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

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.