Plasma factor XIII and platelet factor XIII in hyperlipaemia

Area of Science:

• Biochemistry
• Hematology
• Metabolic Disorders

Background:

• Plasma factor XIII is crucial for hemostasis.
• Hypertriglyceridaemia is associated with various metabolic and cardiovascular risks.
• The relationship between factor XIII activity and different types of hyperlipoproteinaemia requires further elucidation.

Purpose of the Study:

• To investigate plasma factor XIII (FXIII) activity in patients with different types of hyperlipoproteinaemia.
• To explore the potential contribution of platelets to plasma FXIII levels.
• To determine the origin of elevated FXIII activity in hypertriglyceridaemia.

Main Methods:

• Quantitative assay for plasma factor XIII (FXIII) activity.
• Comparison of FXIII activity between hyperlipidaemic patients (Types IIa, IV, and combined) and normolipaemic controls.
• Measurement of plasma pseudocholinesterase and platelet FXIII activity.

Main Results:

• Significantly higher plasma FXIII activity was observed in patients with hypertriglyceridaemia (Type IV and combined hyperlipoproteinaemia) compared to controls.
• No elevation in plasma FXIII activity was found in Type IIa hyperlipaemia.
• Plasma FXIII activity did not correlate with platelet counts or platelet FXIII activity, and plasma pseudocholinesterase levels paralleled FXIII activity in hypertriglyceridaemic subjects.

Conclusions:

• Platelets do not significantly contribute to plasma factor XIII activity.
• The increased plasma FXIII activity in hypertriglyceridaemia likely stems from enhanced hepatic synthesis.
• These findings suggest a specific link between hypertriglyceridaemia and hepatic FXIII production.