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Related Concept Videos

Formation of Lipopolysaccharides01:19

Formation of Lipopolysaccharides

Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin, triggering...
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.
Lipid Absorption01:24

Lipid Absorption

Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
Receptor-mediated Endocytosis01:38

Receptor-mediated Endocytosis

Overview
Antigen Processing Pathways01:31

Antigen Processing Pathways

MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
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...

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Related Experiment Video

Updated: May 24, 2026

Antigenic Liposomes for Generation of Disease-specific Antibodies
10:31

Antigenic Liposomes for Generation of Disease-specific Antibodies

Published on: October 25, 2018

Novel insights into lipid antigen presentation.

Gennaro De Libero1, Lucia Mori

  • 1Singapore Immunology Network, A*STAR, Singapore 138648, Singapore. Gennaro_delibero@immunol.a-star.edu.sg

Trends in Immunology
|February 21, 2012
PubMed
Summary

T cells that recognize lipid antigens play key roles in immunity. This review details how CD1 molecules present these lipid antigens, advancing our understanding of lipid-specific immunity.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • T cells recognizing lipid antigens are abundant in blood and crucial for immune responses.
  • These T cells are involved in immunoregulation, tumor surveillance, and infection protection.

Purpose of the Study:

  • To review recent advancements in understanding lipid antigen presentation by CD1 molecules.
  • To explore the mechanisms of CD1 trafficking, lipid handling, and antigen loading.

Main Methods:

  • Review of recent studies on CD1 molecule structure and function.
  • Analysis of cellular mechanisms involved in lipid antigen processing and presentation.
  • Investigation of pathogen evasion strategies related to CD1-mediated immunity.

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

Published on: December 31, 2007

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Related Experiment Videos

Last Updated: May 24, 2026

Antigenic Liposomes for Generation of Disease-specific Antibodies
10:31

Antigenic Liposomes for Generation of Disease-specific Antibodies

Published on: October 25, 2018

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

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

Published on: December 31, 2007

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Main Results:

  • Detailed insights into CD1 trafficking, maturation, and lipid antigen loading.
  • Structural resolution of human CD1 molecules revealing unique functional features.
  • Elucidation of molecular mechanisms regulating CD1 expression and pathogen evasion tactics.

Conclusions:

  • Significant progress has been made in decoding lipid-specific immunity.
  • CD1-mediated lipid antigen recognition plays a vital immunological role.