Related Experiment Videos
Human obesity: from lipid abnormalities to lipid oxidation
L F Van Gaal1, A Zhang, M M Steijaert
1University Hospital Antwerp/Laboratory of Endocrinology, Department of Endocrinology, Clinical Nutrition and Metabolism, Faculty of Medicine, Wilrijk, Belgium.
Summary
Obesity accentuates atherosclerosis risk factors. This study found increased lipid oxidation in obese women, suggesting a role in atherogenesis beyond traditional risk factors.
Area of Science:
- Cardiovascular Research
- Metabolic Syndrome
- Lipid Metabolism
Background:
- Obesity exacerbates atherosclerotic disease risks like dyslipidemia and insulin resistance.
- Obesity involves lipid disturbances, including high cholesterol, triglycerides, and altered lipoprotein profiles.
- Existing risk factors do not fully explain atherogenesis in obese individuals.
Purpose of the Study:
- To investigate the in vitro oxidizability of lipoproteins in obese premenopausal women.
- To compare lipoprotein oxidation capacity between obese and non-obese subjects.
- To explore the role of lipid peroxidation in obesity-related atherosclerosis.
Main Methods:
- Assessed in vitro oxidizability of the non-HDL fraction in 21 obese and 18 age-matched non-obese women.
- Measured fluorescence and thiobarbituric acid reactive substances (TBARS) over incubation time.
- Quantified malondialdehyde (MDA) as an indicator of lipid peroxidation.
Main Results:
- TBARS formation increased linearly with lipid levels in both obese and non-obese groups.
- Lipoprotein oxidizability was evaluated in premenopausal women.
- Data suggests a correlation between lipid levels and oxidation.
Conclusions:
- Obesity is associated with dyslipidemia, a known risk factor for atherosclerosis.
- Lipid peroxidation, particularly of LDL and VLDL, plays a significant role in atherosclerosis pathogenesis.
- Further research is needed to fully elucidate lipoprotein oxidation in obese subjects.