Selective Delivery to Cardiac Muscle Cells Using Cell-Specific Aptamers.

Area of Science:

• Biotechnology
• Molecular Biology
• Cell Biology

Background:

• Systematic Evolution of Ligands by Exponential Enrichment (SELEX) is used to develop aptamers for specific targets.
• In vivo SELEX allows aptamer selection within a natural biological environment, enhancing therapeutic potential.
• Current in vivo SELEX methods do not specifically select for aptamers targeting particular cell types within a tissue.

Purpose of the Study:

• To modify in vivo SELEX to achieve cell-type-specific aptamer selection.
• To develop aptamers that can be selectively delivered to cardiomyocytes.
• To explore the potential of these aptamers as targeted drug delivery vehicles for cardiac diseases.

Main Methods:

• Adaptation of the in vivo SELEX methodology.
• Incorporation of a cell enrichment step during the selection process.
• In vivo administration and tracking of RNA aptamers.

Main Results:

• The modified in vivo SELEX successfully enriched aptamers.
• The addition of a cell enrichment step directed RNA aptamers to cardiomyocytes.
• Cardiomyocyte-selective aptamers were identified over other cardiac cell types.

Conclusions:

• The modified in vivo SELEX method enables the selection of cell-type-specific aptamers.
• RNA aptamers can be directed to cardiomyocytes using this approach.
• These cardiomyocyte-selective aptamers show promise as targeted drug delivery agents for conditions like DMD cardiomyopathy.