mortality/aging
• embryonic lethality by E14.5
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nervous system
• few axons cross midline to form spinal commissure
• misguidance of sensory axons projecting from dorsal root ganglion into dorsal spinal cord results in a disrupted dorsal root entry zone
• TrkA- positive sensory axons are present in spinal cord
• mislocalized longitudinal axon bundles
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• thinning in ventricular zone in E14.5 embryos
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• absence of ventral spinal commissure observed at E10.5, E12.5 and E14.5
• dorsal-ventral height of the commissure at E14.5 is substantially less than wild-type
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• disrupted dorsal root entry zone
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• central canal is larger than wild-type
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cellular
• few axons cross midline to form spinal commissure
• misguidance of sensory axons projecting from dorsal root ganglion into dorsal spinal cord results in a disrupted dorsal root entry zone
• TrkA- positive sensory axons are present in spinal cord
• mislocalized longitudinal axon bundles
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