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General Information

Document type
  • Peer-reviewed journal article
Study Type
  • Feeding study
  • Toxicology
GE organism
  • potato
GE trait
  • disease resistance
Country
  • UK

Results

Safety for consumption
  • no effect

Prima facie evidence that a phytocystatin for transgenic plant resistance to nematodes is not a toxic risk in the human diet Open Access

Atkinson, HJ; Johnston, KA; Robbins, M
The Journal of nutrition. 2004 February. 134(2):431-434

Link to full text (open access, freely available)

PMID: 14747684 ISSN: 1541-6100

Abstract

A protein-engineered rice cystatin (OcIDeltaD86) provides transgenic, partial crop resistance to plant nematodes. This study determined whether its oral uptake has adverse effects on male Sprague-Dawley rats when they are administered by oral gavage 0.1-10 mg OcIDeltaD86/kg body weight daily for 28 d. Body weight and water and food intakes were unaltered for most of the study. The only significant changes in fresh weight of nine organs were for the liver (4% decrease; P < 0.05) and the empty cecum (14% increase; P < 0.05) at the two lowest doses and the highest dose of OcIDeltaD86, respectively. No abnormalities in either organ were detected by histochemistry. There were no changes in the urine or in hematological variables measured, and blood serum revealed no dose-dependent responses for any of 17 variables measured. OcIDeltaD86 was degraded by boiling with a 50% loss of its inhibition of papain after 9.2 +/- 8.0 min. It also showed >95% loss of such inhibition after 15 s in simulated gastric fluid. The results suggest that the no effect level (NOEL) for OcIDeltaD86 is >10 mg/(kg. d). This provides a range of dietary exposure >200-2000 fold depending upon the promoter used to control its expression in potato.

Keywords

toxicity; cystatin; OcIΔD86; anti-nematode; biopesticide

Funding

Funding source
  • Scottish Executive of Rural Affairs
  • Department for International Development, UK
Funding country
  • UK
Funding type
  • government

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Cite this study

MLA

Atkinson, HJ, KA Johnston, M Robbins. "Prima facie evidence that a phytocystatin for transgenic plant resistance to nematodes is not a toxic risk in the human diet." The Journal of nutrition 134.2 (2004): 431-434. Web. 19 Nov. 2017.

APA

Atkinson, HJ., Johnston, KA., & Robbins, M. (2004). Prima facie evidence that a phytocystatin for transgenic plant resistance to nematodes is not a toxic risk in the human diet. The Journal of nutrition, 134(2), 431-434.

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