title: Approach to the determination of insulin-like-growth-factor-I (IGF-I) concentration in plasma by high-performance liquid chromatography-ion trap mass spectrometry: use of a deconvolution algorithm for the quantification of multiprotonated molecules in electrospray ionization.
abstract: The insulin-like-growth-factor-I (IGF-I) peptide is known to be a marker for growth hormone administration. The development of a quantification method by electrospray ionization mass spectrometry (ESI-MS) coupled with high-performance liquid chromatography (HPLC) is required. This paper describes a method to quantify IGF-I using the internal standard R3 IGF-I in its oxidized forms. A deconvolution software was used to quantify the set of multi-charged molecules recorded on an ESI ion trap mass spectrometer. The results (i.e., linearity, reproducibility and concentration range) were obtained on standard samples and the described LC-ESI-MS method should be applicable to biological samples.
authors.affiliation: LAB/FNCF, Châtenay-Malabry, France.
authors.forename: S
authors.initials: S
authors.lastname: Bobin
authors.forename: M A
authors.initials: MA
authors.lastname: Popot
authors.forename: Y
authors.initials: Y
authors.lastname: Bonnaire
authors.forename: J C
authors.initials: JC
authors.lastname: Tabet
mesh_terms: D000465:Algorithms; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods
chemical_list: D007334:Insulin-Like Growth Factor I