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Related Experiment Videos

Cervical flexion: its contribution to normal and abnormal cardiac morphogenesis

K Kosaki1, A Mendoza, K L Jones

  • 1Department of Pediatrics, University of California San Diego 92103-8446, USA.

Teratology
|September 1, 1996
PubMed
Summary

Preventing cervical flexion in embryos can cause double outlet right ventricle (DORV), a congenital heart defect. This finding is independent of neural crest cell migration, suggesting a mechanical cause for DORV.

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Area of Science:

  • Developmental biology
  • Embryology
  • Cardiovascular science

Background:

  • Cervical flexion's role in cardiac morphogenesis was historically suggested but largely overlooked.
  • Previous research on congenital heart defects often focused on neural crest cell migration.

Purpose of the Study:

  • To investigate the hypothesis that preventing cervical flexion causes double outlet right ventricle (DORV).
  • To determine if this effect is related to neural crest cell migration.

Main Methods:

  • Cervical flexion was experimentally prevented in early-stage embryos (stage 11-12) using suture material in the neural tube.
  • Embryos were analyzed at stage 38 for cardiac abnormalities, including DORV.
  • Hemodynamic and immunohistochemical studies (HNK-1 antibody) were performed to assess neural crest cell migration.

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Main Results:

  • Five out of six surviving embryos (22 total) exhibited DORV.
  • No abnormalities in the aortico-pulmonary septum or aortic arch interruption were observed.
  • Hemodynamic and immunohistochemical data confirmed normal neural crest cell migration.

Conclusions:

  • Prevention of cervical flexion is a potential cause of DORV, independent of neural crest cell migration.
  • Reduced cervical flexion may alter intracardiac flow dynamics, leading to persistent "double outlet" from the right ventricle.