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Obesity, plasma lipids and polymorphonuclear (PMN) granulocyte functions
Abstract:
20 obese subjects were compared with 20 controls with normal weight regarding their polymorphonuclear (PMN) granulocyte functions, and plasma lipids. The obese subjects showed a significantly decreased PMN bactericidal capacity, and increased PMN adherence. No differences were found in their mean PMN chemotaxis and opsonic capacity of plasma. The values of plasma triglycerides and free fatty acids were higher in the obese, while plasma cholesterol and phospholipids corresponded to the control values. The changes in granulocyte function did not correlate significantly to plasma lipid levels or to body weight and Broca's index in either group. --It is concluded that changes in granulocyte function occur in obesity, but are not related to plasma lipids or degree of overweight.
Insights
Obesity impairs polymorphonuclear (PMN) granulocyte bactericidal capacity and increases adherence. These immune changes in obesity do not correlate with plasma lipids or body weight.
Area of Science:
- Immunology
- Metabolic Disorders
- Cellular Biology
Background:
- Obesity is a complex metabolic disorder associated with increased inflammation.
- Polymorphonuclear (PMN) granulocytes play a crucial role in innate immunity.
- Understanding immune function in obesity is vital for managing associated health risks.
Purpose of the Study:
- To investigate polymorphonuclear (PMN) granulocyte functions in obese individuals compared to normal-weight controls.
- To examine the relationship between PMN function, plasma lipid profiles, and body weight parameters.
Main Methods:
- Comparison of PMN granulocyte functions (bactericidal capacity, adherence, chemotaxis, opsonic capacity) between 20 obese subjects and 20 normal-weight controls.
- Analysis of plasma lipid levels, including triglycerides, free fatty acids, cholesterol, and phospholipids.
- Correlation analysis between PMN function parameters, plasma lipids, body weight, and Broca's index.
Main Results:
- Obese subjects exhibited significantly decreased PMN bactericidal capacity and increased PMN adherence.
- No significant differences were observed in PMN chemotaxis or plasma opsonic capacity between groups.
- Obese individuals had higher plasma triglycerides and free fatty acids, but similar cholesterol and phospholipids compared to controls.
- Changes in PMN function did not significantly correlate with plasma lipid levels or degree of overweight.
Conclusions:
- Obesity is associated with specific alterations in PMN granulocyte function, notably reduced bactericidal capacity and increased adherence.
- These observed changes in granulocyte function in obesity are independent of plasma lipid levels and the degree of overweight.
- Further research is warranted to elucidate the mechanisms underlying these immune dysfunctions in obesity.