Related Experiment Video
Updated: Jun 25, 2026
11:12
Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
Published on: April 11, 2019
Macroautophagy in immunity and tolerance
Monique Gannagé1, Christian Münz
1Viral Immunobiology, Institute of Experimental Immunology, University Hospital of Zürich, CH-8057 Zürich, Switzerland.
Traffic (Copenhagen, Denmark)
|February 5, 2009
Summary
Macroautophagy and proteasomal degradation are key cellular pathways. The immune system utilizes these pathways for pathogen clearance and self-tolerance, offering therapeutic targets for immune disorders and vaccine improvement.
Area of Science:
- Cell Biology
- Immunology
Background:
- Autophagy and proteasomal degradation are the primary cellular catabolic pathways.
- Macroautophagy degrades organelles and aggregates, while proteasomes handle soluble proteins.
- Both pathways are crucial for immune system function, degrading foreign substances and presenting pathogen fragments.
Purpose of the Study:
- To explore the role of macroautophagy in immune system tolerance and activation.
- To understand how macroautophagy selects self-structures for presentation.
- To discuss recent advances in macroautophagy's function in immunity.
Main Methods:
- Review of recent scientific literature on autophagy and immune responses.
- Analysis of macroautophagy's role in self-structure selection and presentation.
- Discussion of macroautophagy's involvement in innate and adaptive immunity.
Main Results:
- Macroautophagy selects self-structures for presentation on MHC class II molecules, inducing tolerance.
- Both proteasomal degradation and macroautophagy are involved in desensitizing the immune system.
- Macroautophagy plays a dual role in intracellular pathogen clearance and immune tolerance.
Conclusions:
- Understanding macroautophagy's specialized functions is vital for developing therapies against immunopathologies.
- Targeting macroautophagy can potentially improve vaccine efficacy.
- Macroautophagy is a critical metabolic process with significant implications for immune regulation.
Related Concept Videos
01:27Autophagy
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
01:22Cellular Injury V: Apoptosis and Autophagy
Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
01:36Delivery Pathways to the Lysosome
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
01:20Special 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,...
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,...
01:18Autophagic Cell Death
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
01:25Immune Surveillance by NK Cells and Phagocytes
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...