New LC-MS/MS Method Confirms CJC-1295 Abuse in Equine Plasma

CJC-1295 is a synthetic peptide that powerfully stimulates the pituitary gland to produce growth hormone (GH). It's designed to covalently bind to plasma proteins, like serum albumin, which significantly extends its half-life to over six days in humans after a single dose. However, this protein conjugation makes detecting CJC-1295 in blood extremely challenging due to its low abundance, high molecular weight, and diverse protein binding. This study addresses the critical need for a reliable and sensitive confirmatory method for detecting conjugated CJC-1295 in equine plasma samples for anti-doping purposes.

The developed method proved highly effective in confirming the presence of CJC-1295 in equine plasma. It demonstrated remarkable sensitivity, successfully identifying the peptide down to very low concentrations. This advanced technique provides a robust and reliable tool for anti-doping efforts. The method's ability to handle conjugated forms of the peptide is a significant breakthrough for detection. > The developed method successfully identified CJC-1295 at concentrations as low as 180 pg/mL in 1 mL of equine plasma, demonstrating exceptional sensitivity for a complex, protein-bound analyte. This represents a substantial improvement in the ability to confirm illicit use compared to previous screening methods.