A Novel Capturing Method for Quantification of Extra-Cellular Nanovesicles.

Area of Science:

• Biotechnology
• Nanotechnology
• Cell Biology

Background:

• Extracellular vesicles (EVs) are vital for intercellular communication and are recognized as potential disease biomarkers.
• Accurate detection and quantification of nanoscale EVs are challenging due to their small size and limitations in current preparation methods.

Purpose of the Study:

• To develop an improved sample preparation method for Atomic Force Microscopy (AFM) to enhance extracellular vesicle (EV) detection.
• To increase the accuracy, sensitivity, and reproducibility of EV analysis using AFM.

Main Methods:

• A novel 3D capture method involving shaking a mica plate in an EV solution was employed for sample preparation.
• Atomic Force Microscopy (AFM) was utilized for particle detection and size analysis.
• Transmission electron microscopy (TEM) was used for correlative size data.

Main Results:

• The 3D capture method significantly improved the accuracy, sensitivity, and reproducibility of EV detection compared to conventional methods.
• The captured EVs predominantly ranged from 10 to 120 nm in size, consistent with TEM findings.
• The method demonstrated high adaptability for capturing other organic and inorganic nanoparticles.

Conclusions:

• The novel 3D capture sample preparation technique offers a superior approach for AFM-based detection and quantification of EVs.
• This method holds promise for advancing the use of EVs as diagnostic and prognostic biomarkers.
• The technique's versatility extends to the analysis of various nanoparticles.