Autophagy and bacterial infectious diseases

Jae Min Yuk1, Tamotsu Yoshimori, Eun Kyeong Jo

  • 1Department of Microbiology, Chungnam National University School of Medicine, Daejeon 301-747, Korea.

Summary

Autophagy, a cellular recycling process, acts as an innate defense against bacterial and viral infections. This review explores how antibacterial autophagy (xenophagy) combats various bacterial pathogens.

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Autophagy01:27

Autophagy

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Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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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...
Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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Endocytosis
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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

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Autophagic Cell Death01:18

Autophagic 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
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Lysogenic Cycle of Bacteriophages00:43

Lysogenic Cycle of Bacteriophages

In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...