Enhanced Sensitivity of Cell Identification in Complex Environments Using Chirally Inverted L-DNA-Based Logic Devices

Area of Science:

• Biotechnology
• Molecular Biology
• Biomedical Engineering

Background:

• Accurate cell identification and isolation are vital for precision medicine.
• DNA aptamer logic devices offer efficient analysis of multiple cell surface markers.
• Natural DNA (D-DNA) degradation compromises device sensitivity and specificity, leading to inaccurate results.

Purpose of the Study:

• To develop highly stable and specific cell-surface logic devices for accurate cell identification and isolation.
• To overcome the limitations of D-DNA degradation in aptamer-based logic devices.
• To enhance the sensitivity and specificity of cell analysis using aptamer logic devices.

Main Methods:

• Design and development of dual- and triple-aptamer-based logic devices utilizing mirror-image L-DNA.
• L-DNA, a chiral molecule with high biostability, was employed as a substitute for D-DNA.
• Simultaneous analysis of multiple cell surface proteins was performed using the developed L-DNA devices.

Main Results:

• L-DNA probes achieved significantly higher sensitivities (98.7% and 70.5% for dual- and triple-aptamer devices, respectively) compared to D-DNA probes (27.9% and 0.1%) in FBS buffer.
• The L-DNA-based devices demonstrated superior specificity in target cell identification.
• The study highlighted the enhanced stability of L-DNA in complex biological environments.

Conclusions:

• L-DNA aptamer-based logic devices provide a robust and highly specific platform for cell identification and isolation.
• The high biostability of L-DNA overcomes the limitations of D-DNA degradation, improving diagnostic reliability.
• These advanced aptamer devices hold significant potential for applications in life sciences, biomedical engineering, and personalized medicine.