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Updated: May 12, 2025

Using Nanoplasmon-Enhanced Scattering and Low-Magnification Microscope Imaging to Quantify Tumor-Derived Exosomes

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[Advances in exosome-targeting aptamer-screening techniques].

Li-Ting Zheng¹, Ge Yang², Feng Qu¹

¹School of Life Science, Beijing Institute of Technology, Beijing 100081, China.

Se Pu = Chinese Journal of Chromatography

|May 7, 2025

Summary

This summary is machine-generated.

Nucleic acid aptamers offer a promising tool for detecting exosomes, which are key biomarkers for early disease diagnosis. This review details aptamer selection methods to overcome challenges in identifying specific exosomes for clinical applications.

Keywords:

aptamer exosome systematic evolution of ligands by exponential enrichment (SELEX)

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Area of Science:

Biotechnology
Molecular Biology
Nanotechnology

Background:

Exosomes are vital for intercellular communication and disease biomarker discovery.
Developing sensitive methods for exosome detection is crucial for early diagnosis and treatment.
Nucleic acid aptamers are highly specific binding molecules with therapeutic and diagnostic potential.

Purpose of the Study:

To review aptamer selection strategies and screening techniques for exosome detection.
To discuss the advantages and limitations of various exosome-aptamer screening methods.
To highlight challenges and future directions in exosome aptamer development.

Main Methods:

Systematic evolution of ligands by exponential enrichment (SELEX) for aptamer generation.
Detailed review of five key SELEX-based screening techniques: magnetic bead-SELEX, microfluidic-SELEX, nitrocellulose-SELEX, cell-SELEX, and capillary electrophoresis-SELEX.
Analysis of separation principles, benefits, drawbacks, and applications of each screening method.

Main Results:

Aptamers demonstrate significant potential for exosome targeting in diagnostics and therapeutics.
Five distinct SELEX-based methods offer varied approaches to aptamer screening against exosomes.
Challenges remain in aptamer selection due to exosome complexity and heterogeneity.

Conclusions:

Efficient aptamer screening techniques are essential for advancing exosome-based diagnostics.
Further research into novel screening methods is needed to overcome exosome heterogeneity.
Optimized aptamer selection will enhance exosome detection for clinical applications.