Studies on lipase and esterase in human post heparin plasma

Area of Science:

• Biochemistry
• Enzymology
• Clinical Chemistry

Background:

• Lipase and esterase enzymes play crucial roles in lipid metabolism.
• Understanding their activity in various disease states is important for diagnostics and treatment.
• Post-heparin plasma is a relevant biological sample for studying these enzymes.

Purpose of the Study:

• To investigate the correlation between lipase and esterase activity in post-heparin plasma from patients with diverse diseases.
• To characterize the substrate specificity of these enzymes, particularly concerning triacylglycerol and monoacylglycerol.
• To determine how substrate conversion affects the susceptibility of fatty acid chains to enzymatic hydrolysis.

Main Methods:

• Analysis of lipase and esterase activity in post-heparin plasma samples.
• Enzymatic hydrolysis assays using triacylglycerol and monoacylglycerol as substrates.
• Characterization of fatty acid chain lengths in hydrolyzed ester products.

Main Results:

• A significant positive correlation (r=0.77) was observed between lipase and esterase activity.
• Both enzymes demonstrated the ability to hydrolyze both triacylglycerol and monoacylglycerol.
• Enzymatic hydrolysis revealed that longer fatty acid chains in esters became more susceptible upon conversion from triacylglycerol to monoacylglycerol.

Conclusions:

• Lipase and esterase activities are closely linked in post-heparin plasma across various disease conditions.
• These enzymes exhibit overlapping substrate specificity for acylglycerols.
• The substrate structure influences the susceptibility of fatty acid chains to enzymatic degradation, suggesting a role in lipid processing pathways.