Development of a metabonomic approach based on LC-ESI-HRMS measurements for profiling of metabolic changes induced by recombinant equine growth hormone in horse urine |
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Authors: | Fanny Kieken Gaud Pinel Jean-Philippe Antignac Fabrice Monteau Anne Christelle Paris Marie-Agnès Popot Yves Bonnaire Bruno Le Bizec |
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Institution: | (1) Laboratoire d’Etude des Résidus et Contaminants dans les Aliments (LABERCA), USC INRA 2013, Ecole Nationale Vétérinaire de Nantes (ENV), BP 50707, 44307 Nantes cedex 3, France;(2) LCH, Laboratoire des Courses Hippiques, 15 rue de Paradis, 91 370 Verrières-le-Buisson, France |
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Abstract: | Despite the worldwide existing regulation banning the use of the recombinant equine growth hormone (reGH) as growth promoter,
it is suspected to be used in horseracing to improve performances. Various analytical methods previously developed to screen
for its misuse have encountered some limitations in terms of detection timeframes, in particular during the first days following
reGH administration. A novel strategy involving the characterization of global metabolomic fingerprints in urine samples of
non-treated and reGH-treated horses by liquid chromatography–electrospray–high-resolution mass spectrometry (LC-ESI-HRMS)
is described and assessed in this paper in order to develop a new screening tool for growth hormone abuse in horseracing.
The strategy involves a limited sample preparation of the urine samples and the use of appropriate software for data processing
and analysis. As preliminary work, reproducibility of both sample preparation and mass spectrometry (MS) measurements was
evaluated in order to demonstrate the reliability of the method. Application of the developed protocol on two horses demonstrated
the suitability of the developed strategy and preliminary results showed significant modifications of the metabolome after
treatment with reGH.
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Keywords: | Recombinant equine growth hormone Metabolomic Fingerprints Chemometrics Urine LC-ESI-HRMS |
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