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An automated, high-throughput method for targeted quantification of intact insulin and its therapeutic analogs in human serum or plasma coupling mass spectrometric immunoassay with high resolution and accurate mass detection (MSIA-HR/AM)

Research output: Contribution to journalArticle

Scott Peterman, Eric E. Niederkofler, David A. Phillips, Bryan Krastins, Urban A. Kiernan, Kemmons A. Tubbs, Dobrin Nedelkov, Amol Prakash, Maryann S. Vogelsang, Tara Schoeder, Lewis Couchman, David R Taylor, Caje Moniz, Gouri Vadali, Gregory Byram, Mary F. Lopez

Original languageEnglish
Pages (from-to)1445-1456
Number of pages12
Issue number12
PublishedJun 2014

King's Authors


The detection and quantification of insulin and its therapeutic analogs is important for medical, sports doping, and forensic applications. Synthetic variants contain slight sequence variations to affect bioavailability. To reduce sample handling bias, a universal extraction method is required for simultaneous extraction of endogenous and variant insulins with subsequent targeted quantification by LC-MS. A mass spectrometric immunoassay (MSIA), a multiplexed assay for intact insulin and its analogues that couples immunoenrichment with high resolution and accurate mass (HR/AM) spectrometric detection across the clinical range is presented in this report. The assay is sensitive, selective, semi-automated and can potentially be applied to detect new insulin isoforms allowing their further incorporation into second or third generation assays.

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