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Related Concept Videos

Surface Membrane Barriers01:18

Surface Membrane Barriers

The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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Confocal and Super-Resolution Imaging of Polarized Intracellular Trafficking and Secretion of Basement Membrane Proteins During Drosophila Oogenesis
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Diverse microbial interactions with the basement membrane barrier.

Lennert Steukers1, Sarah Glorieux, Annelies P Vandekerckhove

  • 1Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium. lennert.steukers@ugent.be

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Summary

Pathogens must breach the basement membrane (BM) to invade hosts. Microorganisms evolve diverse strategies, including independent mechanisms or hijacking host cells, to cross this critical biological barrier.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Pathogenesis

Background:

  • Microorganisms encounter numerous barriers during host invasion.
  • The basement membrane (BM) is a critical physical barrier underlying epithelia and endothelia.
  • Crossing the BM is essential for pathogens to reach deeper tissues and spread.

Purpose of the Study:

  • To summarize the diverse mechanisms employed by microorganisms to breach the basement membrane.
  • To highlight the importance of the BM as a barrier in host-pathogen interactions.

Main Methods:

  • Review of existing literature on microbial invasion strategies.
  • Analysis of pathogen-host interactions at the basement membrane level.

Main Results:

  • Pathogens utilize independent mechanisms to degrade or penetrate the BM.
  • Some pathogens hijack motile host cells (leukocytes, dendritic cells) to traverse the BM.
  • Oncogenic microorganisms may induce host cell metastasis to facilitate BM penetration.

Conclusions:

  • Successful host invasion by microorganisms often requires breaching the basement membrane.
  • Pathogens have evolved a variety of sophisticated strategies to overcome the BM barrier.
  • Understanding these mechanisms is crucial for developing anti-infective strategies.