Inflammation, oxidative stress, and obesity

Area of Science:

• Endocrinology
• Metabolic Syndrome
• Cardiovascular Health

Background:

• Obesity is a chronic disease characterized by excessive body fat accumulation.
• Adipose tissue produces bioactive adipokines, including inflammatory Interleukin-6 (IL-6) and weight-regulating leptin.
• Adipokines contribute to oxidative stress (OS) by inducing reactive oxygen species (ROS) production.

Purpose of the Study:

• To explore the mechanisms by which obesity generates oxidative stress.
• To investigate the link between adipose tissue, adipokines, and systemic OS.
• To understand how obesity-induced OS impacts antioxidant capacity and endothelial function.

Main Methods:

• Review of mechanisms linking obesity to OS, including fatty acid oxidation and mitochondrial function.
• Analysis of adipokine roles in ROS generation and their impact on antioxidant enzymes.
• Examination of the consequences of OS on endothelial function and atherosclerotic disease development.

Main Results:

• Adipose tissue is an independent source of systemic OS due to adipokine-secreted ROS.
• Obesity involves ROS generation via fatty acid oxidation and mitochondrial oxygen over-consumption.
• Increased adipose tissue correlates with diminished activity of antioxidant enzymes like superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx).

Conclusions:

• Obesity-induced oxidative stress, driven by adipokines and metabolic alterations, significantly reduces antioxidant capacity.
• This imbalance promotes endothelial dysfunction, characterized by reduced nitric oxide (NO) bioavailability.
• The resulting pro-oxidative and pro-atherosclerotic environment contributes to the development of cardiovascular diseases.