[Vitamin E disturbances in chronic renal failure]

Area of Science:

• Biochemistry
• Nephrology
• Cardiovascular Science

Context:

• Chronic renal insufficiency (CRI) is associated with altered vitamin E (alpha-tocopherol) plasma levels and distribution.
• Patients with CRI exhibit abnormal vitamin E distribution within lipoproteins, particularly lower levels in low-density lipoprotein (LDL).
• Elevated malondialdehyde (MDA) in patient LDL suggests increased lipid peroxidation.

Purpose:

• To investigate the relationship between vitamin E status, LDL susceptibility to oxidation, and atherosclerosis in CRI patients.
• To evaluate the impact of vitamin E supplementation on the progression of aortic calcification in CRI patients.

Summary:

• CRI patients show abnormal vitamin E distribution, with reduced vitamin E and increased malondialdehyde (MDA) in LDL compared to controls.
• Patient LDL exhibits enhanced susceptibility to in vitro oxidation, correlating with accelerated atherosclerosis.
• A small uncontrolled trial indicated that vitamin E treatment suppressed aortic calcification progression in CRI patients.

Impact:

• Findings suggest vitamin E's potential role in mitigating accelerated atherosclerosis in CRI.
• Highlights the importance of assessing lipoprotein oxidation and vitamin E status in renal insufficiency.
• Provides preliminary evidence for vitamin E as a therapeutic strategy against cardiovascular complications in CRI.