title: Evaluation of the toxicity of mastic gum with 13 weeks dietary administration to F344 rats.
abstract: Dietary toxicity of mastic gum, a natural food additive, was studied in male and female F344 rats fed 0%, 0.22%, 0.67% and 2% levels mixed into powdered basal diet for 13 weeks. No mortality or obvious clinical signs were observed in any of the animals throughout the experimental period. Body weights were significantly reduced in the high dose-treated group from week 2 to the end of the experiment in males, and at weeks 8 and 13 in females. There were increased absolute and relative liver weights in a dose-related manner or limited to the high dose group males or females, along with changes in hematological parameters, including increased WBC and platelet in high dose males. Altered serum biochemistry parameters included increases of total proteins, albumin, and total cholesterol in both sexes, and gamma-GTP in females only. However, macroscopic examination at necropsy revealed no gross lesions, and microscopic examination also revealed no treatment-related findings in any organs examined. As dietary treatment of mastic gum for 13 weeks in the present study caused decreased body weights at the high dose, especially in males, and increased liver weights in a dose-related manner in both genders without any morphological findings, it is concluded that the administration of it has a no observed adverse effect level (NOAEL) of 0.67% in the diet.
authors.affiliation: Department of Pathology, Osaka City University Medical School, 1-4-3 Asahi-Machi, Osaka, Japan.
authors.forename: Jin Seok
authors.initials: JS
authors.lastname: Kang
authors.forename: Hideki
authors.initials: H
authors.lastname: Wanibuchi
authors.forename: Elsayed I
authors.initials: EI
authors.lastname: Salim
authors.forename: Anna
authors.initials: A
authors.lastname: Kinoshita
authors.forename: Shoji
authors.initials: S
authors.lastname: Fukushima
mesh_terms: D000284:Administration, Oral; D000818:Animals; D004305:Dose-Response Relationship, Drug; D005260:Female; D005503:Food Additives / Q000008:administration & dosage / Q000633:toxicity*; D008297:Male; D000069997:Mastic Resin; D008517:Phytotherapy; D027927:Pistacia; D051381:Rats; D011916:Rats, Inbred F344; D012116:Resins, Plant / Q000008:administration & dosage / Q000633:toxicity*; D018675:Toxicity Tests
chemical_list: D005503:Food Additives; D000069997:Mastic Resin; D012116:Resins, Plant