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Human subcutaneous adipose tissue shows site-specific differences in fatty acid composition
S D Phinney1, J S Stern, K E Burke
1Department of Internal Medicine, University of California at Davis.
The American Journal of Clinical Nutrition
|November 1, 1994
Summary
Adipose tissue fatty acid composition varies by body location, with abdominal fat having more saturated fats and outer thigh fat having more polyunsaturated fats. These differences may be influenced by temperature and affect triglyceride melting points.
Area of Science:
- Biochemistry
- Human Physiology
- Lipid Metabolism
Background:
- Adipose tissue exhibits regional variations in composition.
- Fatty acid profiles are crucial for tissue function and metabolic health.
Purpose of the Study:
- To investigate anatomical variations in adipose tissue fatty acid composition.
- To determine if these variations are influenced by factors like temperature.
Main Methods:
- Adipose tissue samples were collected from six women via liposuction at two time points.
- Fatty acids were quantified using gas chromatography.
- Bilateral samples from abdomen, inner thigh, and outer thigh were analyzed.
Main Results:
- Significant differences in saturated and unsaturated fatty acids were observed between abdominal and outer thigh adipose tissue.
- Abdominal fat showed higher levels of saturated fatty acids (e.g., 16:0, 18:0) and lower levels of monounsaturated fatty acids (e.g., 18:1 omega 9).
- Outer thigh fat exhibited higher polyunsaturated fatty acids (e.g., 18:2 omega 6, 20:4 omega 6) and lower saturated fatty acids.
Conclusions:
- Anatomical location significantly influences adipose tissue fatty acid composition.
- Observed differences suggest a role for selective uptake and potential in situ modification of fatty acids.
- Temperature may play a role in determining these site-specific variations.