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Related Experiment Video

Updated: May 4, 2026

Low-Cost Automated Flight Intercept Trap for the Temporal Sub-Sampling of Flying Insects Attracted to Artificial Light at Night

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Entrapment exploited.

Jos A G van Strijp¹, Suzan H M Rooijakkers¹

¹Medical Microbiology, UMC Utrecht, Heidelberglaan 100, 3584CX Utrecht, The Netherlands.

Trends in Microbiology

|January 7, 2014

Summary

Staphylococcus aureus degrades neutrophil extracellular traps (NETs) into a compound that induces macrophage apoptosis. This mechanism enhances bacterial survival within abscesses.

Area of Science:

Immunology
Microbiology
Biochemistry

Background:

Neutrophil extracellular traps (NETs) are crucial in host defense against bacterial infections.
Staphylococcus aureus is a common pathogen that can cause abscesses.
Understanding bacterial evasion mechanisms is vital for developing new therapies.

Purpose of the Study:

To elucidate the mechanism by which Staphylococcus aureus evades the host immune response.
To identify the specific bacterial factors involved in immune evasion.
To investigate the impact of bacterial activity on macrophage function.

Main Methods:

Analysis of Staphylococcus aureus culture supernatants.
DNA degradation assays.
Macrophage apoptosis assays.

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Identification of degradation products using mass spectrometry.

Main Results:

Staphylococcus aureus secretes an enzyme that degrades NET DNA.
The degradation product is identified as 2'-deoxy-adenosine.
2'-deoxy-adenosine induces apoptosis in incoming macrophages.
This process facilitates Staphylococcus aureus survival in abscesses.

Conclusions:

Staphylococcus aureus actively dismantles NETs to suppress the immune response.
The bacterium utilizes host-derived molecules to induce immune cell death.
This novel immune evasion strategy highlights a critical interaction between S. aureus and macrophages.