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Related Concept Videos

Autophagy01:27

Autophagy

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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,...
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Delivery Pathways to the Lysosome01:36

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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...
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Autophagic Cell Death01:18

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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.
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Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
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Phagocytosis of Apoptotic Cells01:17

Phagocytosis of Apoptotic Cells

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Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
Normal cells contain receptors that prevent them from being recognized...
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Intracellular Movement of Viruses and Bacteria01:10

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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Related Experiment Video

Updated: Dec 14, 2025

Use of Shigella flexneri to Study Autophagy-Cytoskeleton Interactions
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Use of Shigella flexneri to Study Autophagy-Cytoskeleton Interactions

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Autophagy and Bacterial Infection.

Yichuan Xiao1, Wei Cai2

  • 1Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China. ycxiao@sibs.ac.cn.

Advances in Experimental Medicine and Biology
|July 17, 2020
PubMed
Summary

Autophagy is crucial for fighting bacterial infections, but bacteria can evade it. Understanding these interactions reveals new pathogenic mechanisms and potential treatments for diseases like Salmonella and tuberculosis.

Keywords:
AutophagyBacterial infectionImmuneInteraction

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Related Experiment Videos

Last Updated: Dec 14, 2025

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Area of Science:

  • Microbiology
  • Immunology
  • Cell Biology

Background:

  • Bacterial infections affect various organs and tissues.
  • Autophagy is a key cellular process in both innate and adaptive immunity against bacterial pathogens.
  • Bacteria have evolved mechanisms to subvert or exploit autophagy for their survival.

Purpose of the Study:

  • To explore the intricate mechanisms of autophagy during bacterial infections.
  • To elucidate the interactions between bacterial virulence factors and host cell autophagy.
  • To identify novel therapeutic strategies for infectious diseases.

Main Methods:

  • Review of existing literature on autophagy and bacterial pathogenesis.
  • Analysis of molecular mechanisms employed by bacteria like Salmonella and Mycobacterium tuberculosis to interact with autophagy.
  • Discussion of cellular responses and immune evasion tactics.

Main Results:

  • Autophagy acts as a critical defense mechanism against bacterial invasion.
  • Bacterial pathogens can disrupt or hijack the autophagy pathway to promote intracellular survival and replication.
  • Specific bacterial virulence factors are implicated in modulating host autophagy.

Conclusions:

  • Understanding bacterial manipulation of autophagy is essential for deciphering pathogenesis.
  • Targeting the interplay between bacteria and autophagy offers promising avenues for novel anti-infective therapies.
  • Further research into these mechanisms can lead to innovative strategies for controlling infectious diseases.