title: Detection of recombinant human EPO administered to horses using MAIIA lateral flow isoform test.
abstract: Doping of horses with recombinant human erythropoietin (rHuEPO) to illegally enhance their endurance capacity in horseracing has been reported during the last years. This leads to increased blood viscosity which can result in sudden death and is of concern for the horse welfare. Additionally, the horse can start production of rHuEPO antibodies, which cross-reacts with endogenous equine EPO and can lead to severe anaemia and even death. In this study, a novel micro-chromatographic method, EPO WGA MAIIA, has been tested for the capability in plasma and urine samples to detect administration of erythropoiesis-stimulating agents, like the rHuEPO glycoprotein varieties Eprex and Aranesp, to horses. After administration of 40 IU Eprex kg(-1) day(-1) to seven horses during 6 days, the presence of Eprex in horse plasma was detected up to 2-5 days after last injection. In urine samples collected from two horses, Eprex was detected up to 3 days. A single injection of Aranesp (0.39 μg/kg) was detected up to 9 days in plasma and up to 8 days, the last day of testing, in the urine sample. The LC-FAIMS-MS/MS system, with 1 day reporting time, confirmed the presence of Eprex up to 1 day after last injection for six out of seven horses and the presence of Aranesp up to 5 days after last injection in plasma samples. The MAIIA system showed to be a promising tool with high sensitivity and extremely short reporting time (1 h).
authors.affiliation: Department of Chemistry-Biomedical Center, Uppsala University, Box 599, 751 24 Uppsala, Sweden. maria.lonnberg@kemi.uu.se
authors.forename: Maria
authors.initials: M
authors.lastname: Lönnberg
authors.forename: Ulf
authors.initials: U
authors.lastname: Bondesson
authors.forename: Florence
authors.initials: F
authors.lastname: Cormant
authors.forename: Patrice
authors.initials: P
authors.lastname: Garcia
authors.forename: Yves
authors.initials: Y
authors.lastname: Bonnaire
authors.forename: Jan
authors.initials: J
authors.lastname: Carlsson
authors.forename: Marie-Agnes
authors.initials: MA
authors.lastname: Popot
authors.forename: Niclas
authors.initials: N
authors.lastname: Rollborn
authors.forename: Kristina
authors.initials: K
authors.lastname: Råsbo
authors.forename: Ludovic
authors.initials: L
authors.lastname: Bailly-Chouriberry
mesh_terms: D000818:Animals; D002846:Chromatography, Affinity; D003429:Cross Reactions; D004921:Erythropoietin / Q000008:administration & dosage / Q000032:analysis* / Q000276:immunology; D006736:Horses; D006801:Humans; D007124:Immunoenzyme Techniques; D011994:Recombinant Proteins / Q000008:administration & dosage / Q000032:analysis / Q000276:immunology; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry
chemical_list: D011994:Recombinant Proteins; D004921:Erythropoietin