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Extraction, Quantification, and Biological Availability of Fumonisin B1 Incorporated into the Oregon Test Diet and Fed to Rainbow Trout

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The purpose of this study was (i) to determine whether pure fumonisin B1 could be incorporated into, recovered, and detected by high-pressure liquid chromatographic analysis from the semipurified Oregon test diet (OTD) used in rainbow trout feeding studies, and (ii) to determine if the incorporated fumonisin B1 was biologically available using the change in free sphingoid bases in liver, kidney, and serum as a mechanism-based biomarker. The results indicate that fumonisin is not easily quantified in the OTD. Recoveries ranged from 12 to 81% of the calculated concentrations based on the fumonisin B1 added to the OTD. However, the fumonisin B1 in the OTD was readily absorbed and biologically active as evidenced by marked increases in free sphinganine in liver, kidney, and serum. The magnitude of the increase in free sphinganine at 100 ppm in the OTD was comparable to that known to be associated with liver toxicity in rats, pigs, and ponies.

Document Type: Research Article

Affiliations: 1: Toxicology and Mycotoxin Research Unit, R. B. Russell Agricultural Research Center, USDA/ARS, P.O. Box 5677, Athens, Georgia 30604, USA 2: Toxicology Program and Department of Food Science and Technology, Oregon State University, Corvallis, Oregon 97331, USA

Publication date: August 1, 1998

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