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- W3048409245 abstract "The prevalence of non-Alcoholic Fatty Liver Disease (NAFLD) has now reached epidemic proportions, but the role of gene-lifestyle interactions in its pathogenesis remains poorly understood. While evidence for an inverse association between odd-chain length fatty acids (OCFA) and cardiometabolic diseases, suggests a possible link between OCFAs and NAFLD, little is known about the impact of diet, gut microbiota and peroxisomal biogenesis on the metabolism of OCFAs. We hypothesized that suboptimal diet, altered gut microbiota and peroxisomal biogenesis could promote the development of NAFLD by impairing the metabolism of OCFAs. This thesis aimed to understand the effect of dietary fat/protein on the genetic and metabolic regulation of lipids and OCFAs in relation to NAFLD, using a high fat diet (HFD) model, well established in the literature for inducing obesity and insulin resistance in mice within 4 weeks, and a low protein diet (LPD) model, known to promote NAFLD. Under specific pathogen free or normal husbandry conditions, a HFD reduced serum OCFA in mice after 4 and 12 weeks of feeding, and down-regulated the activity of several key enzymes in fatty acid metabolism (desaturases, lyase, elongase). Liver histology also showed deposition of lipid droplets and higher expression of peroxin 14 protein in HFD fed mice (Chapter 3). The characterisation of gut microbiota revealed an alteration in propionate-producing bacteria, Lachnospiraceae and Clostridiales, in HFD fed mice (Chapter 4). Mice fed with carbohydrate rich-LPD for 7 weeks resulted in lower levels of serum OCFA, increased CD36 mRNA and peroxin 14 expressions. However, OCFA did not change in the reduced and quality carbohydrate-LPD after 8 weeks (Chapter 5). In conclusion, these findings provide evidence that HFD and carbohydrate rich-LPD reduced OCFA via changes in gut microbiota and peroxisomal biogenesis in the liver and increases our understanding of how suboptimal diets contributes to NAFLD." @default.
- W3048409245 created "2020-08-18" @default.
- W3048409245 creator A5055761012 @default.
- W3048409245 date "2020-06-30" @default.
- W3048409245 modified "2023-09-28" @default.
- W3048409245 title "The role of diet and gut microbiota in lipid metabolism: implications for health outcomes using a mouse model." @default.
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