title: Effect of Chlorella pyrenoidosa on fecal excretion and liver accumulation of polychlorinated dibenzo-p-dioxin in mice.
abstract: The effect of Chlorella pyrenoidosa on fecal excretion and liver accumulation of polychlorinated dibenzo-p-dioxin in C57BL/6N mice administered dioxin was examined. Mice were administered 2.2 microg of 1,2,3,4,7,8-hexachlorodibenzo-p-dioxin (H6CDD) dissolved in corn oil once after a period of acclimatization, after which they were fed either a basal diet, a 10% C. pyrenoidosa diet, or a 10% Spinach diet, for five weeks. Among mice fed the 10% C. pyrenoidosa diet, cumulative fecal excretion of H6CDD over the first week following administration was significantly greater (9.2-fold) than that observed among mice fed the basal diet. Moreover, excretion during the fifth week following administration of H6CDD was still significantly greater (3.1-fold) among mice fed the 10% C. pyrenoidosa diet than among mice fed the basal diet. Five weeks after administration of H6CDD, liver accumulation of H6CDD in mice fed the 10% C. pyrenoidosa diet was significantly less than that observed among mice fed either the basal diet and the Spinach diet (by 27.9% and 34.8%, respectively). These findings suggest that C. pyrenoidosa may be useful in inhibiting the absorption of dioxins via food and the reabsorption of dioxins stored already in the body in the intestinal tract, thus preventing accumulation of dioxins within the body.
authors.affiliation: Department of Bioresource Science, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan. htakekoshi@sunchlorella.co.jp
authors.forename: Hideo
authors.initials: H
authors.lastname: Takekoshi
authors.forename: Go
authors.initials: G
authors.lastname: Suzuki
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Chubachi
authors.forename: Masuo
authors.initials: M
authors.lastname: Nakano
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002708:Chlorella; D002849:Chromatography, Gas; D045424:Complex Mixtures / Q000494:pharmacology*; D019587:Dietary Supplements; D005243:Feces / Q000737:chemistry*; D007408:Intestinal Absorption / Q000187:drug effects*; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D000072317:Polychlorinated Dibenzodioxins / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000493:pharmacokinetics*; D018724:Spinacia oleracea
chemical_list: D002247:Carbon Isotopes; D045424:Complex Mixtures; D000072317:Polychlorinated Dibenzodioxins