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Related Concept Videos

Introduction to Lymphatic and Immune System01:23

Introduction to Lymphatic and Immune System

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Immunity is a crucial biological concept about our body's inherent capacity to prevent infections and diseases. A complex network of cells and tissues collectively known as the immune system facilitates this natural defense mechanism. The immune system plays an integral role in maintaining our health and well-being, shielding us from potential health threats.
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are born...
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Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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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
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...
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Functions of the Lymphatic and Immune System01:28

Functions of the Lymphatic and Immune System

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The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
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Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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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.
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Inflammatory Response01:28

Inflammatory Response

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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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T Cell Types and Functions01:24

T Cell Types and Functions

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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.
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High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
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The Lymphotoxin Network: orchestrating a type I interferon response to optimize adaptive immunity.

Jennifer L Gommerman1, Jeffrey L Browning2, Carl F Ware3

  • 1Department of Immunology, University of Toronto, Toronto, Ontario, Canada.

Cytokine & Growth Factor Reviews
|April 5, 2014
PubMed
Summary

The Lymphotoxin (LT) pathway, particularly LT-beta receptor (LTβR) signaling, is crucial for immune system homeostasis and Type I interferon (IFN-I) production. Inhibiting LTβR shows promise in autoimmune disease models.

Keywords:
AutoimmunityDendritic cellsInterferon (IFN)Lymphotoxin-αβ (LTαβ)Stromal cells

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • The Lymphotoxin (LT) pathway is vital for lymphoid organ development and homeostasis.
  • Emerging research highlights the LT-beta receptor (LTβR) pathway's role in Type I interferon (IFN-I) production during homeostasis and infection.
  • LTβR signaling influences stromal cells, macrophages, and dendritic cells in immune responses.

Purpose of the Study:

  • To review the connection between the Lymphotoxin Network and Type I interferon (IFN-I) responses.
  • To explore the impact of LTβR signaling on immune cell function and autoimmune diseases.

Main Methods:

  • Literature review of the Lymphotoxin pathway and IFN-I signaling.
  • Analysis of LTβR's role in lymphoid organ development and immune cell differentiation.
  • Examination of LTβR inhibition effects in autoimmune disease models.

Main Results:

  • LTβR signaling is essential for rapid IFN-I production by stromal cells and macrophages during viral infections, independent of TLR pathways.
  • LTβR signaling supports homeostatic IFN-I levels from dendritic cells, crucial for CD8+ T cell cross-priming.
  • Pharmacological inhibition of LTβR in mice demonstrates significant therapeutic potential in autoimmune disease models.

Conclusions:

  • The Lymphotoxin Network, via LTβR, plays a multifaceted role in immune regulation, impacting both infectious and autoimmune conditions.
  • Further research is needed to elucidate the precise mechanisms linking LTβR-mediated IFN-I production to therapeutic effects in chronic autoimmune inflammation.