1. Optimization, validation, and comparison of a rapid method for the quantification of insulin‐like growth factor 1 in serum using liquid chromatography–high‐resolution mass spectrometry
- Author
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Jisoo Park, Oh Seung Kwon, Changmin Sung, Minyoung Kim, Yoondam Seo, Hophil Min, and Hwa Jeong Lee
- Subjects
medicine.medical_treatment ,Pharmaceutical Science ,Common method ,Mass spectrometry ,01 natural sciences ,Mass Spectrometry ,Analytical Chemistry ,03 medical and health sciences ,Insulin-like growth factor ,0302 clinical medicine ,Limit of Detection ,medicine ,Humans ,Environmental Chemistry ,030216 legal & forensic medicine ,Insulin-Like Growth Factor I ,Chromatography, High Pressure Liquid ,Spectroscopy ,Doping in Sports ,Detection limit ,Reproducibility ,Immunoradiometric assay ,Chromatography ,Chemistry ,010401 analytical chemistry ,Linearity ,Method of analysis ,0104 chemical sciences ,Substance Abuse Detection - Abstract
Human insulin-like growth factor 1 (IGF-I) is the primary mediator of the effects of the growth hormone (GH). Therefore, it has been used as a biomarker to detect the abuse of GH in sports. The measurement of IGF-I relies on mass-based and immunological approaches to analysis. Among the mass-based analysis methods, liquid chromatography-mass spectrometry (LC-MS) has a number of functional advantages. LC-MS measurements based on the quantification of IGF-I, according to trypsin digestion, are used in the most common method of analyzing doping. However, this method is time-consuming and subject to experimental variability. In this study, we optimized a rapid method for detecting IGF-I without the trypsin digestion step. This method of analysis uses an ultra-centrifugal filter and an LC-HRMS through narrow-range mass scan method. To verify the validity of this method, eight categories of validation testing were applied with the following results: linearity, R2 > 0.99; limit of detection, 15 ng/ml; limit of quantification, 20 ng/ml; accuracy, >99%; recovery rate, >95%; carryover
- Published
- 2020