Improved method for enzymatic determination of serum triglycerides

Area of Science:

• Biochemistry
• Clinical Chemistry
• Enzymology

Background:

• Accurate measurement of serum triglycerides (triacylglycerols) is crucial for cardiovascular risk assessment.
• Existing enzymatic methods may have limitations in linearity or require blanks.

Purpose of the Study:

• To develop and validate a novel enzymatic method for serum triglyceride determination.
• To enhance assay linearity and precision for reliable clinical use.

Main Methods:

• Triglycerides are hydrolyzed using lipase and esterase.
• Released glycerol is quantified via a coupled enzymatic reaction involving glycerol kinase, pyruvate kinase, and lactate dehydrogenase.
• Adenosine triphosphate (ATP) is used as a competitive inhibitor to extend assay linearity.

Main Results:

• The method demonstrates high precision and accuracy.
• Assay linearity is significantly extended by the addition of ATP.
• The method is insensitive to common interferences and eliminates the need for serum or reagent blanks.
• Successful adaptation to a centrifugal analyzer (ENI GEMSAEC) was achieved.

Conclusions:

• This enzymatic method provides a robust and reliable approach for serum triglyceride measurement.
• The assay's linearity, precision, and automation potential make it suitable for routine clinical diagnostics.
• Elimination of blanks simplifies the procedure and reduces potential errors.