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Carcinoembryonic antigen in amniotic fluid

H Gadler, B Wahren, J Lindsten

    Acta Medica Scandinavica
    |January 1, 1977
    PubMed
    Summary
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    Carcinoembryonic antigen (CEA) levels in amniotic fluid decrease throughout normal pregnancy. Elevated CEA in amniotic fluid may indicate fetal anomalies.

    Area of Science:

    • Obstetrics and Gynecology
    • Biochemistry
    • Oncofetal Antigens

    Background:

    • Carcinoembryonic antigen (CEA) is found in fetal gut and gastrointestinal tumors.
    • CEA presence in amniotic fluid across pregnancy stages is documented.

    Purpose of the Study:

    • To quantify CEA levels in amniotic fluid during normal pregnancy.
    • To investigate the association between amniotic fluid CEA and fetal anomalies.

    Main Methods:

    • Radioimmunoassays were used to measure CEA concentrations in amniotic fluid from 91 normal pregnancies.
    • Sephadex G200 gel filtration chromatography characterized CEA's molecular weight.

    Main Results:

    • Mean amniotic fluid CEA decreased from 53 ng/ml at 19 weeks to 25 ng/ml at term in normal pregnancies.

    Related Experiment Videos

  • Amniotic fluid CEA exhibited a molecular weight similar to purified CEA from colon cancer metastases.
  • Five of 17 abnormal pregnancies showed elevated amniotic fluid CEA levels.

    • Conclusions:

    • Amniotic fluid contains CEA with a molecular weight comparable to that found in certain cancers.
    • Decreasing CEA levels are characteristic of normal pregnancy progression.
    • Elevated amniotic fluid CEA may serve as a potential biomarker for fetal abnormalities.