Project description:Our aim was to evaluate the potential of gene expression profiling in blood in a human intervention study investigating the effect of two breakfasts with different macronutrient content on hormonal regulation of satiety. As dietary protein appears to be more satiating than dietary carbohydrate, we tested the differential effect of a high protein and a high carbohydrate breakfast on satiety.
Project description:We assessed the effect of dietary glycemic load on miRNA expression in a sample of healthy, premenopausal women participating in a 12 month intervention designed to lower dietary glycemic load. Comparing post-intervention to baseline miRNA expression data of 14 participants receiving the active intervention.
Project description:Here we show that a specific diet in which dietary protein content has been replaced with a defined-amino acid formula enriched with BCAA, has a remarkable effect in treating heart failure (HF). In particular, we demonstrate that our dietary intervention has a theraputic relevance in the setting of preestablished disease, providing a critical rationale for further development of dietary interventions for HF.
Project description:We assessed the effect of dietary glycemic load on miRNA expression in a sample of healthy, premenopausal women participating in a 12 month intervention designed to lower dietary glycemic load.
Project description:OBJECTIVE Diet intervention in obese adults is the first strategy to induce weight loss and to improve insulin sensitivity. We hypothesized that improvements in insulin sensitivity after weight loss from a short-term dietary intervention tracks with alterations in expression of metabolic genes and abundance of specific lipid species. RESEARCH DESIGN AND METHODS Eight obese, insulin resistant, non-diabetic adults were recruited to participate in a three-week low calorie diet intervention study (1000 kcal/day). Fasting blood samples and vastus lateralis skeletal muscle biopsies were obtained before and after the dietary intervention. Clinical chemistry and measures of insulin sensitivity were determined. Unbiased microarray gene expression and targeted lipidomic analysis of skeletal muscle was performed. RESULTS Body weight was reduced, insulin sensitivity (HOMA-IR) was enhanced, and serum insulin concentration and blood lipid (triglyceride, cholesterol, LDL and HDL) levels were improved after dietary intervention. Gene set enrichment analysis of skeletal muscle revealed that oxidative phosphorylation and inflammatory processes were among the most enriched KEGG-pathways identified after dietary intervention. mRNA expression of PDK4 and MLYCD increased, while SCD decreased in skeletal muscle after dietary intervention. Dietary intervention altered the intramuscular lipid profile of skeletal muscle, with changes in content of phosphatidylcholine and triglyceride species among the pronounced. CONCLUSIONS Short-term diet intervention and weight loss in obese adults alters metabolic gene expression and reduces specific phosphatidylcholine and triglyceride species in skeletal muscle, concomitant with improvements in clinical outcomes and enhanced insulin sensitivity.
