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Related Experiment Videos

[Placenta and trisomy 21].

J L Frendo1, F Muller

  • 1Inserm U 427, faculté des sciences pharmaceutiques et biologiques, université René-Descartes, Paris, France.

Gynecologie, Obstetrique & Fertilite
|September 29, 2001
PubMed
Summary
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Trisomy 21 (Down syndrome) disrupts placental development, affecting syncytiotrophoblast formation and hormone secretion. This impacts prenatal screening accuracy and understanding of fetal development in Down syndrome.

Area of Science:

  • Obstetrics and Gynecology
  • Genetics
  • Developmental Biology

Context:

  • Trisomy 21 is the most common genetic cause of intellectual disability.
  • Prenatal diagnosis relies on fetal karyotyping and screening markers influenced by placental function.
  • Placental development in trisomy 21 is not well understood.

Purpose:

  • To investigate the syncytiotrophoblast, a key placental cell type, in trisomy 21 pregnancies.
  • To determine if trisomy 21 affects syncytiotrophoblast formation and hormone production.

Summary:

  • Syncytiotrophoblast formation, involving cytotrophoblast differentiation and fusion, was found to be defective or delayed in trisomy 21.
  • This placental anomaly correlated with impaired synthesis and secretion of pregnancy-specific hormones.

Related Experiment Videos

  • The study elucidates the cellular basis for abnormal placental serum markers in trisomy 21 screening.

    • Impact:

    • Enhances understanding of the biological basis for abnormal maternal serum markers used in trisomy 21 prenatal screening.
    • Provides insights into how placental abnormalities in trisomy 21 may influence fetal development.
    • Improves diagnostic accuracy and counseling for trisomy 21 pregnancies.