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A novel methodology for NETs visualization under light microscopy.

Antonio Muñiz-Buenrostro1, Alma Y Arce-Mendoza1, Edgar I Montes-Zapata1

  • 1Departamento de Inmunología, Facultad de Medicina, Universidad Autónoma de Nuevo León, Av. Gonzalitos #235 Col. Mitras Centro, C.P. 64460, Monterrey, Nuevo León, México.

Biochemistry and Biophysics Reports
|February 23, 2023
PubMed
Summary
This summary is machine-generated.

Neutrophil extracellular traps (NETs) can now be visualized using cost-effective light microscopy. This method aids in studying infection resolution and offers a new technique for global research accessibility.

Keywords:
NETsNeutrophilSafranin

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Neutrophils are key immune cells crucial for combating infections.
  • Neutrophil extracellular traps (NETs) are a defense mechanism used by neutrophils to trap and kill pathogens.
  • Current NETs visualization methods often rely on expensive fluorescence or electron microscopy.

Purpose of the Study:

  • To develop and validate a cost-effective method for visualizing NETs using light microscopy.
  • To provide an accessible alternative for NETs research in laboratories worldwide.
  • To evaluate the efficacy of safranin as a stain for NETs under light microscopy.

Main Methods:

  • Neutrophils were isolated and stimulated with phorbol 12-myristate 13-acetate (PMA) or *Staphylococcus aureus*.
  • NETs formation was induced and visualized using safranin staining with light microscopy.
  • NETs visualization was compared with DAPI staining under fluorescence microscopy.
  • Neutrophil purity, viability, and function were assessed.

Main Results:

  • Unstimulated neutrophils did not form NETs.
  • Stimulated neutrophils successfully formed NETs.
  • Safranin staining enabled clear visualization of NETs under light microscopy.
  • DAPI staining confirmed NETs formation under fluorescence microscopy.

Conclusions:

  • Light microscopy with safranin provides a viable and cost-effective method for visualizing NETs.
  • This technique complements existing advanced microscopy methods for NETs research.
  • The study enhances opportunities for NETs research globally by offering an accessible visualization approach.