title: Effect of dietary supplementation of astaxanthin by Phaffia rhodozyma on lipid peroxidation, drug metabolism and some immunological variables in male broiler chicks fed on diets with or without oxidised fat.
abstract: 1. Effects of dietary supplementation of astaxanthin (Ax) provided from Phaffia rhodozyma on lipid peroxidation, hepatic drug metabolism, antibody titres to sheep red blood cells (SRBC) and splenocyte proliferation to mitogens were determined in male broiler chicks. 2. Chicks, one week old, were given diets with or without oxidised fat (0 or 3.7 meq of peroxide value (POV)/kg diet) and/or Ax (0 or 100 mg/kg diet) for 14 d, ad libitum. 3. Lipid peroxidation, estimated by 2-thiobarbituric acid reactants values in liver, spleen, heart, plasma and hepatic microsomes, were increased by feeding a diet containing oxidised fat (P<0.05) but were not affected by Ax feeding. 4. Cytochrome P-450 contents in hepatic microsome tended to be increased by feeding Ax. 5. Anti-SRBC titre was not affected by oxidised fat or Ax feeding, while plasma immunogloblin (Ig) G concentration was increased by Ax feeding but was not affected by oxidised fat feeding. 6. When chicks were fed on the diet without oxidised fat, Ax enhanced splenocyte proliferation stimulated by both concanavalin A and pokeweed mitogen, while in chicks fed on a diet containing oxidised fat, Ax reduced the proliferation (P<0.01 for Ax and oxidised fat interaction). 7. The results indicated that dietary supplementation of Ax from Phaffia rhodozyma had an impact on T cell proliferation and Ig G production as a part of acquired immunity, but was not effective in preventing lipid peroxidation in male broiler chicks.
authors.affiliation: Laboratory of Animal Nutrition, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Takimoto
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.forename: Y
authors.initials: Y
authors.lastname: Akiba
mesh_terms: D000818:Animals; D002645:Chickens / Q000276:immunology / Q000378:metabolism*; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism; D015786:Cytochromes b5 / Q000378:metabolism; D004041:Dietary Fats / Q000008:administration & dosage* / Q000378:metabolism; D019587:Dietary Supplements; D007074:Immunoglobulin G / Q000097:blood; D015227:Lipid Peroxidation / Q000187:drug effects; D008099:Liver / Q000201:enzymology / Q000378:metabolism*; D008297:Male; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D024341:Xanthophylls / Q000008:administration & dosage / Q000378:metabolism
chemical_list: D004041:Dietary Fats; D007074:Immunoglobulin G; D017392:Thiobarbituric Acid Reactive Substances; D024341:Xanthophylls; C005948:astaxanthine; D015786:Cytochromes b5; D003577:Cytochrome P-450 Enzyme System