title: Effects of Therapeutic Lifestyle Change diets high and low in dietary fish-derived FAs on lipoprotein metabolism in middle-aged and elderly subjects.
abstract: The effects of Therapeutic Lifestyle Change (TLC) diets, low and high in dietary fish, on apolipoprotein metabolism were examined. Subjects were provided with a Western diet for 6 weeks, followed by 24 weeks of either of two TLC diets (10/group). Apolipoprotein kinetics were determined in the fed state using stable isotope methods and compartmental modeling at the end of each phase. Only the high-fish diet decreased median triglyceride-rich lipoprotein (TRL) apoB-100 concentration (-23%), production rate (PR, -9%), and direct catabolism (-53%), and increased TRL-to-LDL apoB-100 conversion (+39%) as compared with the baseline diet (all P < 0.05). This diet also decreased TRL apoB-48 concentration (-24%), fractional catabolic rate (FCR, -20%), and PR (-50%) as compared with the baseline diet (all P < 0.05). The high-fish and low-fish diets decreased LDL apoB-100 concentration (-9%, -23%), increased LDL apoB-100 FCR (+44%, +48%), and decreased HDL apoA-I concentration (-15%, -14%) and PR (-11%, -12%) as compared with the baseline diet (all P < 0.05). On the high-fish diet, changes in TRL apoB-100 PR were negatively correlated with changes in plasma eicosapentaenoic and docosahexaenoic acids. In conclusion, the high-fish diet decreased TRL apoB-100 and TRL apoB-48 concentrations chiefly by decreasing their PR. Both diets decreased LDL apoB-100 concentration by increasing LDL apoB-100 FCR and decreased HDL apoA-I concentration by decreasing HDL apoA-I PR.
authors: Lipid Metabolism Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA.
authors: Esther M M
authors: EM
authors: Ooi
authors: Alice H
authors: AH
authors: Lichtenstein
authors: John S
authors: JS
authors: Millar
authors: Margaret R
authors: MR
authors: Diffenderfer
authors: Stefania
authors: S
authors: Lamon-Fava
authors: Helen
authors: H
authors: Rasmussen
authors: Francine K
authors: FK
authors: Welty
authors: P Hugh R
authors: PH
authors: Barrett
authors: Ernst J
authors: EJ
authors: Schaefer
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D004032:Diet; D004042:Dietary Fats, Unsaturated / Q000032:analysis* / Q000097:blood; D005215:Fasting; D015525:Fatty Acids, Omega-3 / Q000494:pharmacology; D005260:Female; D005399:Fishes; D006801:Humans; D007700:Kinetics; D008019:Life Style; D008074:Lipoproteins / Q000378:metabolism*; D008297:Male; D008875:Middle Aged
chemical_list: D004042:Dietary Fats, Unsaturated; D015525:Fatty Acids, Omega-3; D008074:Lipoproteins