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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
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,...
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.
Antigen Presenting Cells01:22

Antigen Presenting Cells

The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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...

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Related Experiment Video

Updated: Jul 20, 2026

Interview: Glycolipid Antigen Presentation by CD1d and the Therapeutic Potential of NKT cell Activation
18:08

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Published on: December 31, 2007

How T lymphocytes recognize lipid antigens.

Gennaro De Libero1, Lucia Mori

  • 1Experimental Immunology, Department of Research, University Hospital, University of Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland. gennaro.delibero@unibas.ch

FEBS Letters
|September 5, 2006
PubMed
Summary

T lymphocytes recognize lipid antigens via CD1 molecules. New research uncovers novel immune system mechanisms for sensing and responding to these lipid antigens during infections and autoimmune conditions.

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • T lymphocyte recognition of lipid antigens is a known immunological process.
  • Lipid antigens are presented to T cells by CD1 antigen-presenting molecules.
  • Both microbial and self-lipids can stimulate T lymphocytes, impacting immune responses.

Purpose of the Study:

  • To explore the mechanisms by which the immune system processes and presents lipid antigens.
  • To identify novel strategies employed by the immune system for lipid antigen sensing.
  • To understand the role of lipid antigen presentation in infections and autoimmune diseases.

Main Methods:

  • Review of recent studies on lipid antigen presentation.
  • Analysis of immune system strategies for lipid solubilization, internalization, processing, and loading onto CD1 molecules.
  • Investigation of newly discovered mechanisms of lipid sensing by T cells.

Main Results:

  • The immune system employs diverse strategies to handle lipid antigens for T cell recognition.
  • New mechanisms have been identified that enable the immune system to detect lipids as stimulatory antigens.
  • These findings enhance our understanding of T cell-mediated immunity involving lipid antigens.

Conclusions:

  • The field of lipid antigen presentation is rapidly evolving with new discoveries.
  • Understanding these mechanisms is crucial for developing therapies for infectious and autoimmune diseases.
  • The immune system possesses sophisticated ways to sense and respond to lipid antigens.