Radical trapping in glycogen storage disease 1a.

Area of Science:

• Biochemistry
• Cardiovascular Science
• Metabolic Disorders

Background:

• Oxidative stress and lipid peroxidation in arterial walls are key factors in atherosclerosis.
• Glycogen storage disease type 1a (GSD1a) patients, despite hyperlipidemia, do not develop premature atherosclerosis.

Purpose of the Study:

• To investigate antioxidative defense and oxidative stress parameters in GSD1a patients.
• To compare these parameters with type 1 diabetes mellitus, familial hypercholesterolemia, and healthy controls.

Main Methods:

• Analysis of plasma and serum from GSD1a patients (n=17), type 1 diabetes (n=17), familial hypercholesterolemia (n=18), and controls (n=20).
• Measurement of total radical trapping antioxidant parameter (TRAP), individual antioxidants (sulfhydryl groups, uric acid, vitamins C and E, coenzyme Q10), lipid peroxidation markers, lipoprotein(a), and homocysteine.

Main Results:

• GSD1a patients demonstrated significantly elevated TRAP compared to all other groups (P<0.01).
• Elevated uric acid levels significantly contributed to the increased TRAP in GSD1a patients (P<0.05 vs. control).
• Lipoprotein(a) levels were significantly lower in the GSD1a group compared to the other three groups (P<0.05).

Conclusions:

• GSD1a patients possess enhanced plasma antioxidative capacity, potentially protecting against lipid peroxidation and premature atherosclerosis.
• The observed low lipoprotein(a) levels in GSD1a patients require further investigation to determine their role in atherogenesis.