Evaluation of 30% DAS-444Ø6-6 soybean meal in a subchronic rat toxicity study

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Event DAS-444Ø6-6 soybean is genetically modified (GM) to provide tolerance to 2,4-diclorophenoxyacetic acid (2,4-D), glyphosate, and glufosinate herbicides through expression of the AAD-12, 2mEPSPS, and PAT proteins, respectively. DAS-444Ø6-6 soybeans were evaluated for safety in subchronic rat feeding studies. The results from two previous subchronic rat feeding studies evaluating diets formulated with 20% inclusion of DAS-444Ø6-6 soybean meal (the latter also containing DAS-444Ø6-6 derived hulls and oil) did not show any treatment-related adverse effects. In 2017, to comply with recent guidance from EFSA, a third 90-day rat feeding study was conducted with Sprague-Dawley rats (16/sex/group) with diets formulated either with 15% or 30% w/w of toasted DAS-444Ø6-6 soybean meal. DAS-444Ø6-6 soybean hulls and oil were also added to the transgenic test diets at 1% or 2% w/w and 1.35% or 2.7%, respectively, for the low- and high-dose groups. No toxicologically significant effects were observed under the conditions of this study.

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