Toxicokinetics of Hydrolyzed Fumonisin B(1) after Single Oral or Intravenous Bolus to Broiler Chickens Fed a Control or a Fumonisins-Contaminated Diet

The toxicokinetics (TK) of hydrolyzed fumonisin B(1) (HFB(1)) were evaluated in 16 broiler chickens after being fed either a control or a fumonisins-contaminated diet (10.8 mg fumonisin B(1), 3.3 mg B(2) and 1.5 mg B(3)/kg feed) for two weeks, followed by a single oral (PO) or intravenous (IV) dose of 1.25 mg/kg bodyweight (BW) of HFB(1). Fumonisin B(1) (FB(1)), its partially hydrolyzed metabolites pHFB(1a) and pHFB(1b), and fully hydrolyzed metabolite HFB(1), were determined in chicken plasma using a validated ultra-performance liquid chromatography–tandem mass spectrometry method. None of the broiler chicken showed clinical symptoms of fumonisins (FBs) or HFB(1) toxicity during the trial, nor was an aberration in body weight observed between the animals fed the FBs-contaminated diet and those fed the control diet. HFB(1) was shown to follow a two-compartmental pharmacokinetic model with first order elimination in broiler chickens after IV administration. Toxicokinetic parameters of HFB(1) demonstrated a total body clearance of 16.39 L/kg·h and an intercompartmental flow of 8.34 L/kg·h. Low levels of FB(1) and traces of pHFB(1b) were found in plasma of chickens fed the FBs-contaminated diet. Due to plasma concentrations being under the limit of quantification (LOQ) after oral administration of HFB(1), no toxicokinetic modelling could be performed in broiler chickens after oral administration of HFB(1). Moreover, no phase II metabolites, nor N-acyl-metabolites of HFB(1) could be detected in this study.