title: Protein carbonyl content roughly reflects the unsaturation of lipids in muscle but not in other tissues of stroke-prone spontaneously hypertensive strain (SHRSP) rats fed different fats and oils.
abstract: We examined in vivo the effect of dietary fats and oils with different peroxidizability on protein carbonyl content, the presumed index of free radical-mediated protein oxidation. For 15.6 months, SHRSP (stroke-prone spontaneously hypertensive strain) rats were fed a diet supplemented with lard, safflower oil, perilla oil or fish oil/soybean oil, the peroxidizability of which increases in this order. The peroxidizability of tissue lipids was positively correlated with the protein carbonyl content in skeletal muscle, but not in the brain, heart or liver. The protein carbonyl content in the lard group was higher in the brain and liver compared to the other dietary groups. These results contradict the concept that long-term feeding of easily autoxidizable fatty acids allows the accumulation of lipid peroxides to accelerate the development of the free radical diseases, and suggest that tissue protein carbonyl content is not a simple reflection of autoxidizability-related lipid peroxidation but is also influenced by other biochemical processes.
authors.affiliation: Department of Biological Chemistry, Faculty of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Sato
authors.forename: M Z
authors.initials: MZ
authors.lastname: Huang
authors.forename: S
authors.initials: S
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Okuyama
authors.forename: H
authors.initials: H
authors.lastname: Nakamoto
authors.forename: Z
authors.initials: Z
authors.lastname: Radák
authors.forename: S
authors.initials: S
authors.lastname: Goto
mesh_terms: D000375:Aging / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000378:metabolism; D004041:Dietary Fats / Q000494:pharmacology*; D005223:Fats / Q000737:chemistry; D005224:Fats, Unsaturated / Q000737:chemistry / Q000494:pharmacology*; D005227:Fatty Acids / Q000032:analysis; D005260:Female; D005395:Fish Oils / Q000494:pharmacology; D015227:Lipid Peroxidation; D008099:Liver / Q000378:metabolism; D009124:Muscle Proteins / Q000378:metabolism*; D018482:Muscle, Skeletal / Q000737:chemistry / Q000378:metabolism*; D009206:Myocardium / Q000378:metabolism; D010084:Oxidation-Reduction; D010938:Plant Oils / Q000494:pharmacology; D051381:Rats; D011918:Rats, Inbred SHR; D014018:Tissue Distribution; D014810:Vitamin E / Q000378:metabolism
chemical_list: D004041:Dietary Fats; D005223:Fats; D005224:Fats, Unsaturated; D005227:Fatty Acids; D005395:Fish Oils; D009124:Muscle Proteins; D010938:Plant Oils; D014810:Vitamin E