Chromatographic-mass spectrometric analysis of peptidic analytes (2-10 kDa) in doping control urine samples.
This study presents a validated method for detecting prohibited peptides in doping control urine samples, which may improve testing efficiency.
Where it sits
this study against the rest of the cjc-1295 corpusSummary and findings
This study focuses on the chromatographic-mass spectrometric analysis of peptides with a molecular mass between 2 and 10 kDa in doping control urine samples. The method was validated for its use in detecting various prohibited peptides, including CJC-1295. The study demonstrates an efficient extraction process for these analytes from urine samples.
Abstract
Peptides with a molecular mass between 2 and 10 kDa that are prohibited in elite sports usually require dedicated sample preparation and mass spectrometric detection that commonly cannot be combined with other (lower molecular mass) substances. In most instances, the physicochemical differences are too significant to allow for a generic analytical procedure. A simplification of established and comparably complex analytical approaches is therefore desirable and has been accomplished in the context of this study. With urine samples representing still the most frequently collected doping control specimens, efficient extraction of peptidic analytes from this matrix was a major goal of this method, as demonstrated for the included compounds such as insulins (human, lispro, aspart, glulisine, tresiba, glargine metabolite, bovine insulin, porcine insulin), growth hormone-releasing hormones (sermorelin, CJC-1295, tesamorelin) incl. their respective metabolites, insulin-like-growth factors (long-R<sub>3</sub> -IGF-I, R<sub>3</sub> -IGF-I, des<sub>1-3</sub> -IGF-I), synacthen, gonadorelin and mechano growth factors (human MGF, MGF-Goldspink). Sample preparation and detection are controlled by five internal standards, covering all five included peptide drug categories. Nearly all requirements of the recent technical documents from the World Anti-Doping Agency (WADA) considering their minimum required performance levels (MRPL) are fulfilled, and the method was validated for its utilisation as initial testing procedure in doping controls. Finally, the approach was applied to authentic post-administration study urine samples (for insulins and gonadorelin) in order to provide proof of principle.
Background
The paper addresses the need for improved detection methods for peptide-based substances in doping control, an area of growing concern in sports. Previous studies have highlighted challenges in identifying small peptides due to their size and structural complexity. This study is significant as it explores advanced chromatographic-mass spectrometric techniques for analyzing peptides in urine samples.
Methods
Not reported in abstract.
Results
Not reported in abstract.
Interpretation
Not reported in abstract.
Key findings
- Not reported in abstract.
Limitations
- Not reported in abstract.