Major basic protein as a predictor of preterm labor: a preliminary report

Area of Science:

• Obstetrics and Gynecology
• Reproductive Biology
• Biochemistry

Background:

• Preterm labor is a leading cause of neonatal morbidity and mortality.
• Identifying reliable biomarkers for labor onset is crucial for timely intervention.
• Major basic protein (MBP) is a granule protein released by eosinophils, with potential roles in inflammatory processes.

Purpose of the Study:

• To investigate the association between plasma levels of major basic protein (MBP) and the onset of preterm labor.
• To determine if MBP can serve as a predictive marker for labor onset.

Main Methods:

• Plasma samples were collected from 13 pregnant women between 22 and 41 weeks of gestation.
• Serum levels of major basic protein (MBP) were measured.
• Labor onset and delivery methods were recorded.

Main Results:

• Twelve out of 13 women experienced spontaneous labor onset.
• All women with spontaneous labor showed a significant late rise in MBP levels (156% +/- 14%).
• In three patients, increased MBP concentrations preceded preterm labor onset by 3-4 weeks, and labor was successfully managed with tocolytic agents.

Conclusions:

• A significant rise in major basic protein (MBP) is associated with the spontaneous onset of human labor.
• MBP may serve as a potential protein marker for predicting both term and preterm labor onset.
• The absence of an MBP rise in an induced preterm labor case suggests a different underlying mechanism.