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Related Concept Videos

Immunological Memory01:23

Immunological Memory

Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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,...
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...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.

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Related Experiment Video

Updated: May 21, 2026

Whole Blood Assay with Dual Co-Stimulation for Antigen-Specific Analysis of Host Immunity to Fungal and Viral Pathogens
06:03

Whole Blood Assay with Dual Co-Stimulation for Antigen-Specific Analysis of Host Immunity to Fungal and Viral Pathogens

Published on: September 20, 2024

To forge a solid immune recognition.

Yan Shi1

  • 1Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China. yanshi@biomed.tsinghua.edu.cn

Protein & Cell
|June 22, 2012
PubMed
Summary

Cellular membranes may sense solid structures through lipid interactions, triggering innate immune responses. This perspective proposes a lipid-based mechanism for phagocytosis of solids, distinct from protein-mediated pathways.

Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Phagocytosis and innate immune responses to solid structures are complex and debated.
  • Various crystalline substances (e.g., alum, silica) activate phagocytes, but mechanisms are not fully understood.
  • Existing models focus on protein-mediated recognition (receptors, Toll-like receptors, NLRs).

Purpose of the Study:

  • To propose an alternative, general mechanism for sensing solid structures by cells.
  • To explore the role of membrane lipids in cellular activation upon encountering solids.
  • To invite debate on lipid-mediated solid recognition in phagocytosis.

Main Methods:

  • Perspective-based argument drawing on evolutionary principles.
  • Integration of knowledge on cellular membranes and phagocytosis.

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Imaging the Human Immunological Synapse
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Imaging the Human Immunological Synapse

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Last Updated: May 21, 2026

Whole Blood Assay with Dual Co-Stimulation for Antigen-Specific Analysis of Host Immunity to Fungal and Viral Pathogens
06:03

Whole Blood Assay with Dual Co-Stimulation for Antigen-Specific Analysis of Host Immunity to Fungal and Viral Pathogens

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Unraveling Key Players of Humoral Immunity: Advanced and Optimized Lymphocyte Isolation Protocol from Murine Peyer's Patches
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Unraveling Key Players of Humoral Immunity: Advanced and Optimized Lymphocyte Isolation Protocol from Murine Peyer's Patches

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Imaging the Human Immunological Synapse
09:37

Imaging the Human Immunological Synapse

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  • Hypothesizing lipid-surface interactions as a primary sensing mechanism.

    • Main Results:

    • Membrane lipids can directly engage solid surfaces.
    • The intensity of lipid-solid binding correlates with cellular activation.
    • This offers a potentially universal mechanism for solid sensing.

    Conclusions:

    • Lipid-based recognition presents a novel angle on phagocytosis of solids.
    • This mechanism complements or offers an alternative to protein-centric models.
    • Further research is warranted to validate the role of membrane lipids in innate immunity.