Netosis
Netosis - Related Videos
14:17
Neutrophil Extracellular Traps: How to Generate and Visualize Them
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Cited by 296 •
2010
Neutrophil Extracellular Traps (NETs) are an important innate immune mechanism to fight pathogenic bacteria, fungi and parasites. Here we describe methods to isolate neutrophil granulocytes from human blood and to activate them to form NETs. We present preparation techniques to visualize NETs in light and electron microscopy.
06:45
A Simple Fluorescence Assay for Quantification of Canine Neutrophil Extracellular Trap Release
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Cited by 8 •
2016
Neutrophil extracellular traps (NETs) are networks of DNA, histones and neutrophil proteins. Although a component of the innate immune response, NETs are implicated in autoimmunity and thrombosis. This protocol describes a simple method for canine neutrophil isolation and quantification of NETs using a microplate fluorescence assay.
09:43
Simplified Human Neutrophil Extracellular Traps (NETs) Isolation and Handling
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Cited by 153 •
2015
In the following protocol, we describe a very simple way to isolate Neutrophil Extracellular traps (NETs) from human whole blood using readily available reagents. We then demonstrate how the isolated NETs can be used in an in vitro adhesion assay with cancer cells.
FAQs
Chromatin decondensation is a central structural change in netosis. As the normally compact chromatin loosens, it can combine with antimicrobial proteins originating from neutrophil granules. This mixture forms the extracellular material that helps retain invading microbes. Consequently, regulation of chromatin state influences whether neutrophils can generate effective traps during an immune response.
Reactive oxygen species and peptidylarginine deiminase 4, or PAD4, can contribute to the molecular events that produce NETs. Their involvement links neutrophil activation with chromatin decondensation and trap formation. Examining these factors helps researchers identify regulatory points that may influence how strongly neutrophils respond during infection or inflammatory disease.
Antimicrobial proteins from neutrophil granules become associated with the decondensed chromatin released during netosis. This combination gives the extracellular structures both a web-like framework and antimicrobial activity, supporting microbial capture and elimination. The outcome depends not only on chromatin release but also on the incorporation of these neutrophil-derived proteins.
NET production can shift from protective to damaging when the response is excessive or poorly controlled. Abundant extracellular traps may injure surrounding tissues and sustain inflammation rather than limiting infection. The same dysregulation is also associated with thrombosis and autoimmune disease, making control of NET formation important for balancing antimicrobial defense with tissue protection.
Netosis provides a framework for studying how neutrophils respond to bacterial, fungal, and other infections. Researchers can examine whether trap formation supports microbial capture and elimination or whether an excessive response worsens inflammatory injury. This perspective helps connect neutrophil activity with infection outcomes instead of evaluating microbial clearance separately from host tissue effects.
Analyzing molecular regulation can clarify why NET responses differ between protective and harmful states. Attention to chromatin decondensation, reactive oxygen species, PAD4, and neutrophil granule proteins can reveal mechanisms that shape trap production. These findings may explain infection outcomes and identify regulatory processes suitable for investigation as therapeutic targets.
The connection arises from the dual consequences of extracellular trap production. NETs can support defense by helping capture invading microbes, yet excessive or poorly regulated formation can promote tissue damage, inflammation, thrombosis, or autoimmune disease. In immunology research, this makes netosis relevant to both antimicrobial protection and the pathological effects of dysregulated host responses.