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Related Concept Videos

Antimicrobial Proteins01:23

Antimicrobial Proteins

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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
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Immune Response Against Viral Pathogens01:29

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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.
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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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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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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Related Experiment Video

Updated: Mar 8, 2026

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
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Type I Interferons in Bacterial Infections: A Balancing Act.

Pavel Kovarik1, Virginia Castiglia1, Masa Ivin1

  • 1Max F. Perutz Laboratories, University of Vienna , Vienna , Austria.

Frontiers in Immunology
|January 14, 2017
PubMed
Summary

Type I interferons (IFN) play a dual role in bacterial infections, impacting immune and tissue homeostasis. Understanding these dual roles is crucial for managing severe infectious diseases and improving host recovery.

Keywords:
bacterial infectionchemokinescytokinesimmunomodulationimmunosuppressioninnate immunityresilience to infectionstype I interferon

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Experimental Infection with Listeria monocytogenes as a Model for Studying Host Interferon-γ Responses
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Related Experiment Videos

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Area of Science:

  • Immunology
  • Microbiology
  • Pathophysiology

Background:

  • Immune defense against bacteria requires homeostasis for tissue repair and host recovery.
  • Failures in homeostatic processes, not just pathogen clearance, often lead to severe infections.
  • Type I interferons (IFN) are implicated in regulating immune and tissue homeostasis during bacterial infections.

Conclusions:

  • Type I interferons (IFN) are critical regulators of immune and tissue homeostasis during bacterial infections, with complex and context-dependent effects.
  • Further research is needed to elucidate the specific effector mechanisms and understand the ambivalent roles of type I IFNs to harness their therapeutic potential.
  • Addressing the knowledge gaps in type I IFN function is essential for developing effective strategies against severe bacterial infections.