mortality/aging
• fetuses fail to survive beyond E15
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craniofacial
• starting at E10, the maxillary process is hypoplastic as a result of dramatic apoptosis occurring at the medial border of the maxillary process bilaterally around E9.5
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• TUNEL assays showed increased apoptosis in the mesenchyme of the anterior aspect of the medial nasal process (MNP)
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• development of the palatal shelves is delayed at E13.5, suggesting that secondary palate fusion is extremely unlikely (cleft palate not confirmed due to lethality at E15)
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• at E13.5, palatal shelves are hypoplastic
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• at E13.5, embryos exhibit unilateral, or occasionally, bilateral cleft lip extending into the nostril; overall penetrance of cleft lip is 64%
• TUNEL assays showed decreased apoptosis in the epithelial seam between the medial nasal process (MNP) and the maxillary process (MAX) at E11
• at E11, the contact between the medial (MNP) and lateral nasal processes (LNP) is greatly reduced with no apparent involvement of the MAX, resulting in a very small epithelial seam
• cleft lip may be caused by inadequate contact between the MNP and MAX, due to morphological differences, exacerbated by reduced apoptosis and seam persistence
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• occasionally at E13.5
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• frequently at E13.5
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digestive/alimentary system
• development of the palatal shelves is delayed at E13.5, suggesting that secondary palate fusion is extremely unlikely (cleft palate not confirmed due to lethality at E15)
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• at E13.5, palatal shelves are hypoplastic
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growth/size/body
• development of the palatal shelves is delayed at E13.5, suggesting that secondary palate fusion is extremely unlikely (cleft palate not confirmed due to lethality at E15)
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• at E13.5, palatal shelves are hypoplastic
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• at E13.5, embryos exhibit unilateral, or occasionally, bilateral cleft lip extending into the nostril; overall penetrance of cleft lip is 64%
• TUNEL assays showed decreased apoptosis in the epithelial seam between the medial nasal process (MNP) and the maxillary process (MAX) at E11
• at E11, the contact between the medial (MNP) and lateral nasal processes (LNP) is greatly reduced with no apparent involvement of the MAX, resulting in a very small epithelial seam
• cleft lip may be caused by inadequate contact between the MNP and MAX, due to morphological differences, exacerbated by reduced apoptosis and seam persistence
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• occasionally at E13.5
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• frequently at E13.5
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