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An experimental animal model of split cord malformation
T Emura1, M Asashima, K Hashizume
1Department of Pediatric Surgery, Graduate School of Medicine, University of Tokyo, Japan. emura@m.u-tokyo.ac.jp
Pediatric Neurosurgery
|February 22, 2001
Summary
This study created a split cord malformation (SCM) animal model by inducing a fistula. The findings support the theory that SCM may arise from an accessory neurenteric canal.
Area of Science:
- Developmental biology
- Embryology
- Neuroscience
Background:
- Split cord malformation (SCM) is a rare congenital vertebral anomaly.
- The exact etiology of SCM remains incompletely understood.
- Neurenteric canals are transient embryonic structures implicated in spinal cord development.
Purpose of the Study:
- To develop and characterize an experimental animal model of SCM.
- To investigate the potential role of accessory neurenteric canals in SCM development.
- To provide histological insights into SCM formation.
Main Methods:
- Surgical induction of a fistula in Cynopus pyrrhogaster neurulae (stage 18.5 +/- 0.5) to mimic a neurenteric canal.
- Morphological and histological examination of developing embryos post-procedure.
- Analysis of abnormalities in relation to fistula length and duration.
Main Results:
- Successful creation of an SCM animal model.
- Observed abnormalities included hemicords, hemicords with heminotochords, and dermal sinus.
- Histological findings in the model closely resembled those in human SCM cases.
- Abnormality severity correlated with fistula characteristics.
Conclusions:
- The induced fistula successfully modeled SCM.
- The study supports the hypothesis that SCM may originate from an accessory neurenteric canal.
- This model provides a valuable tool for studying SCM pathogenesis.