Lipid profiling in serum from apolipoprotein E-knock out mice fed with different diets and its application to the study of the regulatory effect on lipid metabolism

Atherosclerosis is a chronic disease associated with oxidative stress and inflammatory activation and is the main underlying trigger for cardiovascular disease. There are many cardiovascular health products in the market; in order to evaluate the effect of these products, in this paper, a novel lipid profiling platform was established using the shot-gun mass spectrum method for the analysis of free fatty acid and phospholipids, and the high performance liquid chromatography coupled with mass spectroscopy method for the analysis of lipid mediators and triacylglycerol, respectively, in serum from male apolipoprotein E-knock out mice after different diet interventions. Changes in the four lipids above, and pathways and regulation of lipid metabolism in mice from different groups were further investigated. The result showed that all cardiovascular health products showed some certain potential to alleviate atherogenesis and ameliorate inflammation; among them, lemon apple cider vinegar drink and seal oil could significantly decrease triacylglycerol in mouse serum. The establishment of this lipidome profiling platform helps to better understand the metabolism regulation and intervention mechanism of different cardiovascular health products in chronic diseases, such as atherogenesis. This platform could be applied to other cardiovascular health products and provide reliable lipid profiling data for their potential effect.