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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Influenza01:27

Influenza

Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
Leaky Scanning02:28

Leaky Scanning

During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...

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Related Experiment Video

Updated: Jun 30, 2026

Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice
07:07

Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice

Published on: June 27, 2020

Killer T cells in influenza.

John Stambas1, Carole Guillonneau, Katherine Kedzierska

  • 1Department of Microbiology and Immunology, University of Melbourne, Royal Parade, Parkville, Victoria 3010, Australia. jstambas@unimelb.edu.au

Pharmacology & Therapeutics
|September 20, 2008
PubMed
Summary

Antigen-specific CD8+ T cells are crucial for clearing influenza virus infections. This review explores their function, memory, and how ageing and vaccines impact immunity, aiding future pandemic preparedness.

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Area of Science:

  • Immunology
  • Virology
  • Infectious Diseases

Background:

  • CD8+ T cells are vital for controlling viral infections, particularly influenza.
  • Understanding the adaptive immune response to influenza is key for public health.

Purpose of the Study:

  • To review current knowledge on influenza virus-specific CD8+ T cell immunity.
  • To discuss factors influencing CD8+ T cell responses, including ageing and vaccination.

Main Methods:

  • Literature review of experimental mouse models and human studies.
  • Analysis of CD8+ T cell killing mechanisms and repertoire selection.
  • Examination of vaccine strategies and the impact of ageing.

Main Results:

  • CD8+ T cells exhibit specific killing functions against influenza-infected cells.
  • Selection and maintenance of influenza-specific effector and memory T cell populations are complex.
  • Ageing significantly affects CD8+ T cell immunity.

Conclusions:

  • A comprehensive understanding of CD8+ T cell immunity is essential for effective influenza vaccine design.
  • Improved vaccines are needed to combat emerging influenza viruses and pandemics.