Primary type V hyperlipoproteinemia in childhood

Area of Science:

• Biochemistry
• Pediatric Endocrinology
• Nutritional Science

Background:

• Primary type V hyperlipoproteinemia is a rare genetic disorder characterized by elevated levels of both chylomicrons and very-low-density lipoproteins (VLDL).
• This condition can lead to significant health complications, including pancreatitis and cardiovascular disease.

Observation:

• Metabolic studies were conducted on a 9-year-old girl diagnosed with primary type V hyperlipoproteinemia.
• The patient exhibited normal glucose tolerance, insulin and glucagon responses, and serum uric acid levels.
• Fasting plasma triglyceride levels were monitored under varying dietary fat intake.

Findings:

• Triglyceride levels markedly increased with a diet comprising 40% fat calories and decreased substantially on a 10% fat diet.
• Hepatic and nonhepatic lipase activities in postheparin plasma were within normal ranges, ruling out type I hyperlipoproteinemia.
• The study confirmed the significant impact of dietary fat content on triglyceride levels in type V hyperlipoproteinemia.

Implications:

• Early diagnosis of type V hyperlipoproteinemia is crucial for preventing severe complications like acute pancreatitis.
• Prompt initiation of appropriate diet therapy, specifically fat restriction, is essential for managing hypertriglyceridemia in affected children.
• These findings underscore the critical role of dietary management in the treatment of primary type V hyperlipoproteinemia.