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Quantification of Methylenecyclopropyl Compounds and Acyl Conjugates by UPLC-MS/MS in the Study of the Biochemical Effects of the Ingestion of Canned Ackee (Blighia sapida) and Lychee (Litchi chinensis).
Journal of Agricultural and Food Chemistry 2017 March 30
Consumption of ackee (Blighia sapida) and lychee (Litchi chinensis) fruit has led to severe poisoning. Considering their expanded agricultural production, toxicological evaluation has become important. Therefore, the biochemical effects of eating 1 g/kg canned ackee, containing 99.2 μmol/kg hypoglycin A, and 5 g/kg canned lychee, containing 1.3 μmol/kg hypoglycin A, were quantified in a self-experiment. Using ultra-high-performance liquid chromatography/mass spectrometry, hypoglycin A, methylenecyclopropylacetyl-glycine, and methylenecyclopropylformyl-glycine, as well as the respective carnitine conjugates, were found in urine after ingesting ackee. Hypoglycin A and its glycine derivative were also present in urine after eating lychee. Excretion of physiological acyl conjugates was significantly increased in the ackee experiment. Ingestion of ackee led to up to 15.1 nmol/L methylenecyclopropylacetyl-glycine and traces of methylenecyclopropylformyl-carnitine in the serum. These compounds were not found in the serum after eating lychee. Hypoglycin A accumulated in the serum in both experiments.
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