Analysis Tools|
Allele Symbol Allele Name Allele ID |
Ldb1tm2Lmgd targeted mutation 2, Laboratory of Mammalian Genes and Development, Heiner Westphal MGI:3719683 |
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| Summary |
2 genotypes
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• absent at E18.5
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• greatly reduced in number at E18.5
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• small at E18.5 compared to controls
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• mice die shortly after birth
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| N |
• face development is grossly unaffected; neural crest-derived cells show normal distribution in all facial primordia at E10.5
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• appearance of diastema teeth on the upper jaw
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• a loss of molars is observed in the upper jaw
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• lower molars are developmentally arrested
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• at E13.5, a small localized decrease in mesenchymal cell proliferation is seen in the medial area of the anterior palate
• however, palatal mesenchyme shows no significant differences in apoptosis relative to controls
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• starting at E13.5, the palatal shelf has an abnormal shape being more blunt and wider at the bottom; this is more pronounced in the anterior and middle levels than in the posterior level
• however, no adhesion between the palatal shelf and the tongue or oral epithelium is observed
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• starting at E14.5, the palatal shelves are smaller in the anterior and posterior palate
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• all mice exhibit fully cleft secondary palate at birth
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• at E14.5, the middle palate and the posterior palate remain vertical, whereas the anterior palate is normally elevated above the tongue
• at E18.5, the posterior palate fails to elevate above the tongue, whereas the middle palate appears to have initiated re-orientation as shown by the presence of a protrusion on the medial side of the palatal shelf
• expression of Wnt5a, Pax9 and Osr2, which regulate palatal shelf elevation, is altered
• defect in middle/posterior palatal shelf elevation is not due to mechanical hindrance by the tongue
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• at E14.5 and E18.5, the tongue is abnormally tall
• however, in vitro head culture assays show that the defect in middle/posterior palatal shelf elevation is not due to interference by the tongue
|
|
• appearance of diastema teeth on the upper jaw
|
|
• a loss of molars is observed in the upper jaw
|
|
• lower molars are developmentally arrested
|
|
• at E13.5, a small localized decrease in mesenchymal cell proliferation is seen in the medial area of the anterior palate
• however, palatal mesenchyme shows no significant differences in apoptosis relative to controls
|
|
• starting at E13.5, the palatal shelf has an abnormal shape being more blunt and wider at the bottom; this is more pronounced in the anterior and middle levels than in the posterior level
• however, no adhesion between the palatal shelf and the tongue or oral epithelium is observed
|
|
• starting at E14.5, the palatal shelves are smaller in the anterior and posterior palate
|
|
• all mice exhibit fully cleft secondary palate at birth
|
|
• at E14.5, the middle palate and the posterior palate remain vertical, whereas the anterior palate is normally elevated above the tongue
• at E18.5, the posterior palate fails to elevate above the tongue, whereas the middle palate appears to have initiated re-orientation as shown by the presence of a protrusion on the medial side of the palatal shelf
• expression of Wnt5a, Pax9 and Osr2, which regulate palatal shelf elevation, is altered
• defect in middle/posterior palatal shelf elevation is not due to mechanical hindrance by the tongue
|
|
• at E14.5 and E18.5, the tongue is abnormally tall
• however, in vitro head culture assays show that the defect in middle/posterior palatal shelf elevation is not due to interference by the tongue
|
|
• at E13.5, a small localized decrease in mesenchymal cell proliferation is seen in the medial area of the anterior palate
• however, palatal mesenchyme shows no significant differences in apoptosis relative to controls
|
|
• starting at E13.5, the palatal shelf has an abnormal shape being more blunt and wider at the bottom; this is more pronounced in the anterior and middle levels than in the posterior level
• however, no adhesion between the palatal shelf and the tongue or oral epithelium is observed
|
|
• starting at E14.5, the palatal shelves are smaller in the anterior and posterior palate
|
|
• all mice exhibit fully cleft secondary palate at birth
|
|
• at E14.5, the middle palate and the posterior palate remain vertical, whereas the anterior palate is normally elevated above the tongue
• at E18.5, the posterior palate fails to elevate above the tongue, whereas the middle palate appears to have initiated re-orientation as shown by the presence of a protrusion on the medial side of the palatal shelf
• expression of Wnt5a, Pax9 and Osr2, which regulate palatal shelf elevation, is altered
• defect in middle/posterior palatal shelf elevation is not due to mechanical hindrance by the tongue
|
|
• at E14.5 and E18.5, the tongue is abnormally tall
• however, in vitro head culture assays show that the defect in middle/posterior palatal shelf elevation is not due to interference by the tongue
|
|
• appearance of diastema teeth on the upper jaw
|
|
• a loss of molars is observed in the upper jaw
|
|
• lower molars are developmentally arrested
|
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 09/30/2025 MGI 6.24 |
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