High serum human macrophage colony-stimulating factor level during pregnancy

Area of Science:

• Immunology
• Reproductive Biology
• Hematology

Background:

• Human macrophage colony-stimulating factor (hM-CSF) is vital for myeloid cell development.
• Its role during pregnancy and in fetal/neonatal development is not fully understood.

Purpose of the Study:

• To investigate maternal, fetal, and neonatal serum levels of hM-CSF during and after pregnancy.
• To identify potential sources of hM-CSF during gestation.

Main Methods:

• Enzyme immunoassay was used to quantify serum hM-CSF levels.
• Samples were collected from pregnant women, postpartum women, cord blood, amniotic fluid, and infants at various postnatal ages.

Main Results:

• Maternal serum hM-CSF markedly elevated during pregnancy, returning to baseline within 3 weeks postpartum.
• Elevated hM-CSF levels were observed in fetal cord blood and newborn infants, with levels higher than fetal in early postnatal life.
• The predominant form of hM-CSF in serum and cord blood was the 85 kDa large form.
• Amniotic fluid showed higher hM-CSF levels than cord blood, suggesting the uterus as a source.

Conclusions:

• Pregnancy is associated with significant changes in maternal, fetal, and neonatal hM-CSF levels.
• Fetuses, newborns, and the uterus appear to be sources of hM-CSF during pregnancy.
• Further research is needed to elucidate the specific functions of hM-CSF during pregnancy.