title: Folates from metabolically engineered rice: a long-term study in rats.
abstract: METHODS
  The biological impact of folates from folate rice, a metabolically engineered (biofortified) rice line, rich in folates, was investigated. Its consumption may be helpful to fight folate deficiency. Our objective was to investigate the potential of folate rice to supply the organism with folates and evaluate its biological effectiveness using a rat model.
  
  
  RESULTS
  Five groups of 12 Wistar rats were monitored during a 7/12-wk depletion/repletion trial. Animals receiving folate-free diet (0 μg/rat/day) and those additionally receiving wild-type rice (on average 0.11 μg/rat/day) suffered from decreased hematocrit and lower folate concentrations in both plasma and RBCs. This resulted in serious morbidity and even lethality during the trial. In contrast, all animals receiving a daily supplement of folate rice or folic acid fortified rice (on average 3.00 μg/rat/day and 3.12 μg/rat/day, respectively) and those receiving a positive control diet (11.4 to 25.0 μg/rat/day), survived. In these groups, the hematocrit normalized, plasma and RBC folate concentrations increased and pronounced hyperhomocysteinemia was countered.
  
  
  CONCLUSIONS
  Using an animal model, we demonstrated that biofortified folate rice is a valuable source of dietary folate, as evidenced by folate determination in plasma and RBCs, the alleviation of anemia and counteraction of pronounced hyperhomocysteinemia.
authors.affiliation: Laboratory of Toxicology, Ghent University, Ottergemsesteenweg, Ghent, Belgium.
authors.forename: Filip
authors.initials: F
authors.lastname: Kiekens
authors.forename: Dieter
authors.initials: D
authors.lastname: Blancquaert
authors.forename: Lindsey
authors.initials: L
authors.lastname: Devisscher
authors.forename: Jeroen
authors.initials: J
authors.lastname: Van Daele
authors.forename: Veronique V
authors.initials: VV
authors.lastname: Stove
authors.forename: Joris R
authors.initials: JR
authors.lastname: Delanghe
authors.forename: Dominique
authors.initials: D
authors.lastname: Van Der Straeten
authors.forename: Willy E
authors.initials: WE
authors.lastname: Lambert
authors.forename: Christophe P
authors.initials: CP
authors.lastname: Stove
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004912:Erythrocytes / Q000187:drug effects / Q000378:metabolism; D005260:Female; D005492:Folic Acid / Q000097:blood / Q000494:pharmacology*; D005527:Food, Fortified; D006400:Hematocrit; D006710:Homocysteine / Q000097:blood; D008137:Longitudinal Studies; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism; D030821:Plants, Genetically Modified / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D017208:Rats, Wistar; D014805:Vitamin B 12 / Q000097:blood
chemical_list: D006710:Homocysteine; D005492:Folic Acid; D014805:Vitamin B 12
keywords: Bioactivity; Biofortification; Folate; Murine model; Rice