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Phenotypes Associated with This Genotype
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Dhcr7tm1Gst mutation (1 available); any Dhcr7 mutation (27 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
• all die within 18 hours after birth, presumably from respiratory failure or dehydration (J:71611)
• all mice die within 24 hours of birth and most within 14 hour of birth (J:141730)

• levels of HMG-CoA reductase protein are reduced
• 30- to 40-fold elevation in 7-dehydrocholesterol (7DHC) levels in the brain and liver
• 7-dehydrodesmosterol is accumulated in the brain whereas desmosterol is not detected
• decrease in total sterol levels in the brain and liver
• decrease in cholesterol levels in the brain
• decrease in cholesterol levels in liver
• HMG-CoA reductase activities are reduced 6-fold in the liver and 2.7-fold in brain microsomes

respiratory system
• compact lungs with sparse, unconnected air spaces
• lungs of newborns are similar in appearance to normal 15- to 16-gestational day mice, suggesting that lungs may be immature
• at E19.5, saccular formation is absent with the failure of pre-alveolar septae thinning and development of sac spaces unlike in wild-type mice

• none of the pups suckle
• lack movement shortly after birth

• 12% exhibit cleft palate

renal/urinary system
• 90% exhibit greatly distended urinary bladder

• 12% exhibit cleft palate

digestive/alimentary system
• 12% exhibit cleft palate

liver/biliary system
• decrease in cholesterol levels in liver

nervous system
• decrease in cholesterol levels in the brain

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Smith-Lemli-Opitz syndrome DOID:14692 OMIM:270400

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
MGI 6.17
The Jackson Laboratory