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Direct Single-Molecule Detection of mRNA-LNP Drugs in Blood
Risako Furukawa1, Hajime Shinoda2, Teruaki Tozaki1
1Genetic Analysis Department, Laboratory of Racing Chemistry, Utsunomiya 320-0851, Tochigi, Japan.
Analytical Chemistry
|December 22, 2025
Summary
A new direct-SATORI platform detects mRNA-lipid nanoparticles (LNPs) in blood at the single-molecule level. This rapid, amplification-free method aids in monitoring potential mRNA doping agents for enhanced sports integrity.
Area of Science:
- Biotechnology
- Molecular Biology
- Analytical Chemistry
Background:
- Messenger RNA (mRNA) therapeutics, often delivered via lipid nanoparticles (LNPs), show therapeutic potential but raise concerns about misuse, such as in sports doping.
- Existing detection methods for mRNA-based agents may lack the sensitivity or speed required for effective antidoping surveillance.
Purpose of the Study:
- To develop and validate a fully automated, amplification-free platform for direct detection of mRNA-LNPs in biological samples.
- To establish a sensitive and rapid detection system for potential mRNA doping agents, specifically targeting erythropoietin-encoding mRNA.
Main Methods:
- Integration of CRISPR-Cas13a, magnetic bead-based RNA enrichment, and microchamber technology into the direct-SATORI platform.
- Direct detection of unmodified and N1-methylpseudouridine (m 1 Ψ)-modified mRNA encoding erythropoietin in human and equine plasma.
- In vivo validation of the platform's performance in horses following administration of mRNA agents.
Main Results:
- The direct-SATORI platform achieved single-molecule level detection with limits of detection as low as 0.4 fM for unmodified mRNA.
- Detection was completed within approximately 10 minutes, demonstrating high sensitivity and speed.
- In vivo studies in horses showed successful detection of mRNA post-administration, with signal clearance within 48 hours.
Conclusions:
- The direct-SATORI platform offers a rapid, sensitive, and practical solution for detecting mRNA-based doping agents directly from blood.
- This technology has significant implications for enhancing antidoping surveillance and regulatory enforcement in sports.
- The platform's cross-species compatibility and single-molecule sensitivity make it a valuable tool for monitoring emerging therapeutic and potentially illicit substances.
