renal/urinary system
• homozygotes show increased baseline urine osmolarity relative to wild-type controls but are able to dilute and concentrate their urine normally
• urine osmolarity is consistently higher regardless of dietary salt intake, suggesting normal salt handling
• serum osmolarity, sodium and blood urea nitrogen (BUN) levels remain unaffected, indicating normal renal function
• increased urinary osmolarity is due to hypodipsia
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• adult kidneys show subtle defects of collecting duct cellular organization and a reduced density of tubules within the deep renal papilla
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• adult homozygotes exhibit a subtle disorganization in the deep papilla of the kidney
• however, the cortex is morphologically normal with no apparent decrease in the number of renal glomeruli
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• when cultured in vitro, E12.5 mutant kidneys show a mild but significant decrease in the number of branches relative to wild-type controls
• however, no difference in nephron number is observed in adult kidneys
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behavior/neurological
• homozygotes drink ~50% the volume of water of wild type controls
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hypodipsia
(
J:171096
)
• increased urinary osmolarity is due to hypodipsia
|
homeostasis/metabolism
• homozygotes show increased baseline urine osmolarity relative to wild-type controls but are able to dilute and concentrate their urine normally
• urine osmolarity is consistently higher regardless of dietary salt intake, suggesting normal salt handling
• serum osmolarity, sodium and blood urea nitrogen (BUN) levels remain unaffected, indicating normal renal function
• increased urinary osmolarity is due to hypodipsia
|
mortality/aging
N |
• no apparent defects in life span
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growth/size/body
N |
• no apparent defects in growth and appearance
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reproductive system
N |
• no apparent defects in fertility
|