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Related Concept Videos

Tonsillitis I: Introduction01:30

Tonsillitis I: Introduction

190
Tonsillitis is inflammation of the tonsils, which are two lymphoid tissue masses at the back of the throat. This condition can cause discomfort and irritation in the throat.
Etiology
Three primary contributing factors have been identified.
190
Chronic Pharyngitis01:23

Chronic Pharyngitis

738
Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
738
Tonsillitis II: Management01:26

Tonsillitis II: Management

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This lesson will focus on the different treatment options for managing tonsillitis, which typically depend on the cause and severity.
98
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

705
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...
705
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

683
The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
683
Vaccinations01:51

Vaccinations

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Overview
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Related Experiment Video

Updated: May 17, 2025

Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice
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Tonsils weigh in on flu-specific immunity.

Petter Brodin1

  • 1Department of Women's and Children's Health, Karolinska Institutet, 17165 Solna, Sweden; Department of Immunology and Inflammation, Imperial College London, London, UK; Medical Research Council London Institute of Medical Sciences (LMS), Imperial College Hammersmith Campus, London, UK.

Cell Stem Cell
|April 4, 2025
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Summary

Researchers discovered that T-helper 1 (Th1) cell frequency predicts neutralizing antibody responses to inactivated influenza vaccines. This finding offers insights into vaccine effectiveness and guides future vaccine development.

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Isolation of Tonsillar Mononuclear Cells to Study Ex Vivo Innate Immune Responses in a Human Mucosal Lymphoid Tissue
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Examining the Role of Nasopharyngeal-associated Lymphoreticular Tissue NALT in Mouse Responses to Vaccines
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Isolation of Tonsillar Mononuclear Cells to Study Ex Vivo Innate Immune Responses in a Human Mucosal Lymphoid Tissue
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Examining the Role of Nasopharyngeal-associated Lymphoreticular Tissue NALT in Mouse Responses to Vaccines
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Area of Science:

  • Immunology
  • Vaccinology
  • Translational Medicine

Background:

  • Influenza vaccines are crucial for public health.
  • Understanding immune responses to vaccines is key to improving their efficacy.
  • Current methods for predicting vaccine effectiveness require refinement.

Purpose of the Study:

  • To investigate immune mechanisms underlying influenza vaccine responses.
  • To identify predictors of effective neutralizing antibody generation.
  • To inform the development of more targeted vaccines.

Main Methods:

  • Utilized human tonsil organoids as a model system.
  • Analyzed immune cell populations and antibody production.
  • Correlated specific immune cell frequencies with vaccine responses.

Main Results:

  • Identified T-helper 1 (Th1) cell frequencies as a critical predictor.
  • Demonstrated a correlation between Th1 cell levels and neutralizing antibody titers.
  • Provided mechanistic insights into vaccine-induced immunity.

Conclusions:

  • Th1 cell frequency is a key determinant of inactivated influenza vaccine effectiveness.
  • This discovery offers a potential biomarker for vaccine response.
  • Paves the way for rational design of next-generation influenza vaccines.