Cell Surface Parameters for Accessing Neutrophil Activation Level with Atomic Force Microscopy

Area of Science:

• Cell Biology
• Immunology
• Biophysics

Background:

• Neutrophils are crucial immune cells involved in inflammatory responses.
• Understanding neutrophil activation dynamics is key to studying immune function and disease.
• Cell surface topography and adhesion properties change during neutrophil activation.

Purpose of the Study:

• To investigate the topographical and adhesion changes on the neutrophil cell surface during activation.
• To identify key surface parameters that correlate with neutrophil activation time.
• To establish a method for estimating neutrophil activation using atomic force microscopy.

Main Methods:

• Utilized atomic force microscopy (AFM) to image neutrophil cell surface topography and adhesion.
• Employed confocal laser scanning microscopy to observe internal cellular reorganization.
• Analyzed cell surface parameters and their correlation with activation time.

Main Results:

• Significant neutrophil cell surface changes were observed within the first 30 minutes of activation.
• Surface granular structures were visible as early as 10 minutes post-activation via AFM.
• Three spatial surface parameters were identified that correlate with neutrophil activation time.

Conclusions:

• Neutrophil activation is a dynamic process with rapid cell surface alterations.
• AFM imaging provides valuable insights into neutrophil activation mechanisms.
• The identified surface parameters enable quantitative estimation of neutrophil activation degree.