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Tocopherol distribution in serum lipoproteins with respect to red blood cell tocopherol levels in children
1Department of Pediatrics, Osaka Medical College, Takatsuki, Japan.
Insights
High-density lipoprotein (HDL) tocopherol in children closely correlates with red blood cell (RBC) tocopherol. However, no significant relationship was found between RBC tocopherol and low-density lipoprotein (LDL) or very-low-density lipoprotein (VLDL) tocopherol levels.
Area of Science:
- Nutritional Biochemistry
- Lipid Metabolism
- Pediatric Health
Background:
- Tocopherol (Vitamin E) is a crucial lipid-soluble antioxidant.
- Understanding tocopherol distribution in lipoproteins is vital for assessing antioxidant status.
- Previous research has not fully elucidated tocopherol's relationship with red blood cell levels in children.
Purpose of the Study:
- To investigate the relationship between lipoprotein tocopherol levels and red blood cell (RBC) tocopherol in healthy children.
- To examine potential age and sex differences in tocopherol distribution among lipoprotein fractions.
Main Methods:
- A novel technique was employed to separate individual lipoprotein fractions.
- Tocopherol levels were measured in lipoprotein fractions (HDL, LDL, VLDL) and RBCs from 81 healthy children.
- Analysis included assessment of total cholesterol, triglycerides, phospholipids, and total lipids.
Main Results:
- Tocopherol content in high-density lipoprotein (HDL) fractions showed a significant positive correlation with RBC tocopherol concentration.
- No significant correlations were observed between RBC tocopherol and tocopherol levels in low-density lipoprotein (LDL) or very-low-density lipoprotein (VLDL).
- No significant age or sex differences were found in tocopherol content across lipoprotein fractions or in lipid profiles.
Conclusions:
- HDL tocopherol is a reliable indicator of RBC tocopherol status in children.
- LDL and VLDL tocopherol levels do not reflect RBC tocopherol concentration in this pediatric cohort.
- This study provides insights into tocopherol kinetics and antioxidant distribution in pediatric populations.
Abstract:
The relation of lipoprotein tocopherol levels to red blood cell (RBC) tocopherol was investigated in 81 healthy children, comprising 44 males and 37 females, using a new technique for separation of individual lipoprotein fractions. 1. In children there were no age and sex differences in tocopherol contents among individual lipoprotein fractions. The tocopherol content of high density lipoprotein (HDL) was slightly higher than that of low density lipoprotein (LDL), but this difference was not statistically significant. 2. The tocopherol content of HDL fractions was closely correlated with RBC tocopherol concentration, but there was no relationship in tocopherol levels between RBC and LDL and between RBC and very low density lipoprotein (VLDL). 3. There were no age and sex differences in contents of total cholesterol (T-ch), triglycerides (TG), phospholipids (PL), total lipids, HDL-cholesterol, LDL or VLDL in children.