DMBT1 amount in amniotic fluid depends on gestational age

Area of Science:

• Biochemistry
• Immunology
• Developmental Biology

Background:

• Amniotic fluid is a complex biological medium containing proteins crucial for fetal development and immunity.
• Deleted in Malignant Brain Tumors 1 (DMBT1) is a glycoprotein implicated in innate immunity, angiogenesis, and epithelial differentiation.
• Understanding protein dynamics in amniotic fluid offers insights into fetal well-being and development.

Purpose of the Study:

• To quantify the concentration of DMBT1 in amniotic fluid throughout gestation.
• To investigate the relationship between DMBT1 levels and gestational age.
• To identify potential fetal sources of DMBT1 in amniotic fluid.

Main Methods:

• Enzyme-Linked Immunosorbent Assay (ELISA) was employed to measure DMBT1 concentrations.
• Amniotic fluid samples were collected from neonates of varying gestational ages (preterm and term).
• Fetal tissue RNA was analyzed to correlate DMBT1 expression with its presence in amniotic fluid.

Main Results:

• The median DMBT1 concentration in amniotic fluid was 54.4 ng/ml.
• Significantly lower DMBT1 levels were observed in amniotic fluid from gestations <28 weeks compared to those ≥28 weeks.
• A positive correlation was found between DMBT1 concentration and gestational age (p=0.026).
• Pronounced DMBT1 expression was detected in the fetal gastrointestinal tract.

Conclusions:

• DMBT1 is a component of amniotic fluid, and its concentration is positively correlated with gestational age.
• The fetal gastrointestinal tract is identified as a potential source of DMBT1 found in amniotic fluid.
• These findings contribute to understanding the role of DMBT1 in fetal development and amniotic fluid composition.