Isolation and characterization of early pregnancy factor

Area of Science:

• Reproductive Biology
• Immunology

Background:

• Early pregnancy factor (EPF) plays a crucial role in maintaining early pregnancy.
• Characterizing EPF is essential for understanding early pregnancy viability and potential complications.

Purpose of the Study:

• To purify and characterize Early Pregnancy Factor (EPF) from human pregnancy sera.
• To identify the molecular weight and isoelectric points of EPF.

Main Methods:

• Purification of EPF from pooled sera of 210 pregnant women (3-8 weeks gestation).
• Utilized Polyacrylamide Gel Electrophoresis (PAGE) and SDS-PAGE for molecular weight determination.
• Isoelectric focusing was performed to determine isoelectric points.

Main Results:

• EPF activity was detected in pregnancy samples (G-II, G-III, G-IV) but not in non-pregnant controls.
• SDS-PAGE revealed three major bands in G-IV at 57.0 kD, 38.0 kD, and 19.0 kD.
• The isoelectric points for G-IV were determined to be 6.45 and 8.20, suggesting a 19.0 kD peptide as the basic active form.

Conclusions:

• The study successfully purified and characterized EPF from early pregnancy sera.
• A 19.0 kD peptide is proposed as the basic active form of EPF.
• These findings contribute to the understanding of early pregnancy biomarkers.