mortality/aging
• mutants surviving past the first day die between 4 and 25 days of age
|
• most mutants die during the first postnatal day
|
growth/size/body
• homozygotes are smaller in size than littermates
|
• mutants surviving past the first day exhibit progressive growth retardation until time of death
|
behavior/neurological
• mutants are unable to feed normally, as their stomachs lacked milk and were filled with air
|
• mutants exhibit abnormal limb posturing
|
• mutants exhibit a low level of activity after birth
• surviving mutants exhibit decreased motor activity with time until death between 4 and 25 days of age
|
nervous system
• at 13.5 all parasympathetic ganglia of the head are missing
|
• visceromotor neurons project abnormally in the facial nerve
|
• in E10.5 embryos a subtle increase in the number of dI3 and dI5 neurons is seen
• but, no significant changes in the number of dI2 and dI4/6 neurons is detected
|
• neuronal differentiation is absent or abnormal in this ganglion
|
• neuronal differentiation is absent or abnormal in this ganglion
|
• neither the corda tympani nor the greater superficial petrosal nerve have formed at E11.5
|
• mice show a transient defect in neurogenesis in populations of sensory neurons in the DRGs
|