Development of a sphingosylphosphorylcholine detection system using RNA aptamers

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• Sphingosylphosphorylcholine (SPC) is a lysosphingolipid with diverse biological roles, including spasmogenic, mitogenic, and inflammatory activities.
• Current quantification methods like LC/MS/MS are complex and not cost-effective for routine monitoring.
• There is a need for simpler, more accessible methods for SPC detection and analysis.

Purpose of the Study:

• To generate high-affinity RNA aptamers that specifically bind to SPC.
• To develop a cost-effective and sensitive enzyme-linked aptamer assay for SPC quantification.
• To differentiate SPC from structurally similar molecules like sphingosine 1-phosphate (S1P).

Main Methods:

• Systematic Evolution of Ligands by EXponential enrichment (SELEX) was employed to select RNA aptamers against SPC.
• A minimized SPC aptamer was designed and integrated into an enzyme-linked aptamer assay (ELAA).
• The assay's specificity was validated by testing its ability to distinguish SPC from S1P.

Main Results:

• High-affinity RNA aptamers that specifically bind to SPC were successfully generated.
• An enzyme-linked aptamer assay system was developed, demonstrating high sensitivity and specificity.
• The assay effectively distinguished SPC from the structurally related sphingosine 1-phosphate (S1P).

Conclusions:

• The developed RNA aptamers represent a novel and valuable tool for SPC detection.
• The enzyme-linked aptamer assay offers a cost-effective and practical alternative for routine SPC monitoring.
• These aptamers hold potential for advancing aptamer-based medical diagnostics and understanding SPC's biological functions.