Tocopherols and polyunsaturated fatty acids in human tissues.

Area of Science:

• Biochemistry
• Nutritional Science
• Human Physiology

Background:

• Historical data from 1949 and 1958 provide baseline vitamin E concentrations.
• Changes in tocopherol levels may reflect dietary or environmental shifts.
• Understanding vitamin E status is crucial for overall health.

Purpose of the Study:

• To analyze alpha- and gamma-tocopherol and fatty acid content in human tissues.
• To compare current tocopherol levels with historical data.
• To investigate the relationship between polyunsaturated fatty acids and alpha-tocopherol in evaluating vitamin E status.

Main Methods:

• Analysis of five tissues from six adult subjects (three sudden death, three cancer victims).
• Quantification of alpha- and gamma-tocopherols and fatty acids.
• Comparison of results with published data from 1949 and 1958.

Main Results:

• Alpha-tocopherol concentrations in liver, muscle, and adipose tissue were similar to historical levels.
• Heart and lung tissues showed significantly higher alpha-tocopherol concentrations (2x and 3x, respectively).
• Gamma-tocopherol content was considerably higher across all tissues compared to historical data.
• Tissues from cancer patients exhibited comparable alpha-tocopherol levels to normal subjects.
• Linoleic acid exceeded 15% of total fatty acids in adipose tissue of three subjects.

Conclusions:

• Human tissue tocopherol levels have changed over time, with notable increases in gamma-tocopherol and specific increases in alpha-tocopherol in heart and lung.
• Cancer does not appear to lower alpha-tocopherol levels in tissues.
• The ratio of polyunsaturated fatty acids to alpha-tocopherol may serve as an indicator of vitamin E status.