Paper-Based for Isolation of Extracellular Vesicles

Area of Science:

• Biotechnology
• Nanotechnology
• Analytical Chemistry

Background:

• Extracellular vesicles (EVs) are crucial biomarkers for disease diagnosis.
• Isolating and characterizing EVs from limited samples like human serum presents a significant challenge.
• Current methods for EV analysis can be time-consuming and require large sample volumes.

Purpose of the Study:

• To develop and validate a novel paper-based device for the efficient isolation and characterization of extracellular vesicle (EV) subpopulations.
• To demonstrate the utility of this device for analyzing EVs from small-volume human serum samples.
• To enable rapid, point-of-care assessment of EV characteristics.

Main Methods:

• Chemically functionalized paper-based devices were designed for capturing specific EV subpopulations.
• Scanning electron microscopy (SEM) was employed to analyze the morphology of captured EVs.
• Transcriptome analysis was used to assess the molecular content of isolated EVs.
• Paper-based enzyme-linked immunosorbent assays (pELISA) were utilized for quantifying the amount of captured EVs.

Main Results:

• The paper-based devices successfully isolated EV subpopulations from limited human serum volumes.
• SEM confirmed the morphology of the captured EVs.
• Transcriptome analysis provided insights into the molecular profiles of EV subpopulations.
• pELISA enabled a quantitative assessment of EV amount with a colorimetric readout.
• Analysis was achievable from as little as 10 μL of serum within 10 minutes.

Conclusions:

• Paper-based devices offer a rapid, sensitive, and cost-effective platform for EV isolation and characterization.
• This technology facilitates the analysis of EV subpopulations from minimal biological samples.
• The developed method holds promise for point-of-care diagnostics and biomarker discovery.