Mannose-binding lectin may affect pregnancy outcome

Area of Science:

• Immunology
• Genetics
• Obstetrics

Background:

• Mannose-binding lectin (MBL) is a key innate immune system component activating complement via the lectin pathway.
• Genetic MBL variations and low serum MBL levels are implicated in infection susceptibility and potentially pregnancy complications.

Purpose of the Study:

• To investigate the association between MBL gene codon 54 polymorphism, serum MBL levels, and pregnancy problems, including premature delivery.
• To assess the role of MBL variations in adverse pregnancy outcomes.

Main Methods:

• Prospective study involving 45 mothers with deliveries before 35 gestational weeks.
• Analysis of MBL gene codon 54 polymorphism and serum MBL levels in the study cohort.

Main Results:

• Higher frequency of MBL gene codon 54 variant allele B observed in mothers with preterm delivery compared to healthy populations.
• MBL variant allele B correlated with low MBL levels (<0.1 μg/ml), vaginitis, and elevated IL-6.
• Lower median MBL levels were found in mothers experiencing recurrent miscarriage, infertility, preeclampsia, gestational diabetes, prolonged preterm premature rupture of membranes, and chorioamnionitis.

Conclusions:

• MBL gene codon 54 variant allele B is associated with reduced serum MBL levels, increased IL-6, and genitourinary infections.
• These factors may contribute to pregnancy complications such as infertility, recurrent miscarriage, and preterm delivery.