mortality/aging
• 80% of mice die within 24h of birth but are present at expected numbers at E18.5
• however, a small proportion of mice survive to adulthood
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respiratory system
• from E16.5-E18.5 lung development is delayed by1.0 day compared to controls
• no signs of catch-up in lung development are seen between E18.5 and P0 suggesting that lung immaturity may contribute to neonatal death and respiratory distress
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• at E15.5 lungs show fewer and larger epithelial tubes and lungs have a more sponge-like appearance
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• at P0, probably due to immature lungs
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homeostasis/metabolism
liver/biliary system
• delay in hepatic hematopoiesis with fewer hematopoietic cells present at E13.5 and a delay in the normal decline in hematopoietic cells so that at E16.5 the liver is still dominated by hematopoietic cells
• red cells in livers retain their nuclei unlike in wild-type controls
• at P0 liver development continues to appear delayed with an increase in the number of hematopoietic cells and poor formation of hepatic cords
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reproductive system
N |
• surviving mice are fertile
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growth/size/body
• development appears to be delayed by 0.75 to 1.0 days
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• from E8.5 onward
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• all dead pups are smaller than wild-type or heterozygous littermate controls
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• surviving mice are smaller at weaning and as adults
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• at weaning average body weight is about half that of wild-type controls
• at 19 weeks of age average body weight of males and females is 65% and 72% of their gender-matched wild-type controls
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• at 19 weeks of age, body length is about 90% of wild-type controls
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• body weight is decreased by 35% at E18.5
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hematopoietic system
• delay in hepatic hematopoiesis with fewer hematopoietic cells present at E13.5 and a delay in the normal decline in hematopoietic cells so that at E16.5 the liver is still dominated by hematopoietic cells
• red cells in livers retain their nuclei unlike in wild-type controls
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embryo
• development appears to be delayed by 0.75 to 1.0 days
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• from E8.5 onward
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