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Reduced Toxicity of Fumonisin B1 in Corn Grits by Single-Screw Extrusion

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Abstract:

Corn grits spiked with 30 μg/g fumonisin B1 and two batches of grits fermented with Fusarium verticillioides (batch 1 contained 33 μg/g, and batch 2 contained 48 μg/g fumonisin B1), which were extruded by a single-screw extruder with and without glucose (10%, dry weight basis) supplementation were fed to rats. Control groups were fed uncontaminated grits. Extrusion with glucose more effectively reduced fumonisin B1 concentrations of the grits (75 to 85%) than did extrusion alone (10 to 28%). With one exception, the fumonisin B1–spiked and fermented extrusion products caused moderately severe kidney lesions and reduced kidney weights, effects typically found in fumonisin-exposed rats. Lesions in rats fed the least contaminated grits (batch 1) after extrusion with 10% glucose were, however, significantly less severe and not accompanied by kidney weight changes. Therefore, extrusion with glucose supplementation is potentially useful for safely reducing the toxicity of fumonisins in corn-based products and studies to determine the optimal conditions for its use are warranted.

Document Type: Research Article

Affiliations: 1: Russell Research Center, U.S. Department of Agriculture, Agricultural Research Station, 950 College Station Road, Athens, Georgia 30605, USA 2: Department of Food Science and Technology, University of Nebraska, 143 Filley Hall, Lincoln, Nebraska 68583, USA 3: Department of Nutrition and Food Sciences, Texas Woman's University, P.O. Box 425888, Denton, Texas 76204, USA

Publication date: October 1, 2008

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    First published in 1937, the Journal of Food Protection®, is a refereed monthly publication. Each issue contains scientific research and authoritative review articles reporting on a variety of topics in food science pertaining to food safety and quality. The Journal is internationally recognized as the leading publication in the field of food microbiology with a readership exceeding 11,000 scientists from 70 countries. The Journal of Food Protection® is indexed in Index Medicus, Current Contents, BIOSIS, PubMed, Medline, and many others.

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