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Lactoferrin in human amniotic fluid.

A Niemelä¹, M Kulomaa, P Vija

¹Department of Biomedical Sciences, University of Tampere, Finland.

Human Reproduction (Oxford, England)

|January 1, 1989

Summary

Human lactoferrin (LF) levels rise significantly in amniotic fluid after week 30 of pregnancy. The decidua appears to be the primary source of LF during gestation.

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Area of Science:

Reproductive biology
Maternal-fetal medicine
Biochemistry

Background:

Human lactoferrin (LF) is an iron-binding glycoprotein with antimicrobial and immunomodulatory properties.
Its presence and role in the feto-maternal environment during pregnancy are not fully understood.

Purpose of the Study:

To quantify human lactoferrin (LF) concentrations in various pregnancy-related tissues and fluids.
To investigate the potential origin and gestational changes of LF.

Main Methods:

Radioimmunoassay and non-competitive avidin-biotin assay were used for LF quantification.
Samples included amniotic fluid, cord blood, decidua, trophoblast, fetal membranes, and umbilical cord.
Samples were collected via amniocentesis and after delivery (vaginal or Cesarean section).

Main Results:

LF was undetectable in amniotic fluid before 20 weeks of gestation.
LF concentration significantly increased around week 30 and remained high until term.
Highest LF concentrations were found in the decidua, followed by amniotic and chorion membranes, and trophoblast; umbilical cord had minimal LF.

Conclusions:

The decidua is suggested as the primary source of human lactoferrin (LF) during pregnancy.
LF levels in amniotic fluid exhibit a distinct pattern of increase in late gestation.
Further research is warranted to elucidate the specific roles of LF in pregnancy.

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