Amniotic fluid phospholipids measured by continuous-development thin-layer chromatography

Area of Science:

• Clinical Chemistry
• Biochemistry
• Analytical Chemistry

Background:

• Accurate assessment of fetal lung maturity is critical in high-risk pregnancies.
• Phospholipids in amniotic fluid, particularly lecithin and sphingomyelin, are key indicators.
• Existing methods for phospholipid analysis can be time-consuming or lack sensitivity.

Purpose of the Study:

• To develop a sensitive and efficient chromatographic system for analyzing amniotic fluid phospholipids.
• To improve the detection of changes in the lecithin/sphingomyelin ratio.

Main Methods:

• A one-dimensional thin-layer chromatography system was developed.
• Short-bed continuous development and high-performance thin-layer chromatography were employed.
• Phospholipids were detected using an antimony molybdate stain and quantified via transmittance densitometry.

Main Results:

• The system successfully separated phosphatidylcholine, sphingomyelin, phosphatidylglycerol, phosphatidylinositol, phosphatidylserine, and phosphatidylethanolamine.
• The method demonstrated higher sensitivity to lecithin/sphingomyelin ratio changes compared to planimetric evaluations.

Conclusions:

• This high-performance thin-layer chromatography system provides a sensitive and effective method for analyzing amniotic fluid phospholipids.
• The improved sensitivity aids in more accurate assessment of fetal lung maturity through lecithin/sphingomyelin ratio evaluation.