Evolution of Cell-Type-Specific RNA Aptamers Via Live Cell-Based SELEX

Area of Science:

• Biotechnology
• Molecular Biology
• Genomics

Background:

• Live cell-based SELEX is a powerful method for aptamer discovery against cell-surface targets.
• It is particularly useful for targets that are difficult to express or purify in vitro.
• This approach allows for the selection of aptamers that recognize native protein conformations.

Purpose of the Study:

• To describe the evolution of cell-type-specific RNA aptamers targeting the human CCR5.
• To demonstrate the utility of live cell-based SELEX for identifying aptamers against specific cell surface proteins.
• To combine SELEX with high-throughput sequencing and bioinformatics for aptamer discovery.

Main Methods:

• Live cell-based Systematic Evolution of Ligand EXponential enrichment (SELEX) was employed.
• High-throughput sequencing (HTS) was used for aptamer identification and characterization.
• Bioinformatics analysis was performed to refine aptamer selection and specificity.

Main Results:

• Cell-type-specific RNA aptamers targeting human CCR5 were successfully evolved.
• The study demonstrated the feasibility of using live cell-based SELEX for complex targets.
• Integration of HTS and bioinformatics enhanced the efficiency of aptamer selection.

Conclusions:

• Live cell-based SELEX is an effective strategy for aptamer selection against cell-surface targets, including challenging proteins.
• The developed aptamers can be specific for cell types expressing CCR5.
• This integrated approach provides a robust platform for aptamer discovery in various biological applications.