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Phenotypes Associated with This Genotype
Genotype
MGI:3583450
Allelic
Composition
Ift88Tg737Rpw/Ift88Tg737Rpw
Genetic
Background
FVB/N-Ift88Tg737Rpw
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ift88Tg737Rpw mutation (0 available); any Ift88 mutation (48 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• most die in the first week of life with a few surviving several months (J:18508)
• Background Sensitivity: mice live longer on a C3H background compared to an FVB/N background (J:18508)
• most die before weaning (J:37149)

cellular
• pancreatic cell cilia are reduced in length
• pancreatic cell cilia are reduced in number

renal/urinary system
• bilateral polycyctic kidneys with concurrent destruction of the surrounding parenchyma (J:18508)
• cycts are initially located in the proximal tubules in newborns with a progressive shift in location to the collecting ducts with age (J:18508)
• Background Sensitivity: cysts develop at a slower rate on a C3H background compared to an FVB/N background (J:18508)
• at 20-30 days of age, cysts are about 18% of the total kidney area (J:73583)
• all kidney cysts are found in the collecting ducts by 10-14 days of age (J:73583)
• kidneys are slightly enlarged and pale
• low urine specific gravity and urine:serum osmolality ratio
• Background Sensitivity: on a C3H background urine specific gravity and urine:serum osmolality ratio remain normal for much longer

liver/biliary system
• biliary dysplasia (J:18508)
• excess dysplastic bile ductular structures are seen around the in the liver lesion (J:37149)
• proliferation of epithelial cells arising from the portal triad forming primitive, dysplatic and tortuous ductules that expand into the portal and periportal area and can disrupt the limiting plate (J:18508)
• proliferating cells are poorly differentiated and resemble oval cells (J:18508)
• Background Sensitivity: the liver lesion is less severe on a C3H background compared to an FVB/N background (J:18508)
• at 5 days of age, liver lesions center on the portal triad and consist of excess bile ductular structures and proliferating nonparenchymal epithelial cells (J:37149)
• at 10 days of age, proliferating cells expand the portal triad invade the periportal area (J:37149)
• in mice that survive past weaning (55 of 497), proliferating cells can disrupt the limiting plate and invade the hepatic parenchyma (J:37149)
• portal fibrosis (J:18508)
• little hepatic fibrosis (J:37149)

endocrine/exocrine glands
• pancreatic cell cilia are reduced in length
• pancreatic cell cilia are reduced in number
• at 2 days of age, acini appear abnormal, become disorganized and are lost by 21 days of age; however islets appear normal in number and size
• at 1 day of age acini have zymogen granules with a halo appearance at 1 day of age and at 5 days of age show extensive vacuolization, reduced size of the zymogen granules and are lost through apoptosis
• progressive loss of acinar cells, may be secondary to apoptosis
• pancreatic ductular hyperplasia and dysplasia along with the loss of acinar cells are seen; however the islets of Langerhans appear normal
• biliary dysplasia (J:18508)
• excess dysplastic bile ductular structures are seen around the in the liver lesion (J:37149)
• pancreas size is severely reduced at 14 days after birth but not at birth
• proliferating ductules develop into cysts that can be seen microscopically at 15 - 20 days of age (J:73583)
• at E17.5 intralobular and intercalated ducts are dilated and this dilation becomes more severe with age (J:95813)
• the activated form of carboxypeptidase is detected in the pancreas unlike in wild-type controls
• in newborns, circulating amylase levels are increased without any change in creatinine levels; however, by 7 days of age pancreatic amylase levels are markedly reduced

homeostasis/metabolism
• at 14 days of age glucose levels are decreased after fasting compared to fasted wild-type controls
• Background Sensitivity: increase is higher on an FVB/N background compared to a C3H background
• glucose levels remain elevated longer compared to wild-type mice
• marked increase in serum bile acid concentrations
• Background Sensitivity: increase is higher on an FVB/N background compared to a C3H background
• low urine specific gravity and urine:serum osmolality ratio
• Background Sensitivity: on a C3H background urine specific gravity and urine:serum osmolality ratio remain normal for much longer

limbs/digits/tail
• preaxial polydactyly occurs on all limbs
• Background Sensitivity: polydactyly is more variable on a C3H background compared to an FVB/N background

growth/size/body
• proliferating ductules develop into cysts that can be seen microscopically at 15 - 20 days of age (J:73583)
• at E17.5 intralobular and intercalated ducts are dilated and this dilation becomes more severe with age (J:95813)
• bilateral polycyctic kidneys with concurrent destruction of the surrounding parenchyma (J:18508)
• cycts are initially located in the proximal tubules in newborns with a progressive shift in location to the collecting ducts with age (J:18508)
• Background Sensitivity: cysts develop at a slower rate on a C3H background compared to an FVB/N background (J:18508)
• at 20-30 days of age, cysts are about 18% of the total kidney area (J:73583)
• all kidney cysts are found in the collecting ducts by 10-14 days of age (J:73583)
• severe growth retardation
• kidneys are slightly enlarged and pale

digestive/alimentary system
• at 2 days of age, acini appear abnormal, become disorganized and are lost by 21 days of age; however islets appear normal in number and size
• at 1 day of age acini have zymogen granules with a halo appearance at 1 day of age and at 5 days of age show extensive vacuolization, reduced size of the zymogen granules and are lost through apoptosis
• progressive loss of acinar cells, may be secondary to apoptosis
• pancreatic ductular hyperplasia and dysplasia along with the loss of acinar cells are seen; however the islets of Langerhans appear normal

integument
• homozygotes have scruffy fur

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
autosomal recessive polycystic kidney disease DOID:0110861 OMIM:263200
J:18508 , J:37149 , J:73583 , J:95813


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
04/16/2024
MGI 6.23
The Jackson Laboratory