on the survival of WNV-infected mice.

Main Methods:

  • Mice were infected with West Nile virus.
  • Treatment with IFNλ was administered.
  • Blood-brain barrier integrity was assessed.
  • Viral load in the brain was quantified.
  • Survival rates of treated and untreated mice were monitored.

Main Results:

  • IFNλ treatment effectively restored blood-brain barrier integrity that was disrupted by WNV infection.
  • IFNλ administration significantly reduced the invasion of West Nile virus into the brain.
  • Mice treated with IFNλ exhibited increased survival rates compared to control groups.

Conclusions:

  • Interferon lambda plays a crucial role in protecting the central nervous system during West Nile virus infection.
  • IFNλ is a potential therapeutic agent for mitigating WNV-induced neuropathology by preserving BBB integrity.
  • Targeting IFNλ pathways could be a promising strategy for treating viral encephalitis.