A methodology for determination of phospholipids.

Area of Science:

• Biochemistry
• Analytical Chemistry
• Clinical Diagnostics

Background:

• Phospholipids are crucial components of biological membranes.
• Accurate quantification of phospholipids is essential for various diagnostic and research applications.
• Existing methods for phospholipid determination can be complex or time-consuming.

Purpose of the Study:

• To develop a simple, sensitive, and rapid method for determining phospholipid concentrations.
• To enable simultaneous quantification of total, zwitterionic, and anionic phospholipids.
• To apply the developed method for phospholipid analysis in amniotic fluid.

Main Methods:

• Utilized a dye-detergent complex (Coomassie brilliant blue and cetyltrimethylammonium bromide) that solubilizes in the presence of phospholipids.
• Employed a spectrophotometric assay measuring absorbance at >600 nm, correlating with phospholipid concentration.
• Developed a solid-phase assay using reagent-adsorbed glass beads for phospholipid estimation (2-25 µg/ml).
• Incorporated a phase-partitioning system to differentiate zwitterionic and anionic phospholipids.

Main Results:

• Demonstrated a linear relationship between absorbance intensity and phospholipid concentration.
• Achieved accurate quantification of total phospholipids in the range of 2-25 µg/ml.
• Successfully differentiated and quantified zwitterionic and anionic phospholipids based on their partitioning behavior.
• Validated the method's applicability for phospholipid determination in amniotic fluid samples.

Conclusions:

• The developed CBB-CTAB assay provides a convenient, sensitive, and rapid method for phospholipid analysis.
• This assay allows for the simultaneous determination of total, zwitterionic, and anionic phospholipid concentrations.
• The method is suitable for applications in biological fluid analysis, including amniotic fluid.