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Type V hyperlipoproteinaemia re-visted: findings in a sydney population
Insights
Type V hyperlipoproteinaemia, a rare lipid disorder, often affects males and is linked to obesity and diabetes. Treatment responses vary, with alcohol withdrawal and dietary changes showing promise.
Area of Science:
- Metabolic Disorders
- Lipid Metabolism
- Clinical Biochemistry
Background:
- Type V hyperlipoproteinaemia is a rare genetic disorder characterized by elevated levels of both cholesterol and triglycerides.
- This condition is associated with a high incidence of comorbidities including obesity, vascular disease, acute abdominal pain, gout, diabetes mellitus, and alcoholism.
Purpose of the Study:
- To review the clinical and biochemical features of eleven patients diagnosed with Type V hyperlipoproteinaemia.
- To investigate the associations between Type V hyperlipoproteinaemia and common comorbidities.
- To evaluate the variable responses to different treatment modalities.
Main Methods:
- Retrospective review of clinical and biochemical data from eleven male patients with Type V hyperlipoproteinaemia.
- Analysis of plasma lipid profiles, including cholesterol and triglyceride levels.
- Assessment of treatment responses to alcohol withdrawal, diabetes management, and carbohydrate-calorie restriction.
Main Results:
- All studied patients were male, with significant co-occurrence of obesity, vascular disease, acute abdominal pain, gout, diabetes mellitus, and alcoholism.
- Plasma cholesterol ranged from 212 to 1512 mg/100ml and triglycerides from 708 to 7670 mg/100 ml.
- Lipaemia led to hyponatraemia and interfered with glucose and amylase measurements. Chylomicronaemia and hyperprebetalipoproteinaemia were associated with reduced beta and alpha lipoproteins, which were cholesterol-depleted relative to triglycerides.
Conclusions:
- Type V hyperlipoproteinaemia presents with a distinct set of clinical and biochemical abnormalities and is frequently associated with metabolic comorbidities.
- Treatment outcomes are variable, with alcohol withdrawal and specific diabetes management strategies showing potential for lipid improvement.
- Further research is needed to clarify the optimal therapeutic approaches and understand the contributions of different interventions.
Abstract:
The clinical and biochemical features of eleven patients with Type V hyperlipoproteinaemia have been reviewed. All patients were male, and there was a high incidence in the group of obesity, vascular disease, acute abdominal pain, gout, diabetes mellitus and alcoholism. Plasma cholesterol concentrations ranged from 212 to 1512 mg/100ml and triglycerides from 708 to 7670 mg/100 ml. Lipaemia was associated with significant hyponatraemia, and also interfered with the determination of plasma glucose and serum amylase. Chylomicronaemia and hyperprebetalipoproteinaemia were accompanied by reduction in the pools of beta and alpha lipoproteins. All lipoprotein classes were relatively depleted of cholesterol compared to triglyceride. There was a variable pattern of treatment response. In some patients alcohol withdrawal produced a rapid improvement in plasma lipids. In diabetes mellitus there were two types of response: a rapid one in chronic insulin deficiency, and secondly, a more gradual one in mild diabetes associated with hyperinsulinaemia. In other patients there was a rapid response to carbohydrate-calorie restriction but the respective contributions of each of the steps remained unclear.