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Updated: Jul 5, 2026
High-throughput Detection Method for Influenza Virus
Published on: February 4, 2012
Pattern recognition molecule mindin promotes intranasal clearance of influenza viruses
1Department of Immunology, Duke University Medical Center, Durham, NC 27710, USA.
Abstract:
The innate immune response is essential for host defense against microbial pathogen infections and is mediated by pattern recognition molecules recognizing pathogen-associated molecular patterns. Our previous work has demonstrated that the extracellular matrix protein mindin functions as a pattern recognition molecule for bacterial pathogens. In this study, we examined the role of mindin in influenza virus infection. We found that intranasal infection of mindin-deficient mice by influenza virus resulted in dramatically increased virus titers in the lung and intranasal cavity of mutant mice. In contrast, lungs from intratracheally infected mindin-deficient mice contained similar influenza virus titers. We showed that mindin interacted with influenza virus particles directly and that mindin-deficient macrophages exhibited impaired activation after influenza virus infection in vitro. Furthermore, intranasal administration of recombinant mindin significantly enhanced the clearance of influenza virus in wild-type mice. Together, these results demonstrate that mindin plays an essential role in the host innate immune response to influenza virus infection and suggest that mindin may be used as an immune-enhancing agent in influenza infection.
Insights
Mindin, an innate immune molecule, is crucial for fighting influenza virus infections. Mindin deficiency increases viral load, while its administration enhances viral clearance, highlighting its potential as an immune therapy.
Area of Science:
- Immunology
- Virology
- Biochemistry
Background:
- The innate immune system relies on pattern recognition molecules to detect microbial pathogens.
- Mindin, an extracellular matrix protein, previously identified as a pattern recognition molecule for bacteria.
- The role of mindin in viral infections, specifically influenza, was not previously established.
Purpose of the Study:
- To investigate the function of mindin in the host's innate immune response against influenza virus infection.
- To determine if mindin interacts with influenza virus and influences macrophage activation.
- To evaluate the therapeutic potential of mindin in influenza infection.
Main Methods:
- Utilized mindin-deficient mice for intranasal and intratracheal influenza virus infection models.
- Quantified influenza virus titers in the lungs and nasal cavities of infected mice.
- Performed in vitro studies using mindin-deficient macrophages and influenza virus.
- Assessed the effect of intranasal administration of recombinant mindin on viral clearance in wild-type mice.
Main Results:
- Mindin-deficient mice exhibited significantly higher influenza virus titers in the nasal cavity and lungs after intranasal infection.
- Intratracheal infection showed no significant difference in lung virus titers between wild-type and mindin-deficient mice.
- Mindin directly interacted with influenza virus particles.
- Mindin-deficient macrophages displayed impaired activation following influenza virus exposure in vitro.
- Intranasal administration of recombinant mindin accelerated influenza virus clearance in wild-type mice.
Conclusions:
- Mindin plays a critical role in the innate immune defense against influenza virus, particularly via the intranasal route.
- Mindin's interaction with the virus and its effect on macrophage activation are key mechanisms of its antiviral activity.
- Mindin demonstrates potential as a therapeutic agent for enhancing immune response and viral clearance in influenza infections.
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