cellular
renal/urinary system
Allele Symbol Allele Name Allele ID |
Clcn5tm1Tjj targeted mutation 1, Thomas J Jentsch MGI:2181018 |
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Summary |
3 genotypes
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♀ | phenotype observed in females |
♂ | phenotype observed in males |
N | normal phenotype |
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♀ | phenotype observed in females |
♂ | phenotype observed in males |
N | normal phenotype |
• mutant urine is slightly acidic relative to wild-type
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• urinary phosphate excretion is increased by about 50%
• however, no hypercalciuria is observed
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• mutants exhibit low-molecular-weight proteinuria
• vitamin D binding protein and retinol binding protein are highly elevated in the urine of mutant mice
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• iodinated beta-2 microglobulin is lost into the urine in much larger quantities relative to wild-type
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• mutants display upregulation of proximal tubular alpha-hydroxylation of 25(OH) vitamin D3 to the active hormone
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N |
• mutant mice display no significant defect in endocytosis of asialofetuin in the liver
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N |
• mutant kidneys appear morphologically and histologically normal
• no kidney stones or nephrocalcinosis are observed even after one year
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• mutant urine is slightly acidic relative to wild-type
|
• urinary phosphate excretion is increased by about 50%
• however, no hypercalciuria is observed
|
• mutants exhibit low-molecular-weight proteinuria
• vitamin D binding protein and retinol binding protein are highly elevated in the urine of mutant mice
|
• iodinated beta-2 microglobulin is lost into the urine in much larger quantities relative to wild-type
|
• mutant kidneys show impaired apical proximal tubular endocytosis
(J:77111)
• in autoradiography studies, radioactivity accumulates in deeper (probably pelvic) regions of mutant kidneys as opposed to the cortical region (i.e. proximal tubules)
(J:77111)
• following injection of fluorescently labelled lactoglobulin, wild-type mice accumulate substantial amounts of the protein in vesicles below the brush border of PT cells; in contrast, mutant tubules take up much less protein
(J:77111)
• endocytosis of horseradish peroxidase and of FITC-dextran is also inhibited
(J:77111)
• internalization of the apical transporters NaPi-2 and NHE3 is retarded; at steady state, however, both proteins are redistributed from the plasma membrane to intracellular vesicles
(J:77111)
• defective tubular endocytosis results in increased luminal concentration of parathyroid hormone (PTH) and subsequent stimulation of apical PTH receptors
(J:91340)
• in mutants, apical endosomes of proximal tubular cells are acidified at a significantly lower rate relative to wild-type endosomes
(J:91340)
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Mouse Models of Human Disease |
DO ID | OMIM ID(s) | Ref(s) | |
Dent disease | DOID:0050699 |
OMIM:300009 OMIM:300555 |
J:77111 |
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♀ | phenotype observed in females |
♂ | phenotype observed in males |
N | normal phenotype |
• urine insulin levels are increased compared to in wild-type mice
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• endocytosis is defective compared to in wild-type cells
• renal endosomes fail to undergo acidification unlike in wild-type cells
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• urine insulin levels are increased compared to in wild-type mice
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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 12/10/2024 MGI 6.24 |
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