mortality/aging
• die around E12.5
• no severe malformations before E10.5
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embryo
• paler and smaller than controls at E11.5 but still viable
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growth/size/body
• paler and smaller than controls at E11.5 but still viable
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cardiovascular system
N |
• normal heart function and yolk sac blood vessels in embryos
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hematopoietic system
• fewer fetal RBC in the liver
• fewer burst forming erythroids and colony forming unit erythroids
• severely impaired cell proliferation amd increased apoptosis
• multinucleate late stage erythroblasts are increased
• less blood in yolk sac blood vessels than for controls
• larger, sometimes multinuclear blood cells
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• normal elevation in numbers after 12 hours in culture
• considerably less increase in numbers than controls after 24 and 36 hours in culture
• proliferation rather than differentiation is disturbed
|
• enucleation of multinucleate erythroblasts is sometimes delayed
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cellular
• frequent failure of cytokinesis during terminal differentiation of erythrocytes
• cleavage furrow forms but destabilizes
• aberrant localization of F actin sometimes
|