New Method Detects 11 Prohibited Peptides in Urine for Anti-Doping

Sports drug testing is crucial for maintaining fair competition, but detecting certain prohibited peptides used for doping remains a significant challenge due to their small size, low concentrations, and complex biological matrices. Current analytical methods often lack the necessary sensitivity or comprehensive scope to cover a wide range of these illicit substances effectively. This study addresses the critical need for a robust, highly sensitive, and expandable screening assay to identify multiple small prohibited peptides in urine samples to enhance anti-doping efforts.

The developed method demonstrated excellent analytical performance for the 11 target peptides. Linearity was established across a broad range of 0-500 pg/mL, indicating consistent and accurate detection capabilities over varying concentrations. Recovery rates for the peptides ranged from 45-95%, showcasing efficient extraction from complex urine matrices, which is crucial for reliable analysis. Precision was notably high, with values of <20% at a concentration of 100 pg/mL, ensuring highly reproducible and reliable quantitative results. The most critical finding was the very low limits of detection (LODs), ranging from 2-10 pg/mL, which allows for the identification of these prohibited substances even at minute concentrations, significantly improving the chances of detecting doping. This high sensitivity is paramount for anti-doping efforts, as these potent peptides are often used in extremely small, hard-to-detect quantities.