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Related Concept Videos

Introduction to Innate and Adaptive Immunity01:21

Introduction to Innate and Adaptive Immunity

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The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
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Cells of the Innate Immune Response01:28

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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.
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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
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Introduction to Lymphatic and Immune System01:23

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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.
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Related Experiment Video

Updated: Mar 13, 2026

Isolation of Group 2 Innate Lymphoid Cells from Mouse Nasal Mucosa to Detect the Expression of CD226
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Intercellular communication for innate immunity.

Tan A Nguyen1, Ken C Pang2, Seth L Masters1

  • 1Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville 3052, Australia; Department of Medical Biology, The University of Melbourne, Parkville 3010, Australia.

Molecular Immunology
|October 23, 2016
PubMed
Summary
This summary is machine-generated.

Infected cells can transfer signals to bystander cells, activating innate immunity and bypassing pathogen evasion tactics. This cell-to-cell communication enhances the host

Keywords:
ExosomesInflammasomeInnate immunityIntercellular transferSTINGType I interferon

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Area of Science:

  • Immunology
  • Cell Biology
  • Microbiology

Background:

  • Effective innate immune responses depend on pattern recognition receptors (PRRs) detecting pathogen-associated molecular patterns (PAMPs), leading to cytokine and chemokine production.
  • Pathogens like viruses and bacteria have evolved mechanisms to evade or suppress host innate immunity in infected cells.

Purpose of the Study:

  • To review the intercellular transfer of pathogen- or host-derived molecules from infected to uninfected cells.
  • To discuss how this transfer potentiates innate immune signaling and bypasses pathogen evasion strategies.

Main Methods:

  • Literature review of studies investigating intercellular communication in innate immunity.
  • Analysis of mechanisms for transferring RNA, DNA, and proteins between cells.

Main Results:

  • Infected or dying cells can transmit PAMPs and PRR signaling molecules to neighboring bystander cells.
  • This bystander activation of innate immunity represents a crucial cell-to-cell communication pathway.

Conclusions:

  • Intercellular transfer of molecular signals enhances host innate immune responses against infections.
  • This mechanism provides an alternative route for controlling pathogens, independent of direct pathogen recognition within each cell.