title: Genotoxicity testing of a Hoodia gordonii extract.
abstract: Hoodia gordonii extract consists of a mixture of steroid glycosides, fatty acids, plant sterols and alcohols. As part of the overall safety assessment H. gordonii extract was assessed for genotoxicity in two assays in vitro: a bacterial mutation assay; and a gene mutation assay using mouse lymphoma cells. H. gordonii extract showed no evidence of genotoxic activity in either of these assays. In addition, H. gordonii extract was assessed for mutagenic activity in a bone marrow micronucleus (MN) assay in the mouse, with 400mg/kg selected as the high-dose group, based on observations in a dose-range-finding study. The group mean frequencies of micronucleated polychromatic erythrocytes of treated animals were similar to those of the vehicle control group, indicating H. gordonii extract to be non-genotoxic under the conditions of this test. All assays were performed in compliance with the Good Laboratory Practice Regulations and in accordance with standard guidelines for genotoxicity tests. H. gordonii extract was shown to be non-genotoxic in 3 independent assays (a bacterial mutation test, a gene mutation assay using mouse lymphoma cells and a bone marrow micronucleus assay in the mouse).
authors.affiliation: Safety and Environmental Assurance Centre (SEAC), Unilever, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK. andrew.scott@unilever.com
authors.forename: A D
authors.initials: AD
authors.lastname: Scott
authors.forename: A
authors.initials: A
authors.lastname: Orsi
authors.forename: C
authors.initials: C
authors.lastname: Ward
authors.forename: R
authors.initials: R
authors.lastname: Bradford
mesh_terms: D000818:Animals; D029062:Apocynaceae / Q000737:chemistry*; D001067:Appetite Depressants / Q000737:chemistry / Q000145:classification / Q000633:toxicity*; D001854:Bone Marrow Cells / Q000187:drug effects / Q000473:pathology; D045744:Cell Line, Tumor; D019587:Dietary Supplements; D005260:Female; D007940:Leukemia L5178; D008223:Lymphoma / Q000188:drug therapy / Q000235:genetics; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D048629:Micronuclei, Chromosome-Defective / Q000139:chemically induced; D015162:Micronucleus Tests; D009152:Mutagenicity Tests / Q000379:methods*; D009153:Mutagens / Q000737:chemistry / Q000145:classification / Q000633:toxicity*; D009154:Mutation / Q000187:drug effects; D010936:Plant Extracts / Q000737:chemistry / Q000145:classification / Q000633:toxicity*; D012486:Salmonella typhimurium / Q000187:drug effects / Q000235:genetics
chemical_list: D001067:Appetite Depressants; D009153:Mutagens; D010936:Plant Extracts