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Updated: Aug 9, 2025

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
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Development and Assessment of Intracellular Infection Models for Staphylococcus aureus

Published on: January 17, 2025

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Staphylococcus aureus induces mitophagy to promote its survival within bovine mammary epithelial cells

Dianwen Xu1, Guiqiu Hu1, Jianchun Luo1

  • 1College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, China.

Veterinary Microbiology
|February 24, 2023
PubMed

Insights

Staphylococcus aureus triggers mitophagy, a cellular cleaning process, to survive inside bovine mammary epithelial cells. This occurs via the p38-PINK1-Parkin pathway, offering a potential therapeutic target.

Area of Science:

  • Cellular Biology
  • Microbiology
  • Immunology

Background:

  • Mitophagy is a crucial cellular process involved in clearing damaged mitochondria, particularly during pathogenic infections.
  • The specific role of mitophagy in Staphylococcus aureus (S.aureus) intracellular survival within bovine mammary epithelial cells (BMECs) and its molecular mediators are not well understood.

Purpose of the Study:

  • To investigate the role of mitophagy in S.aureus intracellular survival within BMECs.
  • To elucidate the molecular mechanisms by which S.aureus induces mitophagy.

Main Methods:

  • Utilized BMECs infected with S.aureus.
  • Analyzed mitophagy induction and its correlation with bacterial survival.
  • Investigated the involvement of the p38-PINK1-Parkin signaling pathway through molecular assays.

Main Results:

  • S.aureus infection induced complete mitophagy in BMECs, promoting bacterial survival.
  • Mechanistic studies revealed that S.aureus activates the p38-PINK1-Parkin signaling pathway to induce mitophagy.
  • This pathway activation is critical for S.aureus to enhance its intracellular persistence.

Conclusions:

  • S.aureus employs mitophagy as a survival strategy within BMECs by activating the p38-PINK1-Parkin pathway.
  • Understanding this mechanism provides insights into host-pathogen interactions.
  • This pathway represents a potential therapeutic target for combating S.aureus and other intracellular bacterial infections.
Keywords:
Bovine mammary epithelial cellsIntracellular infectionMitophagyP38-PINK1-ParkinStaphylococcus aureus

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